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https://issues.apache.org/jira/browse/DRILL-2262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326456#comment-14326456
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Ramana Inukonda Nagaraj edited comment on DRILL-2262 at 2/20/15 6:17 PM:
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Interestingly, the complex reader reads these columns from the file just fine.
It does fail on other columns due to 2266,2220 but does not seem to have a
problem with these particular datatypes.
was (Author: inramana):
Interestingly, the complex reader reads these columns from the file just fine.
It does fail on other columns due to 2266,2229 but does not seem to have a
problem with these particular datatypes.
> selecting columns of certain datatypes from a dictionary encoded parquet file
> created by drill fails
> -----------------------------------------------------------------------------------------------------
>
> Key: DRILL-2262
> URL: https://issues.apache.org/jira/browse/DRILL-2262
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Parquet
> Reporter: Ramana Inukonda Nagaraj
> Assignee: Deneche A. Hakim
> Priority: Critical
> Attachments: 0_0_0.parquet
>
>
> After creating a parquet file containing all datatypes using CTAS from drill
> certain columns are not readable by doing a select in drill.
> These datatypes are :
> DECIMAL18_col: OPTIONAL INT64 O:DECIMAL R:0 D:1
> TIME_col: OPTIONAL INT32 O:TIME R:0 D:1
> TIMESTAMP_col: OPTIONAL INT64 O:TIMESTAMP R:0 D:1
> The select from these columns fails with a similar error
> {code}
> 0: jdbc:drill:> select DECIMAL18_col from parquet_all_default limit 1;
> Query failed: RemoteRpcException: Failure while running fragment.,
> org.apache.drill.exec.vector.NullableDecimal18Vector cannot be cast to
> org.apache.drill.exec.vector.NullableBigIntVector [
> 26094858-356a-4128-ba2a-aa1473f74c93 on 10.10.30.167:31010 ]
> [ 26094858-356a-4128-ba2a-aa1473f74c93 on 10.10.30.167:31010 ]
> Error: exception while executing query: Failure while executing query.
> (state=,code=0)
> 0: jdbc:drill:> select TIME_col from parquet_all_default limit 1;
> Query failed: RemoteRpcException: Failure while running fragment.,
> org.apache.drill.exec.vector.NullableTimeVector cannot be cast to
> org.apache.drill.exec.vector.NullableIntVector [
> 8938245b-a3a8-4bf2-8b6a-7e3860c90e8e on 10.10.30.167:31010 ]
> [ 8938245b-a3a8-4bf2-8b6a-7e3860c90e8e on 10.10.30.167:31010 ]
> Error: exception while executing query: Failure while executing query.
> (state=,code=0)
> 0: jdbc:drill:> select TIMESTAMP_col from parquet_all_default limit 1;
> Query failed: RemoteRpcException: Failure while running fragment.,
> org.apache.drill.exec.vector.NullableTimeStampVector cannot be cast to
> org.apache.drill.exec.vector.NullableBigIntVector [
> 5dff5b38-ece7-4159-acfe-78dacb563e20 on 10.10.30.167:31010 ]
> [ 5dff5b38-ece7-4159-acfe-78dacb563e20 on 10.10.30.167:31010 ]
> Error: exception while executing query: Failure while executing query.
> (state=,code=0)
> {code}
> Note: Dictionary encoding is turned on by default as of commit :
> https://github.com/apache/drill/commit/00c08eff2a5de6e4334fb57e952aac9a852c3d37
> After setting session options to turn off dictionary encoding the same
> queries succeed successfully.
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