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MDEV-17255: New optimizer defaults and ANALYZE TABLE

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Added to new values to the server variable use_stat_tables.
The values are COMPLEMENTARY_FOR_QUERIES and PREFERABLY_FOR_QUERIES.
Both these values don't allow to collect EITS for queries like
    analyze table t1;
To collect EITS we would need to use the syntax with persistent like
   analyze table t1 persistent for columns (col1,col2...) index (idx1, idx2...) / ALL

Changing the default value from NEVER to PREFERABLY_FOR_QUERIES.
This commit is contained in:
Varun Gupta
2018-12-09 13:25:27 +05:30
parent 93c360e3a5
commit 9207a838ed
12 changed files with 199 additions and 16 deletions
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2
sql/sql_admin.cc
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@ -767,7 +767,7 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
}
collect_eis=
(table->table->s->table_category == TABLE_CATEGORY_USER &&
(get_use_stat_tables_mode(thd) > NEVER ||
(check_eits_collection_allowed(thd) ||
lex->with_persistent_for_clause));