java.lang.Object
org.apache.derby.iapi.types.DataType
org.apache.derby.iapi.types.SQLBinary
org.apache.derby.iapi.types.SQLBit
org.apache.derby.iapi.types.SQLVarbit
org.apache.derby.iapi.types.SQLLongVarbit
- All Implemented Interfaces:
- BitDataValue, CloneableObject, ConcatableDataValue, 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.StreamStorable, org.apache.derby.iapi.services.io.TypedFormat, VariableSizeDataValue
- public class SQLLongVarbit
- extends SQLVarbit
SQLLongVarbit satisfies the DataValueDescriptor
interfaces (i.e., OrderableDataType). It implements a String holder,
e.g. for storing a column value; it can be specified
when constructed to not allow nulls. Nullability cannot be changed
after construction.
Because OrderableDataType is a subclass of DataType,
SQLLongVarbit can play a role in either a DataType/Value
or a OrderableDataType/KeyRow, interchangeably.
It is an extension of SQLVarbit and is virtually indistinguishable
other than normalization.
| Methods inherited from class org.apache.derby.iapi.types.SQLBinary |
charLength, checkHostVariable, cloneObject, compare, compare, concatenate, equals, estimateMemoryUsage, getBytes, getClone, getLength, getStream, getString, getValue, greaterOrEquals, greaterThan, hashCode, isNull, lessOrEquals, lessThan, loadStream, notEquals, objectNull, readExternal, readExternalFromArray, restoreToNull, returnStream, setFrom, setInto, setStream, setValue, setValue, substring, toString, writeExternal |
| Methods inherited from class org.apache.derby.iapi.types.DataType |
coalesce, dataTypeConversion, equals, flip, genericSetObject, getBoolean, getByte, getDate, getDouble, getFloat, getInt, getLong, getNationalString, getShort, getTime, getTimestamp, in, invalidFormat, isNotNull, isNullOp, outOfRange, setBigDecimal, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, throwLangSetMismatch, throwLangSetMismatch, typeToBigDecimal |
| Methods inherited from interface org.apache.derby.iapi.types.DataValueDescriptor |
coalesce, getBoolean, getByte, getDate, getDouble, getFloat, getInt, getLong, getShort, getTime, getTimestamp, in, isNotNull, isNullOp, setBigDecimal, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, typeToBigDecimal |
SQLLongVarbit
public SQLLongVarbit()
SQLLongVarbit
public SQLLongVarbit(byte[] val)
getTypeName
public java.lang.String getTypeName()
- Description copied from interface:
DataValueDescriptor
- Get the SQL name of the datatype
- Specified by:
getTypeName in interface DataValueDescriptor- Overrides:
getTypeName in class SQLVarbit
getNewNull
public DataValueDescriptor getNewNull()
- Description copied from interface:
DataValueDescriptor
- Get a new null value of the same type as this data value.
- Specified by:
getNewNull in interface DataValueDescriptor- Overrides:
getNewNull in class SQLVarbit
setValueFromResultSet
public void setValueFromResultSet(java.sql.ResultSet resultSet,
int colNumber,
boolean isNullable)
throws java.sql.SQLException
- Description copied from interface:
DataValueDescriptor
- Set the value based on the value for the specified DataValueDescriptor
from the specified ResultSet.
- Specified by:
setValueFromResultSet in interface DataValueDescriptor- Overrides:
setValueFromResultSet in class SQLBit
getTypeFormatId
public int getTypeFormatId()
- Return my format identifier.
- Specified by:
getTypeFormatId in interface org.apache.derby.iapi.services.io.TypedFormat- Overrides:
getTypeFormatId in class SQLVarbit
normalize
public void normalize(DataTypeDescriptor desiredType,
DataValueDescriptor source)
throws org.apache.derby.iapi.error.StandardException
- Normalization method - this method may be called when putting
a value into a SQLVarbit, for example, when inserting into a SQLVarbit
column. See NormalizeResultSet in execution.
This overrides SQLBit -- the difference is that we don't
expand SQLVarbits to fit the target.
- Specified by:
normalize in interface DataValueDescriptor- Overrides:
normalize in class SQLVarbit
typePrecedence
public int typePrecedence()
- Description copied from interface:
DataValueDescriptor
- Each built-in type in JSQL has a precedence. This precedence determines
how to do type promotion when using binary operators. For example, float
has a higher precedence than int, so when adding an int to a float, the
result type is float.
The precedence for some types is arbitrary. For example, it doesn't
matter what the precedence of the boolean type is, since it can't be
mixed with other types. But the precedence for the number types is
critical. The SQL standard requires that exact numeric types be
promoted to approximate numeric when one operator uses both. Also,
the precedence is arranged so that one will not lose precision when
promoting a type.
- Specified by:
typePrecedence in interface DataValueDescriptor- Overrides:
typePrecedence in class SQLVarbit
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