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Oracle® OLAP Java API Reference
11g Release 2 (11.2)

E10794-05


oracle.olapi.syntax
Class NullExpression

java.lang.Object
  extended by oracle.olapi.syntax.SyntaxObject
      extended by oracle.olapi.syntax.DataObject
          extended by oracle.olapi.syntax.Expression
              extended by oracle.olapi.syntax.TypedExpression
                  extended by oracle.olapi.syntax.LiteralExpression
                      extended by oracle.olapi.syntax.NullExpression

All Implemented Interfaces:
FunctionArgument

public final class NullExpression
extends LiteralExpression

A LiteralExpression that represents null. An application gets the instance of NullExpression by using the static constant NullExpression.INSTANCE.


Field Summary
static NullExpression INSTANCE
          A constant that represents an instance of this class.

 

Method Summary
 java.lang.Object visit(SyntaxObjectVisitor visitor, java.lang.Object context)
          Calls the visitNullExpression method of the SyntaxObjectVisitor and passes that method this NullExpression and an Object.

 

Methods inherited from class oracle.olapi.syntax.TypedExpression
abs, acos, addMonths, addMonths, ascii, asciiStr, asin, atan, atan2, between, binToNum, bitAnd, cast, ceil, charToROWID, chr, chr, coalesce, compose, concat, concat, convert, convert, cos, cosh, currentDate, currentTime, dbTimeZone, decode, decompose, deref, div, div, div, div, div, dump, eq, eq, eq, eq, eq, exp, extractDay, extractHour, extractMinute, extractMonth, extractSecond, extractTimeZoneAbbr, extractTimeZoneHour, extractTimeZoneMinute, extractTimeZoneRegion, extractYear, floor, fromTZ, ge, ge, ge, ge, ge, getDataType, greatest, gt, gt, gt, gt, gt, hexToRAW, in, initcap, instr, instr2, instr4, instrB, instrC, isInfinite, isNAN, isNotNull, isNull, lastDay, le, le, le, le, le, least, length, length2, length4, lengthB, lengthC, like, like, like2, like4, likeC, ln, localTimestamp, log, lower, lpad, lt, lt, lt, lt, lt, ltrim, minus, minus, minus, minus, minus, minus, mod, monthsBetween, nanvl, ne, ne, ne, ne, ne, newTime, nextDay, nlsCharsetDeclLen, nlsCharsetID, nlsCharsetName, nlsInitcap, nlsLower, nlsSort, nlsUpper, notIn, nullIf, numToDSInterval, numToYMInterval, nvl, nvl2, oraHash, plus, plus, plus, plus, plus, power, rawToHex, rawToNHex, regexpInstr, regexpReplace, regexpSubstr, remainder, replace, round, rowIDToChar, rowIDToNChar, rpad, rtrim, scnToTimestamp, sessionTimeZone, sign, sin, sinh, soundex, sqrt, substr, substr2, substr4, substrB, substrC, sysContext, sysDate, sysExtractUTC, sysGUID, sysTimestamp, sysTypeID, tan, tanh, times, times, times, times, times, timestampToSCN, toBinaryDouble, toBinaryFloat, toChar, toChar, toCLOB, toDate, toDate, toDSInterval, toLOB, toMultiByte, toNChar, toNChar, toNCLOB, toNumber, toNumber, toNumber, toSingleByte, toTimestamp, toTimestampTZ, toYMInterval, translate, translateUsingCharCS, translateUsingNCharCS, treat, trim, trimLeading, trimTrailing, trunc, tzOffset, UID, unistr, upper, USER, userEnv, vsize, widthBucket

 

Methods inherited from class oracle.olapi.syntax.SyntaxObject
equals, equals, fromSyntax, fromSyntax, fromSyntax, fromSyntax, fromSyntax, isValid, toSyntax, toSyntax, toSyntax, toSyntax, toSyntax, toSyntax

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

INSTANCE

public static final NullExpression INSTANCE
A constant that represents an instance of this class.

Method Detail

visit

public java.lang.Object visit(SyntaxObjectVisitor visitor,
                              java.lang.Object context)
Calls the visitNullExpression method of the SyntaxObjectVisitor and passes that method this NullExpression and an Object.
Specified by:
visit in class SyntaxObject
Parameters:
visitor - A SyntaxObjectVisitor.
context - An Object.
Returns:
The Object returned by the visitNullExpression method.

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