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org.apache.derby.iapi.types
Interface ConcatableDataValue  

All Superinterfaces:

DataValueDescriptor, java.io.Externalizable, org.apache.derby.iapi.services.io.Formatable, Orderable, java.io.Serializable, org.apache.derby.iapi.services.io.Storable, org.apache.derby.iapi.services.io.TypedFormat, VariableSizeDataValue

All Known Subinterfaces:

BitDataValue, StringDataValue

All Known Implementing Classes:

SQLBinary, SQLChar

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public interface ConcatableDataValue

extends DataValueDescriptor, VariableSizeDataValue

The ConcatableDataValue interface corresponds to the SQL 92 string value data type. It is implemented by datatypes that have a length, and can be concatenated. It is implemented by the character datatypes and the bit datatypes. The following methods are defined herein: charLength() The following is defined by the sub classes (bit and char) concatenate()

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Field Summary

 

Fields inherited from interface org.apache.derby.iapi.types.Orderable

ORDER_OP_EQUALS, ORDER_OP_GREATEROREQUALS, ORDER_OP_GREATERTHAN, ORDER_OP_LESSOREQUALS, ORDER_OP_LESSTHAN

 

Fields inherited from interface org.apache.derby.iapi.types.VariableSizeDataValue

IGNORE_PRECISION

 

Method Summary
NumberDataValue	charLength(NumberDataValue result)           The SQL char_length() function.
ConcatableDataValue	substring(NumberDataValue start, NumberDataValue length, ConcatableDataValue result, int maxLen)           substr() function matchs DB2 syntax and behaviour.

 

Methods inherited from interface org.apache.derby.iapi.types.DataValueDescriptor

checkHostVariable, coalesce, compare, compare, equals, estimateMemoryUsage, getBoolean, getByte, getBytes, getClone, getDate, getDouble, getFloat, getInt, getLength, getLong, getNewNull, getObject, getShort, getStream, getString, getTime, getTimestamp, getTypeName, greaterOrEquals, greaterThan, in, isNotNull, isNullOp, lessOrEquals, lessThan, normalize, notEquals, readExternalFromArray, setBigDecimal, setInto, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValueFromResultSet, typePrecedence, typeToBigDecimal

 

Methods inherited from interface org.apache.derby.iapi.services.io.Storable

isNull, restoreToNull

 

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

 

Methods inherited from interface org.apache.derby.iapi.services.io.TypedFormat

getTypeFormatId

 

Methods inherited from interface org.apache.derby.iapi.types.VariableSizeDataValue

setWidth

 

Method Detail

charLength

public NumberDataValue charLength(NumberDataValue result)
                           throws org.apache.derby.iapi.error.StandardException

The SQL char_length() function.

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substring

public ConcatableDataValue substring(NumberDataValue start,
                                     NumberDataValue length,
                                     ConcatableDataValue result,
                                     int maxLen)
                              throws org.apache.derby.iapi.error.StandardException

substr() function matchs DB2 syntax and behaviour.

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