[TAJO-897] PartitionedTableRewriter is repeated several times with same table.

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.9.0
• Assignee: Hyoungjun Kim
• Reporter: Hyoungjun Kim
• Created: 01/Jul/14 14:39
• Updated: 07/Jul/14 02:58
• Resolved: 07/Jul/14 02:46

Description

See the title.
If there is some block which contains partitioned table, PartitionedTableRewriter runs several time. At first time after finding partition path, PartitionedTableRewriter removes partitioned filter condition. So next time all partition is selected for scanning.
I ran the next query. customer_parts table is partitioned by c_nationkey.

select a.c_custkey, b.c_custkey from 
 (select c_custkey, c_nationkey from customer_parts where c_nationkey < 0 
 union all 
  select c_custkey, c_nationkey from customer_parts where c_nationkey < 0 
) a
left outer join customer_parts b
on a.c_custkey = b.c_custkey 
and a.c_nationkey > 0

=======================================================
Block Id: eb_1404224996147_0002_000001 [LEAF]
=======================================================

[Outgoing]
[q_1404224996147_0002] 1 => 3 (type=HASH_SHUFFLE, key=default.a.c_custkey (INT4), num=32)

TABLE_SUBQUERY(19) as default.a
  => Targets: default.a.c_custkey (INT4) as default.a.c_custkey
  => out schema: {(1) default.a.c_custkey (INT4)}
  => in  schema: {(2) default.a.c_custkey (INT4),default.a.c_nationkey (INT4)}
   PARTITIONS_SCAN(16) on default.customer_parts
     => target list: default.customer_parts.c_custkey (INT4), default.customer_parts.c_nationkey (INT4)
     => num of filtered paths: 5
     => out schema: {(2) default.customer_parts.c_custkey (INT4),default.customer_parts.c_nationkey (INT4)}
     => in schema: {(7) default.customer_parts.c_custkey (INT4),default.customer_parts.c_name (TEXT),default.customer_parts.c_address (TEXT),default.customer_parts.c_phone (TEXT),default.customer_parts.c_acctbal (FLOAT8),default.customer_parts.c_mktsegment (TEXT),default.customer_parts.c_comment (TEXT)}
     => 0: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=1
     => 1: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=13
     => 2: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=15
     => 3: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=3
     => 4: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=4

=======================================================
Block Id: eb_1404224996147_0002_000002 [LEAF]
=======================================================

[Outgoing]
[q_1404224996147_0002] 2 => 3 (type=HASH_SHUFFLE, key=default.a.c_custkey (INT4), num=32)

TABLE_SUBQUERY(20) as default.a
  => Targets: default.a.c_custkey (INT4)
  => out schema: {(1) default.a.c_custkey (INT4)}
  => in  schema: {(2) default.a.c_custkey (INT4),default.a.c_nationkey (INT4)}
   PARTITIONS_SCAN(17) on default.customer_parts
     => target list: default.customer_parts.c_custkey (INT4), default.customer_parts.c_nationkey (INT4)
     => num of filtered paths: 5
     => out schema: {(2) default.customer_parts.c_custkey (INT4),default.customer_parts.c_nationkey (INT4)}
     => in schema: {(7) default.customer_parts.c_custkey (INT4),default.customer_parts.c_name (TEXT),default.customer_parts.c_address (TEXT),default.customer_parts.c_phone (TEXT),default.customer_parts.c_acctbal (FLOAT8),default.customer_parts.c_mktsegment (TEXT),default.customer_parts.c_comment (TEXT)}
     => 0: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=1
     => 1: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=13
     => 2: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=15
     => 3: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=3
     => 4: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=4

=======================================================
Block Id: eb_1404224996147_0002_000004 [LEAF]
=======================================================

[Outgoing]
[q_1404224996147_0002] 4 => 3 (type=HASH_SHUFFLE, key=default.b.c_custkey (INT4), num=32)

PARTITIONS_SCAN(15) on default.customer_parts
  => target list: default.b.c_custkey (INT4)
  => num of filtered paths: 5
  => out schema: {(1) default.b.c_custkey (INT4)}
  => in schema: {(7) default.b.c_custkey (INT4),default.b.c_name (TEXT),default.b.c_address (TEXT),default.b.c_phone (TEXT),default.b.c_acctbal (FLOAT8),default.b.c_mktsegment (TEXT),default.b.c_comment (TEXT)}
  => 0: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=1
  => 1: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=13
  => 2: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=15
  => 3: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=3
  => 4: hdfs://localhost:49896/tajo/warehouse/default/customer_parts/c_nationkey=4

=======================================================
Block Id: eb_1404224996147_0002_000003 [ROOT]
=======================================================