|
JavaTM 2 Platform Std. Ed. v1.3.1 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
A table of data representing a database result set, which is usually generated by executing a statement that queries the database.
A ResultSet
object maintains a cursor pointing
to its current row of data. Initially the cursor is positioned
before the first row. The next
method moves the
cursor to the next row, and because it returns false
when there are no more rows in the ResultSet
object,
it can be used in a while
loop to iterate through
the result set.
A default ResultSet
object is not updatable and
has a cursor that moves forward only. Thus, it is possible to
iterate through it only once and only from the first row to the
last row. New methods in the JDBC 2.0 API make it possible to
produce ResultSet
objects that are scrollable and/or
updatable. The following code fragment, in which con
is a valid Connection
object, illustrates how to make
a result set that is scrollable and insensitive to updates by others, and
that is updatable. See ResultSet
fields for other
options.
Statement stmt = con.createStatement( ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = stmt.executeQuery("SELECT a, b FROM TABLE2"); // rs will be scrollable, will not show changes made by others, // and will be updatableThe
ResultSet
interface provides
getXXX
methods for retrieving column values from
the current row.
Values can be retrieved using either the index number of the
column or the name of the column. In general, using the
column index will be more efficient. Columns are numbered from 1.
For maximum portability, result set columns within each row should be
read in left-to-right order, and each column should be read only once.
For the getXXX
methods, a JDBC driver attempts
to convert the underlying data to the Java type specified in the
XXX
part of the getXXX
method and
returns a suitable Java value. The JDBC specification
has a table showing the allowable mappings
from SQL types to Java types with the ResultSet.getXXX
methods.
Column names used as input to getXXX
methods are case
insensitive. When a getXXX
method is called with
a column name and several columns have the same name,
the value of the first matching column will be returned.
The column name option is
designed to be used when column names are used in the SQL
query that generated the result set.
For columns that are NOT explicitly named in the query, it
is best to use column numbers. If column names are used, there is
no way for the programmer to guarantee that they actually refer to
the intended columns.
A set of updateXXX
methods were added to this interface
in the JDBC 2.0 API (JavaTM 2 SDK,
Standard Edition, version 1.2). The comments regarding parameters
to the getXXX
methods also apply to parameters to the
updateXXX
methods.
The updateXXX
methods may be used in two ways:
ResultSet
object, the cursor can be moved backwards
and forwards, to an absolute position, or to a position
relative to the current row.
The following code fragment updates the NAME
column
in the fifth row of the ResultSet
object
rs
and then uses the method updateRow
to update the data source table from which rs
was derived.
rs.absolute(5); // moves the cursor to the fifth row of rs rs.updateString("NAME", "AINSWORTH"); // updates the //NAME
column of row 5 to beAINSWORTH
rs.updateRow(); // updates the row in the data source
ResultSet
object has a special row associated with
it that serves as a staging area for building a row to be inserted.
The following code fragment moves the cursor to the insert row, builds
a three-column row, and inserts it into rs
and into
the data source table using the method insertRow
.
rs.moveToInsertRow(); // moves cursor to the insert row rs.updateString(1, "AINSWORTH"); // updates the // first column of the insert row to beAINSWORTH
rs.updateInt(2,35); // updates the second column to be35
rs.updateBoolean(3, true); // updates the third row totrue
rs.insertRow(); rs.moveToCurrentRow();
A ResultSet
object is automatically closed when the
Statement
object that
generated it is closed, re-executed, or used
to retrieve the next result from a sequence of multiple results.
The number, types and properties of a ResultSet
object's columns are provided by the ResulSetMetaData
object returned by the ResultSet.getMetaData
method.
Statement.executeQuery(java.lang.String)
,
Statement.getResultSet()
,
ResultSetMetaData
Field Summary | |
static int |
CONCUR_READ_ONLY
The constant indicating the concurrency mode for a ResultSet object that may NOT be updated. |
static int |
CONCUR_UPDATABLE
The constant indicating the concurrency mode for a ResultSet object that may be updated. |
static int |
FETCH_FORWARD
The constant indicating that the rows in a result set will be processed in a forward direction; first-to-last. |
static int |
FETCH_REVERSE
The constant indicating that the rows in a result set will be processed in a reverse direction; last-to-first. |
static int |
FETCH_UNKNOWN
The constant indicating that the order in which rows in a result set will be processed is unknown. |
static int |
TYPE_FORWARD_ONLY
The constant indicating the type for a ResultSet object
whose cursor may move only forward. |
static int |
TYPE_SCROLL_INSENSITIVE
The constant indicating the type for a ResultSet object
that is scrollable but generally not sensitive to changes made by others. |
static int |
TYPE_SCROLL_SENSITIVE
The constant indicating the type for a ResultSet object
that is scrollable and generally sensitive to changes made by others. |
Method Summary | |
boolean |
absolute(int row)
Moves the cursor to the given row number in this ResultSet object. |
void |
afterLast()
Moves the cursor to the end of this ResultSet object, just after the
last row. |
void |
beforeFirst()
Moves the cursor to the front of this ResultSet object, just before the
first row. |
void |
cancelRowUpdates()
Cancels the updates made to the current row in this ResultSet object. |
void |
clearWarnings()
Clears all warnings reported on this ResultSet object. |
void |
close()
Releases this ResultSet object's database and
JDBC resources immediately instead of waiting for
this to happen when it is automatically closed. |
void |
deleteRow()
Deletes the current row from this ResultSet object
and from the underlying database. |
int |
findColumn(String columnName)
Maps the given ResultSet column name to its
ResultSet column index. |
boolean |
first()
Moves the cursor to the first row in this ResultSet object. |
Array |
getArray(int i)
Returns the value of the designated column in the current row of this ResultSet object as an Array object
in the Java programming language. |
Array |
getArray(String colName)
Returns the value of the designated column in the current row of this ResultSet object as an Array object
in the Java programming language. |
InputStream |
getAsciiStream(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a stream of ASCII characters. |
InputStream |
getAsciiStream(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as a stream of
ASCII characters. |
BigDecimal |
getBigDecimal(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as a
java.math.BigDecimal with full precision. |
BigDecimal |
