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Repair the check for redundant UNIQUE and PRIMARY KEY indices.

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Also, improve it so that it checks for multi-column constraints.
Thanks to Mark Dalphin <mdalphin@amgen.com> for reporting the problem.
This commit is contained in:
Thomas G. Lockhart 1999-08-15 06:46:49 +00:00
parent 288373f5a4
commit 3cfd56fcf6
1 changed files with 33 additions and 13 deletions

46
src/backend/parser/analyze.c

@ -5,7 +5,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: analyze.c,v 1.116 1999/07/19 00:26:18 tgl Exp $
* $Id: analyze.c,v 1.117 1999/08/15 06:46:49 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@ -579,6 +579,9 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
columns = NIL;
dlist = NIL;
/*
* Run through each primary element in the table creation clause
*/
while (elements != NIL)
{
element = lfirst(elements);
@ -588,6 +591,7 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
column = (ColumnDef *) element;
columns = lappend(columns, column);
/* Special case SERIAL type? */
if (column->is_sequence)
{
char *sname;
@ -625,6 +629,7 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
blist = lcons(sequence, NIL);
}
/* Check for column constraints, if any... */
if (column->constraints != NIL)
{
clist = column->constraints;
@ -815,28 +820,43 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
* or if a SERIAL column was defined along with a table PRIMARY KEY constraint.
* - thomas 1999-05-11
*/
if ((pkey != NULL) && (length(lfirst(pkey->indexParams)) == 1))
if (pkey != NULL)
{
dlist = ilist;
ilist = NIL;
while (dlist != NIL)
{
int keep = TRUE;
List *pcols, *icols;
int plen, ilen;
int keep = TRUE;
index = lfirst(dlist);
pcols = pkey->indexParams;
icols = index->indexParams;
/*
* has a single column argument, so might be a conflicting
* index...
*/
if ((index != pkey)
&& (length(index->indexParams) == 1))
plen = length(pcols);
ilen = length(icols);
/* Not the same as the primary key? Then we should look... */
if ((index != pkey) && (ilen == plen))
{
char *pname = ((IndexElem *) lfirst(index->indexParams))->name;
char *iname = ((IndexElem *) lfirst(index->indexParams))->name;
keep = FALSE;
while ((pcols != NIL) && (icols != NIL))
{
IndexElem *pcol = lfirst(pcols);
IndexElem *icol = lfirst(icols);
char *pname = pcol->name;
char *iname = icol->name;
/* same names? then don't keep... */
keep = (strcmp(iname, pname) != 0);
/* different names? then no match... */
if (strcmp(iname, pname) != 0)
{
keep = TRUE;
break;
}
pcols = lnext(pcols);
icols = lnext(icols);
}
}
if (keep)