opt_explain_json_namespace Namespace Reference

Classes
class	context
	Base class for all intermediate tree nodes. More...
class	duplication_weedout_ctx
	Context class to represent JOIN_TABs in duplication weedout sequence. More...
class	join_ctx
	Node class for the CTX_JOIN context. More...
class	join_tab_ctx
	Node class for the CTX_QEP_TAB context. More...
class	joinable_ctx
	Base for CTX_QEP_TAB, CTX_DUPLICATES_WEEDOUT and CTX_MATERIALIZATION nodes. More...
class	materialize_ctx
	Context class to group materialized JOIN_TABs to "materialized" array. More...
class	message_ctx
	Node class for CTX_MESSAGE. More...
class	setop_ctx
	Node class for UNION, EXCEPT, INTERSECT, UNARY (query expression) More...
class	setop_result_ctx
	Node class for the CTX_UNION_RESULT. More...
class	simple_sort_ctx
	Base class for CTX_ORDER_BY, CTX_GROUP_BY and node class for CTX_DISTINCT. More...
class	simple_sort_with_subqueries_ctx
	Node class for "simple" CTX_ORDER_BY and CTX_GROUP_BY. More...
class	sort_ctx
	Node class for CTX_SIMPLE_ORDER_BY, CTX_SIMPLE_GROUP_BY and CTX_SIMPLE_DISTINCT. More...
class	sort_with_subqueries_ctx
class	subquery_ctx
	Node class to wrap a subquery node tree. More...
class	table_base_ctx
class	table_with_where_and_derived
	Common part of CTX_QEP_TAB and CTX_MESSAGE nodes. More...
class	unit_ctx
	Helper base class to host HAVING, ORDER BY and GROUP BY subquery nodes. More...
class	window_ctx
	When the query has window functions, an outer node named "windowing" is added: query_block: { select_id: 1, windowing: { windows: [ ... list of all windows' details ... ], nested_loop: [ ... ]. More...

Enumerations
enum	subquery_list_enum {   SQ_SELECT_LIST , SQ_UPDATE_VALUE , SQ_INSERT_VALUES , SQ_INSERT_UPDATE ,   SQ_HAVING , SQ_OPTIMIZED_AWAY , SQ_toplevel , SQ_ORDER_BY ,   SQ_GROUP_BY , SQ_total }

Functions
static bool	format_list (Opt_trace_context *json, List< subquery_ctx > &subqueries, const char *name)
	Helper function to pass a subquery list to a JSON formatter. More...
static void	add_string_array (Opt_trace_context *json, const char *list_name, List< const char > &strings)
static void	print_cost (char *buf, uint buf_len, double cost)
static void	print_filtered (char *buf, uint buf_len, double filtered)
template<typename T >
static size_t	get_id (List< T > &list, bool hide)
	Auxiliary function to walk through the list and propagate "hide" value. More...

Variables
static const char *	list_names [SQ_total]

Enumeration Type Documentation

subquery_list_enum

enum opt_explain_json_namespace::subquery_list_enum

Note

Keep in sync with the list_names array.

Enumerator
SQ_SELECT_LIST	SELECT list subqueries.
SQ_UPDATE_VALUE	UPDATE ... SET field=(subquery)
SQ_INSERT_VALUES	subqueries in VALUES of INSERT ... VALUES
SQ_INSERT_UPDATE	subqueries in UPDATE of INSERT ... ON DUPLICATE KEY UPDATE
SQ_HAVING	HAVING clause subqueries.
SQ_OPTIMIZED_AWAY	"optimized_away_subqueries"
SQ_toplevel	SQ array size for unit_ctx.
SQ_ORDER_BY	ORDER BY clause subqueries.
SQ_GROUP_BY	GROUP BY clause subqueries.
SQ_total

Function Documentation

add_string_array()

static void opt_explain_json_namespace::add_string_array ( Opt_trace_context *  json, const char *  list_name, List< const char > &  strings  )

static

format_list()

static bool opt_explain_json_namespace::format_list ( Opt_trace_context *  json, List< subquery_ctx > &  subqueries, const char *  name  )

static

Helper function to pass a subquery list to a JSON formatter.

Parameters

json	output formatter
subqueries	subquery list to output
name	name for the output section

Return values

false	Ok
true	Error

get_id()

template<typename T >

static size_t opt_explain_json_namespace::get_id ( List< T > &  list, bool  hide  )

static

Auxiliary function to walk through the list and propagate "hide" value.

Parameters

list	list of context (*_ctx) objects
hide	if true, ban the output of K_SELECT_ID JSON property in the underlying table_with_where_and_derived_ctx and materialize_ctx objects

Returns

id of underlying objects

print_cost()

static void opt_explain_json_namespace::print_cost ( char *  buf, uint  buf_len, double  cost  )

static

print_filtered()

static void opt_explain_json_namespace::print_filtered ( char *  buf, uint  buf_len, double  filtered  )

static

Variable Documentation

list_names

const char* opt_explain_json_namespace::list_names[SQ_total]

static

Initial value:

= {
    K_SELECT_LIST_SUBQUERIES,
    K_UPDATE_VALUE_SUBQUERIES,
    K_INSERT_VALUES_SUBQUERIES,
    K_INSERT_UPDATE_SUBQUERIES,
    K_HAVING_SUBQUERIES,
    K_OPTIMIZED_AWAY_SUBQUERIES,
    "",
    K_ORDER_BY_SUBQUERIES,
    K_GROUP_BY_SUBQUERIES,
}

Note

Keep in sync with subquery_list_enum.