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MDEV-3798: [SHOW] EXPLAIN UPDATE/DELETE

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- Merge with 10.0-base
This commit is contained in:
Sergey Petrunya
2013-10-15 11:51:41 +04:00
parent eb2c6f4513 25d0175fde
commit 1e36cbfa39
71 changed files with 8292 additions and 713 deletions
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54
sql/sql_select.h
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@ -198,6 +198,12 @@ int rr_sequential(READ_RECORD *info);
int rr_sequential_and_unpack(READ_RECORD *info);
#include "sql_explain.h"
/**************************************************************************************
* New EXPLAIN structures END
*************************************************************************************/
class JOIN_CACHE;
class SJ_TMP_TABLE;
class JOIN_TAB_RANGE;
@ -252,7 +258,8 @@ typedef struct st_join_table {
JOIN_TAB_RANGE *bush_children;
/* Special content for EXPLAIN 'Extra' column or NULL if none */
const char *info;
enum explain_extra_tag info;
/*
Bitmap of TAB_INFO_* bits that encodes special line for EXPLAIN 'Extra'
column, or 0 if there is no info.
@ -1334,6 +1341,8 @@ public:
pre_sort_join_tab= NULL;
emb_sjm_nest= NULL;
sjm_lookup_tables= 0;
exec_saved_explain= false;
/*
The following is needed because JOIN::cleanup(true) may be called for
joins for which JOIN::optimize was aborted with an error before a proper
@ -1342,6 +1351,13 @@ public:
table_access_tabs= NULL;
}
/*
TRUE <=> There was a JOIN::exec() call, which saved this JOIN's EXPLAIN.
The idea is that we also save at the end of JOIN::optimize(), but that
might not be the final plan.
*/
bool exec_saved_explain;
int prepare(Item ***rref_pointer_array, TABLE_LIST *tables, uint wind_num,
COND *conds, uint og_num, ORDER *order, ORDER *group,
Item *having, ORDER *proc_param, SELECT_LEX *select,
@ -1466,11 +1482,11 @@ public:
{
return (unit->item && unit->item->is_in_predicate());
}
int print_explain(select_result_sink *result, uint8 explain_flags,
bool on_the_fly,
bool need_tmp_table, bool need_order,
bool distinct,const char *message);
void save_explain_data(Explain_query *output, bool can_overwrite,
bool need_tmp_table, bool need_order, bool distinct);
int save_explain_data_intern(Explain_query *output, bool need_tmp_table,
bool need_order, bool distinct,
const char *message);
private:
/**
TRUE if the query contains an aggregate function but has no GROUP
@ -1826,7 +1842,8 @@ int print_fake_select_lex_join(select_result_sink *result, bool on_the_fly,
SELECT_LEX *select_lex, uint8 select_options);
uint get_index_for_order(ORDER *order, TABLE *table, SQL_SELECT *select,
ha_rows limit, bool *need_sort, bool *reverse);
ha_rows limit, ha_rows *scanned_limit,
bool *need_sort, bool *reverse);
ORDER *simple_remove_const(ORDER *order, COND *where);
bool const_expression_in_where(COND *cond, Item *comp_item,
Field *comp_field= NULL,
@ -1842,6 +1859,29 @@ void push_index_cond(JOIN_TAB *tab, uint keyno);
#define OPT_LINK_EQUAL_FIELDS 1
/* EXPLAIN-related utility functions */
int print_explain_message_line(select_result_sink *result,
uint8 options,
uint select_number,
const char *select_type,
ha_rows *rows,
const char *message);
void explain_append_mrr_info(QUICK_RANGE_SELECT *quick, String *res);
int print_explain_row(select_result_sink *result,
uint8 options,
uint select_number,
const char *select_type,
const char *table_name,
const char *partitions,
enum join_type jtype,
const char *possible_keys,
const char *index,
const char *key_len,
const char *ref,
ha_rows *rows,
const char *extra);
void make_possible_keys_line(TABLE *table, key_map possible_keys, String *line);
/****************************************************************************
Temporary table support for SQL Runtime
***************************************************************************/