sp_instr_stmt Class Reference

#include <sp_instr.h>

Inheritance diagram for sp_instr_stmt:

List of all members.

Public Member Functions
	sp_instr_stmt (uint ip, LEX *lex, LEX_STRING query)
virtual bool	execute (THD *thd, uint *nextp)
virtual void	print (String *str)
virtual bool	exec_core (THD *thd, uint *nextp)
virtual bool	is_invalid () const
virtual void	invalidate ()
virtual void	get_query (String *sql_query) const
virtual bool	on_after_expr_parsing (THD *thd)

---

Detailed Description

sp_instr_stmt represents almost all conventional SQL-statements, which are supported outside stored programs.

SET-statements, which deal with SP-variable or NEW/OLD trigger pseudo-rows are not represented by this instruction.

---

Member Function Documentation

bool sp_instr_stmt::exec_core	(	THD *	thd,
		uint *	nextp
	)		[virtual]

Execute core function of instruction after all preparations (e.g. setting of proper LEX, saving part of the thread context).

Parameters:

thd	Thread context.
nextp[out]	next instruction pointer

Returns:

Error flag.

Implements sp_lex_instr.

bool sp_instr_stmt::execute	(	THD *	thd,
		uint *	nextp
	)		[virtual]

Execute this instruction

Parameters:

	thd	Thread context
[out]	nextp	index of the next instruction to execute. (For most instructions this will be the instruction following this one). Note that this parameter is undefined in case of errors, use get_cont_dest() to find the continuation instruction for CONTINUE error handlers.

Returns:

Error status.

Reimplemented from sp_lex_instr.

virtual void sp_instr_stmt::get_query

(

String *

sql_query

)

const [inline, virtual]

Return the query string, which can be passed to the parser. I.e. the operation should return a valid SQL-statement query string.

Parameters:

[out]

sql_query

SQL-statement query string.

Reimplemented from sp_lex_instr.

virtual void sp_instr_stmt::invalidate

(

)

[inline, virtual]

Invalidate the object.

Implements sp_lex_instr.

virtual bool sp_instr_stmt::is_invalid

(

)

const [inline, virtual]

Return values:

false	if the object (i.e. LEX-object) is valid and exec_core() can be just called.
true	if the object is not valid any longer, exec_core() can not be called. The original query string should be re-parsed and a new LEX-object should be used.

Implements sp_lex_instr.

virtual bool sp_instr_stmt::on_after_expr_parsing

(

THD *

thd

)

[inline, virtual]

Callback function which is called after the statement query string is successfully parsed, and the thread context has not been switched to the outer context. The thread context contains new LEX-object corresponding to the parsed query string.

Parameters:

thd	Thread context.

Returns:

Error flag.

Reimplemented from sp_lex_instr.

---

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

• sp_instr.h
• sp_instr.cc