Multiple metastore calls for same table and constraints during planning

explain select count(i) from test2 group by j limit 3;

2019-10-17T22:44:49,892  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_table : tbl=hive.default.test2
2019-10-17T22:44:49,908  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_primary_keys : tbl=hive.default.test2
2019-10-17T22:44:49,910  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_foreign_keys : parentdb=null parenttbl=null foreigndb=default foreigntbl=test2
2019-10-17T22:44:49,911  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_unique_constraints : tbl=hive.default.test2
2019-10-17T22:44:49,913  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_not_null_constraints : tbl=hive.default.test2
2019-10-17T22:44:49,979  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_partitions : tbl=hive.default.test2
2019-10-17T22:44:49,997  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_aggr_stats_for: table=hive.default.test2
2019-10-17T22:44:50,014  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_table : tbl=hive.default.test2
2019-10-17T22:44:50,023  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_primary_keys : tbl=hive.default.test2
2019-10-17T22:44:50,024  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_foreign_keys : parentdb=null parenttbl=null foreigndb=default foreigntbl=test2
2019-10-17T22:44:50,025  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_unique_constraints : tbl=hive.default.test2
2019-10-17T22:44:50,026  INFO [812910d4-bc6a-450c-aa8b-3487b4edceab main] HiveMetaStore.audit: ugi=vgarg	ip=unknown-ip-addr	cmd=get_not_null_constraints : tbl=hive.default.test2