9.1rc1_max_parsed_words.patch

diff -ru postgresql-9.1rc1/src/backend/tsearch/ts_parse.c postgresql-9.1rc1-dev/src/backend/tsearch/ts_parse.c
--- postgresql-9.1rc1/src/backend/tsearch/ts_parse.c	2011-08-19 02:53:13.000000000 +0530
+++ postgresql-9.1rc1-dev/src/backend/tsearch/ts_parse.c	2011-08-23 21:27:10.000000000 +0530
@@ -525,10 +525,11 @@
 }
 
 void
-hlparsetext(Oid cfgId, HeadlineParsedText *prs, TSQuery query, char *buf, int buflen)
+hlparsetext(Oid cfgId, HeadlineParsedText *prs, TSQuery query, char *buf, int buflen, int max_parsed_words)
 {
 	int			type,
-				lenlemm;
+				lenlemm,
+				numparsed = 0;
 	char	   *lemm = NULL;
 	LexizeData	ldata;
 	TSLexeme   *norms;
@@ -580,8 +581,8 @@
 			else
 				addHLParsedLex(prs, query, lexs, NULL);
 		} while (norms);
-
-	} while (type > 0);
+		numparsed += 1;
+	} while (type > 0 && (max_parsed_words < 0 || numparsed < max_parsed_words));
 
 	FunctionCall1(&(prsobj->prsend), PointerGetDatum(prsdata));
 }
--- postgresql-9.1rc1/src/backend/tsearch/wparser.c	2011-08-19 02:53:13.000000000 +0530
+++ postgresql-9.1rc1-dev/src/backend/tsearch/wparser.c	2011-08-23 21:30:12.000000000 +0530
@@ -304,6 +304,8 @@
 	text	   *out;
 	TSConfigCacheEntry *cfg;
 	TSParserCacheEntry *prsobj;
+	ListCell   *l;
+    int         max_parsed_words = -1;
 
 	cfg = lookup_ts_config_cache(PG_GETARG_OID(0));
 	prsobj = lookup_ts_parser_cache(cfg->prsId);
@@ -317,13 +319,21 @@
 	prs.lenwords = 32;
 	prs.words = (HeadlineWordEntry *) palloc(sizeof(HeadlineWordEntry) * prs.lenwords);
 
-	hlparsetext(cfg->cfgId, &prs, query, VARDATA(in), VARSIZE(in) - VARHDRSZ);
 
 	if (opt)
 		prsoptions = deserialize_deflist(PointerGetDatum(opt));
 	else
 		prsoptions = NIL;
 
+	foreach(l, prsoptions)
+	{
+		DefElem    *defel = (DefElem *) lfirst(l);
+		char	   *val = defGetString(defel);
+		if (pg_strcasecmp(defel->defname, "MaxParsedWords") == 0)
+			max_parsed_words = pg_atoi(val, sizeof(int32), 0);
+    }
+
+	hlparsetext(cfg->cfgId, &prs, query, VARDATA(in), VARSIZE(in) - VARHDRSZ, max_parsed_words);
 	FunctionCall3(&(prsobj->prsheadline),
 				  PointerGetDatum(&prs),
 				  PointerGetDatum(prsoptions),
diff -ru postgresql-9.1rc1/src/include/tsearch/ts_utils.h postgresql-9.1rc1-dev/src/include/tsearch/ts_utils.h
--- postgresql-9.1rc1/src/include/tsearch/ts_utils.h	2011-08-19 02:53:13.000000000 +0530
+++ postgresql-9.1rc1-dev/src/include/tsearch/ts_utils.h	2011-08-23 21:04:14.000000000 +0530
@@ -98,7 +98,7 @@
  */
 
 extern void hlparsetext(Oid cfgId, HeadlineParsedText *prs, TSQuery query,
-			char *buf, int4 buflen);
+			char *buf, int4 buflen, int max_parsed_words);
 extern text *generateHeadline(HeadlineParsedText *prs);
 
 /*