getBigDecimal(int columnIndex,
int scale)
Deprecated. |
BigDecimal |
getBigDecimal(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as a
java.math.BigDecimal with full precision. |
BigDecimal |
getBigDecimal(String columnName,
int scale)
Deprecated. |
InputStream |
getBinaryStream(int columnIndex)
Gets the value of a column in the current row as a stream of Gets the value of the designated column in the current row of this ResultSet object as a binary stream of
uninterpreted bytes. |
InputStream |
getBinaryStream(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as a stream of uninterpreted
byte s. |
Blob |
getBlob(int i)
Returns the value of the designated column in the current row of this ResultSet object as a Blob object
in the Java programming language. |
Blob |
getBlob(String colName)
Returns the value of the designated column in the current row of this ResultSet object as a Blob object
in the Java programming language. |
boolean |
getBoolean(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a boolean in the Java programming language. |
boolean |
getBoolean(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a boolean in the Java programming language. |
byte |
getByte(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a byte in the Java programming language. |
byte |
getByte(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a byte in the Java programming language. |
byte[] |
getBytes(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a byte array in the Java programming language. |
byte[] |
getBytes(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a byte array in the Java programming language. |
Reader |
getCharacterStream(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as a
java.io.Reader object. |
Reader |
getCharacterStream(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as a
java.io.Reader object. |
Clob |
getClob(int i)
Returns the value of the designated column in the current row of this ResultSet object as a Clob object
in the Java programming language. |
Clob |
getClob(String colName)
Returns the value of the designated column in the current row of this ResultSet object as a Clob object
in the Java programming language. |
int |
getConcurrency()
Returns the concurrency mode of this ResultSet object. |
String |
getCursorName()
Gets the name of the SQL cursor used by this ResultSet
object. |
Date |
getDate(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a java.sql.Date object in the Java programming language. |
Date |
getDate(int columnIndex,
Calendar cal)
Returns the value of the designated column in the current row of this ResultSet object as a java.sql.Date object
in the Java programming language. |
Date |
getDate(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a java.sql.Date object in the Java programming language. |
Date |
getDate(String columnName,
Calendar cal)
Returns the value of the designated column in the current row of this ResultSet object as a java.sql.Date object
in the Java programming language. |
double |
getDouble(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a double in the Java programming language. |
double |
getDouble(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a double in the Java programming language. |
int |
getFetchDirection()
Returns the fetch direction for this ResultSet object. |
int |
getFetchSize()
Returns the fetch size for this ResultSet object. |
float |
getFloat(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a float in the Java programming language. |
float |
getFloat(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a float in the Java programming language. |
int |
getInt(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
an int in the Java programming language. |
int |
getInt(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
an int in the Java programming language. |
long |
getLong(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a long in the Java programming language. |
long |
getLong(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a long in the Java programming language. |
ResultSetMetaData |
getMetaData()
Retrieves the number, types and properties of this ResultSet object's columns. |
Object |
getObject(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
an Object in the Java programming language. |
Object |
getObject(int i,
Map map)
Returns the value of the designated column in the current row of this ResultSet object as an Object
in the Java programming language. |
Object |
getObject(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
an Object in the Java programming language. |
Object |
getObject(String colName,
Map map)
Returns the value of the designated column in the current row of this ResultSet object as an Object
in the Java programming language. |
Ref |
getRef(int i)
Returns the value of the designated column in the current row of this ResultSet object as a Ref object
in the Java programming language. |
Ref |
getRef(String colName)
Returns the value of the designated column in the current row of this ResultSet object as a Ref object
in the Java programming language. |
int |
getRow()
Retrieves the current row number. |
short |
getShort(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a short in the Java programming language. |
short |
getShort(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a short in the Java programming language. |
Statement |
getStatement()
Returns the Statement object that produced this
ResultSet object. |
String |
getString(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a String in the Java programming language. |
String |
getString(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a String in the Java programming language. |
Time |
getTime(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a java.sql.Time object in the Java programming language. |
Time |
getTime(int columnIndex,
Calendar cal)
Returns the value of the designated column in the current row of this ResultSet object as a java.sql.Time object
in the Java programming language. |
Time |
getTime(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a java.sql.Time object in the Java programming language. |
Time |
getTime(String columnName,
Calendar cal)
Returns the value of the designated column in the current row of this ResultSet object as a java.sql.Time object
in the Java programming language. |
Timestamp |
getTimestamp(int columnIndex)
Gets the value of the designated column in the current row of this ResultSet object as
a java.sql.Timestamp object in the Java programming language. |
Timestamp |
getTimestamp(int columnIndex,
Calendar cal)
Returns the value of the designated column in the current row of this ResultSet object as a java.sql.Timestamp object
in the Java programming language. |
Timestamp |
getTimestamp(String columnName)
Gets the value of the designated column in the current row of this ResultSet object as
a java.sql.Timestamp object. |
Timestamp |
getTimestamp(String columnName,
Calendar cal)
Returns the value of the designated column in the current row of this ResultSet object as a java.sql.Timestamp object
in the Java programming language. |
int |
getType()
Returns the type of this ResultSet object. |
InputStream |
getUnicodeStream(int columnIndex)
