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Enabling automatic primary key detection for self-referencing 

FOREIGN KEY constraint during CREATE TABLE. Tnx to Stephan.

Jan
This commit is contained in:
Jan Wieck 2000-02-05 00:20:38 +00:00
parent 582ec175c9
commit ad15560573
1 changed files with 28 additions and 3 deletions
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31
src/backend/parser/analyze.c
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: analyze.c,v 1.135 2000/02/04 18:49:32 wieck Exp $
* $Id: analyze.c,v 1.136 2000/02/05 00:20:38 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -967,11 +967,36 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
/*
* If the attribute list for the referenced table was
* omitted, lookup for the definition of the primary key
* omitted, lookup for the definition of the primary key.
* If the referenced table is this table, use the definition
* we found above, rather than looking to the system
* tables.
*
*/
if (fkconstraint->fk_attrs != NIL && fkconstraint->pk_attrs == NIL)
transformFkeyGetPrimaryKey(fkconstraint);
if (strcmp(fkconstraint->pktable_name, stmt->relname) != 0)
transformFkeyGetPrimaryKey(fkconstraint);
else if (pkey != NULL)
{
List *pkey_attr = pkey->indexParams;
List *attr;
IndexElem *ielem;
Ident *pkattr;
foreach (attr, pkey_attr)
{
ielem = lfirst(attr);
pkattr = (Ident *)makeNode(Ident);
pkattr->name = pstrdup(ielem->name);
pkattr->indirection = NIL;
pkattr->isRel = false;
fkconstraint->pk_attrs = lappend(fkconstraint->pk_attrs, pkattr);
}
}
else {
elog(ERROR, "PRIMARY KEY for referenced table \"%s\" not found",
fkconstraint->pktable_name);
}
/*
* Build a CREATE CONSTRAINT TRIGGER statement for the CHECK