Fix incorrect cleanup of tsquery in ts_rewrite(). Per bug #4933 by

 Aaron Marcuse-Kubitza 

diff --git a/src/backend/utils/adt/tsquery_rewrite.c b/src/backend/utils/adt/tsquery_rewrite.c
index 981c729d953dd745bc17776389e730c38f952b45..d4f673340338cb330c4c1d2606ec9551ca0c7010 100644 (file)
--- a/src/backend/utils/adt/tsquery_rewrite.c
+++ b/src/backend/utils/adt/tsquery_rewrite.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/utils/adt/tsquery_rewrite.c,v 1.15 2009/07/16 06:33:44 petere Exp $
+ *   $PostgreSQL: pgsql/src/backend/utils/adt/tsquery_rewrite.c,v 1.16 2009/07/28 09:31:55 teodor Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -217,12 +217,12 @@ dropvoidsubtree(QTNode *root)
 
        root->nchild = j;
 
-       if (root->valnode->qoperator.oper == OP_NOT && root->nchild == 0)
+       if (root->nchild == 0)
        {
            QTNFree(root);
            root = NULL;
        }
-       else if (root->nchild == 1)
+       else if (root->nchild == 1 && root->valnode->qoperator.oper != OP_NOT)
        {
            QTNode     *nroot = root->child[0];