Deprecated. use getCharacterStream in place of
getUnicodeStream |
InputStream |
getUnicodeStream(String columnName)
Deprecated. |
SQLWarning |
getWarnings()
Returns the first warning reported by calls on this ResultSet object. |
void |
insertRow()
Inserts the contents of the insert row into this ResultSet objaect and into the database. |
boolean |
isAfterLast()
Indicates whether the cursor is after the last row in this ResultSet object. |
boolean |
isBeforeFirst()
Indicates whether the cursor is before the first row in this ResultSet object. |
boolean |
isFirst()
Indicates whether the cursor is on the first row of this ResultSet object. |
boolean |
isLast()
Indicates whether the cursor is on the last row of this ResultSet object. |
boolean |
last()
Moves the cursor to the last row in this ResultSet object. |
void |
moveToCurrentRow()
Moves the cursor to the remembered cursor position, usually the current row. |
void |
moveToInsertRow()
Moves the cursor to the insert row. |
boolean |
next()
Moves the cursor down one row from its current position. |
boolean |
previous()
Moves the cursor to the previous row in this ResultSet object. |
void |
refreshRow()
Refreshes the current row with its most recent value in the database. |
boolean |
relative(int rows)
Moves the cursor a relative number of rows, either positive or negative. |
boolean |
rowDeleted()
Indicates whether a row has been deleted. |
boolean |
rowInserted()
Indicates whether the current row has had an insertion. |
boolean |
rowUpdated()
Indicates whether the current row has been updated. |
void |
setFetchDirection(int direction)
Gives a hint as to the direction in which the rows in this ResultSet object will be processed. |
void |
setFetchSize(int rows)
Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed for this ResultSet object. |
void |
updateAsciiStream(int columnIndex,
InputStream x,
int length)
Updates the designated column with an ascii stream value. |
void |
updateAsciiStream(String columnName,
InputStream x,
int length)
Updates the designated column with an ascii stream value. |
void |
updateBigDecimal(int columnIndex,
BigDecimal x)
Updates the designated column with a java.math.BigDecimal
value. |
void |
updateBigDecimal(String columnName,
BigDecimal x)
Updates the designated column with a java.sql.BigDecimal
value. |
void |
updateBinaryStream(int columnIndex,
InputStream x,
int length)
Updates the designated column with a binary stream value. |
void |
updateBinaryStream(String columnName,
InputStream x,
int length)
Updates the designated column with a binary stream value. |
void |
updateBoolean(int columnIndex,
boolean x)
Updates the designated column with a boolean value. |
void |
updateBoolean(String columnName,
boolean x)
Updates the designated column with a boolean value. |
void |
updateByte(int columnIndex,
byte x)
Updates the designated column with a byte value. |
void |
updateByte(String columnName,
byte x)
Updates the designated column with a byte value. |
void |
updateBytes(int columnIndex,
byte[] x)
Updates the designated column with a byte array value. |
void |
updateBytes(String columnName,
byte[] x)
Updates the designated column with a boolean value. |
void |
updateCharacterStream(int columnIndex,
Reader x,
int length)
Updates the designated column with a character stream value. |
void |
updateCharacterStream(String columnName,
Reader reader,
int length)
Updates the designated column with a character stream value. |
void |
updateDate(int columnIndex,
Date x)
Updates the designated column with a java.sql.Date value. |
void |
updateDate(String columnName,
Date x)
Updates the designated column with a java.sql.Date value. |
void |
updateDouble(int columnIndex,
double x)
Updates the designated column with a double value. |
void |
updateDouble(String columnName,
double x)
Updates the designated column with a double value. |
void |
updateFloat(int columnIndex,
float x)
Updates the designated column with a float value. |
void |
updateFloat(String columnName,
float x)
Updates the designated column with a float value. |
void |
updateInt(int columnIndex,
int x)
Updates the designated column with an int value. |
void |
updateInt(String columnName,
int x)
Updates the designated column with an int value. |
void |
updateLong(int columnIndex,
long x)
Updates the designated column with a long value. |
void |
updateLong(String columnName,
long x)
Updates the designated column with a long value. |
void |
updateNull(int columnIndex)
Gives a nullable column a null value. |
void |
updateNull(String columnName)
Updates the designated column with a null value. |
void |
updateObject(int columnIndex,
Object x)
Updates the designated column with an Object value. |
void |
updateObject(int columnIndex,
Object x,
int scale)
Updates the designated column with an Object value. |
void |
updateObject(String columnName,
Object x)
Updates the designated column with an Object value. |
void |
updateObject(String columnName,
Object x,
int scale)
Updates the designated column with an Object value. |
void |
updateRow()
Updates the underlying database with the new contents of the current row of this ResultSet object. |
void |
updateShort(int columnIndex,
short x)
Updates the designated column with a short value. |
void |
updateShort(String columnName,
short x)
Updates the designated column with a short value. |
void |
updateString(int columnIndex,
String x)
Updates the designated column with a String value. |
void |
updateString(String columnName,
String x)
Updates the designated column with a String value. |
void |
updateTime(int columnIndex,
Time x)
Updates the designated column with a java.sql.Time value. |
void |
updateTime(String columnName,
Time x)
Updates the designated column with a java.sql.Time value. |
void |
updateTimestamp(int columnIndex,
Timestamp x)
Updates the designated column with a java.sql.Timestamp
value. |
void |
updateTimestamp(String columnName,
Timestamp x)
Updates the designated column with a java.sql.Timestamp
value. |
boolean |
wasNull()
Reports whether the last column read had a value of SQL NULL . |
Field Detail |
public static final int FETCH_FORWARD
setFetchDirection
as a hint to the driver, which the driver may ignore.public static final int FETCH_REVERSE
setFetchDirection
as a hint to the driver, which the driver may ignore.public static final int FETCH_UNKNOWN
setFetchDirection
as a hint to the driver, which the driver may ignore.public static final int TYPE_FORWARD_ONLY
ResultSet
object
whose cursor may move only forward.public static final int TYPE_SCROLL_INSENSITIVE
ResultSet
object
that is scrollable but generally not sensitive to changes made by others.public static final int TYPE_SCROLL_SENSITIVE
ResultSet
object
that is scrollable and generally sensitive to changes made by others.public static final int CONCUR_READ_ONLY
ResultSet
object that may NOT be updated.public static final int CONCUR_UPDATABLE
ResultSet
object that may be updated.Method Detail |
public boolean next() throws SQLException
ResultSet
cursor is initially positioned
before the first row; the first call to the method
next
makes the first row the current row; the
second call makes the second row the current row, and so on.
If an input stream is open for the current row, a call
to the method next
will
implicitly close it. A ResultSet
object's
warning chain is cleared when a new row is read.
true
if the new current row is valid;
false
if there are no more rowsSQLException
- if a database access error occurspublic void close() throws SQLException
ResultSet
object's database and
JDBC resources immediately instead of waiting for
this to happen when it is automatically closed.
Note: A ResultSet
object
is automatically closed by the
Statement
object that generated it when
that Statement
object is closed,
re-executed, or is used to retrieve the next result from a
sequence of multiple results. A ResultSet
object
is also automatically closed when it is garbage collected.
SQLException
- if a database access error occurspublic boolean wasNull() throws SQLException
NULL
.
Note that you must first call one of the getXXX
methods
on a column to try to read its value and then call
the method wasNull
to see if the value read was
SQL NULL
.true
if the last column value read was SQL
NULL
and false
otherwiseSQLException
- if a database access error occurspublic String getString(int columnIndex) throws SQLException
ResultSet
object as
a String
in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is null
SQLException
- if a database access error occurspublic boolean getBoolean(int columnIndex) throws SQLException
ResultSet
object as
a boolean
in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is false
SQLException
- if a database access error occurspublic byte getByte(int columnIndex) throws SQLException
ResultSet
object as
a byte
in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is 0
SQLException
- if a database access error occurspublic short getShort(int columnIndex) throws SQLException
ResultSet
object as
a short
in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is 0
SQLException
- if a database access error occurspublic int getInt(int columnIndex) throws SQLException
ResultSet
object as
an int
in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is 0
SQLException
- if a database access error occurspublic long getLong(int columnIndex) throws SQLException
ResultSet
object as
a long
in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is 0
SQLException
- if a database access error occurspublic float getFloat(int columnIndex) throws SQLException
ResultSet
object as
a float
in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is 0
SQLException
- if a database access error occurspublic double getDouble(int columnIndex) throws SQLException
ResultSet
object as
a double
in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is 0
SQLException
- if a database access error occurspublic BigDecimal getBigDecimal(int columnIndex, int scale) throws SQLException
ResultSet
object as
a java.sql.BigDecimal
in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...scale
- the number of digits to the right of the decimal pointNULL
, the
value returned is null
SQLException
- if a database access error occurspublic byte[] getBytes(int columnIndex) throws SQLException
ResultSet
object as
a byte
array in the Java programming language.
The bytes represent the raw values returned by the driver.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is null
SQLException
- if a database access error occurspublic Date getDate(int columnIndex) throws SQLException
ResultSet
object as
a java.sql.Date
object in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is null
SQLException
- if a database access error occurspublic Time getTime(int columnIndex) throws SQLException
ResultSet
object as
a java.sql.Time
object in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is null
SQLException
- if a database access error occurspublic Timestamp getTimestamp(int columnIndex) throws SQLException
ResultSet
object as
a java.sql.Timestamp
object in the Java programming language.columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is null
SQLException
- if a database access error occurspublic InputStream getAsciiStream(int columnIndex) throws SQLException
ResultSet
object as
a stream of ASCII characters. The value can then be read in chunks from the
stream. This method is particularly
suitable for retrieving large Note: All the data in the returned stream must be
read prior to getting the value of any other column. The next
call to a getXXX
method implicitly closes the stream. Also, a
stream may return 0
when the method
InputStream.available
is called whether there is data available or not.
columnIndex
- the first column is 1, the second is 2, ...NULL
, the
value returned is null
SQLException
- if a database access error occurspublic InputStream getUnicodeStream(int columnIndex) throws SQLException
getCharacterStream
in place of
getUnicodeStream
ResultSet
object as
as a stream of Unicode characters.
The value can then be read in chunks from the
stream. This method is particularly
suitable for retrieving largeLONGVARCHAR
values. The JDBC driver will
do any necessary conversion from the database format into Unicode.
The byte format of the Unicode stream must be Java UTF-8,
as specified in the Java virtual machine specification.
Note: All the data in the returned stream must be
read prior to getting the value of any other column. The next
call to a getXXX
method implicitly closes the stream. Also, a
stream may return 0
when the method
InputStream.available
is called whether there is data available or not.
columnIndex
- the first column is 1, the second is 2, ...NULL
, the value returned is null
SQLException
- if a database access error occurspublic InputStream getBinaryStream(int columnIndex) throws SQLException
ResultSet
object as a binary stream of
uninterpreted bytes. The value can then be read in chunks from the
stream. This method is particularly
suitable for retrieving large LONGVARBINARY
values.
