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-rw-r--r--src/backend/parser/parse_expr.c79
1 files changed, 60 insertions, 19 deletions
diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c
index 92101c9103d..65bd51e1fd6 100644
--- a/src/backend/parser/parse_expr.c
+++ b/src/backend/parser/parse_expr.c
@@ -118,8 +118,7 @@ static Node *transformCurrentOfExpr(ParseState *pstate, CurrentOfExpr *cexpr);
static Node *transformColumnRef(ParseState *pstate, ColumnRef *cref);
static Node *transformWholeRowRef(ParseState *pstate, RangeTblEntry *rte,
int location);
-static Node *transformIndirection(ParseState *pstate, Node *basenode,
- List *indirection);
+static Node *transformIndirection(ParseState *pstate, A_Indirection *ind);
static Node *transformTypeCast(ParseState *pstate, TypeCast *tc);
static Node *transformCollateClause(ParseState *pstate, CollateClause *c);
static Node *make_row_comparison_op(ParseState *pstate, List *opname,
@@ -192,14 +191,8 @@ transformExprRecurse(ParseState *pstate, Node *expr)
}
case T_A_Indirection:
- {
- A_Indirection *ind = (A_Indirection *) expr;
-
- result = transformExprRecurse(pstate, ind->arg);
- result = transformIndirection(pstate, result,
- ind->indirection);
- break;
- }
+ result = transformIndirection(pstate, (A_Indirection *) expr);
+ break;
case T_A_ArrayExpr:
result = transformArrayExpr(pstate, (A_ArrayExpr *) expr,
@@ -439,11 +432,12 @@ unknown_attribute(ParseState *pstate, Node *relref, char *attname,
}
static Node *
-transformIndirection(ParseState *pstate, Node *basenode, List *indirection)
+transformIndirection(ParseState *pstate, A_Indirection *ind)
{
- Node *result = basenode;
+ Node *last_srf = pstate->p_last_srf;
+ Node *result = transformExprRecurse(pstate, ind->arg);
List *subscripts = NIL;
- int location = exprLocation(basenode);
+ int location = exprLocation(result);
ListCell *i;
/*
@@ -451,7 +445,7 @@ transformIndirection(ParseState *pstate, Node *basenode, List *indirection)
* subscripting. Adjacent A_Indices nodes have to be treated as a single
* multidimensional subscript operation.
*/
- foreach(i, indirection)
+ foreach(i, ind->indirection)
{
Node *n = lfirst(i);
@@ -484,6 +478,7 @@ transformIndirection(ParseState *pstate, Node *basenode, List *indirection)
newresult = ParseFuncOrColumn(pstate,
list_make1(n),
list_make1(result),
+ last_srf,
NULL,
location);
if (newresult == NULL)
@@ -632,6 +627,7 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
node = ParseFuncOrColumn(pstate,
list_make1(makeString(colname)),
list_make1(node),
+ pstate->p_last_srf,
NULL,
cref->location);
}
@@ -678,6 +674,7 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
node = ParseFuncOrColumn(pstate,
list_make1(makeString(colname)),
list_make1(node),
+ pstate->p_last_srf,
NULL,
cref->location);
}
@@ -737,6 +734,7 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
node = ParseFuncOrColumn(pstate,
list_make1(makeString(colname)),
list_make1(node),
+ pstate->p_last_srf,
NULL,
cref->location);
}
@@ -927,6 +925,8 @@ transformAExprOp(ParseState *pstate, A_Expr *a)
else
{
/* Ordinary scalar operator */
+ Node *last_srf = pstate->p_last_srf;
+
lexpr = transformExprRecurse(pstate, lexpr);
rexpr = transformExprRecurse(pstate, rexpr);
@@ -934,6 +934,7 @@ transformAExprOp(ParseState *pstate, A_Expr *a)
a->name,
lexpr,
rexpr,
+ last_srf,
a->location);
}
@@ -1053,6 +1054,7 @@ transformAExprNullIf(ParseState *pstate, A_Expr *a)
a->name,
lexpr,
rexpr,
+ pstate->p_last_srf,
a->location);
/*
@@ -1063,6 +1065,12 @@ transformAExprNullIf(ParseState *pstate, A_Expr *a)
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("NULLIF requires = operator to yield boolean"),
parser_errposition(pstate, a->location)));
+ if (result->opretset)
+ ereport(ERROR,
+ (errcode(ERRCODE_DATATYPE_MISMATCH),
+ /* translator: %s is name of a SQL construct, eg NULLIF */
+ errmsg("%s must not return a set", "NULLIF"),
+ parser_errposition(pstate, a->location)));
/*
* ... but the NullIfExpr will yield the first operand's type.
