Class SqlIntervalLiteral
- 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.SqlIntervalLiteral
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- All Implemented Interfaces:
java.lang.Cloneable
public class SqlIntervalLiteral extends SqlLiteral
A SQL literal representing a time interval.Examples:
- INTERVAL '1' SECOND
- INTERVAL '1:00:05.345' HOUR
- INTERVAL '3:4' YEAR TO MONTH
YEAR/MONTH intervals are not implemented yet.
The interval string, such as '1:00:05.345', is not parsed yet.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
SqlIntervalLiteral.IntervalValue
A Interval value.-
Nested classes/interfaces inherited from class org.apache.calcite.sql.SqlLiteral
SqlLiteral.SqlSymbol
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Field Summary
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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
SqlIntervalLiteral(int sign, java.lang.String intervalStr, SqlIntervalQualifier intervalQualifier, SqlTypeName sqlTypeName, SqlParserPos pos)
private
SqlIntervalLiteral(SqlIntervalLiteral.IntervalValue intervalValue, SqlTypeName sqlTypeName, SqlParserPos pos)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description SqlIntervalLiteral
clone(SqlParserPos pos)
Clones a SqlNode with a different position.int
signum()
Returns sign of value.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, createApproxNumeric, createBinaryString, createBinaryString, createBoolean, createCharString, createCharString, createDate, createDate, createExactNumeric, createInterval, createNegative, createNull, createSample, createSqlType, createSymbol, createTime, createTime, createTimestamp, createTimestamp, createUnknown, equals, equalsDeep, getKind, getMonotonicity, getStringValue, getTypeName, getValue, getValueAs, hashCode, intValue, longValue, sampleValue, 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, toString, validateExpr
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Constructor Detail
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SqlIntervalLiteral
protected SqlIntervalLiteral(int sign, java.lang.String intervalStr, SqlIntervalQualifier intervalQualifier, SqlTypeName sqlTypeName, SqlParserPos pos)
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SqlIntervalLiteral
private SqlIntervalLiteral(SqlIntervalLiteral.IntervalValue intervalValue, SqlTypeName sqlTypeName, SqlParserPos pos)
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Method Detail
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clone
public SqlIntervalLiteral clone(SqlParserPos pos)
Description copied from class:SqlNode
Clones a SqlNode with a different position.- Overrides:
clone
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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signum
public int signum()
Description copied from class:SqlLiteral
Returns sign of value.- Overrides:
signum
in classSqlLiteral
- Returns:
- -1, 0 or 1
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