MySQL 5.1: sp_instr_set_case_expr Class Reference

sp_instr_set_case_expr Class Reference

#include <sp_head.h>

Inheritance diagram for sp_instr_set_case_expr:

[legend]Collaboration diagram for sp_instr_set_case_expr:


Public Member Functions
	sp_instr_set_case_expr (uint ip, sp_pcontext ctx, uint case_expr_id, Item case_expr, LEX *lex)
virtual	~sp_instr_set_case_expr ()
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)
virtual void	opt_move (uint dst, List< sp_instr > *ibp)
virtual void	set_destination (uint old_dest, uint new_dest)
Private Attributes
uint	m_case_expr_id
Item *	m_case_expr
sp_lex_keeper	m_lex_keeper

Detailed Description

Definition at line 1136 of file sp_head.h.

Constructor & Destructor Documentation

sp_instr_set_case_expr::sp_instr_set_case_expr	(	uint	ip,
		sp_pcontext *	ctx,
		uint	case_expr_id,
		Item *	case_expr,
		LEX *	lex
	)			`[inline]`

Definition at line 1140 of file sp_head.h.

01142     : sp_instr_opt_meta(ip, ctx),
01143       m_case_expr_id(case_expr_id), m_case_expr(case_expr),
01144       m_lex_keeper(lex, TRUE)
01145   {}

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

Definition at line 1147 of file sp_head.h.

01148   {}

Member Function Documentation

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

Reimplemented from sp_instr.

Definition at line 3269 of file sp_head.cc.

References ER_OUT_OF_RESOURCES, m_case_expr, m_case_expr_id, sp_instr_opt_meta::m_cont_dest, sp_instr::m_ip, my_error(), and MYF.

03270 {
03271   int res= thd->spcont->set_case_expr(thd, m_case_expr_id, &m_case_expr);
03272 
03273   if (res &&
03274       !thd->spcont->get_case_expr(m_case_expr_id) &&
03275       thd->spcont->found_handler_here())
03276   {
03277     /*
03278       Failed to evaluate the value, the case expression is still not
03279       initialized, and a handler has been found. Set to NULL so we can continue.
03280     */
03281 
03282     Item *null_item= new Item_null();
03283     
03284     if (!null_item ||
03285         thd->spcont->set_case_expr(thd, m_case_expr_id, &null_item))
03286     {
03287       /* If this also failed, we have to abort. */
03288 
03289       sp_rcontext *spcont= thd->spcont;
03290     
03291       thd->spcont= 0;           /* Avoid handlers */
03292       my_error(ER_OUT_OF_RESOURCES, MYF(0));
03293       spcont->clear_handler();
03294       thd->spcont= spcont;
03295     }
03296     *nextp= m_cont_dest;        /* For continue handler */
03297   }
03298   else
03299     *nextp= m_ip+1;
03300 
03301   return res;
03302 }

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

Implements sp_instr.

Definition at line 3260 of file sp_head.cc.

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

03261 {
03262   DBUG_ENTER("sp_instr_set_case_expr::execute");
03263 
03264   DBUG_RETURN(m_lex_keeper.reset_lex_and_exec_core(thd, nextp, TRUE, this));
03265 }

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uint sp_instr_set_case_expr::opt_mark ( sp_head * sp ) [virtual]

Reimplemented from sp_instr.

Definition at line 3319 of file sp_head.cc.

References sp_head::get_instr(), sp_instr_opt_meta::m_cont_dest, sp_instr_opt_meta::m_cont_optdest, sp_instr::m_ip, sp_instr::marked, sp_head::opt_mark(), and sp_instr::opt_shortcut_jump().

03320 {
03321   sp_instr *i;
03322 
03323   marked= 1;
03324   if ((i= sp->get_instr(m_cont_dest)))
03325   {
03326     m_cont_dest= i->opt_shortcut_jump(sp, this);
03327     m_cont_optdest= sp->get_instr(m_cont_dest);
03328   }
03329   sp->opt_mark(m_cont_dest);
03330   return m_ip+1;
03331 }

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void sp_instr_set_case_expr::opt_move	(	uint	dst,
		List< sp_instr > *	ibp
	)			`[virtual]`

Reimplemented from sp_instr.

Definition at line 3334 of file sp_head.cc.

References sp_instr_opt_meta::m_cont_dest, sp_instr_opt_meta::m_cont_optdest, sp_instr::m_ip, and List< T >::push_back().

03335 {
03336   if (m_cont_dest > m_ip)
03337     bp->push_back(this);        // Forward
03338   else if (m_cont_optdest)
03339     m_cont_dest= m_cont_optdest->m_ip; // Backward
03340   m_ip= dst;
03341 }

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

Implements sp_instr.

Definition at line 3306 of file sp_head.cc.

References m_case_expr, m_case_expr_id, sp_instr_opt_meta::m_cont_dest, Item::print(), String::qs_append(), String::reserve(), SP_INSTR_UINT_MAXLEN, and STRING_WITH_LEN.

03307 {
03308   /* set_case_expr (cont) id ... */
03309   str->reserve(2*SP_INSTR_UINT_MAXLEN+18+32); // Add some extra for expr too
03310   str->qs_append(STRING_WITH_LEN("set_case_expr ("));
03311   str->qs_append(m_cont_dest);
03312   str->qs_append(STRING_WITH_LEN(") "));
03313   str->qs_append(m_case_expr_id);
03314   str->qs_append(' ');
03315   m_case_expr->print(str);
03316 }

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virtual void sp_instr_set_case_expr::set_destination	(	uint	old_dest,
		uint	new_dest
	)			`[inline, virtual]`

Implements sp_instr_opt_meta.

Definition at line 1160 of file sp_head.h.

References sp_instr_opt_meta::m_cont_dest.

01161   {
01162     if (m_cont_dest == old_dest)
01163       m_cont_dest= new_dest;
01164   }

Member Data Documentation

Item* sp_instr_set_case_expr::m_case_expr [private]

Definition at line 1169 of file sp_head.h.

Referenced by exec_core(), and print().

uint sp_instr_set_case_expr::m_case_expr_id [private]

Definition at line 1168 of file sp_head.h.

Referenced by exec_core(), and print().

sp_lex_keeper sp_instr_set_case_expr::m_lex_keeper [private]

Definition at line 1170 of file sp_head.h.

Referenced by execute().

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

mysql/src/5.1-dbg/sql/sp_head.h
mysql/src/5.1-dbg/sql/sp_head.cc

Generated on Sat Sep 9 23:31:28 2006 for MySQL 5.1 by

1.4.7

sp_instr_set_case_expr Class Reference

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation