ref_row_iterators.cc File Reference

#include <string.h>
#include <sys/types.h>
#include <algorithm>
#include <cassert>
#include <iterator>
#include <memory>
#include <string>
#include <utility>
#include "ft_global.h"
#include "mem_root_deque.h"
#include "my_alloc.h"
#include "my_base.h"
#include "my_dbug.h"
#include "my_inttypes.h"
#include "my_table_map.h"
#include "sql/debug_sync.h"
#include "sql/handler.h"
#include "sql/item.h"
#include "sql/item_func.h"
#include "sql/item_sum.h"
#include "sql/iterators/basic_row_iterators.h"
#include "sql/iterators/ref_row_iterators.h"
#include "sql/iterators/row_iterator.h"
#include "sql/iterators/timing_iterator.h"
#include "sql/join_optimizer/access_path.h"
#include "sql/key.h"
#include "sql/key_spec.h"
#include "sql/mysqld.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_executor.h"
#include "sql/sql_lex.h"
#include "sql/sql_opt_exec_shared.h"
#include "sql/sql_optimizer.h"
#include "sql/sql_select.h"
#include "sql/system_variables.h"
#include "sql/table.h"
#include "sql/visible_fields.h"
#include "template_utils.h"

Functions
static pair< uchar *, key_part_map >	FindKeyBufferAndMap (const Index_lookup *ref)
static bool	init_index (TABLE *table, handler *file, uint idx, bool sorted)
	Initialize an index scan. More...
static ulonglong	get_exact_record_count (QEP_TAB *qep_tab, uint table_count, int *error)
	Get exact count of rows in all tables. More...

Function Documentation

FindKeyBufferAndMap()

static pair< uchar *, key_part_map > FindKeyBufferAndMap ( const Index_lookup *  ref )

inlinestatic

get_exact_record_count()

static ulonglong get_exact_record_count ( QEP_TAB *  qep_tab, uint  table_count, int *  error  )

static

Get exact count of rows in all tables.

When this is called, at least one table's SE doesn't include HA_COUNT_ROWS_INSTANT.

Parameters

qep_tab	List of qep_tab in this JOIN.
table_count	Count of qep_tab in the JOIN.
error	[out] Return any possible error. Else return 0

Returns

Cartesian product of count of the rows in all tables if success 0 if error.

Note

The "error" parameter is required for the sake of testcases like the one in innodb-wl6742.test:272. Earlier if an error was raised by ha_records, it wasn't handled by get_exact_record_count. Instead it was just allowed to go to the execution phase, where end_send_group would see the same error and raise it.

But with the new function 'end_send_count' in the execution phase, such an error should be properly returned so that it can be raised.

init_index()

static bool init_index ( TABLE *  table, handler *  file, uint  idx, bool  sorted  )

static

Initialize an index scan.

Parameters

table	the table to read
file	the handler to initialize
idx	the index to use
sorted	use the sorted order of the index

Return values

true	if an error occurred
false	on success