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Add the xFilter callback to the sqlite3changeset_apply() function. This callback allows the application to accept or reject changes on a per-table basis when applying a changeset.

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FossilOrigin-Name: 282474c42f24f0e66c69b576b72ef8ce764d49e2
This commit is contained in:
dan
2011-07-13 15:21:02 +00:00
parent e437ca5ec0
commit 40368988da
5 changed files with 118 additions and 64 deletions
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79
ext/session/sqlite3session.c
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@ -2756,6 +2756,10 @@ int sqlite3changeset_apply(
sqlite3 *db, /* Apply change to "main" db of this handle */
int nChangeset, /* Size of changeset in bytes */
void *pChangeset, /* Changeset blob */
int(*xFilter)(
void *pCtx, /* Copy of sixth arg to _apply() */
const char *zTab /* Table name */
),
int(*xConflict)(
void *pCtx, /* Copy of fifth arg to _apply() */
int eConflict, /* DATA, MISSING, CONFLICT, CONSTRAINT */
@ -2788,7 +2792,6 @@ int sqlite3changeset_apply(
if( zTab==0 || sqlite3_strnicmp(zNew, zTab, nTab+1) ){
u8 *abPK;
schemaMismatch = 0;
sqlite3_free((char*)sApply.azCol); /* cast works around VC++ bug */
sqlite3_finalize(sApply.pDelete);
sqlite3_finalize(sApply.pUpdate);
@ -2797,40 +2800,50 @@ int sqlite3changeset_apply(
memset(&sApply, 0, sizeof(sApply));
sApply.db = db;
sqlite3changeset_pk(pIter, &abPK, 0);
rc = sessionTableInfo(
db, "main", zNew, &sApply.nCol, &zTab, &sApply.azCol, &sApply.abPK
);
if( rc!=SQLITE_OK ) break;
if( sApply.nCol==0 ){
schemaMismatch = 1;
sqlite3_log(SQLITE_SCHEMA,
"sqlite3changeset_apply(): no such table: %s", zTab
/* If an xFilter() callback was specified, invoke it now. If the
** xFilter callback returns zero, skip this table. If it returns
** non-zero, proceed. */
schemaMismatch = (xFilter && (0==xFilter(pCtx, zNew)));
if( schemaMismatch ){
zTab = sqlite3_mprintf("%s", zNew);
nTab = strlen(zTab);
sApply.azCol = (const char **)zTab;
}else{
sqlite3changeset_pk(pIter, &abPK, 0);
rc = sessionTableInfo(
db, "main", zNew, &sApply.nCol, &zTab, &sApply.azCol, &sApply.abPK
);
if( rc!=SQLITE_OK ) break;
if( sApply.nCol==0 ){
schemaMismatch = 1;
sqlite3_log(SQLITE_SCHEMA,
"sqlite3changeset_apply(): no such table: %s", zTab
);
}
else if( sApply.nCol!=nCol ){
schemaMismatch = 1;
sqlite3_log(SQLITE_SCHEMA,
"sqlite3changeset_apply(): table %s has %d columns, expected %d",
zTab, sApply.nCol, nCol
);
}
else if( memcmp(sApply.abPK, abPK, nCol)!=0 ){
schemaMismatch = 1;
sqlite3_log(SQLITE_SCHEMA, "sqlite3changeset_apply(): "
"primary key mismatch for table %s", zTab
);
}
else if(
(rc = sessionSelectRow(db, zTab, &sApply))
|| (rc = sessionUpdateRow(db, zTab, &sApply))
|| (rc = sessionDeleteRow(db, zTab, &sApply))
|| (rc = sessionInsertRow(db, zTab, &sApply))
){
break;
}
nTab = sqlite3Strlen30(zTab);
}
else if( sApply.nCol!=nCol ){
schemaMismatch = 1;
sqlite3_log(SQLITE_SCHEMA,
"sqlite3changeset_apply(): table %s has %d columns, expected %d",
zTab, sApply.nCol, nCol
);
}
else if( memcmp(sApply.abPK, abPK, nCol)!=0 ){
schemaMismatch = 1;
sqlite3_log(SQLITE_SCHEMA,
"sqlite3changeset_apply(): primary key mismatch for table %s", zTab
);
}
else if(
(rc = sessionSelectRow(db, zTab, &sApply))
|| (rc = sessionUpdateRow(db, zTab, &sApply))
|| (rc = sessionDeleteRow(db, zTab, &sApply))
|| (rc = sessionInsertRow(db, zTab, &sApply))
){
break;
}
nTab = sqlite3Strlen30(zTab);
}
/* If there is a schema mismatch on the current table, proceed to the