Package org.apache.calcite.sql
Class SqlCharStringLiteral
- 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.SqlAbstractStringLiteral
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- org.apache.calcite.sql.SqlCharStringLiteral
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- All Implemented Interfaces:
java.lang.Cloneable
public class SqlCharStringLiteral extends SqlAbstractStringLiteral
A character string literal.Its
SqlLiteral.value
field is anNlsString
andSqlLiteral.typeName
isSqlTypeName.CHAR
.
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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
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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
SqlCharStringLiteral(NlsString val, SqlParserPos pos)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description SqlCharStringLiteral
clone(SqlParserPos pos)
Clones a SqlNode with a different position.protected SqlAbstractStringLiteral
concat1(java.util.List<SqlLiteral> literals)
Helper routine forSqlUtil.concatenateLiterals(java.util.List<org.apache.calcite.sql.SqlLiteral>)
.SqlCollation
getCollation()
NlsString
getNlsString()
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, 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, toString, validateExpr
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Constructor Detail
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SqlCharStringLiteral
protected SqlCharStringLiteral(NlsString val, SqlParserPos pos)
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Method Detail
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getNlsString
public NlsString getNlsString()
- Returns:
- the underlying NlsString
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getCollation
public SqlCollation getCollation()
- Returns:
- the collation
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clone
public SqlCharStringLiteral 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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concat1
protected SqlAbstractStringLiteral concat1(java.util.List<SqlLiteral> literals)
Description copied from class:SqlAbstractStringLiteral
Helper routine forSqlUtil.concatenateLiterals(java.util.List<org.apache.calcite.sql.SqlLiteral>)
.- Specified by:
concat1
in classSqlAbstractStringLiteral
- Parameters:
literals
- homogeneous StringLiteral args- Returns:
- StringLiteral with concatenated value. this == lits[0], used only for method dispatch.
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