Query_builder Class Reference

Class that builds the rewritten query by appending literals in the order they appear in the parse tree. More...

#include <query_builder.h>

Inheritance diagram for Query_builder:

Public Member Functions
	Query_builder (const Pattern *pattern, const Replacement *replacement)
bool	visit (MYSQL_ITEM item) override
	Implementation of the visit() function that bridges to add_next_literal(). More...
const std::string &	get_built_query ()
	To be called after visit() has been called for all literals in the parse tree that this Query_builder was visiting. More...
bool	matches () const
	Status of the matching of literals that are not parameter markers. More...
Public Member Functions inherited from services::Literal_visitor
virtual	~Literal_visitor ()=default

Private Member Functions
bool	add_next_literal (MYSQL_ITEM item)
	Adds a literal, assumed to be the next in the parse tree, from the query's parse tree to this Query_builder. More...

Private Attributes
int	m_previous_slot
	The index of the character in 'm_replacement' after the last slot that we filled. More...
std::string	m_replacement
	Query we copy from (replacement string.) More...
std::vector< int >	m_slots
	The slots in the replacement string. More...
std::vector< int >::iterator	m_slots_iter
std::vector< std::string >	m_pattern_literals
	All literals in the pattern, in order of appearance in parse tree. More...
std::vector< std::string >::iterator	m_pattern_literals_iter
std::string	m_built_query
	The query under construction. More...
bool	m_matches_so_far
	Whether the literals in the parse tree match those of the pattern so far. More...

Detailed Description

Class that builds the rewritten query by appending literals in the order they appear in the parse tree.

Constructor & Destructor Documentation

Query_builder()

Query_builder::Query_builder ( const Pattern *  pattern, const Replacement *  replacement  )

inline

Member Function Documentation

add_next_literal()

bool Query_builder::add_next_literal ( MYSQL_ITEM  item )

private

Adds a literal, assumed to be the next in the parse tree, from the query's parse tree to this Query_builder.

Parameters

item	Assumed to be a literal.

Return values

true	The builder is finished. Either it has been detected that the current literal does not match the pattern, or no more literals are needed to build the query.

get_built_query()

const std::string & Query_builder::get_built_query ( )

inline

To be called after visit() has been called for all literals in the parse tree that this Query_builder was visiting.

This function finishes the string to yield a complete query.

matches()

bool Query_builder::matches ( ) const

inline

Status of the matching of literals that are not parameter markers.

Return values

true	The parse tree matches the pattern and it is safe to continue adding literals.
false	Some literal has been found to differ between parse tree and pattern. Execution must end immediately.

visit()

bool Query_builder::visit ( MYSQL_ITEM  item )

inlineoverridevirtual

Implementation of the visit() function that bridges to add_next_literal().

Parameters

item	The current literal.

Implements services::Literal_visitor.

Member Data Documentation

m_built_query

std::string Query_builder::m_built_query

private

The query under construction.

m_matches_so_far

bool Query_builder::m_matches_so_far

private

Whether the literals in the parse tree match those of the pattern so far.

m_pattern_literals

std::vector<std::string> Query_builder::m_pattern_literals

private

All literals in the pattern, in order of appearance in parse tree.

m_pattern_literals_iter

std::vector<std::string>::iterator Query_builder::m_pattern_literals_iter

private

m_previous_slot

int Query_builder::m_previous_slot

private

The index of the character in 'm_replacement' after the last slot that we filled.

m_replacement

std::string Query_builder::m_replacement

private

Query we copy from (replacement string.)

m_slots

std::vector<int> Query_builder::m_slots

private

The slots in the replacement string.

m_slots_iter

std::vector<int>::iterator Query_builder::m_slots_iter

private

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

• plugin/rewriter/query_builder.h