From 1f3b450f875debc29ad5840732bb28c1d3b0ed95 Mon Sep 17 00:00:00 2001 From: Corey Huinker Date: Wed, 17 Jul 2024 23:23:23 -0400 Subject: [PATCH v24 2/5] Create pg_set_attribute_stats function. The function pg_set_attribute_stats is used modify attribute statistics, allowing the user to inflate chose favorable histograms, inflate the frequency of certain values, etc, to see what those changes will evoke from the query planner. The function takes an oid to identify the relation of the attribute, the name of the attribute, a boolean flag to indicate if these are inherited stats or not, and a version flag to indicate if the function should treat the values given as if they came from an older version of postgresql. The remaining parameters correspond to statsitics attributes found in the pg_stats view. If successful, the entire pg_statistic row is overwritten. Any parameter values omitted or directly set to NULL mean that that particular type of statistic will not exist in the new pg_statistic row. There is currently no way to set just a few statistics in the row and leave others as-is. This is partly due to the complexity of expressing such an action, and partly because it would require a complicated reorganization of the existing arrays of statkinds, and might potentially overflow those arrays. While the function does not attempt to validate the statistics given, certain data errors make rendering certain statistics impossible, and thus those data errors will generate a warning, and the function will ignore that statistic and will continue with the operation if the statistic was not required. Examples: - Some statistics kinds come in pairs. For example, the mcv stat consists of two parameters: most_common_vals and most_common_freqs, they must both be present in order to complete the mcv stat. If one is given but not the other, the - Multi-value statistics such as most_common_elems do not allow for any elements within the array provided to be NULL, and any array given with NULLs in it will be rejected, which would also cause the corresponding -freqs parameter to be rejected, thus rejecting the whole stat-kind, but not otherwise affecting other parameters provided. If at least one statistic was written, the pg_statistic row will be modified and the function will return true. A return value of false means that the pre-existing pg_statistic row (if any) remains untouched. The statistics imported by pg_set_attribute_stats are imported transactionally like any other operation. I mention this only because the previous function pg_set_relation_stats, does non-transactional in-place updates (for bloat reasons and because that is how ANALYZE does it). --- src/include/catalog/pg_proc.dat | 9 +- src/include/statistics/statistics.h | 1 + src/backend/catalog/system_functions.sql | 23 + src/backend/statistics/statistics.c | 976 +++++++++++++++++- .../regress/expected/stats_export_import.out | 783 +++++++++++++- src/test/regress/sql/stats_export_import.sql | 611 +++++++++++ doc/src/sgml/func.sgml | 77 ++ 7 files changed, 2477 insertions(+), 3 deletions(-) diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index 468fe6549c..5e553939b7 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -12215,5 +12215,12 @@ proparallel => 'u', prorettype => 'bool', proargtypes => 'oid int4 int4 float4 int4', proargnames => '{relation,version,relpages,reltuples,relallvisible}', - prosrc => 'pg_set_relation_stats' } + prosrc => 'pg_set_relation_stats' }, +{ oid => '8049', + descr => 'set statistics on attribute', + proname => 'pg_set_attribute_stats', provolatile => 'v', proisstrict => 'f', + proparallel => 'u', prorettype => 'bool', + proargtypes => 'oid name bool int4 float4 int4 float4 text _float4 text float4 text _float4 _float4 text float4 text', + proargnames => '{relation,attname,inherited,version,null_frac,avg_width,n_distinct,most_common_vals,most_common_freqs,histogram_bounds,correlation,most_common_elems,most_common_elem_freqs,elem_count_histogram,range_length_histogram,range_empty_frac,range_bounds_histogram}', + prosrc => 'pg_set_attribute_stats' } ] diff --git a/src/include/statistics/statistics.h b/src/include/statistics/statistics.h index 02e9ad024e..1dddf96576 100644 --- a/src/include/statistics/statistics.h +++ b/src/include/statistics/statistics.h @@ -128,4 +128,5 @@ extern StatisticExtInfo *choose_best_statistics(List *stats, char requiredkind, extern HeapTuple statext_expressions_load(Oid stxoid, bool inh, int idx); extern Datum pg_set_relation_stats(PG_FUNCTION_ARGS); +extern Datum pg_set_attribute_stats(PG_FUNCTION_ARGS); #endif /* STATISTICS_H */ diff --git a/src/backend/catalog/system_functions.sql b/src/backend/catalog/system_functions.sql index ae099e328c..e0e9a66aa3 100644 --- a/src/backend/catalog/system_functions.sql +++ b/src/backend/catalog/system_functions.sql @@ -636,6 +636,29 @@ LANGUAGE INTERNAL CALLED ON NULL INPUT VOLATILE PARALLEL SAFE AS 'pg_stat_reset_slru'; +CREATE OR REPLACE FUNCTION + pg_set_attribute_stats(relation oid, + attname name, + inherited bool, + version integer, + null_frac real, + avg_width integer, + n_distinct real, + most_common_vals text DEFAULT NULL, + most_common_freqs real[] DEFAULT NULL, + histogram_bounds text DEFAULT NULL, + correlation real DEFAULT NULL, + most_common_elems text DEFAULT NULL, + most_common_elem_freqs real[] DEFAULT NULL, + elem_count_histogram real[] DEFAULT NULL, + range_length_histogram text DEFAULT NULL, + range_empty_frac real DEFAULT NULL, + range_bounds_histogram text DEFAULT NULL) +RETURNS boolean +LANGUAGE INTERNAL +CALLED ON NULL INPUT VOLATILE +AS 'pg_set_attribute_stats'; + -- -- The default permissions for functions mean that anyone can execute them. -- A number of functions shouldn't be executable by just anyone, but rather diff --git a/src/backend/statistics/statistics.c b/src/backend/statistics/statistics.c index 27fcdb4717..2a43da7c41 100644 --- a/src/backend/statistics/statistics.c +++ b/src/backend/statistics/statistics.c @@ -42,12 +42,28 @@ #include "utils/typcache.h" /* - * Names of parameters found in the function pg_set_relation_stats. + * Names of parameters found in the functions pg_set_relation_stats and + * pg_set_attribute_stats */ const char *relation_name = "relation"; const char *relpages_name = "relpages"; const char *reltuples_name = "reltuples"; const char *relallvisible_name = "relallvisible"; +const char *attname_name = "attname"; +const char *inherited_name = "inherited"; +const char *null_frac_name = "null_frac"; +const char *avg_width_name = "avg_width"; +const char *n_distinct_name = "n_distinct"; +const char *mc_vals_name = "most_common_vals"; +const char *mc_freqs_name = "most_common_freqs"; +const char *histogram_bounds_name = "histogram_bounds"; +const char *correlation_name = "correlation"; +const char *mc_elems_name = "most_common_elems"; +const char *mc_elem_freqs_name = "most_common_elem_freqs"; +const char *elem_count_hist_name = "elem_count_histogram"; +const char *range_length_hist_name = "range_length_histogram"; +const char *range_empty_frac_name = "range_empty_frac"; +const char *range_bounds_hist_name = "range_bounds_histogram"; /* * A role has privileges to set statistics on the relation if any of the @@ -229,3 +245,961 @@ pg_set_relation_stats(PG_FUNCTION_ARGS) PG_RETURN_BOOL(true); } + +/* + * Test if the type is a scalar for MCELEM purposes + */ +static bool +type_is_scalar(Oid typid) +{ + HeapTuple tp; + bool result = false; + + tp = SearchSysCache1(TYPEOID, ObjectIdGetDatum(typid)); + if (HeapTupleIsValid(tp)) + { + Form_pg_type typtup = (Form_pg_type) GETSTRUCT(tp); + + result = (!OidIsValid(typtup->typanalyze)); + ReleaseSysCache(tp); + } + return result; +} + +/* + * If this relation is an index and that index has expressions in it, and + * the attnum specified is known to be an expression, then we must walk + * the list attributes up to the specified attnum to get the right + * expression. + */ +static Node * +get_attr_expr(Relation rel, int attnum) +{ + if ((rel->rd_rel->relkind == RELKIND_INDEX + || (rel->rd_rel->relkind == RELKIND_PARTITIONED_INDEX)) + && (rel->rd_indexprs != NIL) + && (rel->rd_index->indkey.values[attnum - 1] == 0)) + { + ListCell *indexpr_item = list_head(rel->rd_indexprs); + + for (int i = 0; i < attnum - 1; i++) + if (rel->rd_index->indkey.values[i] == 0) + indexpr_item = lnext(rel->rd_indexprs, indexpr_item); + + if (indexpr_item == NULL) /* shouldn't happen */ + elog(ERROR, "too few entries in indexprs list"); + + return (Node *) lfirst(indexpr_item); + } + return NULL; +} + +/* + * Fetch datatype information, this is needed to derive the proper staopN + * and stacollN values. + * + */ +static TypeCacheEntry * +get_attr_stat_type(Relation rel, Name attname, + int16 *attnum, int32 *typmod, Oid *typcoll) +{ + Oid relid = RelationGetRelid(rel); + Form_pg_attribute attr; + HeapTuple atup; + Oid typid; + Node *expr; + + atup = SearchSysCache2(ATTNAME, ObjectIdGetDatum(relid), + NameGetDatum(attname)); + + /* Attribute not found */ + if (!HeapTupleIsValid(atup)) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s has no attname %s", + RelationGetRelationName(rel), + NameStr(*attname)))); + return NULL; + } + + attr = (Form_pg_attribute) GETSTRUCT(atup); + if (attr->attisdropped) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s is dropped", + RelationGetRelationName(rel), + NameStr(*attname)))); + return NULL; + } + *attnum = attr->attnum; + + expr = get_attr_expr(rel, attr->attnum); + + if (expr == NULL) + { + /* regular attribute */ + typid = attr->atttypid; + *typmod = attr->atttypmod; + *typcoll = attr->attcollation; + } + else + { + typid = exprType(expr); + *typmod = exprTypmod(expr); + + /* + * If a collation has been specified for the index column, use that in + * preference to anything else; but if not, fall back to whatever we + * can get from the expression. + */ + if (OidIsValid(attr->attcollation)) + *typcoll = attr->attcollation; + else + *typcoll = exprCollation(expr); + } + ReleaseSysCache(atup); + + /* if it's a multirange, step down to the range type */ + if (type_is_multirange(typid)) + typid = get_multirange_range(typid); + + return lookup_type_cache(typid, + TYPECACHE_LT_OPR | TYPECACHE_EQ_OPR); +} + +/* + * Perform the cast of a known TextDatum into the type specified. + * + * If no errors are found, ok is set to true. Otherwise, set ok + * to false, capture the error found, and re-throw at warning level. + */ +static Datum +cast_stavalues(FmgrInfo *flinfo, Datum d, Oid typid, int32 typmod, bool *ok) +{ + LOCAL_FCINFO(fcinfo, 8); + char *s; + Datum result; + ErrorSaveContext escontext = {T_ErrorSaveContext}; + + escontext.details_wanted = true; + + s = TextDatumGetCString(d); + + InitFunctionCallInfoData(*fcinfo, flinfo, 3, InvalidOid, + (Node *) &escontext, NULL); + + fcinfo->args[0].value = CStringGetDatum(s); + fcinfo->args[0].isnull = false; + fcinfo->args[1].value = ObjectIdGetDatum(typid); + fcinfo->args[1].isnull = false; + fcinfo->args[2].value = Int32GetDatum(typmod); + fcinfo->args[2].isnull = false; + + result = FunctionCallInvoke(fcinfo); + + if (SOFT_ERROR_OCCURRED(&escontext)) + { + escontext.error_data->elevel = WARNING; + ThrowErrorData(escontext.error_data); + *ok = false; + } + else + *ok = true; + + pfree(s); + + return result; +} + + +/* + * Check array for any NULLs, and optionally for one-dimensionality. + * + * Report any failures as warnings. + */ +static bool +array_check(Datum datum, int one_dim, const char *statname) +{ + ArrayType *arr = DatumGetArrayTypeP(datum); + int16 elmlen; + char elmalign; + bool elembyval; + Datum *values; + bool *nulls; + int nelems; + + if (one_dim && (arr->ndim != 1)) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be a multidimensional array", statname))); + return false; + } + + get_typlenbyvalalign(ARR_ELEMTYPE(arr), &elmlen, &elembyval, &elmalign); + + deconstruct_array(arr, ARR_ELEMTYPE(arr), elmlen, elembyval, elmalign, + &values, &nulls, &nelems); + + for (int i = 0; i < nelems; i++) + if (nulls[i]) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s array cannot contain NULL values", statname))); + return false; + } + return true; +} + +/* + * Update the pg_statistic record. + */ +static void +update_pg_statistic(Datum values[], bool nulls[]) +{ + Relation sd = table_open(StatisticRelationId, RowExclusiveLock); + CatalogIndexState indstate = CatalogOpenIndexes(sd); + HeapTuple oldtup; + HeapTuple stup; + + /* Is there already a pg_statistic tuple for this attribute? */ + oldtup = SearchSysCache3(STATRELATTINH, + values[Anum_pg_statistic_starelid - 1], + values[Anum_pg_statistic_staattnum - 1], + values[Anum_pg_statistic_stainherit - 1]); + + if (HeapTupleIsValid(oldtup)) + { + /* Yes, replace it */ + bool replaces[Natts_pg_statistic]; + + for (int i = 0; i < Natts_pg_statistic; i++) + replaces[i] = true; + + stup = heap_modify_tuple(oldtup, RelationGetDescr(sd), + values, nulls, replaces); + ReleaseSysCache(oldtup); + CatalogTupleUpdateWithInfo(sd, &stup->t_self, stup, indstate); + } + else + { + /* No, insert new tuple */ + stup = heap_form_tuple(RelationGetDescr(sd), values, nulls); + CatalogTupleInsertWithInfo(sd, stup, indstate); + } + + heap_freetuple(stup); + CatalogCloseIndexes(indstate); + table_close(sd, NoLock); +} + + + +/* + * Import statistics for a given relation attribute. + * + * This will insert/replace a row in pg_statistic for the given relation and + * attribute name. + * + * The function takes input parameters that correspond to columns in the view + * pg_stats. + * + * Of those, the columns attname, inherited, null_frac, avg_width, and + * n_distinct all correspond to NOT NULL columns in pg_statistic. These + * parameters have no default value and passing NULL to them will result + * in an error. + * + * If there is no attribute with a matching attname in the relation, the + * function will raise an error. Likewise for setting inherited statistics + * on a table that is not partitioned. + * + * The remaining parameters all belong to a specific stakind. Some stakinds + * have multiple parameters, and in those cases both parameters must be + * NOT NULL or both NULL, otherwise an error will be raised. + * + * Omitting a parameter or explicitly passing NULL means that that particular + * stakind is not associated with the attribute. + * + * Parameters that are NOT NULL will be inspected for consistency checks, + * any of which can raise an error. + * + * Parameters corresponding to ANYARRAY columns are instead passed in as text + * values, which is a valid input string for an array of the type or element + * type of the attribute. Any error generated by the array_in() function will + * in turn fail the function. + */ +Datum +pg_set_attribute_stats(PG_FUNCTION_ARGS) +{ + Datum relation_datum = PG_GETARG_DATUM(0); + bool relation_isnull = PG_ARGISNULL(0); + Oid relation = PG_GETARG_OID(0); + + Name