diff options
Diffstat (limited to 'src/backend/parser/parse_expr.c')
| -rw-r--r-- | src/backend/parser/parse_expr.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c index 754e18d687c..86fddc4a7a6 100644 --- a/src/backend/parser/parse_expr.c +++ b/src/backend/parser/parse_expr.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.221 2007/06/23 22:12:51 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.222 2007/10/29 19:40:40 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -606,6 +606,21 @@ transformParamRef(ParseState *pstate, ParamRef *pref) return (Node *) param; } +/* Test whether an a_expr is a plain NULL constant or not */ +static bool +exprIsNullConstant(Node *arg) +{ + if (arg && IsA(arg, A_Const)) + { + A_Const *con = (A_Const *) arg; + + if (con->val.type == T_Null && + con->typename == NULL) + return true; + } + return false; +} + static Node * transformAExprOp(ParseState *pstate, A_Expr *a) { |