Note: All the data in the returned stream must be
read prior to getting the value of any other column. The next
call to a getXXX
method implicitly closes the stream. Also, a
stream may return 0
when the method
InputStream.available
is called whether there is data available or not.
columnIndex
- the first column is 1, the second is 2, ...NULL
, the value returned is null
SQLException
- if a database access error occurspublic String getString(String columnName) throws SQLException
ResultSet
object as
a String
in the Java programming language.columnName
- the SQL name of the columnNULL
, the
value returned is null
SQLException
- if a database access error occurspublic boolean getBoolean(String columnName) throws SQLException
ResultSet
object as
a boolean
in the Java programming language.columnName
- the SQL name of the columnNULL
, the
value returned is false
SQLException
- if a database access error occurspublic byte getByte(String columnName) throws SQLException
ResultSet
object as
a byte
in the Java programming language.columnName
- the SQL name of the columnNULL
, the
value returned is 0
SQLException
- if a database access error occurspublic short getShort(String columnName) throws SQLException
ResultSet
object as
a short
in the Java programming language.columnName
- the SQL name of the columnNULL
, the
value returned is 0
SQLException
- if a database access error occurspublic int getInt(String columnName) throws SQLException
ResultSet
object as
an int
in the Java programming language.columnName
- the SQL name of the columnNULL
, the
value returned is 0
SQLException
- if a database access error occurspublic long getLong(String columnName) throws SQLException
ResultSet
object as
a long
in the Java programming language.columnName
- the SQL name of the columnNULL
, the
value returned is 0
SQLException
- if a database access error occurspublic float getFloat(String columnName) throws SQLException
ResultSet
object as
a float
in the Java programming language.columnName
- the SQL name of the columnNULL
, the
value returned is 0
SQLException
- if a database access error occurspublic double getDouble(String columnName) throws SQLException
ResultSet
object as
a double
in the Java programming language.columnName
- the SQL name of the columnNULL
, the
value returned is 0
SQLException
- if a database access error occurspublic BigDecimal getBigDecimal(String columnName, int scale) throws SQLException
ResultSet
object as
a java.math.BigDecimal
in the Java programming language.columnName
- the SQL name of the columnscale
- the number of digits to the right of the decimal pointNULL
, the
value returned is null
SQLException
- if a database access error occurspublic byte[] getBytes(String columnName) throws SQLException
ResultSet
object as
a byte
array in the Java programming language.
The bytes represent the raw values returned by the driver.columnName
- the SQL name of the columnNULL
, the
value returned is null
SQLException
- if a database access error occurspublic Date getDate(String columnName) throws SQLException
ResultSet
object as
a java.sql.Date
object in the Java programming language.columnName
- the SQL name of the columnNULL
, the
value returned is null
SQLException
- if a database access error occurspublic Time getTime(String columnName) throws SQLException
ResultSet
object as
a java.sql.Time
object in the Java programming language.columnName
- the SQL name of the columnNULL
,
the value returned is null
SQLException
- if a database access error occurspublic Timestamp getTimestamp(String columnName) throws SQLException
ResultSet
object as
a java.sql.Timestamp
object.columnName
- the SQL name of the columnNULL
, the
value returned is null
SQLException
- if a database access error occurspublic InputStream getAsciiStream(String columnName) throws SQLException
ResultSet
object as a stream of
ASCII characters. The value can then be read in chunks from the
stream. This method is particularly
suitable for retrieving large LONGVARCHAR
values.
The JDBC driver will
do any necessary conversion from the database format into ASCII.
Note: All the data in the returned stream must be
read prior to getting the value of any other column. The next
call to a getXXX
method implicitly closes the stream. Also, a
stream may return 0
when the method available
is called whether there is data available or not.
columnName
- the SQL name of the columnNULL
,
the value returned is null
.SQLException
- if a database access error occurspublic InputStream getUnicodeStream(String columnName) throws SQLException
ResultSet
object as a stream of
Unicode characters. The value can then be read in chunks from the
stream. This method is particularly
suitable for retrieving large LONGVARCHAR
values.
The JDBC driver will
do any necessary conversion from the database format into Unicode.
The byte format of the Unicode stream must be Java UTF-8,
as defined in the Java virtual machine specification.
Note: All the data in the returned stream must be
read prior to getting the value of any other column. The next
call to a getXXX
method implicitly closes the stream. Also, a
stream may return 0
when the method available
is called whether there is data available or not.
columnName
- the SQL name of the columnNULL
,
the value returned is null
.SQLException
- if a database access error occurspublic InputStream getBinaryStream(String columnName) throws SQLException
ResultSet
object as a stream of uninterpreted
byte
s.
The value can then be read in chunks from the
stream. This method is particularly
suitable for retrieving large LONGVARBINARY
values.
Note: All the data in the returned stream must be
read prior to getting the value of any other column. The next
call to a getXXX
method implicitly closes the stream. Also, a
stream may return 0
when the method available
is called whether there is data available or not.
columnName
- the SQL name of the columnNULL
, the result is null
SQLException
- if a database access error occurspublic SQLWarning getWarnings() throws SQLException
ResultSet
object.
Subsequent warnings on this ResultSet
object
will be chained to the SQLWarning
object that
this method returns.
The warning chain is automatically cleared each time a new row is read.
