Service_visitor Class Reference

This class implements the parse tree visiting service. More...

Inheritance diagram for Service_visitor:

Public Member Functions
	Service_visitor (parse_node_visit_function processor, uchar *arg)
Public Member Functions inherited from Select_lex_visitor
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
bool	visit_item (Item *item) override
Protected Member Functions inherited from Select_lex_visitor
virtual bool	visit_union (Query_expression *)
virtual bool	visit_query_block (Query_block *)

Private Attributes
parse_node_visit_function	m_processor
uchar *	m_arg

Detailed Description

This class implements the parse tree visiting service.

See also

mysql_parser_visit_tree

Constructor & Destructor Documentation

Service_visitor()

Service_visitor::Service_visitor ( parse_node_visit_function  processor, uchar *  arg  )

inline

Parameters

processor	This function will be called for each literal (Item) in the parse tree, along with the Item's type and arg. If the function returns non-zero, parse tree traversal will terminate.
arg	Will be passed to processor on every call.

Member Function Documentation

visit_item()

bool Service_visitor::visit_item ( Item *  item )

inlineoverrideprotectedvirtual

Reimplemented from Select_lex_visitor.

Member Data Documentation

m_arg

uchar* Service_visitor::m_arg

private

m_processor

parse_node_visit_function Service_visitor::m_processor

private

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

• sql/parser_service.cc