Package org.apache.calcite.sql
Class SqlAbstractDateTimeLiteral
java.lang.Object
org.apache.calcite.sql.SqlNode
org.apache.calcite.sql.SqlLiteral
org.apache.calcite.sql.SqlAbstractDateTimeLiteral
- All Implemented Interfaces:
Cloneable
- Direct Known Subclasses:
SqlDateLiteral
,SqlTimeLiteral
,SqlTimestampLiteral
,SqlTimestampTzLiteral
,SqlTimeTzLiteral
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
Nested classes/interfaces inherited from class org.apache.calcite.sql.SqlLiteral
SqlLiteral.SqlSymbol
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected final boolean
protected final int
Fields inherited from class org.apache.calcite.sql.SqlLiteral
value
Fields inherited from class org.apache.calcite.sql.SqlNode
EMPTY_ARRAY, pos
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Constructor Summary
ConstructorsModifierConstructorDescriptionprotected
SqlAbstractDateTimeLiteral
(Object d, boolean tz, SqlTypeName typeName, int precision, SqlParserPos pos) Constructs a datetime literal. -
Method Summary
Modifier and TypeMethodDescriptioncreateSqlType
(RelDataTypeFactory typeFactory) int
getPrec()
Converts this literal to aTimestampString
.abstract String
Returns e.g.abstract String
toString()
Returns e.g.void
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, createTime, createTimestamp, createTimestamp, createTimestamp, createTimestamp, createUnknown, createUnknown, equals, equalsDeep, getKind, getMonotonicity, getStringValue, getTypeName, getValue, getValueAs, hashCode, intValue, longValue, sampleValue, signum, stringValue, symbolValue, symbolValue_, toValue, unchain, unescapeUnicode, validate, value, valueMatchesType
Methods inherited from class org.apache.calcite.sql.SqlNode
clone, clone, cloneArray, equalDeep, equalDeep, equalsDeep, findValidOptions, getParserPosition, isA, toList, toList, toSqlString, toSqlString, toSqlString, unparseWithParentheses, validateExpr
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Field Details
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hasTimeZone
protected final boolean hasTimeZone -
precision
protected final int precision
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Constructor Details
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SqlAbstractDateTimeLiteral
protected SqlAbstractDateTimeLiteral(Object d, boolean tz, SqlTypeName typeName, int precision, SqlParserPos pos) Constructs a datetime literal.
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Method Details
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getTimestamp
Converts this literal to aTimestampString
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getPrec
public int getPrec() -
toString
Returns e.g.DATE '1969-07-21'
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toFormattedString
Returns e.g.1969-07-21
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createSqlType
- Overrides:
createSqlType
in classSqlLiteral
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unparse
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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