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Finished the Between patch Christopher started.

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Implements between (symmetric / asymmetric) as a node.

Executes the left or right expression once, makes a Const out of the
resulting Datum and executes the >=, <= portions out of the Const sets.

Of course, the parser does a fair amount of preparatory work for this to
happen.

Rod Taylor
This commit is contained in:
Bruce Momjian
2002-07-18 04:41:46 +00:00
parent 7ea5f1d7f1
commit 3e22406ec6
15 changed files with 619 additions and 35 deletions
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3
src/include/nodes/makefuncs.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: makefuncs.h,v 1.37 2002/06/20 20:29:49 momjian Exp $
* $Id: makefuncs.h,v 1.38 2002/07/18 04:41:45 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -57,5 +57,6 @@ extern RelabelType *makeRelabelType(Node *arg, Oid rtype, int32 rtypmod);
extern RangeVar *makeRangeVar(char *schemaname, char *relname);
extern TypeName *makeTypeName(char *typnam);
extern TypeName *makeQualifiedTypeName(List *lst);
#endif /* MAKEFUNC_H */

3
src/include/nodes/nodes.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: nodes.h,v 1.110 2002/07/11 07:39:27 ishii Exp $
* $Id: nodes.h,v 1.111 2002/07/18 04:41:45 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -226,6 +226,7 @@ typedef enum NodeTag
T_GroupClause,
T_NullTest,
T_BooleanTest,
T_BetweenExpr,
T_CaseExpr,
T_CaseWhen,
T_FkConstraint,

21
src/include/nodes/parsenodes.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parsenodes.h,v 1.187 2002/07/16 22:12:20 tgl Exp $
* $Id: parsenodes.h,v 1.188 2002/07/18 04:41:45 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -173,6 +173,25 @@ typedef struct A_Const
TypeName *typename; /* typecast */
} A_Const;
/*
* BetweenExpr - an SQL99 BETWEEN expression
*/
typedef struct BetweenExpr
{
NodeTag type;
Node *expr; /* Expression to check */
Node *lexpr; /* First bound */
Node *rexpr; /* Second bound */
bool not; /* Do we want inverse? */
bool symmetric; /* True if SYMMETRIC, false if ASYMMETRIC */
Oid typeId; /* Information abotu common type */
int16 typeLen;
bool typeByVal;
Expr *gthan;
Expr *lthan;
} BetweenExpr;
/*
* TypeCast - a CAST expression
*