public class SqlCharStringLiteral extends SqlAbstractStringLiteral
Its SqlLiteral.value
field is an NlsString
and SqlLiteral.typeName
is
SqlTypeName.CHAR
.
SqlLiteral.SqlSymbol
value
EMPTY_ARRAY, pos
Modifier | Constructor and Description |
---|---|
protected |
SqlCharStringLiteral(NlsString val,
SqlParserPos pos) |
Modifier and Type | Method and Description |
---|---|
SqlCharStringLiteral |
clone(SqlParserPos pos)
Clones a SqlNode with a different position.
|
protected SqlAbstractStringLiteral |
concat1(java.util.List<SqlLiteral> literals)
Helper routine for
SqlUtil.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.
|
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
clone, clone, cloneArray, equalDeep, equalDeep, equalsDeep, findValidOptions, getParserPosition, isA, toSqlString, toSqlString, toString, validateExpr
protected SqlCharStringLiteral(NlsString val, SqlParserPos pos)
public NlsString getNlsString()
public SqlCollation getCollation()
public SqlCharStringLiteral clone(SqlParserPos pos)
SqlNode
clone
in class SqlLiteral
public void unparse(SqlWriter writer, int leftPrec, int rightPrec)
SqlNode
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.apache.calcite.sql.SqlWriter, int, int)
.
unparse
in class SqlLiteral
writer
- Target writerleftPrec
- The precedence of the SqlNode
immediately
preceding this node in a depth-first scan of the parse
treerightPrec
- The precedence of the SqlNode
immediatelyprotected SqlAbstractStringLiteral concat1(java.util.List<SqlLiteral> literals)
SqlAbstractStringLiteral
SqlUtil.concatenateLiterals(java.util.List<org.apache.calcite.sql.SqlLiteral>)
.concat1
in class SqlAbstractStringLiteral
literals
- homogeneous StringLiteral argsCopyright © 2012–2019 The Apache Software Foundation. All rights reserved.