org.eigenbase.sql.type
Class IntervalSqlType

java.lang.Object
  org.eigenbase.reltype.RelDataTypeImpl
      org.eigenbase.sql.type.AbstractSqlType
          org.eigenbase.sql.type.IntervalSqlType

All Implemented Interfaces:

Serializable, Cloneable, RelDataType, RelDataTypeFamily

public class IntervalSqlType
extends AbstractSqlType

IntervalSqlType represents a standard SQL datetime interval type.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/type/IntervalSqlType.java#16 $

Author:

wael

See Also:

Serialized Form

Field Summary

private SqlIntervalQualifier

intervalQualifier

Fields inherited from class org.eigenbase.sql.type.AbstractSqlType

isNullable, typeName

Fields inherited from class org.eigenbase.reltype.RelDataTypeImpl

digest, fieldList, fields

Constructor Summary

IntervalSqlType(SqlIntervalQualifier intervalQualifier, boolean isNullable)
Constructs an IntervalSqlType.

Method Summary

IntervalSqlType	combine(RelDataTypeFactoryImpl typeFactory, IntervalSqlType that) Combines two IntervalTypes and returns the result.
protected void	generateTypeString(StringBuilder sb, boolean withDetail) Generates a string representation of this type.
SqlIntervalQualifier	getIntervalQualifier() Gets this type's interval qualifier, or null if this is not an interval type.
int	getPrecision() Gets the JDBC-defined precision for values of this type.

Methods inherited from class org.eigenbase.sql.type.AbstractSqlType

getFamily, getPrecedenceList, getSqlTypeName, isNullable

Methods inherited from class org.eigenbase.reltype.RelDataTypeImpl

computeDigest, equals, getCharset, getCollation, getComparability, getComponentType, getField, getFieldCount, getFieldList, getFieldOrdinal, getFields, getFullTypeString, getScale, getSqlIdentifier, hashCode, isStruct, toString

Methods inherited from class java.lang.Object

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

Field Detail

intervalQualifier

private SqlIntervalQualifier intervalQualifier

Constructor Detail

IntervalSqlType

public IntervalSqlType(SqlIntervalQualifier intervalQualifier,
                       boolean isNullable)

Constructs an IntervalSqlType. This should only be called from a factory method.

Method Detail

generateTypeString

protected void generateTypeString(StringBuilder sb,
                                  boolean withDetail)

Description copied from class: RelDataTypeImpl

Generates a string representation of this type.

Specified by:

generateTypeString in class RelDataTypeImpl

Parameters:

sb - StringBuffer into which to generate the string

withDetail - when true, all detail information needed to compute a unique digest (and return from getFullTypeString) should be included;

getIntervalQualifier

public SqlIntervalQualifier getIntervalQualifier()

Description copied from interface: RelDataType

Gets this type's interval qualifier, or null if this is not an interval type.

Specified by:

getIntervalQualifier in interface RelDataType

Overrides:

getIntervalQualifier in class RelDataTypeImpl

Returns:

interval qualifier

combine

public IntervalSqlType combine(RelDataTypeFactoryImpl typeFactory,
                               IntervalSqlType that)

Combines two IntervalTypes and returns the result. E.g. the result of combining
INTERVAL DAY TO HOUR
with
INTERVAL SECOND is
INTERVAL DAY TO SECOND

getPrecision

public int getPrecision()

Description copied from interface: RelDataType

Gets the JDBC-defined precision for values of this type. Note that this is not always the same as the user-specified precision. For example, the type INTEGER has no user-specified precision, but this method returns 10 for an INTEGER type.

Specified by:

getPrecision in interface RelDataType

Overrides:

getPrecision in class RelDataTypeImpl

Returns:

number of decimal digits for exact numeric types; number of decimal digits in mantissa for approximate numeric types; number of decimal digits for fractional seconds of datetime types; length in characters for character types; length in bytes for binary types; length in bits for bit types; 1 for BOOLEAN