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MDEV-18608: Defaults for 10.4: histogram size should be set

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Change the defaults:

-histogram_size=0
+histogram_size=254

-histogram_type=SINGLE_PREC_HB
+histogram_type=DOUBLE_PREC_HB

Adjust the testcases:
- Some have ignorable changes in EXPLAIN outputs and
  more counter increments due to EITS table reads.
- Testcases that meaningfully depend on the old defaults
  are changed to use the old values.
This commit is contained in:
Sergei Petrunia 2019-02-17 22:46:10 +03:00
commit 15a77a1a2c
25 changed files with 136 additions and 115 deletions
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17
mysql-test/main/statistics.test
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@ -5,7 +5,8 @@ drop table if exists t1,t2;
--enable_warnings
set @save_use_stat_tables=@@use_stat_tables;
set @save_hist_size=@@histogram_size, @save_hist_type=@@histogram_type;
set histogram_size=0, histogram_type='single_prec_hb';
DELETE FROM mysql.table_stats;
--sorted_result
DELETE FROM mysql.column_stats;
@ -196,7 +197,7 @@ SELECT db_name, table_name, column_name,
DELETE FROM mysql.column_stats;
set histogram_size= 0;
set histogram_type=default;
set histogram_type='single_prec_hb';
ANALYZE TABLE t1;
@ -657,8 +658,8 @@ FLUSH TABLES;
--query_vertical select UPPER(db_name),UPPER(table_name),UPPER(column_name),min_value,max_value,nulls_ratio,avg_length,avg_frequency,hist_size,hist_type,hex(histogram),decode_histogram(hist_type,histogram) from mysql.column_stats where UPPER(db_name)='WORLD' and UPPER(table_name)='COUNTRYLANGUAGE' and UPPER(column_name) = 'PERCENTAGE';
--query_vertical select UPPER(db_name),UPPER(table_name),UPPER(column_name),min_value,max_value,nulls_ratio,avg_length,avg_frequency,hist_size,hist_type,hex(histogram),decode_histogram(hist_type,histogram) from mysql.column_stats where UPPER(db_name)='WORLD' and UPPER(table_name)='CITY' and UPPER(column_name) = 'POPULATION';
set histogram_type=default;
set histogram_size=default;
set histogram_type='single_prec_hb';
set histogram_size=0;
use test;
DROP DATABASE world;
@ -732,8 +733,8 @@ select db_name, table_name, column_name,
hist_size, hist_type, HEX(histogram)
FROM mysql.column_stats;
set histogram_size=default;
set histogram_type=default;
set histogram_size=0;
set histogram_type='single_prec_hb';
drop table t1;
@ -776,7 +777,7 @@ select db_name, table_name, column_name,
hist_size, hist_type, HEX(histogram)
FROM mysql.column_stats;
set histogram_size=default;
set histogram_size=0;
drop table t1, t2;
@ -898,3 +899,5 @@ DROP TABLE t1;
--echo #
--echo # End of 10.2 tests
--echo #
set histogram_size=@save_hist_size, histogram_type=@save_hist_type;