sp_instr_set_trigger_field Class Reference

#include <sp_instr.h>

Inheritance diagram for sp_instr_set_trigger_field:

Collaboration diagram for sp_instr_set_trigger_field:

Public Member Functions
	sp_instr_set_trigger_field (uint ip, LEX *lex, LEX_STRING trigger_field_name, Item_trigger_field *trigger_field, Item *value_item, LEX_STRING value_query)
virtual void	print (String *str)
virtual bool	exec_core (THD *thd, uint *nextp)
virtual bool	is_invalid () const
virtual void	invalidate ()
virtual bool	on_after_expr_parsing (THD *thd)
virtual void	cleanup_before_parsing (THD *thd)
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
virtual uint	get_cont_dest () const
sp_pcontext *	get_parsing_ctx () const
virtual uint	opt_mark (sp_head *sp, List< sp_instr > *leads)
virtual uint	opt_shortcut_jump (sp_head *sp, sp_instr *start)
virtual void	opt_move (uint dst, List< sp_branch_instr > *ibp)
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_instr
virtual void	get_query (String *sql_query) const
Protected Attributes inherited from sp_instr
bool	m_marked
uint	m_ip
	Instruction pointer.
sp_pcontext *	m_parsing_ctx
	Instruction parsing context.

Detailed Description

sp_instr_set_trigger_field represents SET-statements, which deal with NEW/OLD trigger pseudo-rows.

Definition at line 518 of file sp_instr.h.

Member Function Documentation

void sp_instr_set_trigger_field::cleanup_before_parsing ( THD *  thd )

virtual

Destroy items in the free list before re-parsing the statement query string (and thus, creating new items).

Parameters

thd	Thread context.

Reimplemented from sp_lex_instr.

Definition at line 999 of file sp_instr.cc.

bool sp_instr_set_trigger_field::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 963 of file sp_instr.cc.

virtual LEX_STRING sp_instr_set_trigger_field::get_expr_query ( ) const

inlinevirtual

Returns

the expression query string. This string can not be passed directly to the parser as it is most likely not a valid SQL-statement.

Note

as it can be seen in the get_query() implementation, get_expr_query() might return EMPTY_STR. EMPTY_STR means that no query-expression is available. That happens when class provides different implementation of get_query(). Strictly speaking, this is a drawback of the current class hierarchy.

Reimplemented from sp_lex_instr.

Definition at line 556 of file sp_instr.h.

virtual void sp_instr_set_trigger_field::invalidate ( )

inlinevirtual

Invalidate the object.

Implements sp_lex_instr.

Definition at line 549 of file sp_instr.h.

virtual bool sp_instr_set_trigger_field::is_invalid ( ) const

inlinevirtual

Return values

false	if the object (i.e. LEX-object) is valid and exec_core() can be just called.
true	if the object is not valid any longer, exec_core() can not be called. The original query string should be re-parsed and a new LEX-object should be used.

Implements sp_lex_instr.

Definition at line 546 of file sp_instr.h.

bool sp_instr_set_trigger_field::on_after_expr_parsing ( THD *  thd )

virtual

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 980 of file sp_instr.cc.

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

• sql/sp_instr.h
• sql/sp_instr.cc