mirror of
https://github.com/apache/impala.git
synced 2026-01-10 09:00:16 -05:00
1a1927b07d
Introduces a new TBLPROPERTY for controlling stats extrapolation on a per-table basis: impala.enable.stats.extrapolation=true/false The property key was chosen to be consistent with the impalad startup flag --enable_stats_extrapolation and to indicate that the property was set and is used by Impala. Behavior: - If the property is not set, then the extrapolation behavior is determined by the impalad startup flag. - If the property is set, it overrides the impalad startup flag, i.e., extrapolation can be explicitly enabled or disabled regardless of the startup flag. Testing: - added new unit tests - code/hdfs run passed Change-Id: Ie49597bf1b93b7572106abc620d91f199cba0cfd Reviewed-on: http://gerrit.cloudera.org:8080/9139 Reviewed-by: Alex Behm <alex.behm@cloudera.com> Tested-by: Impala Public Jenkins
196 lines
7.3 KiB
Plaintext
196 lines
7.3 KiB
Plaintext
====
|
|
---- QUERY
|
|
# This test relies on a deterministic row order so we use "sort by (id)".
|
|
create table alltypes sort by (id) like functional_parquet.alltypes;
|
|
alter table alltypes set tblproperties("impala.enable.stats.extrapolation"="true");
|
|
insert into alltypes partition(year, month)
|
|
select * from functional_parquet.alltypes where year = 2009;
|
|
====
|
|
---- QUERY
|
|
# No stats are available.
|
|
explain select id from alltypes;
|
|
---- RESULTS: VERIFY_IS_SUBSET
|
|
' stored statistics:'
|
|
' table: rows=unavailable size=unavailable'
|
|
' partitions: 0/12 rows=unavailable'
|
|
' columns: unavailable'
|
|
' extrapolated-rows=unavailable'
|
|
' mem-estimate=16.00MB mem-reservation=0B'
|
|
' tuple-ids=0 row-size=4B cardinality=unavailable'
|
|
---- TYPES
|
|
STRING
|
|
====
|
|
---- QUERY
|
|
compute stats alltypes
|
|
---- RESULTS
|
|
'Updated 1 partition(s) and 11 column(s).'
|
|
---- TYPES
|
|
STRING
|
|
====
|
|
---- QUERY
|
|
# Only the table-level row count is stored. The partition row counts are extrapolated.
|
|
show table stats alltypes
|
|
---- LABELS
|
|
YEAR, MONTH, #ROWS, EXTRAP #ROWS, #FILES, SIZE, BYTES CACHED, CACHE REPLICATION, FORMAT, INCREMENTAL STATS, LOCATION
|
|
---- RESULTS
|
|
'2009','1',-1,308,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=1'
|
|
'2009','2',-1,288,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=2'
|
|
'2009','3',-1,308,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=3'
|
|
'2009','4',-1,302,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=4'
|
|
'2009','5',-1,308,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=5'
|
|
'2009','6',-1,302,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=6'
|
|
'2009','7',-1,308,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=7'
|
|
'2009','8',-1,308,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=8'
|
|
'2009','9',-1,302,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=9'
|
|
'2009','10',-1,308,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=10'
|
|
'2009','11',-1,302,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=11'
|
|
'2009','12',-1,308,1,regex:.*B,'NOT CACHED','NOT CACHED','PARQUET','false','$NAMENODE/test-warehouse/$DATABASE.db/alltypes/year=2009/month=12'
|
|
'Total','',3650,3650,12,regex:.*B,'0B','','','',''
|
|
---- TYPES
|
|
STRING,STRING,BIGINT,BIGINT,BIGINT,STRING,STRING,STRING,STRING,STRING,STRING
|
|
====
|
|
---- QUERY
|
|
# Stats are available now.
|
|
explain select id from alltypes;
|
|
---- RESULTS: VERIFY_IS_EQUAL
|
|
'Max Per-Host Resource Reservation: Memory=0B'
|
|
'Per-Host Resource Estimates: Memory=16.00MB'
|
|
'Codegen disabled by planner'
|
|
''
|
|
'F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1'
|
|
'| Per-Host Resources: mem-estimate=16.00MB mem-reservation=0B'
|
|
'PLAN-ROOT SINK'
|
|
'| mem-estimate=0B mem-reservation=0B'
|
|
'|'
|
|
'00:SCAN HDFS [$DATABASE.alltypes]'
|
|
row_regex:.*partitions=12/12 files=12 size=.*
|
|
' stored statistics:'
|
|
row_regex:.*table: rows=3650 size=.*
|
|
' partitions: 0/12 rows=unavailable'
|
|
' columns: all'
|
|
' extrapolated-rows=3650'
|
|
' mem-estimate=16.00MB mem-reservation=0B'
|
|
' tuple-ids=0 row-size=4B cardinality=3650'
|
|
---- TYPES
|
|
STRING
|
|
====
|
|
---- QUERY
|
|
# Select a subset of partitions.
|
|
explain select id from alltypes where month in (1, 2, 3);
|
|
---- RESULTS: VERIFY_IS_EQUAL
|
|
'Max Per-Host Resource Reservation: Memory=0B'
|
|
'Per-Host Resource Estimates: Memory=16.00MB'
|
|
'Codegen disabled by planner'
|
|
''
|
|
'F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1'
|
|
'| Per-Host Resources: mem-estimate=16.00MB mem-reservation=0B'
|
|
'PLAN-ROOT SINK'
|
|
'| mem-estimate=0B mem-reservation=0B'
|
|
'|'
|
|
'00:SCAN HDFS [$DATABASE.alltypes]'
|
|
row_regex:.*partitions=3/12 files=3 size=.*
|
|
' stored statistics:'
|
|
row_regex:.*table: rows=3650 size=.*
|
|
' partitions: 0/3 rows=unavailable'
|
|
' columns: all'
|
|
' extrapolated-rows=904'
|
|
' mem-estimate=16.00MB mem-reservation=0B'
|
|
' tuple-ids=0 row-size=4B cardinality=904'
|
|
---- TYPES
|
|
STRING
|
|
====
|
|
---- QUERY
|
|
# Double the data in existing partitions.
|
|
insert into alltypes partition(year, month)
|
|
select * from functional_parquet.alltypes where year = 2009;
|
|
explain select id from alltypes;
|
|
---- RESULTS: VERIFY_IS_EQUAL
|
|
'Max Per-Host Resource Reservation: Memory=0B'
|
|
'Per-Host Resource Estimates: Memory=16.00MB'
|
|
''
|
|
'F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1'
|
|
'| Per-Host Resources: mem-estimate=16.00MB mem-reservation=0B'
|
|
'PLAN-ROOT SINK'
|
|
'| mem-estimate=0B mem-reservation=0B'
|
|
'|'
|
|
'00:SCAN HDFS [$DATABASE.alltypes]'
|
|
row_regex:.*partitions=12/12 files=24 size=.*
|
|
' stored statistics:'
|
|
row_regex:.*table: rows=3650 size=.*
|
|
' partitions: 0/12 rows=unavailable'
|
|
' columns: all'
|
|
' extrapolated-rows=7300'
|
|
' mem-estimate=16.00MB mem-reservation=0B'
|
|
' tuple-ids=0 row-size=4B cardinality=7300'
|
|
---- TYPES
|
|
STRING
|
|
====
|
|
---- QUERY
|
|
# Create new partitions and extrapolate their row count.
|
|
insert into alltypes partition(year, month)
|
|
select * from functional_parquet.alltypes where year = 2010;
|
|
explain select id from alltypes where year = 2010;
|
|
---- RESULTS: VERIFY_IS_EQUAL
|
|
'Max Per-Host Resource Reservation: Memory=0B'
|
|
'Per-Host Resource Estimates: Memory=16.00MB'
|
|
'Codegen disabled by planner'
|
|
''
|
|
'F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1'
|
|
'| Per-Host Resources: mem-estimate=16.00MB mem-reservation=0B'
|
|
'PLAN-ROOT SINK'
|
|
'| mem-estimate=0B mem-reservation=0B'
|
|
'|'
|
|
'00:SCAN HDFS [$DATABASE.alltypes]'
|
|
row_regex:.*partitions=12/24 files=12 size=.*
|
|
' stored statistics:'
|
|
row_regex:.*table: rows=3650 size=.*
|
|
' partitions: 0/12 rows=unavailable'
|
|
' columns: all'
|
|
' extrapolated-rows=3651'
|
|
' mem-estimate=16.00MB mem-reservation=0B'
|
|
' tuple-ids=0 row-size=4B cardinality=3651'
|
|
---- TYPES
|
|
STRING
|
|
====
|
|
---- QUERY
|
|
# Compute stats and run the same query again.
|
|
compute stats alltypes;
|
|
explain select id from alltypes where year = 2010;
|
|
---- RESULTS: VERIFY_IS_EQUAL
|
|
'Max Per-Host Resource Reservation: Memory=0B'
|
|
'Per-Host Resource Estimates: Memory=16.00MB'
|
|
'Codegen disabled by planner'
|
|
''
|
|
'F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1'
|
|
'| Per-Host Resources: mem-estimate=16.00MB mem-reservation=0B'
|
|
'PLAN-ROOT SINK'
|
|
'| mem-estimate=0B mem-reservation=0B'
|
|
'|'
|
|
'00:SCAN HDFS [$DATABASE.alltypes]'
|
|
row_regex:.*partitions=12/24 files=12 size=.*
|
|
' stored statistics:'
|
|
row_regex:.*table: rows=10950 size=.*
|
|
' partitions: 0/12 rows=unavailable'
|
|
' columns: all'
|
|
' extrapolated-rows=3651'
|
|
' mem-estimate=16.00MB mem-reservation=0B'
|
|
' tuple-ids=0 row-size=4B cardinality=3651'
|
|
---- TYPES
|
|
STRING
|
|
====
|
|
---- QUERY
|
|
# Test that dropping stats resets everything.
|
|
drop stats alltypes;
|
|
explain select id from alltypes;
|
|
---- RESULTS: VERIFY_IS_SUBSET
|
|
' stored statistics:'
|
|
' table: rows=unavailable size=unavailable'
|
|
' partitions: 0/24 rows=unavailable'
|
|
' columns: unavailable'
|
|
' extrapolated-rows=unavailable'
|
|
' mem-estimate=16.00MB mem-reservation=0B'
|
|
' tuple-ids=0 row-size=4B cardinality=unavailable'
|
|
---- TYPES
|
|
STRING
|
|
====
|