opt_explain_json_namespace::unit_ctx Class Reference

Inheritance diagram for opt_explain_json_namespace::unit_ctx:

Collaboration diagram for opt_explain_json_namespace::unit_ctx:

Public Member Functions
	unit_ctx (Explain_context_enum type_arg, const char *name_arg, context *parent_arg)
bool	has_no_subqueries () const
virtual bool	format_unit (Opt_trace_context *json)
	Helper function to format output for HAVING, ORDER/GROUP BY subqueries.
virtual bool	add_subquery (subquery_list_enum subquery_type, subquery_ctx *ctx)
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 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	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.
Public Member Functions inherited from Explain_context
	Explain_context (Explain_context_enum type_arg)

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 Attributes inherited from opt_explain_json_namespace::context
const char *	name

Detailed Description

Helper base class to host HAVING, ORDER BY and GROUP BY subquery nodes

Definition at line 475 of file opt_explain_json.cc.

Member Function Documentation

virtual bool opt_explain_json_namespace::unit_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::context.

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, and opt_explain_json_namespace::union_result_ctx.

Definition at line 511 of file opt_explain_json.cc.

bool opt_explain_json_namespace::unit_ctx::has_no_subqueries ( ) const

inline

Helper function to distinguish subquery-less nodes

Return values

true	Node hosts no subqueries
false	Node hosts some subqueries

Definition at line 491 of file opt_explain_json.cc.

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

• sql/opt_explain_json.cc