@@ -1266,6 +1274,7 @@ transformAExprIn(ParseState *pstate, A_Expr *a)
a->name,
copyObject(lexpr),
rexpr,
+ pstate->p_last_srf,
a->location);
}
@@ -1430,6 +1439,7 @@ transformBoolExpr(ParseState *pstate, BoolExpr *a)
static Node *
transformFuncCall(ParseState *pstate, FuncCall *fn)
{
+ Node *last_srf = pstate->p_last_srf;
List *targs;
ListCell *args;
@@ -1465,6 +1475,7 @@ transformFuncCall(ParseState *pstate, FuncCall *fn)
return ParseFuncOrColumn(pstate,
fn->funcname,
targs,
+ last_srf,
fn,
fn->location);
}
@@ -1619,7 +1630,8 @@ transformMultiAssignRef(ParseState *pstate, MultiAssignRef *maref)
static Node *
transformCaseExpr(ParseState *pstate, CaseExpr *c)
{
- CaseExpr *newc;
+ CaseExpr *newc = makeNode(CaseExpr);
+ Node *last_srf = pstate->p_last_srf;
Node *arg;
CaseTestExpr *placeholder;
List *newargs;
@@ -1628,8 +1640,6 @@ transformCaseExpr(ParseState *pstate, CaseExpr *c)
Node *defresult;
Oid ptype;
- newc = makeNode(CaseExpr);
-
/* transform the test expression, if any */
arg = transformExprRecurse(pstate, (Node *) c->arg);
@@ -1741,6 +1751,17 @@ transformCaseExpr(ParseState *pstate, CaseExpr *c)
"CASE/WHEN");
}
+ /* if any subexpression contained a SRF, complain */
+ if (pstate->p_last_srf != last_srf)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ /* translator: %s is name of a SQL construct, eg GROUP BY */
+ errmsg("set-returning functions are not allowed in %s",
+ "CASE"),
+ errhint("You might be able to move the set-returning function into a LATERAL FROM item."),
+ parser_errposition(pstate,
+ exprLocation(pstate->p_last_srf))));
+
newc->location = c->location;
return (Node *) newc;
@@ -2177,6 +2198,7 @@ static Node *
transformCoalesceExpr(ParseState *pstate, CoalesceExpr *c)
{
CoalesceExpr *newc = makeNode(CoalesceExpr);
+ Node *last_srf = pstate->p_last_srf;
List *newargs = NIL;
List *newcoercedargs = NIL;
ListCell *args;
@@ -2205,6 +2227,17 @@ transformCoalesceExpr(ParseState *pstate, CoalesceExpr *c)
newcoercedargs = lappend(newcoercedargs, newe);
}
+ /* if any subexpression contained a SRF, complain */
+ if (pstate->p_last_srf != last_srf)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ /* translator: %s is name of a SQL construct, eg GROUP BY */
+ errmsg("set-returning functions are not allowed in %s",
+ "COALESCE"),
+ errhint("You might be able to move the set-returning function into a LATERAL FROM item."),
+ parser_errposition(pstate,
+ exprLocation(pstate->p_last_srf))));
+
newc->args = newcoercedargs;
newc->location = c->location;
return (Node *) newc;
@@ -2793,7 +2826,8 @@ make_row_comparison_op(ParseState *pstate, List *opname,
Node *rarg = (Node *) lfirst(r);
OpExpr *cmp;
- cmp = castNode(OpExpr, make_op(pstate, opname, larg, rarg, location));
+ cmp = castNode(OpExpr, make_op(pstate, opname, larg, rarg,
+ pstate->p_last_srf, location));
/*
* We don't use coerce_to_boolean here because we insist on the
@@ -3000,12 +3034,19 @@ make_distinct_op(ParseState *pstate, List *opname, Node *ltree, Node *rtree,
{
Expr *result;
- result = make_op(pstate, opname, ltree, rtree, location);
+ result = make_op(pstate, opname, ltree, rtree,
+ pstate->p_last_srf, location);
if (((OpExpr *) result)->opresulttype != BOOLOID)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("IS DISTINCT FROM requires = operator to yield boolean"),
parser_errposition(pstate, location)));
+ if (((OpExpr *) result)->opretset)
+ ereport(ERROR,
+ (errcode(ERRCODE_DATATYPE_MISMATCH),
+ /* translator: %s is name of a SQL construct, eg NULLIF */
+ errmsg("%s must not return a set", "IS DISTINCT FROM"),
+ parser_errposition(pstate, location)));
/*
* We rely on DistinctExpr and OpExpr being same struct
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-29 15:50:56 +0000