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commit    09e33d1628c74149bf79c8b452e681967463e9da
Author:   Teodor Sigaev <teodor@sigaev.ru>
Date:     Tue Aug 08 15:45:56 2006 +0000
First released in: 8.2.0, 7.3.16, 7.4.14, 8.0.9, 8.1.5

    Fix bug introduced by last patch, thanks again to Mario Weilguni <mweilguni@sime.com>


 contrib/ltree/ltree_gist.c | 30 +++++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

diff --git a/contrib/ltree/ltree_gist.c b/contrib/ltree/ltree_gist.c
index 42348e6e11d..31b27ae90d6 100644
--- a/contrib/ltree/ltree_gist.c
+++ b/contrib/ltree/ltree_gist.c
@@ -459,16 +459,36 @@ gist_isparent(ltree_gist * key, ltree * query)
 	return false;
 }
 
+static ltree *
+copy_ltree( ltree *src ) {
+	ltree *dst = (ltree*)palloc(src->len);
+	memcpy(dst, src, src->len);
+	return dst;
+}
+
 static bool
 gist_ischild(ltree_gist * key, ltree * query)
 {
-	if (ltree_compare(query, LTG_GETLNODE(key)) < 0)
-		return false;
+	ltree      *left = copy_ltree(LTG_GETLNODE(key));
+	ltree      *right = copy_ltree(LTG_GETRNODE(key));
+	bool            res = true;
 
-	if (ltree_compare(query, LTG_GETRNODE(key)) > 0)
-		return false;
+	if (left->numlevel > query->numlevel)
+		left->numlevel = query->numlevel;
 
-	return true;
+	if (ltree_compare(query, left) < 0)
+		res = false;
+
+	if (right->numlevel > query->numlevel)
+		right->numlevel = query->numlevel;
+
+	if (res && ltree_compare(query, right) > 0)
+		res = false;
+
+	pfree(left);
+	pfree(right);
+
+	return res;
 }
 
 static bool


[parent: 01c74da47e6b]