MySQL 5.1: sp_instr_freturn Class Reference

sp_instr_freturn Class Reference

#include <sp_head.h>

Inheritance diagram for sp_instr_freturn:

[legend]Collaboration diagram for sp_instr_freturn:


Public Member Functions
	sp_instr_freturn (uint ip, sp_pcontext ctx, Item val, enum enum_field_types type, LEX *lex)
virtual	~sp_instr_freturn ()
virtual int	execute (THD thd, uint nextp)
virtual int	exec_core (THD thd, uint nextp)
virtual void	print (String *str)
virtual uint	opt_mark (sp_head *sp)
Protected Attributes
Item *	m_value
enum enum_field_types	m_type
sp_lex_keeper	m_lex_keeper
Private Member Functions
	sp_instr_freturn (const sp_instr_freturn &)
void	operator= (sp_instr_freturn &)

Detailed Description

Definition at line 830 of file sp_head.h.

Constructor & Destructor Documentation

sp_instr_freturn::sp_instr_freturn ( const sp_instr_freturn & ) [private]

sp_instr_freturn::sp_instr_freturn	(	uint	ip,
		sp_pcontext *	ctx,
		Item *	val,
		enum enum_field_types	type,
		LEX *	lex
	)			`[inline]`

Definition at line 837 of file sp_head.h.

00839     : sp_instr(ip, ctx), m_value(val), m_type(type), m_lex_keeper(lex, TRUE)
00840   {}

virtual sp_instr_freturn::~sp_instr_freturn ( ) [inline, virtual]

Definition at line 842 of file sp_head.h.

00843   {}

Member Function Documentation

int sp_instr_freturn::exec_core	(	THD *	thd,
		uint *	nextp
	)			`[virtual]`

Reimplemented from sp_instr.

Definition at line 2810 of file sp_head.cc.

References m_value.

02811 {
02812   /*
02813     Change <next instruction pointer>, so that this will be the last
02814     instruction in the stored function.
02815   */
02816 
02817   *nextp= UINT_MAX;
02818 
02819   /*
02820     Evaluate the value of return expression and store it in current runtime
02821     context.
02822 
02823     NOTE: It's necessary to evaluate result item right here, because we must
02824     do it in scope of execution the current context/block.
02825   */
02826 
02827   return thd->spcont->set_return_value(thd, &m_value);
02828 }

int sp_instr_freturn::execute	(	THD *	thd,
		uint *	nextp
	)			`[virtual]`

Implements sp_instr.

Definition at line 2802 of file sp_head.cc.

References DBUG_ENTER, DBUG_RETURN, m_lex_keeper, sp_lex_keeper::reset_lex_and_exec_core(), and TRUE.

02803 {
02804   DBUG_ENTER("sp_instr_freturn::execute");
02805   DBUG_RETURN(m_lex_keeper.reset_lex_and_exec_core(thd, nextp, TRUE, this));
02806 }

Here is the call graph for this function:

void sp_instr_freturn::operator= ( sp_instr_freturn & ) [private]

virtual uint sp_instr_freturn::opt_mark ( sp_head * sp ) [inline, virtual]

Reimplemented from sp_instr.

Definition at line 851 of file sp_head.h.

References sp_instr::marked.

00852   {
00853     marked= 1;
00854     return UINT_MAX;
00855   }

void sp_instr_freturn::print ( String * str ) [virtual]

Implements sp_instr.

Definition at line 2831 of file sp_head.cc.

References m_type, m_value, Item::print(), String::qs_append(), String::reserve(), and STRING_WITH_LEN.

02832 {
02833   /* freturn type expr... */
02834   if (str->reserve(UINT_MAX+8+32)) // Add some for the expr. too
02835     return;
02836   str->qs_append(STRING_WITH_LEN("freturn "));
02837   str->qs_append((uint)m_type);
02838   str->qs_append(' ');
02839   m_value->print(str);
02840 }