Note: This warning chain only covers warnings caused
by ResultSet
methods. Any warning caused by
Statement
methods
(such as reading OUT parameters) will be chained on the
Statement
object.
SQLWarning
object reported or null
SQLException
- if a database access error occurspublic void clearWarnings() throws SQLException
ResultSet
object.
After this method is called, the method getWarnings
returns null
until a new warning is
reported for this ResultSet
object.SQLException
- if a database access error occurspublic String getCursorName() throws SQLException
ResultSet
object.
In SQL, a result table is retrieved through a cursor that is
named. The current row of a result set can be updated or deleted
using a positioned update/delete statement that references the
cursor name. To insure that the cursor has the proper isolation
level to support update, the cursor's select
statement should be
of the form 'select for update'. If the 'for update' clause is
omitted, the positioned updates may fail.
The JDBC API supports this SQL feature by providing the name of the
SQL cursor used by a ResultSet
object.
The current row of a ResultSet
object
is also the current row of this SQL cursor.
Note: If positioned update is not supported, a
SQLException
is thrown.
ResultSet
object's cursorSQLException
- if a database access error occurspublic ResultSetMetaData getMetaData() throws SQLException
ResultSet
object's columns.ResultSet
object's columnsSQLException
- if a database access error occurspublic Object getObject(int columnIndex) throws SQLException
Gets the value of the designated column in the current row
of this ResultSet
object as
an Object
in the Java programming language.
This method will return the value of the given column as a Java object. The type of the Java object will be the default Java object type corresponding to the column's SQL type, following the mapping for built-in types specified in the JDBC specification.
This method may also be used to read datatabase-specific
abstract data types.
In the JDBC 2.0 API, the behavior of method
getObject
is extended to materialize
data of SQL user-defined types. When a column contains
a structured or distinct value, the behavior of this method is as
if it were a call to: getObject(columnIndex,
this.getStatement().getConnection().getTypeMap())
.
columnIndex
- the first column is 1, the second is 2, ...java.lang.Object
holding the column valueSQLException
- if a database access error occurspublic Object getObject(String columnName) throws SQLException
Gets the value of the designated column in the current row
of this ResultSet
object as
an Object
in the Java programming language.
This method will return the value of the given column as a Java object. The type of the Java object will be the default Java object type corresponding to the column's SQL type, following the mapping for built-in types specified in the JDBC specification.
This method may also be used to read datatabase-specific
abstract data types.
In the JDBC 2.0 API, the behavior of the method
getObject
is extended to materialize
data of SQL user-defined types. When a column contains
a structured or distinct value, the behavior of this method is as
if it were a call to: getObject(columnIndex,
this.getStatement().getConnection().getTypeMap())
.
columnName
- the SQL name of the columnjava.lang.Object
holding the column valueSQLException
- if a database access error occurspublic int findColumn(String columnName) throws SQLException
ResultSet
column name to its
ResultSet
column index.columnName
- the name of the columnSQLException
- if a database access error occurspublic Reader getCharacterStream(int columnIndex) throws SQLException
ResultSet
object as a
java.io.Reader
object.columnIndex
- the first column is 1, the second is 2, ...java.io.Reader
object that contains the column
value; if the value is SQL NULL
, the value returned is
null
in the Java programming language.public Reader getCharacterStream(String columnName) throws SQLException
ResultSet
object as a
java.io.Reader
object.columnName
- the name of the columnjava.io.Reader
object that contains the column
value; if the value is SQL NULL
, the value returned is
null
in the Java programming language.public BigDecimal getBigDecimal(int columnIndex) throws SQLException
ResultSet
object as a
java.math.BigDecimal
with full precision.columnIndex
- the first column is 1, the second is 2, ...NULL
, the value returned is
null
in the Java programming language.SQLException
- if a database access error occurspublic BigDecimal getBigDecimal(String columnName) throws SQLException
ResultSet
object as a
java.math.BigDecimal
with full precision.columnName
- the column nameNULL
, the value returned is
null
in the Java programming language.SQLException
- if a database access error occurspublic boolean isBeforeFirst() throws SQLException
ResultSet
object.true
if the cursor is before the first row;
false
if the cursor is at any other position or the
result set contains no rowsSQLException
- if a database access error occurspublic boolean isAfterLast() throws SQLException
ResultSet
object.true
if the cursor is after the last row;
false
if the cursor is at any other position or the
result set contains no rowsSQLException
- if a database access error occurspublic boolean isFirst() throws SQLException
ResultSet
object.true
if the cursor is on the first row;
false
otherwiseSQLException
- if a database access error occurspublic boolean isLast() throws SQLException
ResultSet
object.
Note: Calling the method isLast
may be expensive
because the JDBC driver
might need to fetch ahead one row in order to determine
whether the current row is the last row in the result set.true
if the cursor is on the last row;
false
otherwiseSQLException
- if a database access error occurspublic void beforeFirst() throws SQLException
ResultSet
object, just before the
first row. This method has no effect if the result set contains no rows.SQLException
- if a database access error
occurs or the result set type is TYPE_FORWARD_ONLY
public void afterLast() throws SQLException
ResultSet
object, just after the
last row. This method has no effect if the result set contains no rows.SQLException
- if a database access error
occurs or the result set type is TYPE_FORWARD_ONLY
public boolean first() throws SQLException
ResultSet
object.true
if the cursor is on a valid row;
false
if there are no rows in the result setSQLException
- if a database access error
occurs or the result set type is TYPE_FORWARD_ONLY
public boolean last() throws SQLException
ResultSet
object.true
if the cursor is on a valid row;
false
if there are no rows in the result setSQLException
- if a database access error
occurs or the result set type is TYPE_FORWARD_ONLY
public int getRow() throws SQLException
0
if there is no current rowSQLException
- if a database access error occurspublic boolean absolute(int row) throws SQLException
ResultSet
object.
