item_sum.h File Reference

#include <assert.h>
#include <sys/types.h>
#include <climits>
#include <cmath>
#include <cstdio>
#include <map>
#include <memory>
#include <optional>
#include <string>
#include <vector>
#include "field_types.h"
#include "my_alloc.h"
#include "my_compiler.h"
#include "my_inttypes.h"
#include "my_sys.h"
#include "my_table_map.h"
#include "my_time.h"
#include "my_tree.h"
#include "mysql/strings/m_ctype.h"
#include "mysql/strings/my_strtoll10.h"
#include "mysql/udf_registration_types.h"
#include "mysql_time.h"
#include "mysqld_error.h"
#include "sql-common/my_decimal.h"
#include "sql/enum_query_type.h"
#include "sql/gis/geometries_cs.h"
#include "sql/gis/wkb.h"
#include "sql/item.h"
#include "sql/item_func.h"
#include "sql/mem_root_array.h"
#include "sql/parse_location.h"
#include "sql/parse_tree_window.h"
#include "sql/sql_base.h"
#include "sql/sql_const.h"
#include "sql/sql_list.h"
#include "sql/sql_udf.h"
#include "sql/thr_malloc.h"
#include "sql/window_lex.h"
#include "sql_string.h"
#include "template_utils.h"

Go to the source code of this file.

Classes
class	Aggregator
	The abstract base class for the Aggregator_* classes. More...
class	Item_sum
	Class Item_sum is the base class used for special expressions that SQL calls 'set functions'. More...
struct	Item_sum::Collect_grouped_aggregate_info
	argument used by walk method collect_grouped_aggregates ("cga") More...
class	Aggregator_distinct
	The distinct aggregator. More...
class	Aggregator_simple
	The pass-through aggregator. More...
class	Item_sum_num
class	Item_sum_int
class	Item_sum_sum
class	Item_sum_count
class	Item_sum_hybrid_field
	This is used in connection which a parent Item_sum: More...
class	Item_sum_num_field
	Common abstract class for: Item_avg_field Item_variance_field. More...
class	Item_avg_field
class	Item_sum_bit_field
	This is used in connection with an Item_sum_bit,. More...
class	Item_sum_json
	Common abstraction for Item_sum_json_array and Item_sum_json_object. More...
class	Item_sum_json_array
	Implements aggregation of values into an array. More...
class	Item_sum_json_object
	Implements aggregation of values into an object. More...
class	Item_sum_avg
class	Item_variance_field
class	Item_sum_variance
class	Item_std_field
class	Item_sum_std
class	Item_sum_hybrid
	Abstract base class for the MIN and MAX aggregate functions. More...
class	Item_sum_min
class	Item_sum_max
class	Item_sum_bit
	Base class used to implement BIT_AND, BIT_OR and BIT_XOR. More...
class	Item_sum_or
class	Item_sum_and
class	Item_sum_xor
class	Item_udf_sum
class	Item_sum_udf_float
class	Item_sum_udf_int
class	Item_sum_udf_str
class	Item_sum_udf_decimal
class	Item_func_group_concat
class	Item_non_framing_wf
	Common parent class for window functions that always work on the entire partition, even if a frame is defined. More...
class	Item_row_number
	ROW_NUMBER window function, cf. More...
class	Item_rank
	RANK or DENSE_RANK window function, cf. More...
class	Item_cume_dist
	CUME_DIST window function, cf. More...
class	Item_percent_rank
	PERCENT_RANK window function, cf. More...
class	Item_ntile
	NTILE window function, cf. More...
class	Item_lead_lag
	LEAD/LAG window functions, cf. More...
class	Item_first_last_value
	FIRST_VALUE/LAST_VALUE window functions, cf. More...
class	Item_nth_value
	NTH_VALUE window function, cf. More...
class	Item_func_grouping
	Class for implementation of the GROUPING function. More...
class	Item_rollup_sum_switcher
	A wrapper Item that contains a number of aggregate items, one for each level of rollup (see Item_rollup_group_item for numbering conventions). More...
class	Item_sum_collect
	Implements ST_Collect which aggregates geometries into Multipoints, Multilinestrings, Multipolygons and Geometrycollections. More...

Functions
int	group_concat_key_cmp_with_distinct (const void *arg, const void *key1, const void *key2)
	Compares the values for fields in expr list of GROUP_CONCAT. More...
int	group_concat_key_cmp_with_order (const void *arg, const void *key1, const void *key2)
	function of sort for syntax: GROUP_CONCAT(expr,... ORDER BY col,... ) More...
int	dump_leaf_key (void *key_arg, element_count count, void *item_arg)
	Append data from current leaf to item->result. More...

Function Documentation

dump_leaf_key()

int dump_leaf_key	(	void *	key_arg,
		element_count	count,
		void *	item_arg
	)

Append data from current leaf to item->result.

To avoid duplicated warnings in Item_func_group_concat::val_str()

To avoid duplicated warnings in Item_func_group_concat::val_str()

group_concat_key_cmp_with_distinct()

int group_concat_key_cmp_with_distinct	(	const void *	arg,
		const void *	key1,
		const void *	key2
	)

Compares the values for fields in expr list of GROUP_CONCAT.

GROUP_CONCAT([DISTINCT] expr [,expr ...]
         [ORDER BY {unsigned_integer | col_name | expr}
             [ASC | DESC] [,col_name ...]]
         [SEPARATOR str_val])

Return values

-1	: key1 < key2
0	: key1 = key2
1	: key1 > key2

group_concat_key_cmp_with_order()

int group_concat_key_cmp_with_order	(	const void *	arg,
		const void *	key1,
		const void *	key2
	)

function of sort for syntax: GROUP_CONCAT(expr,... ORDER BY col,... )