mondrian.olap.fun
Class ExtractFunDef

java.lang.Object
  org.eigenbase.xom.XMLUtil
      org.eigenbase.xom.XOMUtil
          mondrian.olap.Util
              mondrian.olap.fun.FunUtil
                  mondrian.olap.fun.FunDefBase
                      mondrian.olap.fun.ExtractFunDef

All Implemented Interfaces:

FunDef

 class ExtractFunDef
extends FunDefBase

Definition of the Extract MDX function.

Syntax:

Extract(<Set>, <Dimension>[, <Dimension>...])

Since:

Jun 10, 2007

Version:

$Id: //open/mondrian-release/3.0/src/main/mondrian/olap/fun/ExtractFunDef.java#3 $

Author:

jhyde

Nested Class Summary

Nested classes/interfaces inherited from class mondrian.olap.fun.FunUtil

FunUtil.SetWrapper

Nested classes/interfaces inherited from class mondrian.olap.Util

Util.ErrorCellValue, Util.PropertyList

Field Summary

(package private) static ResolverBase

Resolver

Fields inherited from class mondrian.olap.fun.FunDefBase

flags, parameterCategories, returnCategory, signature

Fields inherited from class mondrian.olap.fun.FunUtil

BooleanNull, DoubleEmpty, DoubleNull, emptyStringArray, IntegerNull, NullMember

Fields inherited from class mondrian.olap.Util

EmptyValue, JdbcVersion, nl, nullValue, PreJdk15, Retrowoven

Method Summary

Calc	compileCall(ResolvedFunCall call, ExpCompiler compiler) Converts a call to this function into executable objects.
Type	getResultType(Validator validator, Exp[] args) Returns the type of a call to this function with a given set of arguments. The default implementation makes the coarse assumption that the return type is in some way related to the type of the first argument.

Methods inherited from class mondrian.olap.fun.FunDefBase

castType, createCall, getDescription, getName, getParameterCategories, getReturnCategory, getSignature, getSyntax, unparse, validateArg

Methods inherited from class mondrian.olap.fun.FunUtil

addMembers, addMembers, addUnique, ancestor, appendTuple, avg, checkCompatible, checkFlag, checkIterListResultStyles, checkListResultStyles, compareHierarchically, compareSiblingMembers, compareValues, compareValues, compareValues, correlation, count, cousin, covariance, createDummyFunDef, decodeCategory, decodeParameterCategories, decodeReturnCategory, decodeSyntacticType, dimensionMembers, equalTuple, evaluateMembers, evaluateMembers, evaluateSet, evaluateSet, evaluateTuples, getLiteralArg, getLiteralArg, getNonEmptyLevelMembers, getNonEmptyMemberChildren, hierarchize, hierarchyMembers, isAncestorOf, isMemberType, levelMembers, makeNullMember, makeNullTuple, max, memberRange, min, newEvalException, newEvalException, percentile, periodsToDate, quartile, removeCalculatedMembers, resolveFunArgs, searchValuesDesc, sign, sortMembers, sortTuples, sortValuesDesc, stdev, sum, sumDouble, sumDouble, toPercent, tupleContainsNullMember, var

Methods inherited from class mondrian.olap.Util

addDatabaseTime, addLevelCalculatedMembers, assertPostcondition, assertPostcondition, assertPrecondition, assertPrecondition, assertTrue, assertTrue, badValue, camelToUpper, caseSensitiveCompareName, cast, cast, commaList, compareKey, compareName, convertStackToString, createExpr, createRandom, createSimpleValidator, createUdf, dbTimeMillis, deprecated, enumSetAllOf, enumSetNoneOf, enumSetOf, equal, equalName, equals, equals, getAnnotation, getErrorMessage, getErrorMessage, getFirstDescendantOnLevel, getMemberOrdinalInParent, hash, hash, hashArray, implode, isEmpty, isNull, isSorted, isValidProperty, lookup, lookup, lookup, lookup, lookupCompound, lookupCompound, lookupHierarchyLevel, lookupHierarchyRootMember, lookupHierarchyRootMember, lookupProperty, makeBigDecimalFromDouble, makeFqName, makeFqName, makeFqName, maskVersion, mdxEncodeString, needToImplement, newError, newError, newInternal, newInternal, nonDbTimeMillis, normalizeName, parseCommaList, parseConnectString, parseIdentifier, printMemory, printMemory, quoteForMdx, quoteMdxIdentifier, quoteMdxIdentifier, quoteMdxIdentifier, quoteMdxIdentifier, quotePattern, readFully, readURL, readURL, readURL, readURL, replace, replace, replaceProperties, singleQuoteString, singleQuoteString, toMap, toURL, unexpected, union, union, uniquify, unparse, unparse, wildcardToRegexp

Methods inherited from class org.eigenbase.xom.XOMUtil

addAll, addAll, addChild, addChild, addChildren, addElement, concatenate, createDefaultParser, discard, discard, discard, discard, discard, discard, discard, discard, discard, getFirstInstance, toList, toVector, wrapperToXml

Methods inherited from class org.eigenbase.xom.XMLUtil

getFirstTagName, printAtt, printAtt, printAtt, printAtt, printPCDATA, printPCDATA, printPCDATA, quoteAtt, quoteAtt, quoteAtt, quoteAtt, quotePCDATA, stringEncodeXML, stringHasXMLSpecials

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

Resolver

static final ResolverBase Resolver

Method Detail

getResultType

public Type getResultType(Validator validator,
                          Exp[] args)

Description copied from class: FunDefBase

Returns the type of a call to this function with a given set of arguments.

The default implementation makes the coarse assumption that the return type is in some way related to the type of the first argument. Operators whose arguments don't follow the requirements of this implementation should override this method.

If the function definition says it returns a literal type (numeric, string, symbol) then it's a fair guess that the function call returns the same kind of value.

If the function definition says it returns an object type (cube, dimension, hierarchy, level, member) then we check the first argument of the function. Suppose that the function definition says that it returns a hierarchy, and the first argument of the function happens to be a member. Then it's reasonable to assume that this function returns a member.

Overrides:

getResultType in class FunDefBase

Parameters:

validator - Validator

args - Arguments to the call to this operator

Returns:

result type of a call this function

compileCall

public Calc compileCall(ResolvedFunCall call,
                        ExpCompiler compiler)

Description copied from interface: FunDef

Converts a call to this function into executable objects.

The result must implement the appropriate interface for the result type. For example, a function which returns an integer must return an object which implements IntegerCalc.

Specified by:

compileCall in interface FunDef

Overrides:

compileCall in class FunDefBase