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Experimental change to the handling of foreign key constraint violations when applying a changeset: all foreign keys, immediate and deferred, are deferred until the end of the transaction (or sub-transaction) opened by the sqlite3changeset_apply(). A single call to the conflict-handler (if any) is made if any FK constraint violations are still present in the database at this point. The conflict-handler may choose to rollback the changeset, or to apply it, constraint violations and all.

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FossilOrigin-Name: 1d44e5d3c2b1dc958442f9114a960b256e002ed3
This commit is contained in:
dan
2013-07-03 19:53:05 +00:00
parent 35e2858e98
commit cb3e4b797e
16 changed files with 391 additions and 136 deletions
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6
src/vdbeapi.c
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@@ -386,7 +386,9 @@ static int sqlite3Step(Vdbe *p){
db->u1.isInterrupted = 0;
}
assert( db->writeVdbeCnt>0 || db->autoCommit==0 || db->nDeferredCons==0 );
assert( db->writeVdbeCnt>0 || db->autoCommit==0
|| (db->nDeferredCons==0 && db->nDeferredImmCons==0)
);
#ifndef SQLITE_OMIT_TRACE
if( db->xProfile && !db->init.busy ){
@@ -1496,3 +1498,5 @@ int sqlite3_preupdate_new(sqlite3 *db, int iIdx, sqlite3_value **ppValue){
return sqlite3ApiExit(db, rc);
}
#endif /* SQLITE_ENABLE_PREUPDATE_HOOK */
int sqlite3_foreign_key_check(sqlite3 *db){ return db->nDeferredImmCons; }