MySQL 8.4.3
Source Code Documentation
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#include "my_config.h"
#include <float.h>
#include <stdio.h>
#include <string.h>
#include <algorithm>
#include <functional>
#include "keycache.h"
#include "lex_string.h"
#include "m_string.h"
#include "my_compiler.h"
#include "my_dbug.h"
#include "my_inttypes.h"
#include "my_io.h"
#include "my_list.h"
#include "my_macros.h"
#include "my_sys.h"
#include "my_thread_local.h"
#include "mysql/psi/mysql_mutex.h"
#include "mysql/strings/m_ctype.h"
#include "prealloced_array.h"
#include "sql/events.h"
#include "sql/field.h"
#include "sql/item.h"
#include "sql/join_optimizer/access_path.h"
#include "sql/key.h"
#include "sql/keycaches.h"
#include "sql/mysqld.h"
#include "sql/mysqld_thd_manager.h"
#include "sql/opt_explain.h"
#include "sql/opt_trace.h"
#include "sql/opt_trace_context.h"
#include "sql/psi_memory_key.h"
#include "sql/range_optimizer/path_helpers.h"
#include "sql/range_optimizer/range_optimizer.h"
#include "sql/sql_bitmap.h"
#include "sql/sql_class.h"
#include "sql/sql_const.h"
#include "sql/sql_opt_exec_shared.h"
#include "sql/sql_optimizer.h"
#include "sql/sql_select.h"
#include "sql/sql_show.h"
#include "sql/sql_test.h"
#include "sql/system_variables.h"
#include "sql/table.h"
#include "sql/table_cache.h"
#include "sql_string.h"
#include <malloc.h>
Classes | |
struct | TABLE_LOCK_INFO |
class | DL_commpare |
Typedefs | |
typedef Prealloced_array< TABLE_LOCK_INFO, 20 > | Saved_locks_array |
Functions | |
void | print_where (const THD *thd, const Item *cond, const char *info, enum_query_type query_type) |
void | TEST_join (JOIN *join) |
void | print_keyuse_array (THD *thd, Opt_trace_context *trace, const Key_use_array *keyuse_array) |
void | print_plan (JOIN *join, uint idx, double record_count, double read_time, double current_read_time, const char *info) |
Print the current state during query optimization. More... | |
static int | dl_compare (const TABLE_LOCK_INFO *a, const TABLE_LOCK_INFO *b) |
Variables | |
const char * | lock_descriptions [TL_WRITE_ONLY+1] |
typedef Prealloced_array<TABLE_LOCK_INFO, 20> Saved_locks_array |
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inlinestatic |
void print_keyuse_array | ( | THD * | thd, |
Opt_trace_context * | trace, | ||
const Key_use_array * | keyuse_array | ||
) |
void print_plan | ( | JOIN * | join, |
uint | idx, | ||
double | record_count, | ||
double | read_time, | ||
double | current_read_time, | ||
const char * | info | ||
) |
Print the current state during query optimization.
join | pointer to the structure providing all context info for the query |
idx | length of the partial QEP in 'join->positions' also an index in the array 'join->best_ref' |
record_count | estimate for the number of records returned by the best partial plan |
read_time | the cost of the best partial plan. If a complete plan is printed (join->best_read is set), this argument is ignored. |
current_read_time | the accumulated cost of the current partial plan |
info | comment string to appear above the printout |
This function prints to the log file DBUG_FILE the members of 'join' that are used during query optimization (join->positions, join->best_positions, and join->best_ref) and few other related variables (read_time, record_count). Useful to trace query optimizer functions.
void print_where | ( | const THD * | thd, |
const Item * | cond, | ||
const char * | info, | ||
enum_query_type | query_type | ||
) |
void TEST_join | ( | JOIN * | join | ) |
const char* lock_descriptions[TL_WRITE_ONLY+1] |