database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-27 18:02:13 +03:00
Code Activity

MDEV-17032: Estimates are higher for partitions of a table with @@use_stat_tables= PREFERABLY

Browse Source 
The problem here is EITS statistics does not calculate statistics for the partitions of the table.
So a temporary solution would be to not read EITS statistics for partitioned tables.

Also disabling reading of EITS for columns that participate in the partition list of a table.
This commit is contained in:
Varun Gupta
2018-12-07 02:12:22 +05:30
parent 12b1ba195c
commit 4886d14827
7 changed files with 235 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
sql/sql_statistics.h
View File

@ -109,6 +109,7 @@ double get_column_range_cardinality(Field *field,
key_range *max_endp,
uint range_flag);
bool is_stat_table(const char *db, const char *table);
bool is_eits_usable(Field* field);
class Histogram
{