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Check that a unique index uses the default collation sequences for each column before using it as part of a foreign key constraint operation.

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FossilOrigin-Name: 64154174cf8a53bd9be818db53cb0e586c5d24cb
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dan
2009-09-29 15:41:57 +00:00
parent 792e92012f
commit 9707c7b104
4 changed files with 79 additions and 18 deletions
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18
src/fkey.c
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@@ -241,10 +241,24 @@ static int locateFkeyIndex(
}else{
/* If zKey is non-NULL, then this foreign key was declared to
** map to an explicit list of columns in table pParent. Check if this
** index matches those columns. */
** index matches those columns. Also, check that the index uses
** the default collation sequences for each column. */
int i, j;
for(i=0; i<nCol; i++){
char *zIdxCol = pParent->aCol[pIdx->aiColumn[i]].zName;
int iCol = pIdx->aiColumn[i]; /* Index of column in parent tbl */
char *zDfltColl; /* Def. collation for column */
char *zIdxCol; /* Name of indexed column */
/* If the index uses a collation sequence that is different from
** the default collation sequence for the column, this index is
** unusable. Bail out early in this case. */
zDfltColl = pParent->aCol[iCol].zColl;
if( !zDfltColl ){
zDfltColl = "BINARY";
}
if( sqlite3StrICmp(pIdx->azColl[i], zDfltColl) ) break;
zIdxCol = pParent->aCol[iCol].zName;
for(j=0; j<nCol; j++){
if( sqlite3StrICmp(pFKey->aCol[j].zCol, zIdxCol)==0 ){
if( aiCol ) aiCol[i] = pFKey->aCol[j].iFrom;