Fix crash in text similarity search with blank characters keyword.

diff --git a/bigm_gin.c b/bigm_gin.c
index 26440d5..cfbe0e8 100644 (file)
--- a/bigm_gin.c
+++ b/bigm_gin.c
@@ -199,18 +199,19 @@ gin_bigm_consistent(PG_FUNCTION_ARGS)
        int32           i;
        int32           ntrue;
 
-       /*
-        * Don't recheck the heap tuple against the query if either
-        * pg_bigm.enable_recheck is disabled or the search word is
-        * the special one so that the index can return the exact
-        * result.
-        */
-       *recheck = bigm_enable_recheck &&
-               (*((bool *) extra_data) || (nkeys != 1));
-
        switch (strategy)
        {
                case LikeStrategyNumber:
+                       /*
+                        * Don't recheck the heap tuple against the query if either
+                        * pg_bigm.enable_recheck is disabled or the search word is
+                        * the special one so that the index can return the exact
+                        * result.
+                        */
+                       Assert(extra_data != NULL);
+                       *recheck = bigm_enable_recheck &&
+                               (*((bool *) extra_data) || (nkeys != 1));
+
                        /* Check if all extracted bigrams are presented. */
                        res = true;
                        for (i = 0; i < nkeys; i++)
@@ -224,6 +225,7 @@ gin_bigm_consistent(PG_FUNCTION_ARGS)
                        break;
                case SimilarityStrategyNumber:
                        /* Count the matches */
+                       *recheck = bigm_enable_recheck;
                        ntrue = 0;
                        for (i = 0; i < nkeys; i++)
                        {