public abstract class SqlAbstractDateTimeLiteral extends SqlLiteral
Examples:
TIMESTAMP '1969-07-21 03:15 GMT'
SqlLiteral.SqlSymbol
Modifier and Type | Field and Description |
---|---|
protected boolean |
hasTimeZone |
protected int |
precision |
value
EMPTY_ARRAY, pos
Modifier | Constructor and Description |
---|---|
protected |
SqlAbstractDateTimeLiteral(java.lang.Object d,
boolean tz,
SqlTypeName typeName,
int precision,
SqlParserPos pos)
Constructs a datetime literal.
|
Modifier and Type | Method and Description |
---|---|
RelDataType |
createSqlType(RelDataTypeFactory typeFactory) |
int |
getPrec() |
protected TimestampString |
getTimestamp()
Converts this literal to a
TimestampString . |
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.
|
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
clone, clone, cloneArray, equalDeep, equalDeep, equalsDeep, findValidOptions, getParserPosition, isA, toSqlString, toSqlString, validateExpr
protected final boolean hasTimeZone
protected final int precision
protected SqlAbstractDateTimeLiteral(java.lang.Object d, boolean tz, SqlTypeName typeName, int precision, SqlParserPos pos)
protected TimestampString getTimestamp()
TimestampString
.public int getPrec()
public abstract java.lang.String toString()
DATE '1969-07-21'
.public abstract java.lang.String toFormattedString()
1969-07-21
.public RelDataType createSqlType(RelDataTypeFactory typeFactory)
createSqlType
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
immediatelyCopyright © 2012–2019 The Apache Software Foundation. All rights reserved.