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Create new ParseExprKind for use by policy expressions.

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Policy USING and WITH CHECK expressions were using EXPR_KIND_WHERE for
parse analysis, which results in inappropriate ERROR messages when
the expression contains unsupported constructs such as aggregates.
Create a new ParseExprKind called EXPR_KIND_POLICY and tailor the
related messages to fit.

Reported by Noah Misch. Reviewed by Dean Rasheed, Alvaro Herrera,
and Robert Haas. Back-patch to 9.5 where RLS was introduced.
This commit is contained in:
Joe Conway
2015-07-29 15:37:48 -07:00
parent f04ce31475
commit 632cd9f892
7 changed files with 39 additions and 7 deletions
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3
src/backend/parser/parse_expr.c
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@ -1672,6 +1672,7 @@ transformSubLink(ParseState *pstate, SubLink *sublink)
case EXPR_KIND_FROM_SUBSELECT:
case EXPR_KIND_FROM_FUNCTION:
case EXPR_KIND_WHERE:
case EXPR_KIND_POLICY:
case EXPR_KIND_HAVING:
case EXPR_KIND_FILTER:
case EXPR_KIND_WINDOW_PARTITION:
@ -3173,6 +3174,8 @@ ParseExprKindName(ParseExprKind exprKind)
return "function in FROM";
case EXPR_KIND_WHERE:
return "WHERE";
case EXPR_KIND_POLICY:
return "POLICY";
case EXPR_KIND_HAVING:
return "HAVING";
case EXPR_KIND_FILTER: