MySQL 5.6.14 Source Code Document
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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) |
Base class for all intermediate tree nodes
Definition at line 145 of file opt_explain_json.cc.
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inlinevirtual |
Add a CTX_JOIN_TAB node to a CTX_JOIN node
ctx | CTX_JOIN_TAB node |
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.
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inlinevirtual |
Add a query specification node to the CTX_UNION node
ctx | query specification node |
false | Ok |
true | Error |
Reimplemented in opt_explain_json_namespace::union_ctx.
Definition at line 269 of file opt_explain_json.cc.
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inlinevirtual |
Append a subquery node to the specified list of the unit node
subquery_type | Describes the Item tree where the subquery exists |
ctx | Subquery node |
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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inlinevirtual |
Associate WHERE subqueries of given context and unit with this object
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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inlinevirtual |
Try to associate a derived subquery node with this or underlying node
subquery | Derived subquery node |
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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inlinevirtual |
Pass the node with its child nodes to a JSON formatter
json | Formatter |
false | Ok |
true | Error |
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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inlinevirtual |
Format nested loop join subtree (if any) to JSON formatter
json | Formatter |
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.
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pure virtual |
Analogue of the "id" column in the traditional EXPLAIN output
hide | if true, ban the output of K_SELECT_ID JSON property in the underlying table_with_where_and_derived_ctx objects |
Implemented in opt_explain_json_namespace::union_ctx, 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, opt_explain_json_namespace::message_ctx, opt_explain_json_namespace::table_with_where_and_derived, opt_explain_json_namespace::union_result_ctx, opt_explain_json_namespace::table_base_ctx, and opt_explain_json_namespace::subquery_ctx.
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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.
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inlinevirtual |
Set nested ORDER BY/GROUP BY/DISTINCT node to ctx
json | Formatter |
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.