org.eigenbase.sql
Class SqlDateLiteral

java.lang.Object
  org.eigenbase.sql.SqlNode
      org.eigenbase.sql.SqlLiteral
          org.eigenbase.sql.SqlAbstractDateTimeLiteral
              org.eigenbase.sql.SqlDateLiteral

All Implemented Interfaces:

Cloneable

public class SqlDateLiteral
extends SqlAbstractDateTimeLiteral

A SQL literal representing a DATE value, such as DATE '2004-10-22'.

Create values using SqlLiteral.createDate(java.util.Calendar, org.eigenbase.sql.parser.SqlParserPos).

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/SqlDateLiteral.java#15 $

Author:

jhyde

Nested Class Summary

Nested classes/interfaces inherited from class org.eigenbase.sql.SqlLiteral

SqlLiteral.SqlSymbol

Field Summary

Fields inherited from class org.eigenbase.sql.SqlAbstractDateTimeLiteral

formatString, hasTimeZone, precision

Fields inherited from class org.eigenbase.sql.SqlLiteral

value

Fields inherited from class org.eigenbase.sql.SqlNode

emptyArray

Constructor Summary

SqlDateLiteral(Calendar d, SqlParserPos pos)

SqlDateLiteral(Calendar d, String format, SqlParserPos pos)

Method Summary

SqlNode	clone(SqlParserPos pos) Clones a SqlNode with a different position.
RelDataType	createSqlType(RelDataTypeFactory typeFactory)
String	toFormattedString() Returns e.g.
String	toString() Returns e.g.
void	unparse(SqlWriter writer, int leftPrec, int rightPrec) Writes a SQL representation of this node to a writer.

Methods inherited from class org.eigenbase.sql.SqlAbstractDateTimeLiteral

getCal, getDate, getPrec, getTime, getTimestamp, getTimeZone, toValue

Methods inherited from class org.eigenbase.sql.SqlLiteral

accept, bigDecimalValue, booleanValue, createApproxNumeric, createBinaryString, createBinaryString, createBoolean, createCharString, createCharString, createDate, createExactNumeric, createInterval, createNegative, createNull, createSample, createSymbol, createTime, createTimestamp, createUnknown, equals, equalsDeep, getKind, getMonotonicity, getStringValue, getTypeName, getValue, hashCode, intValue, longValue, sampleValue, stringValue, symbolValue, unescapeUnicode, validate, valueMatchesType

Methods inherited from class org.eigenbase.sql.SqlNode

clone, cloneArray, equalDeep, findValidOptions, getParserPosition, isA, toSqlString, toSqlString, validateExpr

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SqlDateLiteral

SqlDateLiteral(Calendar d,
               SqlParserPos pos)

SqlDateLiteral

SqlDateLiteral(Calendar d,
               String format,
               SqlParserPos pos)

Method Detail

clone

public SqlNode clone(SqlParserPos pos)

Description copied from class: SqlNode

Clones a SqlNode with a different position.

Overrides:

clone in class SqlLiteral

toString

public String toString()

Description copied from class: SqlAbstractDateTimeLiteral

Returns e.g. DATE '1969-07-21'.

Specified by:

toString in class SqlAbstractDateTimeLiteral

toFormattedString

public String toFormattedString()

Returns e.g. '1969-07-21'.

Specified by:

toFormattedString in class SqlAbstractDateTimeLiteral

createSqlType

public RelDataType createSqlType(RelDataTypeFactory typeFactory)

Overrides:

createSqlType in class SqlAbstractDateTimeLiteral

unparse

public void unparse(SqlWriter writer,
                    int leftPrec,
                    int rightPrec)

Description copied from class: SqlNode

Writes a SQL representation of this node to a writer.

The leftPrec and rightPrec parameters give us enough context to decide whether we need to enclose the expression in parentheses. For example, we need parentheses around "2 + 3" if preceded by "5 *". This is because the precedence of the "*" operator is greater than the precedence of the "+" operator.

The algorithm handles left- and right-associative operators by giving them slightly different left- and right-precedence.

If SqlWriter.isAlwaysUseParentheses() is true, we use parentheses even when they are not required by the precedence rules.

For the details of this algorithm, see SqlCall.unparse(org.eigenbase.sql.SqlWriter, int, int).

Overrides:

unparse in class SqlAbstractDateTimeLiteral

Parameters:

writer - Target writer

leftPrec - The precedence of the SqlNode immediately preceding this node in a depth-first scan of the parse tree

rightPrec - The precedence of the SqlNode immediately