If the row number is positive, the cursor moves to the given row number with respect to the beginning of the result set. The first row is row 1, the second is row 2, and so on.
If the given row number is negative, the cursor moves to
an absolute row position with respect to
the end of the result set. For example, calling the method
absolute(-1)
positions the
cursor on the last row; calling the method absolute(-2)
moves the cursor to the next-to-last row, and so on.
An attempt to position the cursor beyond the first/last row in the result set leaves the cursor before the first row or after the last row.
Note: Calling absolute(1)
is the same
as calling first()
. Calling absolute(-1)
is the same as calling last()
.
true
if the cursor is on the result set;
false
otherwiseSQLException
- if a database access error
occurs, the row is 0
, or the result set type is
TYPE_FORWARD_ONLY
public boolean relative(int rows) throws SQLException
relative(0)
is valid, but does
not change the cursor position.
Note: Calling the method relative(1)
is different from calling the method next()
because is makes sense to call next()
when there
is no current row,
for example, when the cursor is positioned before the first row
or after the last row of the result set.
true
if the cursor is on a row;
false
otherwiseSQLException
- if a database access error occurs,
there is no current row, or the result set type is
TYPE_FORWARD_ONLY
public boolean previous() throws SQLException
ResultSet
object.
Note: Calling the method previous()
is not the same as
calling the method relative(-1)
because it
makes sense to callprevious() when there is no current row.
true
if the cursor is on a valid row;
false
if it is off the result setSQLException
- if a database access error
occurs or the result set type is TYPE_FORWARD_ONLY
public void setFetchDirection(int direction) throws SQLException
ResultSet
object will be processed.
The initial value is determined by the
Statement
object
that produced this ResultSet
object.
The fetch direction may be changed at any time.SQLException
- if a database access error occurs or
the result set type is TYPE_FORWARD_ONLY
and the fetch
direction is not FETCH_FORWARD
Statement.setFetchDirection(int)
public int getFetchDirection() throws SQLException
ResultSet
object.ResultSet
objectSQLException
- if a database access error occurspublic void setFetchSize(int rows) throws SQLException
ResultSet
object.
If the fetch size specified is zero, the JDBC driver
ignores the value and is free to make its own best guess as to what
the fetch size should be. The default value is set by the
Statement
object
that created the result set. The fetch size may be changed at any time.rows
- the number of rows to fetchSQLException
- if a database access error occurs or the
condition 0 <= rows <= this.getMaxRows()
is not satisfiedpublic int getFetchSize() throws SQLException
ResultSet
object.ResultSet
objectSQLException
- if a database access error occurspublic int getType() throws SQLException
ResultSet
object.
The type is determined by the Statement
object
that created the result set.TYPE_FORWARD_ONLY
,
TYPE_SCROLL_INSENSITIVE
,
or TYPE_SCROLL_SENSITIVE
SQLException
- if a database access error occurspublic int getConcurrency() throws SQLException
ResultSet
object.
The concurrency used is determined by the
Statement
object that created the result set.CONCUR_READ_ONLY
or CONCUR_UPDATABLE
SQLException
- if a database access error occurspublic boolean rowUpdated() throws SQLException
true
if the row has been visibly updated
by the owner or another, and updates are detectedSQLException
- if a database access error occursDatabaseMetaData.updatesAreDetected(int)
,
What Is in the JDBC
2.0 APIpublic boolean rowInserted() throws SQLException
ResultSet
object can detect visible inserts.true
if a row has had an insertion
and insertions are detected; false
otherwiseSQLException
- if a database access error occursDatabaseMetaData.insertsAreDetected(int)
,
What Is in the JDBC
2.0 APIpublic boolean rowDeleted() throws SQLException
ResultSet
object can detect deletions.true
if a row was deleted and deletions are detected;
false
otherwiseSQLException
- if a database access error occursDatabaseMetaData.deletesAreDetected(int)
,
What Is in the JDBC
2.0 APIpublic void updateNull(int columnIndex) throws SQLException
updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...SQLException
- if a database access error occurspublic void updateBoolean(int columnIndex, boolean x) throws SQLException
boolean
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateByte(int columnIndex, byte x) throws SQLException
byte
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateShort(int columnIndex, short x) throws SQLException
short
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateInt(int columnIndex, int x) throws SQLException
int
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateLong(int columnIndex, long x) throws SQLException
long
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateFloat(int columnIndex, float x) throws SQLException
float
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateDouble(int columnIndex, double x) throws SQLException
double
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateBigDecimal(int columnIndex, BigDecimal x) throws SQLException
java.math.BigDecimal
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateString(int columnIndex, String x) throws SQLException
String
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateBytes(int columnIndex, byte[] x) throws SQLException
byte
array value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateDate(int columnIndex, Date x) throws SQLException
java.sql.Date
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateTime(int columnIndex, Time x) throws SQLException
java.sql.Time
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateTimestamp(int columnIndex, Timestamp x) throws SQLException
java.sql.Timestamp
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateAsciiStream(int columnIndex, InputStream x, int length) throws SQLException
updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valuelength
- the length of the streamSQLException
- if a database access error occurspublic void updateBinaryStream(int columnIndex, InputStream x, int length) throws SQLException
updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valuelength
- the length of the streamSQLException
- if a database access error occurspublic void updateCharacterStream(int columnIndex, Reader x, int length) throws SQLException
updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valuelength
- the length of the streamSQLException
- if a database access error occurspublic void updateObject(int columnIndex, Object x, int scale) throws SQLException
Object
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valuescale
- for java.sql.Types.DECIMA
or java.sql.Types.NUMERIC
types,
this is the number of digits after the decimal point. For all other
types this value will be ignored.SQLException
- if a database access error occurspublic void updateObject(int columnIndex, Object x) throws SQLException
Object
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnIndex
- the first column is 1, the second is 2, ...x
- the new column valueSQLException
- if a database access error occurspublic void updateNull(String columnName) throws SQLException
null
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnSQLException
- if a database access error occurspublic void updateBoolean(String columnName, boolean x) throws SQLException
boolean
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateByte(String columnName, byte x) throws SQLException
byte
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateShort(String columnName, short x) throws SQLException
short
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateInt(String columnName, int x) throws SQLException
int
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateLong(String columnName, long x) throws SQLException
long
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateFloat(String columnName, float x) throws SQLException
float
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateDouble(String columnName, double x) throws SQLException
double
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateBigDecimal(String columnName, BigDecimal x) throws SQLException
java.sql.BigDecimal
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateString(String columnName, String x) throws SQLException
String
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateBytes(String columnName, byte[] x) throws SQLException
boolean
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.
