org.eigenbase.sql.type
Class AbstractSqlType

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

All Implemented Interfaces:

Serializable, Cloneable, RelDataType, RelDataTypeFamily

Direct Known Subclasses:

BasicSqlType, IntervalSqlType, MultisetSqlType, ObjectSqlType

public abstract class AbstractSqlType
extends RelDataTypeImpl
implements Cloneable, Serializable

Abstract base class for SQL implementations of RelDataType.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/type/AbstractSqlType.java#14 $

Author:

jhyde

See Also:

Serialized Form

Field Summary

protected boolean	isNullable
protected SqlTypeName	typeName

Fields inherited from class org.eigenbase.reltype.RelDataTypeImpl

digest, fieldList, fields

Constructor Summary

protected

AbstractSqlType(SqlTypeName typeName, boolean isNullable, RelDataTypeField[] fields) Creates an AbstractSqlType.

Method Summary

RelDataTypeFamily	getFamily() Gets a canonical object representing the family of this type.
RelDataTypePrecedenceList	getPrecedenceList()
SqlTypeName	getSqlTypeName() Gets the SqlTypeName of this type.
boolean	isNullable() Queries whether this type allows null values.

Methods inherited from class org.eigenbase.reltype.RelDataTypeImpl

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

Methods inherited from class java.lang.Object

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

Field Detail

typeName

protected final SqlTypeName typeName

isNullable

protected boolean isNullable

Constructor Detail

AbstractSqlType

protected AbstractSqlType(SqlTypeName typeName,
                          boolean isNullable,
                          RelDataTypeField[] fields)

Creates an AbstractSqlType.

Parameters:

typeName - Type name

isNullable - Whether nullable

fields - Fields of type, or null if not a record type

Method Detail

getSqlTypeName

public SqlTypeName getSqlTypeName()

Description copied from interface: RelDataType

Gets the SqlTypeName of this type.

Specified by:

getSqlTypeName in interface RelDataType

Overrides:

getSqlTypeName in class RelDataTypeImpl

Returns:

SqlTypeName, or null if this is not an SQL predefined type

isNullable

public boolean isNullable()

Description copied from interface: RelDataType

Queries whether this type allows null values.

Specified by:

isNullable in interface RelDataType

Overrides:

isNullable in class RelDataTypeImpl

Returns:

whether type allows null values

getFamily

public RelDataTypeFamily getFamily()

Description copied from interface: RelDataType

Gets a canonical object representing the family of this type. Two values can be compared if and only if their types are in the same family.

Specified by:

getFamily in interface RelDataType

Overrides:

getFamily in class RelDataTypeImpl

Returns:

canonical object representing type family

getPrecedenceList

public RelDataTypePrecedenceList getPrecedenceList()

Specified by:

getPrecedenceList in interface RelDataType

Overrides:

getPrecedenceList in class RelDataTypeImpl

Returns:

precedence list for this type