Inheritance diagram for opt_explain_json_namespace::context:

Collaboration diagram for opt_explain_json_namespace::context:

Public Member Functions
	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 size_t	id (bool hide=false)=0
virtual bool	cacheable ()
virtual bool	dependent ()
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_subquery (subquery_list_enum subquery_type, subquery_ctx *ctx)
virtual bool	format_nested_loop (Opt_trace_context *json)
virtual bool	add_join_tab (joinable_ctx *ctx)
virtual void	set_sort (sort_ctx *ctx)
virtual bool	add_query_spec (context *ctx)
virtual bool	find_and_set_derived (context *subquery)
virtual bool	add_where_subquery (subquery_ctx ctx, SELECT_LEX_UNIT subquery)
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.
virtual bool	format_unit (Opt_trace_context *json)
	Helper function to format output for HAVING, ORDER/GROUP BY subqueries.
Public Member Functions inherited from Explain_context
	Explain_context (Explain_context_enum type_arg)

Public Attributes
context *	parent
	link to parent node or NULL
Public Attributes inherited from Explain_context
Explain_context_enum	type
	type tag

Protected Attributes
const char *	name

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)

Detailed Description

Base class for all intermediate tree nodes

Definition at line 145 of file opt_explain_json.cc.

Member Function Documentation

virtual bool opt_explain_json_namespace::context::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 in opt_explain_json_namespace::duplication_weedout_ctx, opt_explain_json_namespace::materialize_ctx, opt_explain_json_namespace::join_ctx, and opt_explain_json_namespace::simple_sort_ctx.

Definition at line 249 of file opt_explain_json.cc.

virtual bool opt_explain_json_namespace::context::add_query_spec ( context * ctx )

inlinevirtual

Add a query specification node to the CTX_UNION node

Parameters

ctx	query specification node

Return values

false	Ok
true	Error

Reimplemented in opt_explain_json_namespace::union_ctx.

Definition at line 269 of file opt_explain_json.cc.

virtual bool opt_explain_json_namespace::context::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 in opt_explain_json_namespace::duplication_weedout_ctx, opt_explain_json_namespace::materialize_ctx, opt_explain_json_namespace::sort_with_subqueries_ctx, opt_explain_json_namespace::join_ctx, opt_explain_json_namespace::simple_sort_with_subqueries_ctx, opt_explain_json_namespace::union_result_ctx, and opt_explain_json_namespace::unit_ctx.

Definition at line 228 of file opt_explain_json.cc.

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virtual bool opt_explain_json_namespace::context::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 in opt_explain_json_namespace::duplication_weedout_ctx, opt_explain_json_namespace::materialize_ctx, opt_explain_json_namespace::join_ctx, opt_explain_json_namespace::simple_sort_ctx, opt_explain_json_namespace::join_tab_ctx, and opt_explain_json_namespace::message_ctx.

Definition at line 293 of file opt_explain_json.cc.

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

inlinevirtual

Try to associate a derived subquery node with this or underlying node

Parameters

subquery Derived subquery node

Return values

true	Success
false	Can't associate: this node or its child nodes are not derived from the subquery

Reimplemented in opt_explain_json_namespace::duplication_weedout_ctx, opt_explain_json_namespace::materialize_ctx, opt_explain_json_namespace::join_ctx, opt_explain_json_namespace::simple_sort_ctx, opt_explain_json_namespace::join_tab_ctx, and opt_explain_json_namespace::message_ctx.

Definition at line 280 of file opt_explain_json.cc.

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virtual bool opt_explain_json_namespace::context::format ( Opt_trace_context * json )

inlinevirtual

Pass the node with its child nodes to a JSON formatter

Parameters

json Formatter

Return values

false	Ok
true	Error

Note: The join_ctx class overloads this function.

Reimplemented in opt_explain_json_namespace::union_result_ctx, and opt_explain_json_namespace::subquery_ctx.

Definition at line 172 of file opt_explain_json.cc.

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virtual bool opt_explain_json_namespace::context::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 in opt_explain_json_namespace::duplication_weedout_ctx, opt_explain_json_namespace::materialize_ctx, and opt_explain_json_namespace::join_ctx.

Definition at line 238 of file opt_explain_json.cc.

virtual size_t opt_explain_json_namespace::context::id ( bool hide = false )

pure virtual

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

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virtual void opt_explain_json_namespace::context::set_child ( context * child )

inlinevirtual

Associate a child node with this node

This function is to be overloaded by subquery_ctx.

Reimplemented in opt_explain_json_namespace::subquery_ctx.

Definition at line 214 of file opt_explain_json.cc.

virtual void opt_explain_json_namespace::context::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 in opt_explain_json_namespace::duplication_weedout_ctx, opt_explain_json_namespace::materialize_ctx, and opt_explain_json_namespace::join_ctx.

Definition at line 259 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

Public Attributes

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation