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Posted to dev@hive.apache.org by "Yash Datta (JIRA)" <ji...@apache.org> on 2015/04/10 07:23:13 UTC
[jira] [Created] (HIVE-10296) Cast exception observed when hive
runs a multi join query on metastore (postgres), since postgres pushes the
filter into the join, and ignores the condition before applying cast
Yash Datta created HIVE-10296:
---------------------------------
Summary: Cast exception observed when hive runs a multi join query on metastore (postgres), since postgres pushes the filter into the join, and ignores the condition before applying cast
Key: HIVE-10296
URL: https://issues.apache.org/jira/browse/HIVE-10296
Project: Hive
Issue Type: Bug
Affects Versions: 0.13.1
Reporter: Yash Datta
Try to drop a partition from hive:
ALTER TABLE f___edr_bin_source___900_sub_id DROP IF EXISTS PARTITION ( exporttimestamp=1427824800, timestamp=1427824800)
This triggers a query on the metastore like this :
"select "PARTITIONS"."PART_ID" from "PARTITIONS" inner join "TBLS" on "PARTITIONS"."TBL_ID" = "TBLS"."TBL_ID" and "TBLS"."TBL_NAME" = ? inner join "DBS" on "TBLS"."DB_ID" = "DBS"."DB_ID" and "DBS"."NAME" = ? inner join "PARTITION_KEY_VALS" "FILTER0" on "FILTER0"."PART_ID" = "PARTITIONS"."PART_ID" and "FILTER0"."INTEGER_IDX" = 0 inner join "PARTITION_KEY_VALS" "FILTER1" on "FILTER1"."PART_ID" = "PARTITIONS"."PART_ID" and "FILTER1"."INTEGER_IDX" = 1 where ( (((case when "TBLS"."TBL_NAME" = ? and "DBS"."NAME" = ? then cast("FILTER0"."PART_KEY_VAL" as decimal(21,0)) else null end) = ?) and ((case when "TBLS"."TBL_NAME" = ? and "DBS"."NAME" = ? then cast("FILTER1"."PART_KEY_VAL" as decimal(21,0)) else null end) = ?)) )"
In some cases, when the internal tables in postgres (metastore) have some amount of data, the query plan pushes the condition down into the join.
Now because of DERBY-6358 , case when clause is used before the cast, but in this case , cast is evaluated before condition being evaluated. So in case we have different tables partitioned on string and integer columns, cast exception is observed!
15/04/06 08:41:20 ERROR metastore.ObjectStore: Direct SQL failed, falling back to ORM
javax.jdo.JDODataStoreException: Error executing SQL query "select "PARTITIONS"."PART_ID" from "PARTITIONS" inner join "TBLS" on "PARTITIONS"."TBL_ID" = "TBLS"."TBL_ID" and "TBLS"."TBL_NAME" = ? inner join "DBS" on "TBLS"."DB_ID" = "DBS"."DB_ID" and "DBS"."NAME" = ? inner join "PARTITION_KEY_VALS" "FILTER0" on "FILTER0"."PART_ID" = "PARTITIONS"."PART_ID" and "FILTER0"."INTEGER_IDX" = 0 inner join "PARTITION_KEY_VALS" "FILTER1" on "FILTER1"."PART_ID" = "PARTITIONS"."PART_ID" and "FILTER1"."INTEGER_IDX" = 1 where ( (((case when "TBLS"."TBL_NAME" = ? and "DBS"."NAME" = ? then cast("FILTER0"."PART_KEY_VAL" as decimal(21,0)) else null end) = ?) and ((case when "TBLS"."TBL_NAME" = ? and "DBS"."NAME" = ? then cast("FILTER1"."PART_KEY_VAL" as decimal(21,0)) else null end) = ?)) )".
at org.datanucleus.api.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:451)
at org.datanucleus.api.jdo.JDOQuery.executeWithArray(JDOQuery.java:321)
at org.apache.hadoop.hive.metastore.MetaStoreDirectSql.getPartitionsViaSqlFilterInternal(MetaStoreDirectSql.java:300)
at org.apache.hadoop.hive.metastore.MetaStoreDirectSql.getPartitionsViaSqlFilter(MetaStoreDirectSql.java:211)
at org.apache.hadoop.hive.metastore.ObjectStore$3.getSqlResult(ObjectStore.java:1915)
at org.apache.hadoop.hive.metastore.ObjectStore$3.getSqlResult(ObjectStore.java:1909)
at org.apache.hadoop.hive.metastore.ObjectStore$GetHelper.run(ObjectStore.java:2208)
at org.apache.hadoop.hive.metastore.ObjectStore.getPartitionsByExprInternal(ObjectStore.java:1909)
at org.apache.hadoop.hive.metastore.ObjectStore.getPartitionsByExpr(ObjectStore.java:1882)
org.postgresql.util.PSQLException: ERROR: invalid input syntax for type numeric: "__DEFAULT_BINSRC__"
15/04/06 08:41:20 INFO metastore.ObjectStore: JDO filter pushdown cannot be used: Filtering is supported only on partition keys of type string
15/04/06 08:41:20 ERROR metastore.ObjectStore:
javax.jdo.JDOException: Exception thrown when executing query
at org.datanucleus.api.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:596)
at org.datanucleus.api.jdo.JDOQuery.execute(JDOQuery.java:275)
at org.apache.hadoop.hive.metastore.ObjectStore.getPartitionNamesNoTxn(ObjectStore.java:1700)
at org.apache.hadoop.hive.metastore.ObjectStore.getPartitionNamesPrunedByExprNoTxn(ObjectStore.java:2003)
at org.apache.hadoop.hive.metastore.ObjectStore.access$400(ObjectStore.java:146)
at org.apache.hadoop.hive.metastore.ObjectStore$3.getJdoResult(ObjectStore.java:1937)
at org.apache.hadoop.hive.metastore.ObjectStore$3.getJdoResult(ObjectStore.java:1909)
at org.apache.hadoop.hive.metastore.ObjectStore$GetHelper.run(ObjectStore.java:2214)
at org.apache.hadoop.hive.metastore.ObjectStore.getPartitionsByExprInternal(ObjectStore.java:1909)
at org.apache.hadoop.hive.metastore.ObjectStore.getPartitionsByExpr(ObjectStore.java:1882)
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