Horton

Re: remaining sql/json patches

jian he <jian.universality@gmail.com>

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From: jian he <jian.universality@gmail.com>
To: Amit Langote <amitlangote09@gmail.com>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>, Tomas Vondra <tomas.vondra@enterprisedb.com>, Himanshu Upadhyaya <upadhyaya.himanshu@gmail.com>, Erik Rijkers <er@xs4all.nl>, Andres Freund <andres@anarazel.de>, Andrew Dunstan <andrew@dunslane.net>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2024-04-07T16:34:58Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. SQL/JSON: Various improvements to SQL/JSON query function docs

  2. SQL/JSON: Fix some obsolete comments.

  3. SQL/JSON: Fix issues with DEFAULT .. ON ERROR / EMPTY

  4. JSON_TABLE: Add support for NESTED paths and columns

  5. Fix JsonExpr deparsing to emit QUOTES and WRAPPER correctly

  6. Fix typo introduced in 6185c9737

  7. Add basic JSON_TABLE() functionality

  8. Avoid splitting errmsg string to span multiple lines

  9. Add SQL/JSON query functions

  10. Implement various jsonpath methods

  11. Add soft error handling to some expression nodes

  12. Adjust populate_record_field() to handle errors softly

  13. Refactor code used by jsonpath executor to fetch variables

  14. Test EXPLAIN (FORMAT JSON) ... XMLTABLE

  15. Simplify productions for FORMAT JSON [ ENCODING name ]

  16. Add trailing commas to enum definitions

  17. doc: add missing <returnvalue> and whitespace

  18. Add more SQL/JSON constructor functions

  19. Rename a nonterminal used in SQL/JSON grammar

  20. Some refactoring to export json(b) conversion functions

  21. Don't include CaseTestExpr in JsonValueExpr.formatted_expr

  22. Code review for commit b6e1157e7d

  23. Pass constructName to transformJsonValueExpr()

  24. Unify JSON categorize type API and export for external use

  25. Make some indentation in gram.y consistent

  26. Allow most keywords to be used as column labels without requiring AS.

  27. Reduce size of backend scanner's tables.

  28. Use perfect hashing, instead of binary search, for keyword lookup.

On Sun, Apr 7, 2024 at 9:36 PM Amit Langote <amitlangote09@gmail.com> wrote:
>
>
> 0002 needs an expanded commit message but I've run out of energy today.
>

some cosmetic issues in v51, 0002.

in struct JsonTablePathScan,
/* ERROR/EMPTY ON ERROR behavior */
bool errorOnError;

the comments seem not right.
I think "errorOnError" means
while evaluating the top level JSON path expression, whether "error on
error" is specified or not?


+  | NESTED <optional> PATH </optional> ]
<replaceable>json_path_specification</replaceable> <optional> AS
<replaceable>json_path_name</replaceable> </optional> COLUMNS (
<replaceable>json_table_column</replaceable> <optional>,
...</optional> )
 </synopsis>

"NESTED <optional> PATH </optional> ] "
no need the closing bracket.



+ /* Update the nested plan(s)'s row(s) using this new row. */
+ if (planstate->nested)
+ {
+ JsonTableResetNestedPlan(planstate->nested);
+ if (JsonTablePlanNextRow(planstate->nested))
+ return true;
+ }
+
  return true;
 }

this part can be simplified as:
+ if (planstate->nested)
+{
+ JsonTableResetNestedPlan(planstate->nested);
+ JsonTablePlanNextRow(planstate->nested));
+}
since the last part, if it returns false, eventually it returns true.
also the comments seem slightly confusing?


v51 recursion function(JsonTablePlanNextRow, JsonTablePlanScanNextRow)
is far clearer than v50!
thanks. I think I get it.