attname = PG_GETARG_NAME(1); + bool attname_isnull = PG_ARGISNULL(1); + + Datum inherited_datum = PG_GETARG_DATUM(2); + bool inherited_isnull = PG_ARGISNULL(2); + + int version = PG_GETARG_INT32(3); + int version_isnull = PG_ARGISNULL(3); + + Datum null_frac_datum = PG_GETARG_DATUM(4); + bool null_frac_isnull = PG_ARGISNULL(4); + + Datum avg_width_datum = PG_GETARG_DATUM(5); + bool avg_width_isnull = PG_ARGISNULL(5); + + Datum n_distinct_datum = PG_GETARG_DATUM(6); + bool n_distinct_isnull = PG_ARGISNULL(6); + + Datum mc_vals_datum = PG_GETARG_DATUM(7); + bool mc_vals_isnull = PG_ARGISNULL(7); + + Datum mc_freqs_datum = PG_GETARG_DATUM(8); + bool mc_freqs_isnull = PG_ARGISNULL(8); + + Datum histogram_bounds_datum = PG_GETARG_DATUM(9); + bool histogram_bounds_isnull = PG_ARGISNULL(9); + + Datum correlation_datum = PG_GETARG_DATUM(10); + bool correlation_isnull = PG_ARGISNULL(10); + + Datum mc_elems_datum = PG_GETARG_DATUM(11); + bool mc_elems_isnull = PG_ARGISNULL(11); + + Datum mc_elem_freqs_datum = PG_GETARG_DATUM(12); + bool mc_elem_freqs_isnull = PG_ARGISNULL(12); + + Datum elem_count_hist_datum = PG_GETARG_DATUM(13); + bool elem_count_hist_isnull = PG_ARGISNULL(13); + + Datum range_length_hist_datum = PG_GETARG_DATUM(14); + bool range_length_hist_isnull = PG_ARGISNULL(14); + + Datum range_empty_frac_datum = PG_GETARG_DATUM(15); + bool range_empty_frac_isnull = PG_ARGISNULL(15); + + Datum range_bounds_hist_datum = PG_GETARG_DATUM(16); + bool range_bounds_hist_isnull = PG_ARGISNULL(16); + + Relation rel; + + TypeCacheEntry *typcache; + TypeCacheEntry *elemtypcache = NULL; + + int16 attnum; + int32 typmod; + Oid typcoll; + + FmgrInfo finfo; + + int stakind_count; + + bool has_mcv = false; + bool has_mc_elems = false; + bool has_rl_hist = false; + + /* + * The statkind index, we have only STATISTIC_NUM_SLOTS to hold these stats + */ + int stakindidx = 0; + + Datum values[Natts_pg_statistic]; + bool nulls[Natts_pg_statistic]; + + /* + * Initialize output tuple. + * + * All non-repeating attributes should be NOT NULL. Only values for unused + * statistics slots, and certain stakind-specific values for stanumbersN + * and stavaluesN will ever be set NULL. + */ + for (int i = 0; i < Natts_pg_statistic; i++) + { + values[i] = (Datum) 0; + nulls[i] = false; + } + + /* + * Some parameters are "required" in that nothing can happen if any of + * them are NULL. + */ + if (relation_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be NULL", relation_name))); + PG_RETURN_BOOL(false); + } + + if (attname_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be NULL", attname_name))); + PG_RETURN_BOOL(false); + } + + if (inherited_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be NULL", inherited_name))); + PG_RETURN_BOOL(false); + } + + /* + * NULL version means assume current server version + */ + if (version_isnull) + version = PG_VERSION_NUM; + else + { + if (version < 90200) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("Cannot export statistics prior to version 9.2"))); + PG_RETURN_BOOL(false); + } + } + + if (null_frac_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be NULL", null_frac_name))); + PG_RETURN_BOOL(false); + } + + if (avg_width_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be NULL", avg_width_name))); + PG_RETURN_BOOL(false); + } + + if (n_distinct_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be NULL", n_distinct_name))); + PG_RETURN_BOOL(false); + } + + /* + * Params most_common_vals and most_common_freqs are linked + */ + if ((!mc_vals_isnull) && (!mc_freqs_isnull)) + has_mcv = true; + else if (mc_vals_isnull != mc_freqs_isnull) + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be NULL when %s is NOT NULL", + mc_vals_isnull ? mc_vals_name : mc_freqs_name, + !mc_vals_isnull ? mc_vals_name : mc_freqs_name))); + + /* + * Params most_common_elems and most_common_elem_freqs are linked + */ + if ((!mc_elems_isnull) && (!mc_elem_freqs_isnull)) + has_mc_elems = true; + else if (mc_elems_isnull != mc_elem_freqs_isnull) + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be NULL when %s is NOT NULL", + mc_elems_isnull ? mc_elems_name : mc_elem_freqs_name, + !mc_elems_isnull ? mc_elems_name : mc_elem_freqs_name))); + + /* + * Params range_empty_frac and range_length_histogram are linked + */ + if ((!range_length_hist_isnull) && (!range_empty_frac_isnull)) + has_rl_hist = true; + else if (range_length_hist_isnull != range_empty_frac_isnull) + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be NULL when %s is NOT NULL", + range_length_hist_isnull ? + range_length_hist_name : range_empty_frac_name, + !range_length_hist_isnull ? + range_length_hist_name : range_empty_frac_name))); + + /* + * If a caller specifies more stakind-stats than we have slots to store + * them, reject them all + */ + stakind_count = (int) has_mcv + (int) has_mc_elems + (int) has_rl_hist + + (int) !histogram_bounds_isnull + (int) !correlation_isnull + + (int) !elem_count_hist_isnull + (int) !range_bounds_hist_isnull; + + if (stakind_count > STATISTIC_NUM_SLOTS) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("imported statistics must have a maximum of %d slots " + "but %d given", + STATISTIC_NUM_SLOTS, stakind_count))); + PG_RETURN_BOOL(false); + } + + rel = try_relation_open(relation, ShareUpdateExclusiveLock); + + if (rel == NULL) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("Parameter relation OID %u is invalid", relation))); + PG_RETURN_BOOL(false); + } + + /* + * Many of the values that are set for a particular stakind are entirely + * derived from the attribute itself, or it's expression. + */ + typcache = get_attr_stat_type(rel, attname, &attnum, &typmod, &typcoll); + if (typcache == NULL) + { + relation_close(rel, NoLock); + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("unexpected typecache error"))); + PG_RETURN_BOOL(false); + } + + /* + * Derive element type if we have stat kinds that need it. + * + * This duplicates some type-specific logic found in various typanalyze + * functions which are called from vacuum's examine_attribute(), but using + * that directly has proven awkward. + */ + if (has_mc_elems || !elem_count_hist_isnull) + { + Oid elemtypid; + + if (typcache->type_id == TSVECTOROID) + { + /* + * tsvectors always have a text oid base type and default + * collation + */ + elemtypid = TEXTOID; + typcoll = DEFAULT_COLLATION_OID; + } + else if (typcache->typtype == TYPTYPE_RANGE) + elemtypid = get_range_subtype(typcache->type_id); + else + elemtypid = get_base_element_type(typcache->type_id); + + /* not finding a basetype means we already had it */ + if (elemtypid == InvalidOid) + elemtypid = typcache->type_id; + + /* The stats need the eq_opr, any validation would need the lt_opr */ + elemtypcache = lookup_type_cache(elemtypid, TYPECACHE_EQ_OPR); + if (elemtypcache == NULL) + { + /* warn and ignore any stats that can't be fulfilled */ + has_mc_elems = false; + + if (!mc_elems_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + mc_elems_name))); + mc_elems_isnull = true; + } + + if (!mc_elem_freqs_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + mc_elem_freqs_name))); + mc_elem_freqs_isnull = true; + } + + if (!elem_count_hist_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + elem_count_hist_name))); + elem_count_hist_isnull = true; + } + } + } + + /* + * histogram_bounds and correlation must have a type < operator + */ + if (typcache->lt_opr == InvalidOid) + { + if (!histogram_bounds_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s cannot " + "have stats of type %s, ignored.", + RelationGetRelationName(rel), + NameStr(*attname), + histogram_bounds_name))); + histogram_bounds_isnull = true; + } + + if (!correlation_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s cannot " + "have stats of type %s, ignored.", + RelationGetRelationName(rel), + NameStr(*attname), + correlation_name))); + correlation_isnull = true; + } + } + + /* + * Scalar types can't have most_common_elems, most_common_elem_freqs, or + * element_count_histogram + */ + if (type_is_scalar(typcache->type_id)) + { + /* warn and ignore any stats that can't be fulfilled */ + has_mc_elems = false; + + if (!mc_elems_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s is a scalar type, " + "cannot have stats of type %s, ignored", + RelationGetRelationName(rel), + NameStr(*attname), + mc_elems_name))); + mc_elems_isnull = true; + } + + if (!mc_elem_freqs_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s is a scalar type, " + "cannot have stats of type %s, ignored", + RelationGetRelationName(rel), + NameStr(*attname), + mc_elem_freqs_name))); + mc_elem_freqs_isnull = true; + } + + if (!elem_count_hist_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s is a scalar type, " + "cannot have stats of type %s, ignored", + RelationGetRelationName(rel), + NameStr(*attname), + elem_count_hist_name))); + elem_count_hist_isnull = true; + } + } + + /* Only range types can have range stats */ + if ((typcache->typtype != TYPTYPE_RANGE) && + (typcache->typtype != TYPTYPE_MULTIRANGE)) + { + /* warn and ignore any stats that can't be fulfilled */ + has_rl_hist = false; + + if (!range_length_hist_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s is not a range type, " + "cannot have stats of type %s", + RelationGetRelationName(rel), + NameStr(*attname), + range_length_hist_name))); + range_length_hist_isnull = true; + } + + if (!range_empty_frac_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s is not a range type, " + "cannot have stats of type %s", + RelationGetRelationName(rel), + NameStr(*attname), + range_empty_frac_name))); + range_empty_frac_isnull = true; + } + if (!range_bounds_hist_isnull) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s is not a range type, " + "cannot have stats of type %s", + RelationGetRelationName(rel), + NameStr(*attname), + range_bounds_hist_name))); + range_bounds_hist_isnull = true; + } + } + + if (!can_modify_relation(rel)) + { + relation_close(rel, NoLock); + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("permission denied for relation %s", + RelationGetRelationName(rel)))); + PG_RETURN_BOOL(false); + } + + /* Populate pg_statistic tuple */ + values[Anum_pg_statistic_starelid - 1] = relation_datum; + values[Anum_pg_statistic_staattnum - 1] = Int16GetDatum(attnum); + values[Anum_pg_statistic_stainherit - 1] = inherited_datum; + values[Anum_pg_statistic_stanullfrac - 1] = null_frac_datum; + values[Anum_pg_statistic_stawidth - 1] = avg_width_datum; + values[Anum_pg_statistic_stadistinct - 1] = n_distinct_datum; + + fmgr_info(F_ARRAY_IN, &finfo); + + /* + * STATISTIC_KIND_MCV + * + * most_common_vals: ANYARRAY::text most_common_freqs: real[] + */ + if (has_mcv) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_MCV); + Datum staop = ObjectIdGetDatum(typcache->eq_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + bool converted = false; + Datum stanumbers = mc_freqs_datum; + Datum stavalues = cast_stavalues(&finfo, mc_vals_datum, + typcache->type_id, typmod, + &converted); + + if (converted && + array_check(stavalues, false, mc_vals_name) && + array_check(stanumbers, true, mc_freqs_name)) + { + values[Anum_pg_statistic_stakind1 - 1 + stakindidx] = stakind; + values[Anum_pg_statistic_staop1 - 1 + stakindidx] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + stakindidx] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + stakindidx] = stanumbers; + values[Anum_pg_statistic_stavalues1 - 1 + stakindidx] = stavalues; + + stakindidx++; + } + } + + + /* + * STATISTIC_KIND_HISTOGRAM + * + * histogram_bounds: ANYARRAY::text + */ + if (!histogram_bounds_isnull) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_HISTOGRAM); + Datum staop = ObjectIdGetDatum(typcache->lt_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + Datum stavalues; + bool converted = false; + + stavalues = cast_stavalues(&finfo, histogram_bounds_datum, + typcache->type_id, typmod, &converted); + + if (converted && array_check(stavalues, false, histogram_bounds_name)) + { + values[Anum_pg_statistic_stakind1 - 1 + stakindidx] = stakind; + values[Anum_pg_statistic_staop1 - 1 + stakindidx] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + stakindidx] = stacoll; + nulls[Anum_pg_statistic_stanumbers1 - 1 + stakindidx] = true; + values[Anum_pg_statistic_stavalues1 - 1 + stakindidx] = stavalues; + + stakindidx++; + } + } + + /* + * STATISTIC_KIND_CORRELATION + * + * correlation: real + */ + if (!correlation_isnull) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_CORRELATION); + Datum staop = ObjectIdGetDatum(typcache->lt_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + Datum elems[] = {correlation_datum}; + ArrayType *arry = construct_array_builtin(elems, 1, FLOAT4OID); + Datum stanumbers = PointerGetDatum(arry); + + values[Anum_pg_statistic_stakind1 - 1 + stakindidx] = stakind; + values[Anum_pg_statistic_staop1 - 1 + stakindidx] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + stakindidx] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + stakindidx] = stanumbers; + nulls[Anum_pg_statistic_stavalues1 - 1 + stakindidx] = true; + + stakindidx++; + } + + /* + * STATISTIC_KIND_MCELEM + * + * most_common_elem_freqs: real[] + * + * most_common_elems : ANYARRAY::text + */ + if (has_mc_elems) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_MCELEM); + Datum staop = ObjectIdGetDatum(elemtypcache->eq_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + Datum stanumbers = mc_elem_freqs_datum; + bool converted = false; + Datum stavalues; + + stavalues = cast_stavalues(&finfo, mc_elems_datum, + elemtypcache->type_id, typmod, &converted); + + if (converted && + array_check(stavalues, false, mc_elems_name) && + array_check(stanumbers, true, mc_elem_freqs_name)) + { + values[Anum_pg_statistic_stakind1 - 1 + stakindidx] = stakind; + values[Anum_pg_statistic_staop1 - 1 + stakindidx] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + stakindidx] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + stakindidx] = stanumbers; + values[Anum_pg_statistic_stavalues1 - 1 + stakindidx] = stavalues; + + stakindidx++; + } + } + + /* + * STATISTIC_KIND_DECHIST + * + * elem_count_histogram: real[] + */ + if (!elem_count_hist_isnull) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_DECHIST); + Datum staop = ObjectIdGetDatum(elemtypcache->eq_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + Datum stanumbers = elem_count_hist_datum; + + values[Anum_pg_statistic_stakind1 - 1 + stakindidx] = stakind; + values[Anum_pg_statistic_staop1 - 1 + stakindidx] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + stakindidx] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + stakindidx] = stanumbers; + nulls[Anum_pg_statistic_stavalues1 - 1 + stakindidx] = true; + + stakindidx++; + } + + /* + * STATISTIC_KIND_BOUNDS_HISTOGRAM + * + * range_bounds_histogram: ANYARRAY::text + * + * This stakind