-
Bug
-
-
Major
-
Resolution:
Fixed
-
None
-
None
-
None
-
-
maria-10.0-mwl253 tree
I get the latest maria-10.0-mwl253 tree, compile it, and start the client:
./mysql-test-run --start-and-exit
|
mysql -uroot -A --socket=/data0/psergey/dev2/maria-10.0-mwl253/mysql-test/var/tmp/mysqld.1.sock
|
This is to make sure I have the right system tables.
MariaDB [(none)]> use test;
|
Database changed
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MariaDB [test]> create table t1 (a int);
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Query OK, 0 rows affected (0.00 sec)
|
|
MariaDB [test]> insert into t1 values (1),(2),(3);
|
Query OK, 3 rows affected (0.01 sec)
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Records: 3 Duplicates: 0 Warnings: 0
|
|
MariaDB [test]> set histogram_size=100;
|
Query OK, 0 rows affected (0.00 sec)
|
|
MariaDB [test]> analyze table t1 persistent for all;
|
+---------+---------+----------+----------+
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| Table | Op | Msg_type | Msg_text |
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+---------+---------+----------+----------+
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| test.t1 | analyze | status | OK |
|
+---------+---------+----------+----------+
|
1 row in set (0.00 sec)
|
|
MariaDB [test]> select * from mysql.column_stats\G
|
*************************** 1. row ***************************
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db_name: test
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table_name: t1
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column_name: a
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min_value: 1
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max_value: 3
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nulls_ratio: 0.0000
|
avg_length: 4.0000
|
avg_frequency: 1.0000
|
hist_size: 100
|
hist_type:
|
histogram: ���������������������������������
|
1 row in set (0.00 sec)
|
|
MariaDB [test]> select length(hist_type) from mysql.column_stats;
|
+-------------------+
|
| length(hist_type) |
|
+-------------------+
|
| 0 |
|
+-------------------+
|
1 row in set (0.00 sec)
|
That is, hist_type is empty.
MariaDB [test]> select @@histogram_type;
|
+------------------+
|
| @@histogram_type |
|
+------------------+
|
| SINGLE_PREC_HB |
|
+------------------+
|
1 row in set (0.00 sec)
|
|
- relates to
-
MDEV-4145
Take into account the selectivity of single-table range predicates on non-indexed columns when searching for the best execution plan
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-
Closed
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See also
MDEV-4359