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MySQL 5.1: sp_instr_set Class Reference

sp_instr_set Class Reference

#include <sp_head.h>

Inheritance diagram for sp_instr_set:

[legend]Collaboration diagram for sp_instr_set:

[legend]List of all members.


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

Detailed Description

Definition at line 630 of file sp_head.h.

Constructor & Destructor Documentation

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

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

Definition at line 637 of file sp_head.h.

00640     : sp_instr(ip, ctx), m_offset(offset), m_value(val), m_type(type),
00641       m_lex_keeper(lex, lex_resp)
00642   {}

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

Definition at line 644 of file sp_head.h.

00645   {}

Member Function Documentation

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

Reimplemented from sp_instr.

Definition at line 2555 of file sp_head.cc.

References ER_OUT_OF_RESOURCES, sp_instr::m_ip, m_offset, m_value, my_error(), and MYF.

02556 {
02557   int res= thd->spcont->set_variable(thd, m_offset, &m_value);
02558 
02559   if (res && thd->spcont->found_handler_here())
02560   {
02561     /*
02562       Failed to evaluate the value, and a handler has been found. Reset the
02563       variable to NULL.
02564     */
02565 
02566     if (thd->spcont->set_variable(thd, m_offset, 0))
02567     {
02568       /* If this also failed, let's abort. */
02569 
02570       sp_rcontext *spcont= thd->spcont;
02571     
02572       thd->spcont= 0;           /* Avoid handlers */
02573       my_error(ER_OUT_OF_RESOURCES, MYF(0));
02574       spcont->clear_handler();
02575       thd->spcont= spcont;
02576     }
02577   }
02578 
02579   *nextp = m_ip+1;
02580   return res;
02581 }

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

Implements sp_instr.

Definition at line 2545 of file sp_head.cc.

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

02546 {
02547   DBUG_ENTER("sp_instr_set::execute");
02548   DBUG_PRINT("info", ("offset: %u", m_offset));
02549 
02550   DBUG_RETURN(m_lex_keeper.reset_lex_and_exec_core(thd, nextp, TRUE, this));
02551 }

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

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

Implements sp_instr.

Definition at line 2584 of file sp_head.cc.

References sp_pcontext::find_variable(), LEX_STRING::length, sp_instr::m_ctx, m_offset, m_value, sp_variable::name, Item::print(), String::qs_append(), String::reserve(), SP_INSTR_UINT_MAXLEN, LEX_STRING::str, and STRING_WITH_LEN.

02585 {
02586   /* set name@offset ... */
02587   int rsrv = SP_INSTR_UINT_MAXLEN+6;
02588   sp_variable_t *var = m_ctx->find_variable(m_offset);
02589 
02590   /* 'var' should always be non-null, but just in case... */
02591   if (var)
02592     rsrv+= var->name.length;
02593   if (str->reserve(rsrv))
02594     return;
02595   str->qs_append(STRING_WITH_LEN("set "));
02596   if (var)
02597   {
02598     str->qs_append(var->name.str, var->name.length);
02599     str->qs_append('@');
02600   }
02601   str->qs_append(m_offset);
02602   str->qs_append(' ');
02603   m_value->print(str);
02604 }