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Allow LIKE/ILIKE to appear in more places in a query.

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Fabien COELHO
This commit is contained in:
Bruce Momjian
2004-04-05 03:07:26 +00:00
parent 6165bbab8c
commit 0969dc867b
3 changed files with 83 additions and 7 deletions
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31
src/backend/parser/gram.y
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@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.449 2004/03/17 20:48:42 tgl Exp $
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.450 2004/04/05 03:07:26 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -194,7 +194,7 @@ static void doNegateFloat(Value *v);
database_name access_method_clause access_method attr_name
index_name name function_name file_name
%type <list> func_name handler_name qual_Op qual_all_Op
%type <list> func_name handler_name qual_Op qual_all_Op subquery_Op
opt_class opt_validator
%type <range> qualified_name OptConstrFromTable
@@ -5692,7 +5692,7 @@ r_expr: row IN_P select_with_parens
/* Stick a NOT on top */
$$ = (Node *) makeA_Expr(AEXPR_NOT, NIL, NULL, (Node *) n);
}
| row qual_all_Op sub_type select_with_parens
| row subquery_Op sub_type select_with_parens
%prec Op
{
SubLink *n = makeNode(SubLink);
@@ -5702,7 +5702,7 @@ r_expr: row IN_P select_with_parens
n->subselect = $4;
$$ = (Node *)n;
}
| row qual_all_Op select_with_parens
| row subquery_Op select_with_parens
%prec Op
{
SubLink *n = makeNode(SubLink);
@@ -5712,7 +5712,7 @@ r_expr: row IN_P select_with_parens
n->subselect = $3;
$$ = (Node *)n;
}
| row qual_all_Op row
| row subquery_Op row
%prec Op
{
$$ = makeRowExpr($2, $1, $3);
@@ -5807,6 +5807,23 @@ qual_all_Op:
| OPERATOR '(' any_operator ')' { $$ = $3; }
;
subquery_Op:
all_Op { $$ = makeList1(makeString($1)); }
| OPERATOR '(' any_operator ')' { $$ = $3; }
| LIKE { $$ = makeList1(makeString("~~")); }
| NOT LIKE { $$ = makeList1(makeString("!~~")); }
| ILIKE { $$ = makeList1(makeString("~~*")); }
| NOT ILIKE { $$ = makeList1(makeString("!~~*")); }
/* cannot put SIMILAR TO here, because SIMILAR TO is a hack.
* the regular expression is preprocessed by a function (similar_escape),
* and the ~ operator for posix regular expressions is used.
* x SIMILAR TO y -> x ~ similar_escape(y)
* this transformation is made on the fly by the parser upwards.
* however the SubLink structure which handles any/some/all stuff
* is not ready for such a thing.
*/
;
/*
* General expressions
* This is the heart of the expression syntax.
@@ -6132,7 +6149,7 @@ a_expr: c_expr { $$ = $1; }
$$ = n;
}
}
| a_expr qual_all_Op sub_type select_with_parens %prec Op
| a_expr subquery_Op sub_type select_with_parens %prec Op
{
SubLink *n = makeNode(SubLink);
n->subLinkType = $3;
@@ -6141,7 +6158,7 @@ a_expr: c_expr { $$ = $1; }
n->subselect = $4;
$$ = (Node *)n;
}
| a_expr qual_all_Op sub_type '(' a_expr ')' %prec Op
| a_expr subquery_Op sub_type '(' a_expr ')' %prec Op
{
if ($3 == ANY_SUBLINK)
$$ = (Node *) makeA_Expr(AEXPR_OP_ANY, $2, $1, $5);