Defend against null input in analyze_requires_snapshot(), per report

from Rushabh Lathia.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/backend/parser/analyze.c b/src/backend/parser/analyze.c
index eca385c77e..7dc2d1f324 100644
--- a/src/backend/parser/analyze.c
+++ b/src/backend/parser/analyze.c
@@ -222,13 +222,17 @@ transformStmt(ParseState *pstate, Node *parseTree)
  *		Returns true if a snapshot must be set before doing parse analysis
  *		on the given raw parse tree.
  *
- * Classification here should match transformStmt().
+ * Classification here should match transformStmt(); but we also have to
+ * allow a NULL input (for Parse/Bind of an empty query string).
  */
 bool
 analyze_requires_snapshot(Node *parseTree)
 {
 	bool		result;
 
+	if (parseTree == NULL)
+		return false;
+
 	switch (nodeTag(parseTree))
 	{
 			/*