m::QueryGraph2SQL Struct Reference

Translates a query graph in SQL. More...

#include <QueryGraph2SQL.hpp>

Inheritance diagram for m::QueryGraph2SQL:

Collaboration diagram for m::QueryGraph2SQL:

Public Member Functions
	QueryGraph2SQL (std::ostream &out)
void	translate (const QueryGraph &)
	Translates the given QueryGraph into SQL.
void	operator() (const QueryGraph &graph)

Private Member Functions
	QueryGraph2SQL (std::ostream &out, const QueryGraph *graph)
	QueryGraph2SQL (std::ostream &out, const QueryGraph *graph, bool after_grouping)
void	insert_projection (const ast::Expr *)
	Inserts a projection for the given Expr which is computed by a grouping operator.
void	translate_projection (std::pair< std::reference_wrapper< const ast::Expr >, ThreadSafePooledOptionalString >)
	Translates a projection for the given pair of Expr and alias.
bool	references_group_by (ast::Designator::target_type)
	Checks whether the given target references an expression contained in the group_by clause.
M_AST_EXPR_LIST(DECLARE) void operator()(const cnf void	operator() (const cnf::Clause &)
void	operator() (const cnf::CNF &)

Static Private Member Functions
static ThreadSafePooledString	make_unique_alias ()

Private Attributes
std::ostream &	out_
	the output stream to write to
const QueryGraph *	graph_
bool	after_grouping_ = false
	the graph to translate

Detailed Description

Translates a query graph in SQL.

Definition at line 13 of file QueryGraph2SQL.hpp.

Constructor & Destructor Documentation

QueryGraph2SQL() [1/3]

m::QueryGraph2SQL::QueryGraph2SQL ( std::ostream &  out )

inline

Definition at line 21 of file QueryGraph2SQL.hpp.

QueryGraph2SQL() [2/3]

m::QueryGraph2SQL::QueryGraph2SQL ( std::ostream &  out, const QueryGraph *  graph  )

inlineprivate

Definition at line 23 of file QueryGraph2SQL.hpp.

QueryGraph2SQL() [3/3]

m::QueryGraph2SQL::QueryGraph2SQL ( std::ostream &  out, const QueryGraph *  graph, bool  after_grouping  )

inlineprivate

Definition at line 24 of file QueryGraph2SQL.hpp.

Member Function Documentation

insert_projection()

void QueryGraph2SQL::insert_projection ( const ast::Expr *  e )

private

Inserts a projection for the given Expr which is computed by a grouping operator.

Adds an alias iff the expression has to be renamed, e.g. due to a multiple use of . in mu*t*able which is not valid in SQL.

Definition at line 95 of file QueryGraph2SQL.cpp.

References graph_, out_, m::replace_all(), m::streq(), and m::to_string().

Referenced by translate_projection().

make_unique_alias()

ThreadSafePooledString QueryGraph2SQL::make_unique_alias ( )

staticprivate

Definition at line 133 of file QueryGraph2SQL.cpp.

References m::Catalog::Get(), id, and m::Catalog::pool().

Referenced by translate().

operator()() [1/3]

void QueryGraph2SQL::operator() ( const cnf::Clause &  clause )

private

Definition at line 210 of file QueryGraph2SQL.cpp.

References out_.

operator()() [2/3]

void QueryGraph2SQL::operator() ( const cnf::CNF &  cnf )

private

Definition at line 219 of file QueryGraph2SQL.cpp.

References out_.

operator()() [3/3]

void m::QueryGraph2SQL::operator() ( const QueryGraph &  graph )

inline

Definition at line 30 of file QueryGraph2SQL.hpp.

References translate().

references_group_by()

bool m::QueryGraph2SQL::references_group_by ( ast::Designator::target_type  )

private

Checks whether the given target references an expression contained in the group_by clause.

translate()

void QueryGraph2SQL::translate

(

const QueryGraph &

graph

)

Translates the given QueryGraph into SQL.

Note that no semicolon is appended.

Definition at line 9 of file QueryGraph2SQL.cpp.

References after_grouping_, m::and, graph_, m::QueryGraph::group_by(), m::QueryGraph::joins(), m::QueryGraph::limit, M_insist, M_unreachable, make_unique_alias(), m::QueryGraph::order_by(), out_, m::QueryGraph::projections(), m::QueryGraph::sources(), translate(), and translate_projection().

Referenced by operator()(), and translate().

translate_projection()

void QueryGraph2SQL::translate_projection ( std::pair< std::reference_wrapper< const ast::Expr >, ThreadSafePooledOptionalString >  p )

private

Translates a projection for the given pair of Expr and alias.

Adds an alias iff none is specified and the expression has to be renamed, e.g. due to a multiple use of . in mu*t*able which is not valid in SQL.

Definition at line 117 of file QueryGraph2SQL.cpp.

References insert_projection(), out_, and m::replace_all().

Referenced by translate().

Field Documentation

after_grouping_

bool m::QueryGraph2SQL::after_grouping_ = false

private

the graph to translate

indicates whether a grouping is already performed

Definition at line 18 of file QueryGraph2SQL.hpp.

Referenced by translate().

graph_

const QueryGraph* m::QueryGraph2SQL::graph_

private

Definition at line 17 of file QueryGraph2SQL.hpp.

Referenced by insert_projection(), and translate().

out_

std::ostream& m::QueryGraph2SQL::out_

private

the output stream to write to

Definition at line 16 of file QueryGraph2SQL.hpp.

Referenced by insert_projection(), operator()(), translate(), and translate_projection().

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

• src/IR/QueryGraph2SQL.hpp
• src/IR/QueryGraph2SQL.cpp