Package org.apache.calcite.sql
Class SqlAbstractDateTimeLiteral
- java.lang.Object
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- org.apache.calcite.sql.SqlNode
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- org.apache.calcite.sql.SqlLiteral
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- org.apache.calcite.sql.SqlAbstractDateTimeLiteral
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- All Implemented Interfaces:
java.lang.Cloneable
- Direct Known Subclasses:
SqlDateLiteral
,SqlTimeLiteral
,SqlTimestampLiteral
public abstract class SqlAbstractDateTimeLiteral extends SqlLiteral
A SQL literal representing a DATE, TIME or TIMESTAMP value.Examples:
- DATE '2004-10-22'
- TIME '14:33:44.567'
TIMESTAMP '1969-07-21 03:15 GMT'
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.calcite.sql.SqlLiteral
SqlLiteral.SqlSymbol
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Field Summary
Fields Modifier and Type Field Description protected boolean
hasTimeZone
protected int
precision
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Fields inherited from class org.apache.calcite.sql.SqlLiteral
value
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Fields inherited from class org.apache.calcite.sql.SqlNode
EMPTY_ARRAY, pos
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Constructor Summary
Constructors Modifier Constructor Description protected
SqlAbstractDateTimeLiteral(java.lang.Object d, boolean tz, SqlTypeName typeName, int precision, SqlParserPos pos)
Constructs a datetime literal.
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description RelDataType
createSqlType(RelDataTypeFactory typeFactory)
int
getPrec()
protected TimestampString
getTimestamp()
Converts this literal to aTimestampString
.abstract java.lang.String
toFormattedString()
Returns e.g.abstract java.lang.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.apache.calcite.sql.SqlLiteral
accept, bigDecimalValue, booleanValue, clone, createApproxNumeric, createBinaryString, createBinaryString, createBoolean, createCharString, createCharString, createDate, createDate, createExactNumeric, createInterval, createNegative, createNull, createSample, createSymbol, createTime, createTime, createTimestamp, createTimestamp, createUnknown, equals, equalsDeep, getKind, getMonotonicity, getStringValue, getTypeName, getValue, getValueAs, hashCode, intValue, longValue, sampleValue, signum, stringValue, symbolValue, symbolValue_, toValue, unchain, unescapeUnicode, validate, value, valueMatchesType
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Methods inherited from class org.apache.calcite.sql.SqlNode
clone, clone, cloneArray, equalDeep, equalDeep, equalsDeep, findValidOptions, getParserPosition, isA, toSqlString, toSqlString, validateExpr
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Constructor Detail
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SqlAbstractDateTimeLiteral
protected SqlAbstractDateTimeLiteral(java.lang.Object d, boolean tz, SqlTypeName typeName, int precision, SqlParserPos pos)
Constructs a datetime literal.
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Method Detail
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getTimestamp
protected TimestampString getTimestamp()
Converts this literal to aTimestampString
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getPrec
public int getPrec()
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toString
public abstract java.lang.String toString()
Returns e.g.DATE '1969-07-21'
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toFormattedString
public abstract java.lang.String toFormattedString()
Returns e.g.1969-07-21
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createSqlType
public RelDataType createSqlType(RelDataTypeFactory typeFactory)
- Overrides:
createSqlType
in classSqlLiteral
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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
andrightPrec
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.apache.calcite.sql.SqlWriter, int, int)
.- Overrides:
unparse
in classSqlLiteral
- Parameters:
writer
- Target writerleftPrec
- The precedence of theSqlNode
immediately preceding this node in a depth-first scan of the parse treerightPrec
- The precedence of theSqlNode
immediately
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