sp_instr_jump_case_when Class Reference

#include <sp_instr.h>

Inheritance diagram for sp_instr_jump_case_when:

Collaboration diagram for sp_instr_jump_case_when:

Public Member Functions
	sp_instr_jump_case_when (uint ip, LEX *lex, int case_expr_id, Item *when_expr_item, LEX_STRING when_expr_query)
virtual void	print (String *str)
virtual bool	exec_core (THD *thd, uint *nextp)
virtual void	invalidate ()
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	opt_mark (sp_head *sp, List< sp_instr > *leads)
virtual void	opt_move (uint dst, List< sp_branch_instr > *ibp)
virtual uint	get_cont_dest () const
virtual bool	is_invalid () const
virtual LEX_STRING	get_expr_query () const
virtual void	set_destination (uint old_dest, uint new_dest)
virtual void	backpatch (uint dest)
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_jump_case_when instruction is used in the "simple CASE" implementation. It's a jump instruction with the following condition: (CASE-expression = WHEN-expression) CASE-expression is retrieved from sp_rcontext; WHEN-expression is kept by this instruction.

Definition at line 958 of file sp_instr.h.

Member Function Documentation

bool sp_instr_jump_case_when::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 1159 of file sp_instr.cc.

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virtual void sp_instr_jump_case_when::invalidate ( )

inlinevirtual

Invalidate the object.

Reimplemented from sp_lex_branch_instr.

Definition at line 983 of file sp_instr.h.

virtual bool sp_instr_jump_case_when::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 991 of file sp_instr.h.

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

• sql/sp_instr.h
• sql/sp_instr.cc