Vihang Karajgaonkar created HIVE-24732:
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Summary: CachedStore does not return the fields which are
auto-generated by the database
Key: HIVE-24732
URL: https://issues.apache.org/jira/browse/HIVE-24732
Project: Hive
Issue Type: Bug
Reporter: Vihang Karajgaonkar
It looks like CachedStore directly caches the thrift objects as they are sent
by the client. The general pattern seems to be similar to below:
{noformat}
@Override public void createTable(Table tbl) throws InvalidObjectException,
MetaException {
rawStore.createTable(tbl);
// in case of event based cache update, cache will be updated during commit.
if (canUseEvents) {
return;
}
String catName = normalizeIdentifier(tbl.getCatName());
String dbName = normalizeIdentifier(tbl.getDbName());
String tblName = normalizeIdentifier(tbl.getTableName());
if (!shouldCacheTable(catName, dbName, tblName)) {
return;
}
validateTableType(tbl);
// TODO in case of CachedStore we cache directly the object send by the
client.
// this is problematic since certain fields of the object are populated
// after it is persisted. The cache will not be able to serve those fields
correctly.
sharedCache.addTableToCache(catName, dbName, tblName, tbl);
}
{noformat}
The problem here is that the table id is generated when the table is persisted
in the database. The cachedStore will cache the Table object whose id will be 0.
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