casacore::TableParse Class Reference

Class to hold values from table grammar parser. More...

#include <TableParse.h>

Public Member Functions
	TableParse ()
	Default constructor for container class. More...
	TableParse (const Table &table, Int tabnr, const String &name, const String &shorthand)
	Associate the table and the shorthand. More...
Bool	test (const String &shortHand) const
	Test if shorthand matches. More...
Int	tabnr () const
	Get the given table number (of $i tables in TempTables) More...
const String &	name () const
	Get the given table name. More...
const String &	shorthand () const
	Get the shorthand. More...
const Table &	table () const
	Get table object. More...
Table &	table ()
void	replaceTable (const Table &)
	Replace the Table object. More...

Private Attributes
Int	tabnr_p
String	name_p
String	shorthand_p
Table	table_p

Detailed Description

Class to hold values from table grammar parser.

Intended use:

Internal

Review Status

Reviewed By:

UNKNOWN

Date Reviewed:

before2004/08/25

Test programs:

tTableGram

Etymology

TableParse is the class used to parse a table command.

Synopsis

TableParse is used by the parser of table select statements. The parser is written in Bison and Flex in files TableGram.y and.l. The statements in there use the routines in this file to act upon a reduced rule. Since multiple tables can be given (with a shorthand), the table names are stored in a container. The variable names can be qualified by the table name and will be looked up in the appropriate table.

A select command is similar to SQL and can look like: SELECT columns FROM tab1 sh1, tab2 sh2, tab3 WHERE sh1.field == 3*sh1.field2... ORDERBY columns GIVING table This is described in more detail in TableGram.l.

The class TableParse only contains information about a table used in the table command.

Global functions are used to operate on the information. The main function is the global function tableCommand. It executes the given TaQL command and returns the resulting table. This is, in fact, the only function to be used by a user.

Motivation

It is necessary to be able to give a table select command in ASCII. This can be used in a CLI or in the table browser to get a subset of a table or to sort a table.

Definition at line 109 of file TableParse.h.

Constructor & Destructor Documentation

casacore::TableParse::TableParse

(

)

Default constructor for container class.

casacore::TableParse::TableParse	(	const Table &	table,
		Int	tabnr,
		const String &	name,
		const String &	shorthand
	)

Associate the table and the shorthand.

Member Function Documentation

const String & casacore::TableParse::name ( ) const

inline

Get the given table name.

Definition at line 1000 of file TableParse.h.

References name_p.

void casacore::TableParse::replaceTable ( const Table &  table )

inline

Replace the Table object.

Definition at line 1012 of file TableParse.h.

References table(), and table_p.

const String & casacore::TableParse::shorthand ( ) const

inline

Get the shorthand.

Definition at line 1003 of file TableParse.h.

References shorthand_p.

const Table & casacore::TableParse::table ( ) const

inline

Get table object.

Definition at line 1006 of file TableParse.h.

References table_p.

Referenced by replaceTable().

Table & casacore::TableParse::table ( )

inline

Definition at line 1009 of file TableParse.h.

References table_p.

Int casacore::TableParse::tabnr ( ) const

inline

Get the given table number (of $i tables in TempTables)

Definition at line 997 of file TableParse.h.

References tabnr_p.

Bool casacore::TableParse::test ( const String &  shortHand ) const

inline

Test if shorthand matches.

If also matches if the given shorthand is empty.

Definition at line 994 of file TableParse.h.

References casacore::String::empty(), and shorthand_p.

Member Data Documentation

String casacore::TableParse::name_p

private

Definition at line 141 of file TableParse.h.

Referenced by name().

String casacore::TableParse::shorthand_p

private

Definition at line 142 of file TableParse.h.

Referenced by shorthand(), and test().

Table casacore::TableParse::table_p

private

Definition at line 143 of file TableParse.h.

Referenced by replaceTable(), and table().

Int casacore::TableParse::tabnr_p

private

Definition at line 140 of file TableParse.h.

Referenced by tabnr().

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

• tables/TaQL/TableParse.h