appears before STATISTIC_KIND_BOUNDS_HISTOGRAM even though + * it is numerically greater, and all other stakinds appear in numerical + * order. We duplicate this quirk to make before/after tests of + * pg_statistic records easier. + */ + if (!range_bounds_hist_isnull) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_BOUNDS_HISTOGRAM); + Datum staop = ObjectIdGetDatum(InvalidOid); + Datum stacoll = ObjectIdGetDatum(InvalidOid); + + bool converted = false; + Datum stavalues; + + stavalues = cast_stavalues(&finfo, range_bounds_hist_datum, + typcache->type_id, typmod, &converted); + + if (converted && + array_check(stavalues, false, "range_bounds_histogram")) + { + values[Anum_pg_statistic_stakind1 - 1 + stakindidx] = stakind; + values[Anum_pg_statistic_staop1 - 1 + stakindidx] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + stakindidx] = stacoll; + nulls[Anum_pg_statistic_stanumbers1 - 1 + stakindidx] = true; + values[Anum_pg_statistic_stavalues1 - 1 + stakindidx] = stavalues; + + stakindidx++; + } + } + + /* + * STATISTIC_KIND_RANGE_LENGTH_HISTOGRAM + * + * range_empty_frac: real + * + * range_length_histogram: double precision[]::text + */ + if (has_rl_hist) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_RANGE_LENGTH_HISTOGRAM); + Datum staop = ObjectIdGetDatum(Float8LessOperator); + Datum stacoll = ObjectIdGetDatum(InvalidOid); + + /* The anyarray is always a float8[] for this stakind */ + Datum elems[] = {range_empty_frac_datum}; + ArrayType *arry = construct_array_builtin(elems, 1, FLOAT4OID); + Datum stanumbers = PointerGetDatum(arry); + + bool converted = false; + Datum stavalues; + + stavalues = cast_stavalues(&finfo, range_length_hist_datum, FLOAT8OID, + 0, &converted); + + if (converted && + array_check(stavalues, false, range_length_hist_name)) + { + values[Anum_pg_statistic_staop1 - 1 + stakindidx] = staop; + values[Anum_pg_statistic_stakind1 - 1 + stakindidx] = stakind; + values[Anum_pg_statistic_stacoll1 - 1 + stakindidx] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + stakindidx] = stanumbers; + values[Anum_pg_statistic_stavalues1 - 1 + stakindidx] = stavalues; + stakindidx++; + } + } + + /* fill in all remaining slots */ + while (stakindidx < STATISTIC_NUM_SLOTS) + { + values[Anum_pg_statistic_stakind1 - 1 + stakindidx] = Int16GetDatum(0); + values[Anum_pg_statistic_staop1 - 1 + stakindidx] = ObjectIdGetDatum(InvalidOid); + values[Anum_pg_statistic_stacoll1 - 1 + stakindidx] = ObjectIdGetDatum(InvalidOid); + nulls[Anum_pg_statistic_stanumbers1 - 1 + stakindidx] = true; + nulls[Anum_pg_statistic_stavalues1 - 1 + stakindidx] = true; + + stakindidx++; + } + + update_pg_statistic(values, nulls); + + relation_close(rel, NoLock); + PG_RETURN_BOOL(true); +} diff --git a/src/test/regress/expected/stats_export_import.out b/src/test/regress/expected/stats_export_import.out index 9559f8d524..bc99bf3745 100644 --- a/src/test/regress/expected/stats_export_import.out +++ b/src/test/regress/expected/stats_export_import.out @@ -154,7 +154,788 @@ WHERE oid = 'stats_export_import.test'::regclass; 19 | 402 | 6 (1 row) +-- error: object doesn't exist +SELECT pg_catalog.pg_set_attribute_stats( + relation => '0'::oid, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); +WARNING: Parameter relation OID 0 is invalid + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- error: relation null +SELECT pg_catalog.pg_set_attribute_stats( + relation => NULL::oid, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); +WARNING: relation cannot be NULL + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- error: attname null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => NULL::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); +WARNING: attname cannot be NULL + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- error: inherited null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => NULL::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); +WARNING: inherited cannot be NULL + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- error: null_frac null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => NULL::real, + avg_width => 2::integer, + n_distinct => 0.3::real); +WARNING: null_frac cannot be NULL + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- error: avg_width null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => NULL::integer, + n_distinct => 0.3::real); +WARNING: avg_width cannot be NULL + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- error: avg_width null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => NULL::real); +WARNING: n_distinct cannot be NULL + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- ok: no stakinds +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT stanullfrac, stawidth, stadistinct +FROM pg_statistic +WHERE starelid = 'stats_export_import.test'::regclass; + stanullfrac | stawidth | stadistinct +-------------+----------+------------- + 0.1 | 2 | 0.3 +(1 row) + +-- warn: mcv / mcf null mismatch +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_freqs => '{0.1,0.2,0.3}'::real[] + ); +WARNING: most_common_vals cannot be NULL when most_common_freqs is NOT NULL + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: mcv / mcf null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{1,2,3}'::text + ); +WARNING: most_common_freqs cannot be NULL when most_common_vals is NOT NULL + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: mcv / mcf type mismatch +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{2023-09-30,2024-10-31,3}'::text, + most_common_freqs => '{0.2,0.1}'::real[] + ); +WARNING: invalid input syntax for type integer: "2023-09-30" + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warning: mcv cast failure +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{2,four,3}'::text, + most_common_freqs => '{0.3,0.25,0.05}'::real[] + ); +WARNING: invalid input syntax for type integer: "four" + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: mcv+mcf +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{2,1,3}'::text, + most_common_freqs => '{0.3,0.25,0.05}'::real[] + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | id | f | 0.5 | 2 | -0.1 | {2,1,3} | {0.3,0.25,0.05} | | | | | | | | +(1 row) + +-- warn: histogram elements null value +-- this generates no warnings, but perhaps it should +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + histogram_bounds => '{1,NULL,3,4}'::text + ); +WARNING: histogram_bounds array cannot contain NULL values + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: histogram_bounds +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + histogram_bounds => '{1,2,3,4}'::text + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | id | f | 0.5 | 2 | -0.1 | | | {1,2,3,4} | | | | | | | +(1 row) + +-- ok: correlation +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + correlation => 0.5::real); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | id | f | 0.5 | 2 | -0.1 | | | | 0.5 | | | | | | +(1 row) + +-- warn: scalars can't have mcelem +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_elems => '{1,3}'::text, + most_common_elem_freqs => '{0.3,0.2,0.2,0.3,0.0}'::real[] + ); +WARNING: Relation test attname id is a scalar type, cannot have stats of type most_common_elems, ignored +WARNING: Relation test attname id is a scalar type, cannot have stats of type most_common_elem_freqs, ignored + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: mcelem / mcelem