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https://issues.apache.org/jira/browse/DRILL-4985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15624610#comment-15624610
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Khurram Faraaz commented on DRILL-4985:
---------------------------------------
Parquet schema details for tables t1 and t2.
{noformat}
[root@centos-01 drill4985]# ~/parquet-tools/parquet-schema t1/0_0_0.parquet
message root {
optional int32 col_int;
optional binary col_chr (UTF8);
optional binary col_vrchr1 (UTF8);
optional binary col_vrchr2 (UTF8);
optional int32 col_dt (DATE);
optional int32 col_tim (TIME_MILLIS);
optional int64 col_tmstmp (TIMESTAMP_MILLIS);
optional float col_flt;
optional fixed_len_byte_array(12) col_intrvl_yr (INTERVAL);
optional fixed_len_byte_array(12) col_intrvl_day (INTERVAL);
optional boolean col_bln;
}
{noformat}
{noformat}
[root@centos-01 drill4985]# ~/parquet-tools/parquet-schema t2/0_0_0.parquet
message root {
optional int32 col_int;
optional binary col_chr (UTF8);
optional binary col_vrchr1 (UTF8);
optional binary col_vrchr2 (UTF8);
optional int32 col_dt (DATE);
optional int32 col_tim (TIME_MILLIS);
optional int64 col_tmstmp (TIMESTAMP_MILLIS);
optional float col_flt;
optional fixed_len_byte_array(12) col_intrvl_yr (INTERVAL);
optional fixed_len_byte_array(12) col_intrvl_day (INTERVAL);
optional boolean col_bln;
}
{noformat}
> CAST in join predicate in null equality join - "query cannot be planned error"
> ------------------------------------------------------------------------------
>
> Key: DRILL-4985
> URL: https://issues.apache.org/jira/browse/DRILL-4985
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.9.0
> Reporter: Khurram Faraaz
>
> Use of CAST in join predicate results in, "query cannot be planned error", in
> a Null Equality Join.
> Drill 1.9.0, git commit ID: a29f1e29
> {noformat}
> 0: jdbc:drill:schema=dfs.tmp> SELECT t1.col_int , t2.col_int FROM typeall_l
> t1, typeall_r t2 WHERE CAST(t1.col_int AS BIGINT)= CAST(t2.col_int AS BIGINT)
> OR ( t1.col_int IS NULL AND t2.col_int IS NULL );
> Error: UNSUPPORTED_OPERATION ERROR: This query cannot be planned possibly due
> to either a cartesian join or an inequality join
> [Error Id: 10452a20-c0a7-45b1-8ee7-065b28484738 on centos-01.qa.lab:31010]
> (state=,code=0)
> {noformat}
> {noformat}
> 0: jdbc:drill:schema=dfs.tmp> SELECT t1.col_int , t2.col_int FROM typeall_l
> t1, typeall_r t2 WHERE CAST(t1.col_int AS BIGINT)= CAST(t2.col_int AS BIGINT)
> OR ( CAST(t1.col_int AS BIGINT) IS NULL AND CAST(t2.col_int AS BIGINT) IS
> NULL );
> Error: UNSUPPORTED_OPERATION ERROR: This query cannot be planned possibly due
> to either a cartesian join or an inequality join
> [Error Id: ca8eba6c-b8c0-42d9-a0a0-16e94f887280 on centos-01.qa.lab:31010]
> (state=,code=0)
> {noformat}
> Whereas, without the CAST to BIGINT in the join predicate, query returns
> correct results.
> {noformat}
> 0: jdbc:drill:schema=dfs.tmp> SELECT t1.col_int , t2.col_int FROM typeall_l
> t1, typeall_r t2 WHERE t1.col_int = t2.col_int OR ( t1.col_int IS NULL AND
> t2.col_int IS NULL );
> +----------+-----------+
> | col_int | col_int0 |
> +----------+-----------+
> | 30410 | 30410 |
> | 37420 | 37420 |
> | 58583 | 58583 |
> | 1 | 1 |
> | null | null |
> | null | null |
> | null | null |
> | 20326 | 20326 |
> | null | null |
> | null | null |
> | null | null |
> | 19 | 19 |
> | 60718 | 60718 |
> | null | null |
> | null | null |
> | null | null |
> +----------+-----------+
> 16 rows selected (0.304 seconds)
> {noformat}
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