casacore::TableParseFunc Class Reference

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#include <TableParseFunc.h>

Static Public Member Functions
static TableExprNode	makeFuncNode (TableParseQuery *, const String &name, const TableExprNodeSet &arguments, const Vector< int > &ignoreFuncs, const TableExprInfo &tabInfo, const TaQLStyle &)
	Make a function node.
static TableExprNode	makeUDFNode (TableParseQuery *, const String &name, const TableExprNodeSet &arguments, const TableExprInfo &tabInfo, const TaQLStyle &)
	Try to make a UDF function node for the given function name and arguments.
static TableExprFuncNode::FunctionType	findFunc (const String &name, uInt narguments, const Vector< Int > &ignoreFuncs)
	Find the function code belonging to a function name.

Detailed Description

Class containing static functions to handle TaQL functions.

Intended use:

Internal

Review Status

Reviewed By:

UNKNOWN

Date Reviewed:

before2004/08/25

Synopsis

This class contains a few functions to recognize TaQL functions. A function name can be preceded by "shorthand.udflib." telling the table to operate on and the UDF shared library containing the function. Note that most functions are table agnostic, but a few (such as rowid()) are not. Also User Defined Functions (UDFs) can be table aware. Both shorthand and udflib are optional. If a single part is given, it is first tried as a shorthand.

It looks up the function name and creates a TableExprFuncNode object for it. If the function name is not standard, it is tried to create a TableExprUDFNode object. Otherwise an exception is thrown.

Definition at line 65 of file TableParseFunc.h.

Member Function Documentation

findFunc()

static TableExprFuncNode::FunctionType casacore::TableParseFunc::findFunc ( const String &  name, uInt  narguments, const Vector< Int > &  ignoreFuncs  )

static

Find the function code belonging to a function name.

Functions to be ignored can be given (as function type values). If the function name is unknown, NRFUNC is returned.

makeFuncNode()

static TableExprNode casacore::TableParseFunc::makeFuncNode ( TableParseQuery *  , const String &  name, const TableExprNodeSet &  arguments, const Vector< int > &  ignoreFuncs, const TableExprInfo &  tabInfo, const TaQLStyle &    )

static

Make a function node.

The name is split into shorthand, udflib and function as explained in the synopsis.

makeUDFNode()

static TableExprNode casacore::TableParseFunc::makeUDFNode ( TableParseQuery *  , const String &  name, const TableExprNodeSet &  arguments, const TableExprInfo &  tabInfo, const TaQLStyle &    )

static

Try to make a UDF function node for the given function name and arguments.

The function name can contain "shorthand." and must contain "udflib.".

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

• tables/TaQL/TableParseFunc.h