[DRILL-4720] MINDIR() and IMINDIR() functions return no results with metadata cache

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.0
• Fix Version/s: 1.11.0
• Component/s: Functions - Drill
• Labels: ready-to-commit
• Assignee: Arina Ielchiieva
• Reporter: Krystal
• Reviewer: Parth Chandra
• Created: 13/Jun/16 20:59
• Updated: 21/Jul/17 17:31
• Resolved: 21/Jul/17 17:31

Description

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:

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

Here is the plan for the same query against the same directory structure without meta data cache:

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

Issue Links

• links to: GitHub Pull Request #864