#include <sp_instr.h>

Inheritance diagram for sp_instr_set_case_expr:

Collaboration diagram for sp_instr_set_case_expr:

Public Member Functions
	sp_instr_set_case_expr (uint ip, LEX lex, uint case_expr_id, Item case_expr_item, LEX_STRING case_expr_query)
virtual void	print (String *str)
virtual uint	opt_mark (sp_head sp, List< sp_instr > leads)
virtual void	opt_move (uint dst, List< sp_branch_instr > *ibp)
virtual void	set_destination (uint old_dest, uint new_dest)
virtual void	backpatch (uint dest)
virtual bool	exec_core (THD thd, uint nextp)
virtual bool	on_after_expr_parsing (THD *thd)
Public Member Functions inherited from sp_lex_branch_instr
void	set_cont_dest (uint cont_dest)
virtual uint	get_cont_dest () const
virtual bool	is_invalid () const
virtual void	invalidate ()
virtual LEX_STRING	get_expr_query () const
Public Member Functions inherited from sp_lex_instr
	sp_lex_instr (uint ip, sp_pcontext ctx, LEX lex, bool is_lex_owner)
bool	validate_lex_and_execute_core (THD thd, uint nextp, bool open_tables)
virtual bool	execute (THD thd, uint nextp)
Public Member Functions inherited from sp_instr
	sp_instr (uint ip, sp_pcontext *ctx)
uint	get_ip () const
sp_pcontext *	get_parsing_ctx () const
virtual uint	opt_shortcut_jump (sp_head sp, sp_instr start)
bool	opt_is_marked () const

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)
Protected Member Functions inherited from sp_lex_branch_instr
	sp_lex_branch_instr (uint ip, sp_pcontext ctx, LEX lex, Item *expr_item, LEX_STRING expr_query)
	sp_lex_branch_instr (uint ip, sp_pcontext ctx, LEX lex, Item *expr_item, LEX_STRING expr_query, uint dest)
Protected Attributes inherited from sp_lex_branch_instr
uint	m_dest
	Where we will go.
uint	m_cont_dest
	Where continue handlers will go.
sp_instr *	m_optdest
sp_instr *	m_cont_optdest
Item *	m_expr_item
	Expression item.
LEX_STRING	m_expr_query
	SQL-query corresponding to the expression.

Detailed Description

sp_instr_set_case_expr is used in the "simple CASE" implementation to evaluate and store the CASE-expression in the runtime context.

Definition at line 876 of file sp_instr.h.

Member Function Documentation

virtual void sp_instr_set_case_expr::backpatch ( uint dest )

inlinevirtual

Update all instruction with the given label in the backpatch list to the specified instruction pointer.

Parameters

dest	destination instruction pointer.

Reimplemented from sp_lex_branch_instr.

Definition at line 926 of file sp_instr.h.

bool sp_instr_set_case_expr::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.

Definition at line 1681 of file sp_instr.cc.

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virtual bool sp_instr_set_case_expr::on_after_expr_parsing ( THD * thd )

inlinevirtual

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.

Definition at line 935 of file sp_instr.h.

uint sp_instr_set_case_expr::opt_mark	(	sp_head *	sp,
		List< sp_instr > *	leads
	)

virtual

Mark this instruction as reachable during optimization and return the index to the next instruction. Jump instruction will add their destination to the leads list.

Reimplemented from sp_lex_branch_instr.

Definition at line 1721 of file sp_instr.cc.

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void sp_instr_set_case_expr::opt_move	(	uint	dst,
		List< sp_branch_instr > *	ibp
	)

virtual

Inform the instruction that it has been moved during optimization. Most instructions will simply update its index, but jump instructions must also take care of their destination pointers. Forward jumps get pushed to the backpatch list 'ibp'.

Reimplemented from sp_lex_branch_instr.

Definition at line 1738 of file sp_instr.cc.

virtual void sp_instr_set_case_expr::set_destination	(	uint	old_dest,
		uint	new_dest
	)

inlinevirtual

Update the destination; used by the SP-instruction-optimizer.

Parameters

old_dest	current (old) destination (instruction pointer).
new_dest	new destination (instruction pointer).

Reimplemented from sp_lex_branch_instr.

Definition at line 920 of file sp_instr.h.

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

sql/sp_instr.h
sql/sp_instr.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation