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Added procedures to delete records by keys from statistical tables.

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Now when a table is dropped the statistics on the table is removed 
from the statistical tables. If the table is altered in such a way
that a column is dropped or the type of the column is changed then
statistics on the column is removed from the table column_stat.
It also triggers removal of the statistics on the indexes who use
this column as its component.

Added procedures that changes the names of the tables or columns
in the statistical tables for. 
These procedures are used when tables/columns are renamed.

Also partly re-factored the code that introduced the persistent
statistical tables.

Added test cases into statistics.test to cover the new code.
This commit is contained in:
Igor Babaev
2012-07-10 16:34:39 -07:00
parent 4a6a08309c
commit 47fae7f08f
11 changed files with 1887 additions and 151 deletions
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7
sql/sql_base.h
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@ -315,6 +315,13 @@ int open_and_lock_tables_derived(THD *thd, TABLE_LIST *tables, bool derived);
int read_statistics_for_table(THD *thd, TABLE *table);
int collect_statistics_for_table(THD *thd, TABLE *table);
int update_statistics_for_table(THD *thd, TABLE *table);
int delete_statistics_for_table(THD *thd, LEX_STRING *db, LEX_STRING *tab);
int delete_statistics_for_column(THD *thd, TABLE *tab, Field *col);
int delete_statistics_for_index(THD *thd, TABLE *tab, KEY *key_info);
int rename_table_in_stat_tables(THD *thd, LEX_STRING *db, LEX_STRING *tab,
LEX_STRING *new_db, LEX_STRING *new_tab);
int rename_column_in_stat_tables(THD *thd, TABLE *tab, Field *col,
const char *new_name);
void set_statistics_for_table(THD *thd, TABLE *table);
extern "C" int simple_raw_key_cmp(void* arg, const void* key1,