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Define the right-hand input of AT TIME ZONE as a full a_expr instead of

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c_expr.  Perhaps the restriction was once needed to avoid bison errors,
but it seems to work just fine now --- and even generates a slightly
smaller state machine.  This change allows examples like
SELECT '13:45'::timetz AT TIME ZONE '-07:00'::interval;
to work without parentheses around the right-hand input.
This commit is contained in:
Tom Lane 2005-04-23 17:22:16 +00:00
parent 0975b95bc3
commit c114e166e5
1 changed files with 2 additions and 2 deletions
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4
src/backend/parser/gram.y
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@ -11,7 +11,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.487 2005/04/07 01:51:38 neilc Exp $ * $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.488 2005/04/23 17:22:16 tgl Exp $
* *
* HISTORY * HISTORY
* AUTHOR DATE MAJOR EVENT * AUTHOR DATE MAJOR EVENT
@ -6070,7 +6070,7 @@ opt_interval:
a_expr: c_expr { $$ = $1; } a_expr: c_expr { $$ = $1; }
| a_expr TYPECAST Typename | a_expr TYPECAST Typename
{ $$ = makeTypeCast($1, $3); } { $$ = makeTypeCast($1, $3); }
| a_expr AT TIME ZONE c_expr | a_expr AT TIME ZONE a_expr
{ {
FuncCall *n = makeNode(FuncCall); FuncCall *n = makeNode(FuncCall);
n->funcname = SystemFuncName("timezone"); n->funcname = SystemFuncName("timezone");