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java.lang.Objectorg.apache.derby.iapi.types.DataType
org.apache.derby.iapi.types.SQLChar
org.apache.derby.iapi.types.SQLVarchar
org.apache.derby.iapi.types.SQLLongvarchar
public class SQLLongvarchar
SQLLongvarchar represents a LONG VARCHAR value with UCS_BASIC collation. SQLLongvarchar is mostly the same as SQLVarchar, so it is implemented as a subclass of SQLVarchar. Only those methods with different behavior are implemented here.
Field Summary |
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Fields inherited from class org.apache.derby.iapi.types.SQLChar |
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_clobValue, arg_passer, CHAR_HEADER_GENERATOR, RETURN_SPACE_THRESHOLD, stream |
Fields inherited from interface org.apache.derby.iapi.types.StringDataValue |
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BOTH, COLLATION_DERIVATION_EXPLICIT, COLLATION_DERIVATION_IMPLICIT, COLLATION_DERIVATION_NONE, COLLATION_TYPE_TERRITORY_BASED, COLLATION_TYPE_TERRITORY_BASED_IDENTICAL, COLLATION_TYPE_TERRITORY_BASED_PRIMARY, COLLATION_TYPE_TERRITORY_BASED_SECONDARY, COLLATION_TYPE_TERRITORY_BASED_TERTIARY, COLLATION_TYPE_UCS_BASIC, LEADING, TRAILING |
Fields inherited from interface org.apache.derby.iapi.types.DataValueDescriptor |
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UNKNOWN_LOGICAL_LENGTH |
Fields inherited from interface org.apache.derby.iapi.types.Orderable |
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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 |
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IGNORE_PRECISION |
Constructor Summary | |
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SQLLongvarchar()
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SQLLongvarchar(java.lang.String val)
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Method Summary | |
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DataValueDescriptor |
cloneValue(boolean forceMaterialization)
Clone this DataValueDescriptor. |
StringDataValue |
concatenate(StringDataValue leftOperand,
StringDataValue rightOperand,
StringDataValue result)
The SQL concatenation '||' operator. |
DataValueDescriptor |
getNewNull()
Get a new null value of the same type as this data value. |
int |
getTypeFormatId()
Return my format identifier. |
java.lang.String |
getTypeName()
Get the SQL name of the datatype |
StringDataValue |
getValue(java.text.RuleBasedCollator collatorForComparison)
Gets either SQLChar/SQLVarchar/SQLLongvarchar/SQLClob(base classes) or CollatorSQLChar/CollatorSQLVarchar/CollatorSQLLongvarch/CollatorSQLClob (subclasses). |
protected void |
normalize(DataTypeDescriptor desiredType,
java.lang.String sourceValue)
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int |
typePrecedence()
Each built-in type in JSQL has a precedence. |
Methods inherited from class org.apache.derby.iapi.types.SQLVarchar |
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growBy, normalize |
Methods inherited from class org.apache.derby.iapi.types.DataType |
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checkHostVariable, coalesce, compare, compare, compareTo, dataTypeConversion, equals, flip, genericSetObject, getBytes, getNationalString, getTypeName, hasStream, in, invalidFormat, isNotNull, isNullOp, outOfRange, recycle, setInto, setObject, setToNull, setValue, setValue, setValue, setValue, setValue, throwLangSetMismatch, throwLangSetMismatch |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.apache.derby.iapi.types.DataValueDescriptor |
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checkHostVariable, coalesce, compare, compare, getBytes, hasStream, in, isNotNull, isNullOp, recycle, setInto, setToNull, setValue, setValue, setValue, setValue, setValue |
Constructor Detail |
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public SQLLongvarchar()
public SQLLongvarchar(java.lang.String val)
Method Detail |
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public java.lang.String getTypeName()
DataValueDescriptor
getTypeName
in interface DataValueDescriptor
getTypeName
in class SQLVarchar
public DataValueDescriptor cloneValue(boolean forceMaterialization)
DataValueDescriptor
Even though the objects can be modified independently regardless of the
value of forceMaterialization
, both the clone and the
original may be dependent on the store state if
forceMaterialization
is set to false
. An example is if
you need to access the value you just read using cloneValue
after the current transaction has ended, or after the source result set
has been closed.
cloneValue
in interface DataValueDescriptor
cloneValue
in class SQLVarchar
forceMaterialization
- any streams representing the data value will
be materialized if true
, the data value will be kept as a
stream if possible if false
DataValueDescriptor
with the same initial
value as this.DataValueDescriptor.cloneValue(boolean)
public DataValueDescriptor getNewNull()
DataValueDescriptor
getNewNull
in interface DataValueDescriptor
getNewNull
in class SQLVarchar
DataValueDescriptor.getNewNull()
public StringDataValue getValue(java.text.RuleBasedCollator collatorForComparison)
StringDataValue
getValue
in interface StringDataValue
getValue
in class SQLVarchar
StringDataValue.getValue(RuleBasedCollator)
public int getTypeFormatId()
getTypeFormatId
in interface TypedFormat
getTypeFormatId
in class SQLVarchar
TypedFormat.getTypeFormatId()
protected void normalize(DataTypeDescriptor desiredType, java.lang.String sourceValue) throws StandardException
normalize
in class SQLVarchar
StandardException
public StringDataValue concatenate(StringDataValue leftOperand, StringDataValue rightOperand, StringDataValue result) throws StandardException
StringDataValue
concatenate
in interface StringDataValue
concatenate
in class SQLChar
leftOperand
- String on the left hand side of '||'rightOperand
- String on the right hand side of '||'result
- The result of a previous call to this method,
null if not called yet.
StandardException
- Thrown on errorStringDataValue.concatenate(org.apache.derby.iapi.types.StringDataValue, org.apache.derby.iapi.types.StringDataValue, org.apache.derby.iapi.types.StringDataValue)
public int typePrecedence()
DataType
typePrecedence
in interface DataValueDescriptor
typePrecedence
in class SQLVarchar
DataValueDescriptor.typePrecedence()
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Built on Thu 2012-03-29 21:53:33+0000, from revision ??? | ||||||||
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