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Prototype for PRAGMA that checks all foreign key constraints on a table.

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FossilOrigin-Name: 01c980e9bbdf82e0b37667b6403c19ed8c73ee62
This commit is contained in:
drh
2012-12-17 16:46:37 +00:00
parent 6d42097622
commit 6c5b915fcb
5 changed files with 112 additions and 15 deletions
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12
src/fkey.c
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@@ -142,7 +142,7 @@
** A foreign key constraint requires that the key columns in the parent
** table are collectively subject to a UNIQUE or PRIMARY KEY constraint.
** Given that pParent is the parent table for foreign key constraint pFKey,
** search the schema a unique index on the parent key columns.
** search the schema for a unique index on the parent key columns.
**
** If successful, zero is returned. If the parent key is an INTEGER PRIMARY
** KEY column, then output variable *ppIdx is set to NULL. Otherwise, *ppIdx
@@ -178,7 +178,7 @@
** into pParse. If an OOM error occurs, non-zero is returned and the
** pParse->db->mallocFailed flag is set.
*/
static int locateFkeyIndex(
int sqlite3FkLocateIndex(
Parse *pParse, /* Parse context to store any error in */
Table *pParent, /* Parent table of FK constraint pFKey */
FKey *pFKey, /* Foreign key to find index for */
@@ -736,7 +736,7 @@ void sqlite3FkCheck(
}else{
pTo = sqlite3LocateTable(pParse, 0, pFKey->zTo, zDb);
}
if( !pTo || locateFkeyIndex(pParse, pTo, pFKey, &pIdx, &aiFree) ){
if( !pTo || sqlite3FkLocateIndex(pParse, pTo, pFKey, &pIdx, &aiFree) ){
assert( isIgnoreErrors==0 || (regOld!=0 && regNew==0) );
if( !isIgnoreErrors || db->mallocFailed ) return;
if( pTo==0 ){
@@ -816,7 +816,7 @@ void sqlite3FkCheck(
continue;
}
if( locateFkeyIndex(pParse, pTab, pFKey, &pIdx, &aiCol) ){
if( sqlite3FkLocateIndex(pParse, pTab, pFKey, &pIdx, &aiCol) ){
if( !isIgnoreErrors || db->mallocFailed ) return;
continue;
}
@@ -871,7 +871,7 @@ u32 sqlite3FkOldmask(
}
for(p=sqlite3FkReferences(pTab); p; p=p->pNextTo){
Index *pIdx = 0;
locateFkeyIndex(pParse, pTab, p, &pIdx, 0);
sqlite3FkLocateIndex(pParse, pTab, p, &pIdx, 0);
if( pIdx ){
for(i=0; i<pIdx->nColumn; i++) mask |= COLUMN_MASK(pIdx->aiColumn[i]);
}
@@ -997,7 +997,7 @@ static Trigger *fkActionTrigger(
int i; /* Iterator variable */
Expr *pWhen = 0; /* WHEN clause for the trigger */
if( locateFkeyIndex(pParse, pTab, pFKey, &pIdx, &aiCol) ) return 0;
if( sqlite3FkLocateIndex(pParse, pTab, pFKey, &pIdx, &aiCol) ) return 0;
assert( aiCol || pFKey->nCol==1 );
for(i=0; i<pFKey->nCol; i++){