Denys Ordynskiy created DRILL-6465:
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Summary: Transitive closure is not working in Drill for Join with
multiple local conditions
Key: DRILL-6465
URL: https://issues.apache.org/jira/browse/DRILL-6465
Project: Apache Drill
Issue Type: Bug
Affects Versions: 1.14.0
Environment: [^drill.zip]
Reporter: Denys Ordynskiy
Attachments: drill.zip
For several SQL operators Transitive closure is not working during Partition
Pruning and Filter Pushdown for the left table in Join.
If I use several local conditions, then Drill scans full left table in Join.
But if we move additional conditions to the WHERE statement, then Transitive
closure works fine for all joined tables
*Query BETWEEN:*
{code:java}
EXPLAIN PLAN FOR
SELECT * FROM hive.`h_tab1` t1
JOIN hive.`h_tab2` t2
ON t1.y=t2.y
AND t2.y BETWEEN 1987 AND 1988;
{code}
*Expected result:*
{code:java}
Scan(groupscan=[HiveScan [table=Table(dbName:default, tableName:h_tab1),
columns=[`**`], numPartitions=8, partitions= [Partition(values:[1987, 5, 1]),
Partition(values:[1987, 5, 2]), Partition(values:[1987, 7, 1]),
Partition(values:[1987, 7, 2]), Partition(values:[1988, 11, 1]),
Partition(values:[1988, 11, 2]), Partition(values:[1988, 12, 1]),
Partition(values:[1988, 12, 2])]{code}
*Actual result:*
{code:java}
Scan(groupscan=[HiveScan [table=Table(dbName:default, tableName:h_tab1),
columns=[`**`], numPartitions=16, partitions= [Partition(values:[1987, 5, 1]),
Partition(values:[1987, 5, 2]), Partition(values:[1987, 7, 1]),
Partition(values:[1987, 7, 2]), Partition(values:[1988, 11, 1]),
Partition(values:[1988, 11, 2]), Partition(values:[1988, 12, 1]),
Partition(values:[1988, 12, 2]), Partition(values:[1990, 4, 1]),
Partition(values:[1990, 4, 2]), Partition(values:[1990, 5, 1]),
Partition(values:[1990, 5, 2]), Partition(values:[1991, 3, 1]),
Partition(values:[1991, 3, 2]), Partition(values:[1991, 3, 3]),
Partition(values:[1991, 3, 4])
]
{code}
*There is the same Transitive closure behavior for this logical operators:*
* NOT IN
* LIKE
* NOT LIKE
Also Transitive closure is not working during Partition Pruning and Filter
Pushdown for this comparison operators:
*Query <*
{code:java}
EXPLAIN PLAN FOR
SELECT * FROM hive.`h_tab1` t1
JOIN hive.`h_tab2` t2
ON t1.y=t2.y
AND t2.y < 1988;
{code}
*Expected result:*
{code:java}
Scan(groupscan=[HiveScan [table=Table(dbName:default, tableName:h_tab1),
columns=[`**`], numPartitions=4, partitions= [Partition(values:[1987, 5, 1]),
Partition(values:[1987, 5, 2]), Partition(values:[1987, 7, 1]),
Partition(values:[1987, 7, 2])]{code}
*Actual result:*
{code:java}
Scan(groupscan=[HiveScan [table=Table(dbName:default, tableName:h_tab1),
columns=[`**`], numPartitions=16, partitions= [Partition(values:[1987, 5, 1]),
Partition(values:[1987, 5, 2]), Partition(values:[1987, 7, 1]),
Partition(values:[1987, 7, 2]), Partition(values:[1988, 11, 1]),
Partition(values:[1988, 11, 2]), Partition(values:[1988, 12, 1]),
Partition(values:[1988, 12, 2]), Partition(values:[1990, 4, 1]),
Partition(values:[1990, 4, 2]), Partition(values:[1990, 5, 1]),
Partition(values:[1990, 5, 2]), Partition(values:[1991, 3, 1]),
Partition(values:[1991, 3, 2]), Partition(values:[1991, 3, 3]),
Partition(values:[1991, 3, 4])]
{code}
*There is the same Transitive closure behavior for this comparison operators:***
>, <=, >=, <>
But if I use the WHERE clause instead of local Join condition, Transitive
closure works correct for all joined tables.
*Query:*
{code:java}
EXPLAIN PLAN FOR
SELECT * FROM hive.`h_tab1` t1
JOIN hive.`h_tab2` t2
ON t1.y=t2.y
WHERE t2.y < 1988;
{code}
*Result:*
{code:java}
Scan(groupscan=[HiveScan [table=Table(dbName:default, tableName:h_tab1),
columns=[`**`], numPartitions=4, partitions= [Partition(values:[1987, 5, 1]),
Partition(values:[1987, 5, 2]), Partition(values:[1987, 7, 1]),
Partition(values:[1987, 7, 2])]
{code}
It was examples for Drill Partition Pruning queries with hive. The same issues
are in the Drill Filter Pushdown queries.
*Filter Pushdown 'BETWEEN' query example:*
{code:java}
EXPLAIN PLAN FOR
SELECT * FROM dfs.ctas_parquet.`/DRILL_6173_pushdown/tab1` t1
JOIN dfs.ctas_parquet.`/DRILL_6173_pushdown/tab2` t2
ON t1.y=t2.y
AND t2.y BETWEEN 1987 AND 1988;
{code}
*Expected result:*
{code:java}
Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath
[path=/drill/testdata/ctas/parquet/DRILL_6173_pushdown/tab1/0_0_7.parquet],
ReadEntryWithPath
...
ReadEntryWithPath
[path=/drill/testdata/ctas/parquet/DRILL_6173_pushdown/tab1/0_0_6.parquet]],
selectionRoot=maprfs:/drill/testdata/ctas/parquet/DRILL_6173_pushdown/tab1,
numFiles=8, numRowGroups=8
{code}
*Actual result:*
{code:java}
Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath
[path=maprfs:///drill/testdata/ctas/parquet/DRILL_6173_pushdown/tab1]],
selectionRoot=maprfs:/drill/testdata/ctas/parquet/DRILL_6173_pushdown/tab1,
numFiles=1, numRowGroups=16
{code}
Issues can be reproduced using parquet files in the attachment "drill.zip"
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