Krystal created DRILL-4720:
------------------------------
Summary: MINDIR() and IMINDIR() functions return no results with
metadata cache
Key: DRILL-4720
URL: https://issues.apache.org/jira/browse/DRILL-4720
Project: Apache Drill
Issue Type: Bug
Components: Functions - Drill
Affects Versions: 1.7.0
Reporter: Krystal
Parquet directories with meta data cache return 0 rows for MINDIR and IMINDIR
functions.
hadoop fs -ls /tmp/querylogs_4
Found 6 items
-rwxr-xr-x 3 mapr mapr 15406 2016-06-13 10:18
/tmp/querylogs_4/.drill.parquet_metadata
drwxr-xr-x - root root 4 2016-06-13 10:18 /tmp/querylogs_4/1985
drwxr-xr-x - root root 3 2016-06-13 10:18 /tmp/querylogs_4/1999
drwxr-xr-x - root root 3 2016-06-13 10:18 /tmp/querylogs_4/2005
drwxr-xr-x - root root 4 2016-06-13 10:18 /tmp/querylogs_4/2014
drwxr-xr-x - root root 6 2016-06-13 10:18 /tmp/querylogs_4/2016
hadoop fs -ls /tmp/querylogs_4/1985
Found 4 items
-rwxr-xr-x 3 mapr mapr 3634 2016-06-13 10:18
/tmp/querylogs_4/1985/.drill.parquet_metadata
drwxr-xr-x - root root 2 2016-06-13 10:18 /tmp/querylogs_4/1985/Feb
drwxr-xr-x - root root 2 2016-06-13 10:18 /tmp/querylogs_4/1985/apr
drwxr-xr-x - root root 2 2016-06-13 10:18 /tmp/querylogs_4/1985/jan
SELECT * FROM `dfs.tmp`.`querylogs_4` WHERE dir0 =
MINDIR('dfs.tmp','querylogs_4');
+-----------+-------+------+---------------+----------------+------------+------------+-------+-------+-------+
| voter_id | name | age | registration | contributions | voterzone |
date_time | dir0 | dir1 | dir2 |
+-----------+-------+------+---------------+----------------+------------+------------+-------+-------+-------+
+-----------+-------+------+---------------+----------------+------------+------------+-------+-------+-------+
No rows selected (0.803 seconds)
If the meta cache is removed, expected data is returned.
Here is the physical plan:
{code}
00-00 Screen : rowType = RecordType(ANY *): rowcount = 3.75, cumulative cost
= {54.125 rows, 169.125 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 664191
00-01 Project(*=[$0]) : rowType = RecordType(ANY *): rowcount = 3.75,
cumulative cost = {53.75 rows, 168.75 cpu, 0.0 io, 0.0 network, 0.0 memory}, id
= 664190
00-02 Project(T51¦¦*=[$0]) : rowType = RecordType(ANY T51¦¦*): rowcount
= 3.75, cumulative cost = {53.75 rows, 168.75 cpu, 0.0 io, 0.0 network, 0.0
memory}, id = 664189
00-03 SelectionVectorRemover : rowType = RecordType(ANY T51¦¦*, ANY
dir0): rowcount = 3.75, cumulative cost = {53.75 rows, 168.75 cpu, 0.0 io, 0.0
network, 0.0 memory}, id = 664188
00-04 Filter(condition=[=($1, '.drill.parquet_metadata')]) : rowType
= RecordType(ANY T51¦¦*, ANY dir0): rowcount = 3.75, cumulative cost = {50.0
rows, 165.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 664187
00-05 Project(T51¦¦*=[$0], dir0=[$1]) : rowType = RecordType(ANY
T51¦¦*, ANY dir0): rowcount = 25.0, cumulative cost = {25.0 rows, 50.0 cpu, 0.0
io, 0.0 network, 0.0 memory}, id = 664186
00-06 Scan(groupscan=[ParquetGroupScan
[entries=[ReadEntryWithPath
[path=/tmp/querylogs_4/2005/May/voter25.parquet/0_0_0.parquet]],
selectionRoot=/tmp/querylogs_4, numFiles=1, usedMetadataFile=true,
columns=[`*`]]]) : rowType = (DrillRecordRow[*, dir0]): rowcount = 25.0,
cumulative cost = {25.0 rows, 50.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id =
664185
{code}
Here is the plan for the same query against the same directory structure
without meta data cache:
{code}
00-00 Screen : rowType = RecordType(ANY *): rowcount = 75.0, cumulative cost
= {82.5 rows, 157.5 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 664312
00-01 Project(*=[$0]) : rowType = RecordType(ANY *): rowcount = 75.0,
cumulative cost = {75.0 rows, 150.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id =
664311
00-02 Project(*=[$0]) : rowType = RecordType(ANY *): rowcount = 75.0,
cumulative cost = {75.0 rows, 150.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id =
664310
00-03 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath
[path=maprfs:///tmp/querylogs_1/1985/Feb/voter10.parquet/0_0_0.parquet],
ReadEntryWithPath
[path=maprfs:///tmp/querylogs_1/1985/jan/voter5.parquet/0_0_0.parquet],
ReadEntryWithPath
[path=maprfs:///tmp/querylogs_1/1985/apr/voter65.parquet/0_0_0.parquet]],
selectionRoot=maprfs:/tmp/querylogs_1, numFiles=3, usedMetadataFile=false,
columns=[`*`]]]) : rowType = (DrillRecordRow[*, dir0]): rowcount = 75.0,
cumulative cost = {75.0 rows, 150.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id =
664309
{code}
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