Chun Chang created DRILL-4665: --------------------------------- Summary: Partition pruning not working for hive partitioned table with 'LIKE' and '=' filter Key: DRILL-4665 URL: https://issues.apache.org/jira/browse/DRILL-4665 Project: Apache Drill Issue Type: Bug Components: Query Planning & Optimization, Storage - Hive Affects Versions: 1.6.0 Reporter: Chun Chang
This problem was initially reported by Shankar Mane <shankar.m...@games24x7.com> > Problem: > > 1. In drill, we are using hive partition table. But explain plan (same > query) for like and = operator differs and used all partitions in case of > like operator. > 2. If you see below drill explain plans: Like operator uses *all* > partitions where > = operator uses *only* partition filtered by log_date condition. I reproduced the reported issue. I have a partitioned hive external table with the following schema: {noformat} create external table if not exists lineitem_partitioned ( l_orderkey bigint, l_partkey bigint, l_suppkey bigint, l_linenumber bigint, l_quantity double, l_extendedprice double, l_discount double, l_tax double, l_returnflag string, l_linestatus string, l_shipdate string, l_commitdate string, l_receiptdate string, l_shipinstruct string, l_shipmode string, l_comment string ) partitioned by (year int, month int, day int) STORED AS PARQUET LOCATION '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem'; alter table lineitem_partitioned add partition(year=2015, month=1, day=1) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/1'; alter table lineitem_partitioned add partition(year=2015, month=1, day=2) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/2'; alter table lineitem_partitioned add partition(year=2015, month=1, day=3) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/3'; alter table lineitem_partitioned add partition(year=2015, month=1, day=4) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/4'; alter table lineitem_partitioned add partition(year=2015, month=1, day=5) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/5'; alter table lineitem_partitioned add partition(year=2015, month=1, day=6) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/6'; alter table lineitem_partitioned add partition(year=2015, month=1, day=7) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/7'; alter table lineitem_partitioned add partition(year=2015, month=1, day=8) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/8'; alter table lineitem_partitioned add partition(year=2015, month=1, day=9) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/9'; alter table lineitem_partitioned add partition(year=2015, month=1, day=10) location '/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/10'; {noformat} Without 'LIKE', drill plans right: {noformat} 0: jdbc:drill:schema=dfs.drillTestDir> explain plan for select l_shipdate, l_linestatus, l_shipinstruct, `day` from lineitem_partitioned_db2k_2_999 where `day` = 2 limit 10; +------+------+ | text | json | +------+------+ | 00-00 Screen 00-01 Project(l_shipdate=[$0], l_linestatus=[$1], l_shipinstruct=[$2], day=[$3]) 00-02 SelectionVectorRemover 00-03 Limit(fetch=[10]) 00-04 Limit(fetch=[10]) 00-05 Project(l_shipdate=[$1], l_linestatus=[$0], l_shipinstruct=[$2], day=[$3]) 00-06 Scan(groupscan=[HiveScan [table=Table(dbName:md815_db2k, tableName:lineitem_partitioned_db2k_2_999), columns=[`l_linestatus`, `l_shipdate`, `l_shipinstruct`, `day`], numPartitions=1, partitions= [Partition(values:[2015, 1, 2])], inputDirectories=[maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/2]]]) {noformat} With 'LIKE', pruning is not happening: {noformat} 0: jdbc:drill:schema=dfs.drillTestDir> explain plan for select l_shipdate, l_linestatus, l_shipinstruct, `day` from lineitem_partitioned_db2k_2_999 where `day` = 2 and l_shipinstruct like '%BACK%' limit 10; +------+------+ | text | json | +------+------+ | 00-00 Screen 00-01 Project(l_shipdate=[$0], l_linestatus=[$1], l_shipinstruct=[$2], day=[$3]) 00-02 SelectionVectorRemover 00-03 Limit(fetch=[10]) 00-04 Limit(fetch=[10]) 00-05 Project(l_shipdate=[$1], l_linestatus=[$0], l_shipinstruct=[$2], day=[$3]) 00-06 SelectionVectorRemover 00-07 Filter(condition=[AND(=($3, 2), LIKE($2, '%BACK%'))]) 00-08 Scan(groupscan=[HiveScan [table=Table(dbName:md815_db2k, tableName:lineitem_partitioned_db2k_2_999), columns=[`l_linestatus`, `l_shipdate`, `l_shipinstruct`, `day`], numPartitions=10, partitions= [Partition(values:[2015, 1, 1]), Partition(values:[2015, 1, 10]), Partition(values:[2015, 1, 2]), Partition(values:[2015, 1, 3]), Partition(values:[2015, 1, 4]), Partition(values:[2015, 1, 5]), Partition(values:[2015, 1, 6]), Partition(values:[2015, 1, 7]), Partition(values:[2015, 1, 8]), Partition(values:[2015, 1, 9])], inputDirectories=[maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/1, maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/10, maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/2, maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/3, maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/4, maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/5, maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/6, maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/7, maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/8, maprfs:/drill/testdata/tpch100_dir_partitioned_50000files/lineitem/2015/1/9]]]) {noformat} -- This message was sent by Atlassian JIRA (v6.3.4#6332)