Fix pool_table_name_to_oid in case new to_regclass used which is introduced in PostgreSQL 9.4.
Fix pool_table_name_to_oid in case new to_regclass used which is introduced in PostgreSQL 9.4.

The relcache func used here should return 0 if target table is not
found. However to_regclass returns NULL in this case. To fix the
problem now COALESCE is used.

treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres