Inheritance diagram for opt_explain_json_namespace::duplication_weedout_ctx:

Collaboration diagram for opt_explain_json_namespace::duplication_weedout_ctx:

Public Member Functions
	duplication_weedout_ctx (context *parent_arg)
virtual size_t	id (bool hide)
virtual bool	cacheable ()
virtual bool	dependent ()
virtual bool	add_join_tab (joinable_ctx *ctx)
virtual bool	add_subquery (subquery_list_enum subquery_type, subquery_ctx *ctx)
virtual bool	add_where_subquery (subquery_ctx ctx, SELECT_LEX_UNIT subquery)
virtual bool	find_and_set_derived (context *subquery)
virtual bool	format_nested_loop (Opt_trace_context *json)
virtual bool	format_unit (Opt_trace_context *json)
	Helper function to format output for HAVING, ORDER/GROUP BY subqueries.
virtual void	set_sort (sort_ctx *ctx)
Public Member Functions inherited from opt_explain_json_namespace::joinable_ctx
	joinable_ctx (Explain_context_enum type_arg, const char name_arg, context parent_arg)
Public Member Functions inherited from opt_explain_json_namespace::context
	context (Explain_context_enum type_arg, const char name_arg, context parent_arg)
virtual bool	format (Opt_trace_context *json)
bool	is_query_block () const
virtual class qep_row *	entry ()
virtual void	set_child (context *child)
virtual void	set_union_result (union_result_ctx *ctx)
	associate CTX_UNION_RESULT node with CTX_UNION node
virtual bool	add_query_spec (context *ctx)
virtual bool	format_derived (Opt_trace_context *json)
	Helper function to format output for derived subquery if any.
virtual bool	format_where (Opt_trace_context *json)
	Helper function to format output for associated WHERE subqueries if any.
Public Member Functions inherited from Explain_context
	Explain_context (Explain_context_enum type_arg)
Public Member Functions inherited from opt_explain_json_namespace::join_ctx
	join_ctx (Explain_context_enum type_arg, const char name_arg, context parent_arg)
Public Member Functions inherited from opt_explain_json_namespace::unit_ctx
	unit_ctx (Explain_context_enum type_arg, const char name_arg, context parent_arg)
bool	has_no_subqueries () const

Additional Inherited Members
Static Public Member Functions inherited from Sql_alloc
static void *	operator new (size_t size) throw ()
static void *	operator new[] (size_t size) throw ()
static void *	operator new[] (size_t size, MEM_ROOT *mem_root) throw ()
static void *	operator new (size_t size, MEM_ROOT *mem_root) throw ()
static void	operator delete (void *ptr, size_t size)
static void	operator delete (void ptr, MEM_ROOT mem_root)
static void	operator delete[] (void ptr, MEM_ROOT mem_root)
static void	operator delete[] (void *ptr, size_t size)
Public Attributes inherited from opt_explain_json_namespace::context
context *	parent
	link to parent node or NULL
Protected Member Functions inherited from opt_explain_json_namespace::join_ctx
virtual bool	format_body (Opt_trace_context json, Opt_trace_object obj)
Protected Attributes inherited from opt_explain_json_namespace::context
const char *	name
Protected Attributes inherited from opt_explain_json_namespace::join_ctx
List< joinable_ctx >	join_tabs
	hosted JOIN_TAB nodes
sort_ctx *	sort

Detailed Description

Context class to represent JOIN_TABs in duplication weedout sequence

Definition at line 1403 of file opt_explain_json.cc.

Member Function Documentation

virtual bool opt_explain_json_namespace::duplication_weedout_ctx::add_join_tab ( joinable_ctx * ctx )

inlinevirtual

Add a CTX_JOIN_TAB node to a CTX_JOIN node

Parameters

ctx	CTX_JOIN_TAB node

Return values

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::join_ctx.

Definition at line 1417 of file opt_explain_json.cc.

virtual bool opt_explain_json_namespace::duplication_weedout_ctx::add_subquery	(	subquery_list_enum	subquery_type,
		subquery_ctx *	ctx
	)

inlinevirtual

Append a subquery node to the specified list of the unit node

Parameters

subquery_type	Describes the Item tree where the subquery exists
ctx	Subquery node

Return values

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::join_ctx.

Definition at line 1419 of file opt_explain_json.cc.

virtual bool opt_explain_json_namespace::duplication_weedout_ctx::add_where_subquery	(	subquery_ctx *	ctx,
		SELECT_LEX_UNIT *	subquery
	)

inlinevirtual

Associate WHERE subqueries of given context and unit with this object

Parameters

ctx	Context of WHERE subquery
subquery	For CTX_JOIN_TAB: match given unit with a previously collected by the register_where_subquery function.

Reimplemented from opt_explain_json_namespace::join_ctx.

Definition at line 1421 of file opt_explain_json.cc.

virtual bool opt_explain_json_namespace::duplication_weedout_ctx::find_and_set_derived ( context * subquery )

inlinevirtual

Associate a CTX_DERIVED node with its CTX_JOIN_TAB node

Parameters

subquery derived subquery tree

Reimplemented from opt_explain_json_namespace::join_ctx.

Definition at line 1423 of file opt_explain_json.cc.

virtual bool opt_explain_json_namespace::duplication_weedout_ctx::format_nested_loop ( Opt_trace_context * json )

inlinevirtual

Format nested loop join subtree (if any) to JSON formatter

Parameters

json Formatter

Return values

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::join_ctx.

Definition at line 1425 of file opt_explain_json.cc.

virtual size_t opt_explain_json_namespace::duplication_weedout_ctx::id ( bool hide )

inlinevirtual

Analogue of the "id" column in the traditional EXPLAIN output

Parameters

hide	if true, ban the output of K_SELECT_ID JSON property in the underlying table_with_where_and_derived_ctx objects

Returns: "Select number" that is associated with this node

Reimplemented from opt_explain_json_namespace::join_ctx.

Definition at line 1412 of file opt_explain_json.cc.

virtual void opt_explain_json_namespace::duplication_weedout_ctx::set_sort ( sort_ctx * ctx )

inlinevirtual

Set nested ORDER BY/GROUP BY/DISTINCT node to ctx

Parameters

json Formatter

Return values

false	Ok
true	Error

Reimplemented from opt_explain_json_namespace::join_ctx.

Definition at line 1429 of file opt_explain_json.cc.

The documentation for this class was generated from the following file:

sql/opt_explain_json.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation