Index: doc/src/sgml/func.sgml
===================================================================
RCS file: /cvsroot/pgsql/doc/src/sgml/func.sgml,v
retrieving revision 1.255
diff -c -c -r1.255 func.sgml
*** doc/src/sgml/func.sgml 14 Jun 2005 21:04:38 -0000 1.255
--- doc/src/sgml/func.sgml 14 Jun 2005 23:46:19 -0000
***************
*** 282,287 ****
--- 282,293 ----
There is no difference between the two respective forms apart from
the CPU cycles required to rewrite the first one
into the second one internally.
+
+ BETWEEN SYMETRIC
+
+ BETWEEN SYMMETRIC is the same as BETWEEN
+ except there is no requirement that the argument to the left of AND be less than
+ or equal to the argument on the right; the proper range is automatically determined.
Index: src/backend/parser/gram.y
===================================================================
RCS file: /cvsroot/pgsql/src/backend/parser/gram.y,v
retrieving revision 2.492
diff -c -c -r2.492 gram.y
*** src/backend/parser/gram.y 8 Jun 2005 21:15:28 -0000 2.492
--- src/backend/parser/gram.y 14 Jun 2005 23:46:23 -0000
***************
*** 338,344 ****
/* ordinary key words in alphabetical order */
%token ABORT_P ABSOLUTE_P ACCESS ACTION ADD AFTER
AGGREGATE ALL ALSO ALTER ANALYSE ANALYZE AND ANY ARRAY AS ASC
! ASSERTION ASSIGNMENT AT AUTHORIZATION
BACKWARD BEFORE BEGIN_P BETWEEN BIGINT BINARY BIT
BOOLEAN_P BOTH BY
--- 338,344 ----
/* ordinary key words in alphabetical order */
%token ABORT_P ABSOLUTE_P ACCESS ACTION ADD AFTER
AGGREGATE ALL ALSO ALTER ANALYSE ANALYZE AND ANY ARRAY AS ASC
! ASSERTION ASSIGNMENT ASYMMETRIC AT AUTHORIZATION
BACKWARD BEFORE BEGIN_P BETWEEN BIGINT BINARY BIT
BOOLEAN_P BOTH BY
***************
*** 399,405 ****
SAVEPOINT SCHEMA SCROLL SECOND_P SECURITY SELECT SEQUENCE
SERIALIZABLE SESSION SESSION_USER SET SETOF SHARE
SHOW SIMILAR SIMPLE SMALLINT SOME STABLE START STATEMENT
! STATISTICS STDIN STDOUT STORAGE STRICT_P SUBSTRING SYSID
TABLE TABLESPACE TEMP TEMPLATE TEMPORARY THEN TIME TIMESTAMP
TO TOAST TRAILING TRANSACTION TREAT TRIGGER TRIM TRUE_P
--- 399,406 ----
SAVEPOINT SCHEMA SCROLL SECOND_P SECURITY SELECT SEQUENCE
SERIALIZABLE SESSION SESSION_USER SET SETOF SHARE
SHOW SIMILAR SIMPLE SMALLINT SOME STABLE START STATEMENT
! STATISTICS STDIN STDOUT STORAGE STRICT_P SUBSTRING SYMMETRIC
! SYSID
TABLE TABLESPACE TEMP TEMPLATE TEMPORARY THEN TIME TIMESTAMP
TO TOAST TRAILING TRANSACTION TREAT TRIGGER TRIM TRUE_P
***************
*** 6333,6350 ****
{
$$ = (Node *) makeSimpleA_Expr(AEXPR_OF, "!=", $1, (Node *) $6);
}
! | a_expr BETWEEN b_expr AND b_expr %prec BETWEEN
{
$$ = (Node *) makeA_Expr(AEXPR_AND, NIL,
! (Node *) makeSimpleA_Expr(AEXPR_OP, ">=", $1, $3),
! (Node *) makeSimpleA_Expr(AEXPR_OP, "<=", $1, $5));
}
! | a_expr NOT BETWEEN b_expr AND b_expr %prec BETWEEN
{
