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Determine the set of constraints applied to a domain at executor

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startup, not in the parser; this allows ALTER DOMAIN to work correctly
with domain constraint operations stored in rules.  Rod Taylor;
code review by Tom Lane.
This commit is contained in:
Tom Lane
2003-02-03 21:15:45 +00:00
parent 464598b637
commit 3752e85bad
24 changed files with 524 additions and 339 deletions
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34
src/include/nodes/execnodes.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: execnodes.h,v 1.92 2003/01/23 05:10:41 tgl Exp $
* $Id: execnodes.h,v 1.93 2003/02/03 21:15:44 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -114,7 +114,7 @@ typedef struct ExprContext
Datum *ecxt_aggvalues; /* precomputed values for Aggref nodes */
bool *ecxt_aggnulls; /* null flags for Aggref nodes */
/* Value to substitute for ConstraintTestValue nodes in expression */
/* Value to substitute for CoerceToDomainValue nodes in expression */
Datum domainValue_datum;
bool domainValue_isNull;
@ -539,15 +539,37 @@ typedef struct CaseWhenState
} CaseWhenState;
/* ----------------
* ConstraintTestState node
* CoerceToDomainState node
* ----------------
*/
typedef struct ConstraintTestState
typedef struct CoerceToDomainState
{
ExprState xprstate;
ExprState *arg; /* input expression */
ExprState *check_expr; /* for CHECK test, a boolean expression */
} ConstraintTestState;
/* Cached list of constraints that need to be checked */
List *constraints; /* list of DomainConstraintState nodes */
} CoerceToDomainState;
/*
* DomainConstraintState - one item to check during CoerceToDomain
*
* Note: this is just a Node, and not an ExprState, because it has no
* corresponding Expr to link to. Nonetheless it is part of an ExprState
* tree, so we give it a name following the xxxState convention.
*/
typedef enum DomainConstraintType
{
DOM_CONSTRAINT_NOTNULL,
DOM_CONSTRAINT_CHECK
} DomainConstraintType;
typedef struct DomainConstraintState
{
NodeTag type;
DomainConstraintType constrainttype; /* constraint type */
char *name; /* name of constraint (for error msgs) */
ExprState *check_expr; /* for CHECK, a boolean expression */
} DomainConstraintState;
/* ----------------------------------------------------------------