}
/* Continue and descend into subtree */
}
- /* We can throw error on sight for a set-returning function */
- if ((IsA(node, FuncExpr) &&((FuncExpr *) node)->funcretset) ||
- (IsA(node, OpExpr) &&((OpExpr *) node)->opretset))
- ereport(ERROR,
- (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
- errmsg("aggregate function calls cannot contain set-returning function calls"),
- errhint("You might be able to move the set-returning function into a LATERAL FROM item."),
- parser_errposition(context->pstate, exprLocation(node))));
- /* We can throw error on sight for a window function */
- if (IsA(node, WindowFunc))
- ereport(ERROR,
- (errcode(ERRCODE_GROUPING_ERROR),
- errmsg("aggregate function calls cannot contain window function calls"),
- parser_errposition(context->pstate,
- ((WindowFunc *) node)->location)));
+
+ /*
+ * SRFs and window functions can be rejected immediately, unless we are
+ * within a sub-select within the aggregate's arguments; in that case
+ * they're OK.
+ */
+ if (context->sublevels_up == 0)
+ {
+ if ((IsA(node, FuncExpr) &&((FuncExpr *) node)->funcretset) ||
+ (IsA(node, OpExpr) &&((OpExpr *) node)->opretset))
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("aggregate function calls cannot contain set-returning function calls"),
+ errhint("You might be able to move the set-returning function into a LATERAL FROM item."),
+ parser_errposition(context->pstate, exprLocation(node))));
+ if (IsA(node, WindowFunc))
+ ereport(ERROR,
+ (errcode(ERRCODE_GROUPING_ERROR),
+ errmsg("aggregate function calls cannot contain window function calls"),
+ parser_errposition(context->pstate,
+ ((WindowFunc *) node)->location)));
+ }
if (IsA(node, Query))
{
/* Recurse into subselects */
LINE 1: SELECT min(generate_series(1, 3)) FROM few;
^
HINT: You might be able to move the set-returning function into a LATERAL FROM item.
+-- ... unless they're within a sub-select
+SELECT sum((3 = ANY(SELECT generate_series(1,4)))::int);
+ sum
+-----
+ 1
+(1 row)
+
+SELECT sum((3 = ANY(SELECT lag(x) over(order by x)
+ FROM generate_series(1,4) x))::int);
+ sum
+-----
+ 1
+(1 row)
+
-- SRFs are not allowed in window function arguments, either
SELECT min(generate_series(1, 3)) OVER() FROM few;
ERROR: window function calls cannot contain set-returning function calls
-- SRFs are not allowed in aggregate arguments
SELECT min(generate_series(1, 3)) FROM few;
+-- ... unless they're within a sub-select
+SELECT sum((3 = ANY(SELECT generate_series(1,4)))::int);
+
+SELECT sum((3 = ANY(SELECT lag(x) over(order by x)
+ FROM generate_series(1,4) x))::int);
+
-- SRFs are not allowed in window function arguments, either
SELECT min(generate_series(1, 3)) OVER() FROM few;