$$ = (Node *) makeA_Expr(AEXPR_OR, NIL,
! (Node *) makeSimpleA_Expr(AEXPR_OP, "<", $1, $4),
! (Node *) makeSimpleA_Expr(AEXPR_OP, ">", $1, $6));
}
| a_expr IN_P in_expr
{
/* in_expr returns a SubLink or a list of a_exprs */
--- 6334,6374 ----
{
$$ = (Node *) makeSimpleA_Expr(AEXPR_OF, "!=", $1, (Node *) $6);
}
! | a_expr BETWEEN opt_asymmetric b_expr AND b_expr %prec BETWEEN
{
$$ = (Node *) makeA_Expr(AEXPR_AND, NIL,
! (Node *) makeSimpleA_Expr(AEXPR_OP, ">=", $1, $4),
! (Node *) makeSimpleA_Expr(AEXPR_OP, "<=", $1, $6));
}
! | a_expr NOT BETWEEN opt_asymmetric b_expr AND b_expr %prec BETWEEN
{
$$ = (Node *) makeA_Expr(AEXPR_OR, NIL,
! (Node *) makeSimpleA_Expr(AEXPR_OP, "<", $1, $5),
! (Node *) makeSimpleA_Expr(AEXPR_OP, ">", $1, $7));
}
+
+ | a_expr BETWEEN SYMMETRIC b_expr AND b_expr %prec BETWEEN
+ {
+ $$ = (Node *) makeA_Expr(AEXPR_OR, NIL,
+ (Node *) makeA_Expr(AEXPR_AND, NIL,
+ (Node *) makeSimpleA_Expr(AEXPR_OP, ">=", $1, $4),
+ (Node *) makeSimpleA_Expr(AEXPR_OP, "<=", $1, $6)),
+ (Node *) makeA_Expr(AEXPR_AND, NIL,
+ (Node *) makeSimpleA_Expr(AEXPR_OP, ">=", $1, $6),
+ (Node *) makeSimpleA_Expr(AEXPR_OP, "<=", $1, $4)));
+ }
+ | a_expr NOT BETWEEN SYMMETRIC b_expr AND b_expr %prec BETWEEN
+ {
+ $$ = (Node *) makeA_Expr(AEXPR_AND, NIL,
+ (Node *) makeA_Expr(AEXPR_OR, NIL,
+ (Node *) makeSimpleA_Expr(AEXPR_OP, "<", $1, $5),
+ (Node *) makeSimpleA_Expr(AEXPR_OP, ">", $1, $7)),
+ (Node *) makeA_Expr(AEXPR_OR, NIL,
+ (Node *) makeSimpleA_Expr(AEXPR_OP, "<", $1, $7),
+ (Node *) makeSimpleA_Expr(AEXPR_OP, ">", $1, $5)));
+ }
+
+
| a_expr IN_P in_expr
{
/* in_expr returns a SubLink or a list of a_exprs */
***************
*** 6443,6448 ****
--- 6467,6477 ----
}
;
+ opt_asymmetric: ASYMMETRIC {}
+ | /*EMPTY*/ {}
+ ;
+
+
/*
* Restricted expressions
*
***************
*** 7721,7726 ****
--- 7750,7756 ----
| ALTER
| ASSERTION
| ASSIGNMENT
+ | ASYMMETRIC
| AT
| BACKWARD
| BEFORE
***************
*** 7867,7872 ****
--- 7897,7903 ----
| STDIN
| STDOUT
| STORAGE
+ | SYMMETRIC
| SYSID
| STRICT_P
| TABLESPACE
Index: src/backend/parser/keywords.c
===================================================================
RCS file: /cvsroot/pgsql/src/backend/parser/keywords.c,v
retrieving revision 1.155
diff -c -c -r1.155 keywords.c
*** src/backend/parser/keywords.c 7 May 2005 02:22:47 -0000 1.155
--- src/backend/parser/keywords.c 14 Jun 2005 23:46:24 -0000
***************
*** 49,54 ****
--- 49,55 ----
{"asc", ASC},
{"assertion", ASSERTION},
{"assignment", ASSIGNMENT},
+ {"asymmetric", ASYMMETRIC},
{"at", AT},
{"authorization", AUTHORIZATION},
{"backward", BACKWARD},
***************
*** 296,301 ****
--- 297,303 ----
{"storage", STORAGE},
{"strict", STRICT_P},
{"substring", SUBSTRING},
+ {"symmetric", SYMMETRIC},
{"sysid", SYSID},
{"table", TABLE},
{"tablespace", TABLESPACE},