mismatch +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_elems => '{one,two}'::text + ); +WARNING: most_common_elem_freqs cannot be NULL when most_common_elems is NOT NULL + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: mcelem / mcelem null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_elem_freqs => '{0.3,0.2,0.2,0.3}'::real[] + ); +WARNING: most_common_elems cannot be NULL when most_common_elem_freqs is NOT NULL + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: mcelem +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_elems => '{one,three}'::text, + most_common_elem_freqs => '{0.3,0.2,0.2,0.3,0.0}'::real[] + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'tags'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | tags | f | 0.5 | 2 | -0.1 | | | | | {one,three} | {0.3,0.2,0.2,0.3,0} | | | | +(1 row) + +-- warn: scalars can't have elem_count_histogram +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + elem_count_histogram => '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); +WARNING: Relation test attname id is a scalar type, cannot have stats of type elem_count_histogram, ignored + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: elem_count_histogram null element +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + elem_count_histogram => '{1,1,NULL,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: elem_count_histogram +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + elem_count_histogram => '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'tags'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------+------------------+------------------------ + stats_export_import | test | tags | f | 0.5 | 2 | -0.1 | | | | | | | {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1} | | | +(1 row) + +-- warn: scalars can't have range stats +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_empty_frac => 0.5::real, + range_length_histogram => '{399,499,Infinity}'::text + ); +WARNING: Relation test attname id is not a range type, cannot have stats of type range_length_histogram +WARNING: Relation test attname id is not a range type, cannot have stats of type range_empty_frac + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: range_empty_frac range_length_hist null mismatch +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_length_histogram => '{399,499,Infinity}'::text + ); +WARNING: range_empty_frac cannot be NULL when range_length_histogram is NOT NULL + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: range_empty_frac range_length_hist null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_empty_frac => 0.5::real + ); +WARNING: range_length_histogram cannot be NULL when range_empty_frac is NOT NULL + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: range_empty_frac + range_length_hist +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_empty_frac => 0.5::real, + range_length_histogram => '{399,499,Infinity}'::text + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'arange'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | arange | f | 0.5 | 2 | -0.1 | | | | | | | | {399,499,Infinity} | 0.5 | +(1 row) + +-- warn: scalars can't have range stats +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_bounds_histogram => '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); +WARNING: Relation test attname id is not a range type, cannot have stats of type range_bounds_histogram + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: range_bounds_histogram +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_bounds_histogram => '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'arange'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+-------------------------------------- + stats_export_import | test | arange | f | 0.5 | 2 | -0.1 | | | | | | | | | | {"[-1,1)","[0,4)","[1,4)","[1,100)"} +(1 row) + +-- warn: exceed STATISTIC_NUM_SLOTS +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{2,1,3}'::text, + most_common_freqs => '{0.3,0.25,0.05}'::real[], + histogram_bounds => '{1,2,3,4}'::text, + correlation => 1.1::real, + most_common_elems => '{3,1}'::text, + most_common_elem_freqs => '{0.3,0.2,0.2,0.3,0.0}'::real[], + range_empty_frac => -0.5::real, + range_length_histogram => '{399,499,Infinity}'::text, + range_bounds_histogram => '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); +WARNING: imported statistics must have a maximum of 5 slots but 6 given + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- +-- Test the ability to exactly copy data from one table to an identical table, +-- correctly reconstructing the stakind order as well as the staopN and +-- stacollN values. Because oids are not stable across databases, we can only +-- test this when the source and destination are on the same database +-- instance. For that reason, we borrow and adapt a query found in fe_utils +-- and used by pg_dump/pg_upgrade. +-- +INSERT INTO stats_export_import.test +SELECT 1, 'one', (1, 1.1, 'ONE', '2001-01-01', '{ "xkey": "xval" }')::stats_export_import.complex_type, int4range(1,4), array['red','green'] +UNION ALL +SELECT 2, 'two', (2, 2.2, 'TWO', '2002-02-02', '[true, 4, "six"]')::stats_export_import.complex_type, int4range(1,4), array['blue','yellow'] +UNION ALL +SELECT 3, 'tre', (3, 3.3, 'TRE', '2003-03-03', NULL)::stats_export_import.complex_type, int4range(-1,1), array['"orange"', 'purple', 'cyan'] +UNION ALL +SELECT 4, 'four', NULL, int4range(0,100), NULL; +CREATE INDEX is_odd ON stats_export_import.test(((comp).a % 2 = 1)); +-- Generate statistics on table with data +ANALYZE stats_export_import.test; +CREATE TABLE stats_export_import.test_clone ( LIKE stats_export_import.test ); +CREATE INDEX is_odd_clone ON stats_export_import.test_clone(((comp).a % 2 = 1)); +-- +-- Turn off ECHO for the transfer, because the actual stats generated by +-- ANALYZE could change, and we don't care about the actual stats, we care +-- about the ability to transfer them to another relation. +-- +\set orig_ECHO :ECHO +\set ECHO none + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT c.relname, COUNT(*) AS num_stats +FROM pg_class AS c +JOIN pg_statistic s ON s.starelid = c.oid +WHERE c.relnamespace = 'stats_export_import'::regnamespace +AND c.relname IN ('test', 'test_clone', 'is_odd', 'is_odd_clone') +GROUP BY c.relname +ORDER BY c.relname; + relname | num_stats +--------------+----------- + is_odd | 1 + is_odd_clone | 1 + test | 5 + test_clone | 5 +(4 rows) + +-- check test minus test_clone +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test_clone'::regclass; + attname | stainherit | stanullfrac | stawidth | stadistinct | stakind1 | stakind2 | stakind3 | stakind4 | stakind5 | staop1 | staop2 | staop3 | staop4 | staop5 | stacoll1 | stacoll2 | stacoll3 | stacoll4 | stacoll5 | stanumbers1 | stanumbers2 | stanumbers3 | stanumbers4 | stanumbers5 | sv1 | sv2 | sv3 | sv4 | sv5 | direction +---------+------------+-------------+----------+-------------+----------+----------+----------+----------+----------+--------+--------+--------+--------+--------+----------+----------+----------+----------+----------+-------------+-------------+-------------+-------------+-------------+-----+-----+-----+-----+-----+----------- +(0 rows) + +-- check test_clone minus test +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test_clone'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test'::regclass; + attname | stainherit | stanullfrac | stawidth | stadistinct | stakind1 | stakind2 | stakind3 | stakind4 | stakind5 | staop1 | staop2 | staop3 | staop4 | staop5 | stacoll1 | stacoll2 | stacoll3 | stacoll4 | stacoll5 | stanumbers1 | stanumbers2 | stanumbers3 | stanumbers4 | stanumbers5 | sv1 | sv2 | sv3 | sv4 | sv5 | direction +---------+------------+-------------+----------+-------------+----------+----------+----------+----------+----------+--------+--------+--------+--------+--------+----------+----------+----------+----------+----------+-------------+-------------+-------------+-------------+-------------+-----+-----+-----+-----+-----+----------- +(0 rows) + +-- check is_odd minus is_odd_clone +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd_clone'::regclass; + attname | stainherit | stanullfrac | stawidth | stadistinct | stakind1 | stakind2 | stakind3 | stakind4 | stakind5 | staop1 | staop2 | staop3 | staop4 | staop5 | stacoll1 | stacoll2 | stacoll3 | stacoll4 | stacoll5 | stanumbers1 | stanumbers2 | stanumbers3 | stanumbers4 | stanumbers5 | sv1 | sv2 | sv3 | sv4 | sv5 | direction +---------+------------+-------------+----------+-------------+----------+----------+----------+----------+----------+--------+--------+--------+--------+--------+----------+----------+----------+----------+----------+-------------+-------------+-------------+-------------+-------------+-----+-----+-----+-----+-----+----------- +(0 rows) + +-- check is_odd_clone minus is_odd +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd_clone'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd'::regclass; + attname | stainherit | stanullfrac | stawidth | stadistinct | stakind1 | stakind2 | stakind3 | stakind4 | stakind5 | staop1 | staop2 | staop3 | staop4 | staop5 | stacoll1 | stacoll2 | stacoll3 | stacoll4 | stacoll5 | stanumbers1 | stanumbers2 | stanumbers3 | stanumbers4 | stanumbers5 | sv1 | sv2 | sv3 | sv4 | sv5 | direction +---------+------------+-------------+----------+-------------+----------+----------+----------+----------+----------+--------+--------+--------+--------+--------+----------+----------+----------+----------+----------+-------------+-------------+-------------+-------------+-------------+-----+-----+-----+-----+-----+----------- +(0 rows) + DROP SCHEMA stats_export_import CASCADE; -NOTICE: drop cascades to 2 other objects +NOTICE: drop cascades to 3 other objects DETAIL: drop cascades to type stats_export_import.complex_type drop cascades to table stats_export_import.test +drop cascades to table stats_export_import.test_clone diff --git a/src/test/regress/sql/stats_export_import.sql b/src/test/regress/sql/stats_export_import.sql index 65d647830c..76a48e0f94 100644 --- a/src/test/regress/sql/stats_export_import.sql +++ b/src/test/regress/sql/stats_export_import.sql @@ -104,4 +104,615 @@ SELECT relpages, reltuples, relallvisible FROM pg_class WHERE oid = 'stats_export_import.test'::regclass; +-- error: object doesn't exist +SELECT pg_catalog.pg_set_attribute_stats( + relation => '0'::oid, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); + +-- error: relation null +SELECT pg_catalog.pg_set_attribute_stats( + relation => NULL::oid, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); + +-- error: attname null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => NULL::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); + +-- error: inherited null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => NULL::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); + +-- error: null_frac null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => NULL::real, + avg_width => 2::integer, + n_distinct => 0.3::real); + +-- error: avg_width null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => NULL::integer, + n_distinct => 0.3::real); + +-- error: avg_width null +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => NULL::real); + +-- ok: no stakinds +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.1::real, + avg_width => 2::integer, + n_distinct => 0.3::real); + +SELECT stanullfrac, stawidth, stadistinct +FROM pg_statistic +WHERE starelid = 'stats_export_import.test'::regclass; + +-- warn: mcv / mcf null mismatch +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_freqs => '{0.1,0.2,0.3}'::real[] + ); + +-- warn: mcv / mcf null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{1,2,3}'::text + ); + +-- warn: mcv / mcf type mismatch +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{2023-09-30,2024-10-31,3}'::text, + most_common_freqs => '{0.2,0.1}'::real[] + ); + +-- warning: mcv cast failure +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{2,four,3}'::text, + most_common_freqs => '{0.3,0.25,0.05}'::real[] + ); + +-- ok: mcv+mcf +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{2,1,3}'::text, + most_common_freqs => '{0.3,0.25,0.05}'::real[] + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + +-- warn: histogram elements null value +-- this generates no warnings, but perhaps it should +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + histogram_bounds => '{1,NULL,3,4}'::text + ); + +-- ok: histogram_bounds +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + histogram_bounds => '{1,2,3,4}'::text + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + +-- ok: correlation +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + correlation => 0.5::real); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + +-- warn: scalars can't have mcelem +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_elems => '{1,3}'::text, + most_common_elem_freqs => '{0.3,0.2,0.2,0.3,0.0}'::real[] + ); + +-- warn: mcelem / mcelem mismatch +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_elems => '{one,two}'::text + ); + +-- warn: mcelem / mcelem null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_elem_freqs => '{0.3,0.2,0.2,0.3}'::real[] + ); + +-- ok: mcelem +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_elems => '{one,three}'::text, + most_common_elem_freqs => '{0.3,0.2,0.2,0.3,0.0}'::real[] + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'tags'; + +-- warn: scalars can't have elem_count_histogram +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + elem_count_histogram => '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); +-- warn: elem_count_histogram null element +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + elem_count_histogram => '{1,1,NULL,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); +-- ok: elem_count_histogram +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'tags'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + elem_count_histogram => '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'tags'; + +-- warn: scalars can't have range stats +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_empty_frac => 0.5::real, + range_length_histogram => '{399,499,Infinity}'::text + ); +-- warn: range_empty_frac range_length_hist null mismatch +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_length_histogram => '{399,499,Infinity}'::text + ); +-- warn: range_empty_frac range_length_hist null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_empty_frac => 0.5::real + ); +-- ok: range_empty_frac + range_length_hist +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_empty_frac => 0.5::real, + range_length_histogram => '{399,499,Infinity}'::text + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'arange'; + +-- warn: scalars can't have range stats +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'id'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_bounds_histogram => '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); +-- ok: range_bounds_histogram +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + range_bounds_histogram => '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'arange'; + +-- warn: exceed STATISTIC_NUM_SLOTS +SELECT pg_catalog.pg_set_attribute_stats( + relation => 'stats_export_import.test'::regclass, + attname => 'arange'::name, + inherited => false::boolean, + version => 150000::integer, + null_frac => 0.5::real, + avg_width => 2::integer, + n_distinct => -0.1::real, + most_common_vals => '{2,1,3}'::text, + most_common_freqs => '{0.3,0.25,0.05}'::real[], + histogram_bounds => '{1,2,3,4}'::text, + correlation => 1.1::real, + most_common_elems => '{3,1}'::text, + most_common_elem_freqs => '{0.3,0.2,0.2,0.3,0.0}'::real[], + range_empty_frac => -0.5::real, + range_length_histogram => '{399,499,Infinity}'::text, + range_bounds_histogram => '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); +-- +-- Test the ability to exactly copy data from one table to an identical table, +-- correctly reconstructing the stakind order as well as the staopN and +-- stacollN values. Because oids are not stable across databases, we can only +-- test this when the source and destination are on the same database +-- instance. For that reason, we borrow and adapt a query found in fe_utils +-- and used by pg_dump/pg_upgrade. +-- +INSERT INTO stats_export_import.test +SELECT 1, 'one', (1, 1.1, 'ONE', '2001-01-01', '{ "xkey": "xval" }')::stats_export_import.complex_type, int4range(1,4), array['red','green'] +UNION ALL +SELECT 2, 'two', (2, 2.2, 'TWO', '2002-02-02', '[true, 4, "six"]')::stats_export_import.complex_type, int4range(1,4), array['blue','yellow'] +UNION ALL +SELECT 3, 'tre', (3, 3.3, 'TRE', '2003-03-03', NULL)::stats_export_import.complex_type, int4range(-1,1), array['"orange"', 'purple', 'cyan'] +UNION ALL +SELECT 4, 'four', NULL, int4range(0,100), NULL; + +CREATE INDEX is_odd ON stats_export_import.test(((comp).a % 2 = 1)); + +-- Generate statistics on table with data +ANALYZE stats_export_import.test; + +CREATE TABLE stats_export_import.test_clone ( LIKE stats_export_import.test ); + +CREATE INDEX is_odd_clone ON stats_export_import.test_clone(((comp).a % 2 = 1)); + +-- +-- Turn off ECHO for the transfer, because the actual stats generated by +-- ANALYZE could change, and we don't care about the actual stats, we care +-- about the ability to transfer them to another relation. +-- +\set orig_ECHO :ECHO +\set ECHO none + +SELECT + format('SELECT pg_catalog.pg_set_attribute_stats( ' + || 'relation => %L::regclass, ' + || 'attname => %L::name, ' + || 'inherited => %L::boolean, ' + || 'version => %L::integer, ' + || 'null_frac => %L::real, ' + || 'avg_width => %L::integer, ' + || 'n_distinct => %L::real %s)', + 'stats_export_import.' || s.tablename || '_clone', + s.attname, + s.inherited, + 150000, + s.null_frac, + s.avg_width, + s.n_distinct, + CASE + WHEN s.most_common_vals IS NULL THEN '' + ELSE format(', most_common_vals => %L::text, most_common_freqs => %L::real[]', + s.most_common_vals, s.most_common_freqs) + END || + CASE + WHEN s.histogram_bounds IS NULL THEN '' + ELSE format(', histogram_bounds => %L::text', s.histogram_bounds) + END || + CASE + WHEN s.correlation IS NULL THEN '' + ELSE format(', correlation => %L::real', s.correlation) + END || + CASE + WHEN s.most_common_elems IS NULL THEN '' + ELSE format(', most_common_elems => %L::text, most_common_elem_freqs => %L::real[]', + s.most_common_elems, s.most_common_elem_freqs) + END || + CASE + WHEN s.elem_count_histogram IS NULL THEN '' + ELSE format(', elem_count_histogram => %L::real[]', + s.elem_count_histogram) + END || + CASE + WHEN s.range_bounds_histogram IS NULL THEN '' + ELSE format(', range_bounds_histogram => %L::text', s.range_bounds_histogram) + END || + CASE + WHEN s.range_empty_frac IS NULL THEN '' + ELSE format(', range_empty_frac => %L::real, range_length_histogram => %L::text', + s.range_empty_frac, s.range_length_histogram) + END) +FROM pg_catalog.pg_stats AS s +WHERE s.schemaname = 'stats_export_import' +AND s.tablename IN ('test', 'is_odd') +\gexec + +-- restore ECHO to original value +\set ECHO :orig_ECHO + +SELECT c.relname, COUNT(*) AS num_stats +FROM pg_class AS c +JOIN pg_statistic s ON s.starelid = c.oid +WHERE c.relnamespace = 'stats_export_import'::regnamespace +AND c.relname IN ('test', 'test_clone', 'is_odd', 'is_odd_clone') +GROUP BY c.relname +ORDER BY c.relname; + +-- check test minus test_clone +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test_clone'::regclass; + +-- check test_clone minus test +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test_clone'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test'::regclass; + +-- check is_odd minus is_odd_clone +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd_clone'::regclass; + +-- check is_odd_clone minus is_odd +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd_clone'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd'::regclass; + DROP SCHEMA stats_export_import CASCADE; diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 4ee0cdb47b..5115a97ac2 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -29845,6 +29845,83 @@ postgres=# SELECT '0/0'::pg_lsn + pd.segment_number * ps.setting::int + :offset + + + + pg_set_attribute_stats + + pg_set_attribute_stats ( + relation regclass + , attname name + , inherited boolean + , version integer + , null_frac real + , avg_width integer + , n_distinct real + [, most_common_vals text + DEFAULT NULL ] + [, most_common_freqs real[] + DEFAULT NULL ] + [, histogram_bounds text + DEFAULT NULL ] + [, correlation real + DEFAULT NULL ] + [, most_common_elems text + DEFAULT NULL ] + [, most_common_elem_freqs real[] + DEFAULT NULL ] + [, elem_count_histogram real[] + DEFAULT NULL ] + [, range_length_histogram text + DEFAULT NULL ] + [, range_empty_frac real + DEFAULT NULL ] + [, range_bounds_histogram text + DEFAULT NULL ] ) + void + + + Replaces the pg_statistic row for the + pg_attribute row specified by + relation, attname + and inherited. + + + The value of version represents the + integer SERVER_VERSION_NUM of the + database that was the source of these values. A value of + NULL means to use the + SERVER_VERSION_NUM of the + current database. It should be noted that presently this value does + not alter the behavior of the function, but it could in future + versions. + + + The remaining parameters all correspond to attributes of the same name + found in pg_stats, + and the values supplied in the parameter must meet the requirements of + the corresponding attribute. Any parameters not supplied are assumed to be NULL. + + + This function mimics the behavior of ANALYZE in its + effects on the values in pg_statistic, except + that the values are supplied as parameters rather than derived from + table sampling. + + + The purpose of this function is to apply statistics values in an + upgrade situation that are "good enough" for system operation until + they are replaced by the next ANALYZE, usually via + autovacuum This function is used by + pg_upgrade and pg_restore to + convey the statistics from the old system version into the new one. + + + The caller must either be the owner of the relation, or have superuser + privileges. + + + -- 2.45.2