Select_lex_visitor Class Reference

Abstract base class for traversing the Query_block tree. More...

#include <select_lex_visitor.h>

Inheritance diagram for Select_lex_visitor:

Public Member Functions
virtual bool	visits_in_prefix_order () const
bool	visit (Query_expression *unit)
bool	visit (Query_block *query_block)
bool	visit (Item *item)
	Called for all nodes of all expression trees (i.e. Item trees). More...
virtual	~Select_lex_visitor ()=0
	Gcc demands an implementation for a virtual destructor. More...

Protected Member Functions
virtual bool	visit_union (Query_expression *)
virtual bool	visit_query_block (Query_block *)
virtual bool	visit_item (Item *)

Detailed Description

Abstract base class for traversing the Query_block tree.

In order to use it, a client defines a subclass, overriding the member functions that visit the objects of interest. If a function returns true, traversal is aborted.

Constructor & Destructor Documentation

~Select_lex_visitor()

Select_lex_visitor::~Select_lex_visitor ( )

pure virtualdefault

Gcc demands an implementation for a virtual destructor.

Member Function Documentation

visit() [1/3]

bool Select_lex_visitor::visit ( Item *  item )

inline

Called for all nodes of all expression trees (i.e. Item trees).

visit() [2/3]

bool Select_lex_visitor::visit ( Query_block *  query_block )

inline

visit() [3/3]

bool Select_lex_visitor::visit ( Query_expression *  unit )

inline

visit_item()

virtual bool Select_lex_visitor::visit_item ( Item *  )

inlineprotectedvirtual

Reimplemented in Service_visitor.

visit_query_block()

virtual bool Select_lex_visitor::visit_query_block ( Query_block *  )

inlineprotectedvirtual

visit_union()

virtual bool Select_lex_visitor::visit_union ( Query_expression *  )

inlineprotectedvirtual

visits_in_prefix_order()

virtual bool Select_lex_visitor::visits_in_prefix_order ( ) const

inlinevirtual

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

• sql/select_lex_visitor.h
• sql/select_lex_visitor.cc