Fix query rewrite syntax error of "INSERT ... ON CONFLICT" in native replication...

per bug 654.

diff --git a/src/parser/outfuncs.c b/src/parser/outfuncs.c
index 24ed4b35f71d0836feffc1391482f16605689ce1..01b06c1365761c58adb46aecbfc44356dd54f11b 100644 (file)
--- a/src/parser/outfuncs.c
+++ b/src/parser/outfuncs.c
@@ -5432,8 +5432,12 @@ _outOnConflictClause(String *str, OnConflictClause *node)
                        string_append_char(str, " ( ");
                        _outList(str, node->infer->indexElems);
                        string_append_char(str, " ) ");
-                       string_append_char(str, " WHERE ");
-                       _outNode(str, node->infer->whereClause);
+
+                       if (node->infer->whereClause)
+                       {
+                               string_append_char(str, " WHERE ");
+                               _outNode(str, node->infer->whereClause);
+                       }
                }
                else
                {