Sql_cmd_call Class Reference

#include <sql_call.h>

Inheritance diagram for Sql_cmd_call:

Public Member Functions
	Sql_cmd_call (sp_name *proc_name_arg, mem_root_deque< Item * > *prog_args_arg)
enum_sql_command	sql_command_code () const override
	Return the command code for this statement. More...
bool	is_data_change_stmt () const override
Public Member Functions inherited from Sql_cmd_dml
bool	prepare (THD *thd) override
	Command-specific resolving (doesn't include LEX::prepare()) More...
bool	execute (THD *thd) override
	Execute a DML statement. More...
enum enum_sql_cmd_type	sql_cmd_type () const override
virtual bool	may_use_cursor () const
bool	is_single_table_plan () const override
Query_result *	query_result () const
void	set_query_result (Query_result *result)
	Set query result object for this query statement. More...
void	set_lazy_result ()
	Signal that root result object needs preparing in next execution. More...
Public Member Functions inherited from Sql_cmd
bool	needs_explicit_preparation () const
bool	is_regular () const
bool	is_prepared () const
virtual void	cleanup (THD *)
	Command-specific reinitialization before execution of prepared statement. More...
void	set_owner (Prepared_statement *stmt)
	Set the owning prepared statement. More...
Prepared_statement *	owner () const
	Get the owning prepared statement. More...
void	set_as_part_of_sp ()
	Mark statement as part of procedure. More...
bool	is_part_of_sp () const
virtual bool	accept (THD *, Select_lex_visitor *)
virtual const MYSQL_LEX_CSTRING *	eligible_secondary_storage_engine (THD *) const
	Is this statement of a type and on a form that makes it eligible for execution in a secondary storage engine? More...
virtual bool	is_bulk_load () const
void	disable_secondary_storage_engine ()
	Disable use of secondary storage engines in this statement. More...
void	enable_secondary_storage_engine ()
bool	secondary_storage_engine_disabled () const
	Has use of secondary storage engines been disabled for this statement? More...
void	use_secondary_storage_engine (const handlerton *hton)
	Mark the current statement as using a secondary storage engine. More...
bool	using_secondary_storage_engine () const
	Is this statement using a secondary storage engine? More...
const handlerton *	secondary_engine () const
	Get the handlerton of the secondary engine that is used for executing this statement, or nullptr if a secondary engine is not used. More...
void	set_optional_transform_prepared (bool value)
bool	is_optional_transform_prepared ()

Protected Member Functions
bool	precheck (THD *thd) override
	Perform a precheck of table privileges for the specific operation. More...
bool	check_privileges (THD *thd) override
	Check privileges on a prepared statement, called at start of execution of the statement. More...
bool	prepare_inner (THD *thd) override
	Perform the command-specific parts of DML command preparation, to be called from prepare() More...
bool	execute_inner (THD *thd) override
	The inner parts of query optimization and execution. More...
Protected Member Functions inherited from Sql_cmd_dml
	Sql_cmd_dml ()
bool	is_empty_query () const
void	set_empty_query ()
	Set statement as returning no data. More...
bool	check_all_table_privileges (THD *thd)
	Read and check privileges for all tables in a DML statement. More...
virtual bool	restore_cmd_properties (THD *thd)
	Restore command properties before execution. More...
virtual bool	save_cmd_properties (THD *thd)
	Save command properties, such as prepared query details and table props. More...
const MYSQL_LEX_CSTRING *	get_eligible_secondary_engine (THD *thd) const
	Helper function that checks if the command is eligible for secondary engine and if that's true returns the name of that eligible secondary storage engine. More...
Protected Member Functions inherited from Sql_cmd
	Sql_cmd ()
virtual	~Sql_cmd ()
void	set_prepared ()
	Set this statement as prepared. More...

Private Attributes
sp_name *	proc_name
mem_root_deque< Item * > *	proc_args

Additional Inherited Members
Protected Attributes inherited from Sql_cmd_dml
LEX *	lex
	Pointer to LEX for this statement. More...
Query_result *	result
	Pointer to object for handling of the result. More...
bool	m_empty_query
	True if query will produce no rows. More...
bool	m_lazy_result
	True: prepare query result on next execution. More...

Constructor & Destructor Documentation

Sql_cmd_call()

Sql_cmd_call::Sql_cmd_call ( sp_name *  proc_name_arg, mem_root_deque< Item * > *  prog_args_arg  )

inlineexplicit

Member Function Documentation

check_privileges()

bool Sql_cmd_call::check_privileges ( THD *  thd )

overrideprotectedvirtual

Check privileges on a prepared statement, called at start of execution of the statement.

Check that user has all relevant privileges to the statement, ie. INSERT privilege for columns inserted into, UPDATE privilege for columns that are updated, DELETE privilege for tables that are deleted from, SELECT privilege for columns that are referenced, etc.

Parameters

thd	thread handler

Returns

false if success, true if false

Implements Sql_cmd_dml.

execute_inner()

bool Sql_cmd_call::execute_inner ( THD *  thd )

overrideprotectedvirtual

The inner parts of query optimization and execution.

Execute a DML statement.

Single-table DML operations needs to reimplement this.

Parameters

thd	Thread handler

Returns

false on success, true on error

This is the default implementation for a DML statement and uses a nested-loop join processor per outer-most query block. The implementation is split in two: One for query expressions containing a single query block and one for query expressions containing multiple query blocks combined with UNION.

Reimplemented from Sql_cmd_dml.

is_data_change_stmt()

bool Sql_cmd_call::is_data_change_stmt ( ) const

inlineoverridevirtual

Returns

true if data change statement, false if not (SELECT statement)

Reimplemented from Sql_cmd_dml.

precheck()

bool Sql_cmd_call::precheck ( THD *  thd )

overrideprotectedvirtual

Perform a precheck of table privileges for the specific operation.

Check that user has some relevant privileges for all tables involved in the statement, e.g. SELECT privileges for tables selected from, INSERT privileges for tables inserted into, etc. This function will also populate Table_ref::grant with all privileges the user has for each table, which is later used during checking of column privileges. Note that at preparation time, views are not expanded yet. Privilege checking is thus rudimentary and must be complemented with later calls to Query_block::check_view_privileges(). The reason to call this function at such an early stage is to be able to quickly reject statements for which the user obviously has insufficient privileges. This function is called before preparing the statement. The function must also be complemented with proper privilege checks for all involved columns (e.g. check_column_grant_*).

See also

also the function comment of Query_block::prepare(). During execution of a prepared statement, call check_privileges() instead.

Parameters

thd	thread handler

Returns

false if success, true if false

Implements Sql_cmd_dml.

prepare_inner()

bool Sql_cmd_call::prepare_inner ( THD *  thd )

overrideprotectedvirtual

Perform the command-specific parts of DML command preparation, to be called from prepare()

Parameters

thd	the current thread

Returns

false if success, true if error

Implements Sql_cmd_dml.

sql_command_code()

enum_sql_command Sql_cmd_call::sql_command_code ( ) const

inlineoverridevirtual

Return the command code for this statement.

Implements Sql_cmd.

Member Data Documentation

proc_args

mem_root_deque<Item *>* Sql_cmd_call::proc_args

private

proc_name

sp_name* Sql_cmd_call::proc_name

private

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

• sql/sql_call.h
• sql/sql_call.cc