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

public abstract class SqlAbstractDateTimeLiteral
extends SqlLiteral

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'

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.sql.SqlLiteral

SqlLiteral.SqlSymbol

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	hasTimeZone
protected int	precision

Fields inherited from class org.apache.calcite.sql.SqlLiteral

value

Fields inherited from class org.apache.calcite.sql.SqlNode

EMPTY_ARRAY, pos

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SqlAbstractDateTimeLiteral(Object d, boolean tz, SqlTypeName typeName, int precision, SqlParserPos pos) Constructs a datetime literal.

Method Summary

Modifier and Type	Method and Description
RelDataType	createSqlType(RelDataTypeFactory typeFactory)
int	getPrec()
protected TimestampString	getTimestamp() Converts this literal to a TimestampString.
abstract String	toFormattedString() Returns e.g.
abstract String	toString() Returns e.g.
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, 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

Methods inherited from class org.apache.calcite.sql.SqlNode

clone, clone, cloneArray, equalDeep, equalDeep, equalsDeep, findValidOptions, getParserPosition, isA, toSqlString, toSqlString, validateExpr

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

hasTimeZone

protected final boolean hasTimeZone

precision

protected final int precision

Constructor Detail

SqlAbstractDateTimeLiteral

protected SqlAbstractDateTimeLiteral(Object d,
                                     boolean tz,
                                     SqlTypeName typeName,
                                     int precision,
                                     SqlParserPos pos)

Constructs a datetime literal.

Method Detail

getTimestamp

protected TimestampString getTimestamp()

Converts this literal to a TimestampString.

getPrec

public int getPrec()

toString

public abstract String toString()

Returns e.g. DATE '1969-07-21'.

Overrides:

toString in class SqlNode

toFormattedString

public abstract String toFormattedString()

Returns e.g. 1969-07-21.

createSqlType

public RelDataType createSqlType(RelDataTypeFactory typeFactory)

Overrides:

createSqlType in class SqlLiteral

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 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).

Overrides:

unparse in class SqlLiteral

Parameters:

writer - Target writer

leftPrec - The precedence of the SqlNode immediately preceding this node in a depth-first scan of the parse tree

rightPrec - The precedence of the SqlNode immediately