JDBC 2.0
Updates a column with a byte array value.
The updateXXX
methods are used to update column values in the
current row, or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateDate(String columnName, Date x) throws SQLException
java.sql.Date
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateTime(String columnName, Time x) throws SQLException
java.sql.Time
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateTimestamp(String columnName, Timestamp x) throws SQLException
java.sql.Timestamp
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void updateAsciiStream(String columnName, InputStream x, int length) throws SQLException
updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valuelength
- the length of the streamSQLException
- if a database access error occurspublic void updateBinaryStream(String columnName, InputStream x, int length) throws SQLException
updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valuelength
- the length of the streamSQLException
- if a database access error occurspublic void updateCharacterStream(String columnName, Reader reader, int length) throws SQLException
updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valuelength
- the length of the streamSQLException
- if a database access error occurspublic void updateObject(String columnName, Object x, int scale) throws SQLException
Object
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valuescale
- for java.sql.Types.DECIMA
or java.sql.Types.NUMERIC
types,
this is the number of digits after the decimal point. For all other
types this value will be ignored.SQLException
- if a database access error occurspublic void updateObject(String columnName, Object x) throws SQLException
Object
value.
The updateXXX
methods are used to update column values in the
current row or the insert row. The updateXXX
methods do not
update the underlying database; instead the updateRow
or
insertRow
methods are called to update the database.columnName
- the name of the columnx
- the new column valueSQLException
- if a database access error occurspublic void insertRow() throws SQLException
ResultSet
objaect and into the database.
The cursor must be on the insert row when this method is called.SQLException
- if a database access error occurs,
if this method is called when the cursor is not on the insert row,
or if not all of non-nullable columns in
the insert row have been given a valuepublic void updateRow() throws SQLException
ResultSet
object.
This method cannot be called when the cursor is on the insert row.SQLException
- if a database access error occurs or
if this method is called when the cursor is on the insert rowpublic void deleteRow() throws SQLException
ResultSet
object
and from the underlying database. This method cannot be called when
the cursor is on the insert row.SQLException
- if a database access error occurs
or if this method is called when the cursor is on the insert rowpublic void refreshRow() throws SQLException
The refreshRow
method provides a way for an
application to
explicitly tell the JDBC driver to refetch a row(s) from the
database. An application may want to call refreshRow
when
caching or prefetching is being done by the JDBC driver to
fetch the latest value of a row from the database. The JDBC driver
may actually refresh multiple rows at once if the fetch size is
greater than one.
All values are refetched subject to the transaction isolation
level and cursor sensitivity. If refreshRow
is called after
calling an updateXXX
method, but before calling
the method updateRow
, then the
updates made to the row are lost. Calling the method
refreshRow
frequently will likely slow performance.
SQLException
- if a database access error
occurs or if this method is called when the cursor is on the insert rowpublic void cancelRowUpdates() throws SQLException
ResultSet
object.
This method may be called after calling an
updateXXX
method(s) and before calling
the method updateRow
to roll back
the updates made to a row. If no updates have been made or
updateRow
has already been called, this method has no
effect.SQLException
- if a database access error
occurs or if this method is called when the cursor is on the insert rowpublic void moveToInsertRow() throws SQLException
updateXXX
methods prior to
inserting the row into the result set.
Only the updateXXX
, getXXX
,
and insertRow
methods may be
called when the cursor is on the insert row. All of the columns in
a result set must be given a value each time this method is
called before calling insertRow
.
An updateXXX
method must be called before a
getXXX
method can be called on a column value.SQLException
- if a database access error occurs
or the result set is not updatablepublic void moveToCurrentRow() throws SQLException
SQLException
- if a database access error occurs
or the result set is not updatablepublic Statement getStatement() throws SQLException
Statement
object that produced this
ResultSet
object.
If the result set was generated some other way, such as by a
DatabaseMetaData
method, this method returns
null
.Statment
object that produced
this ResultSet
object or null
if the result set was produced some other waySQLException
- if a database access error occurspublic Object getObject(int i, Map map) throws SQLException
ResultSet
object as an Object
in the Java programming language.
This method uses the given Map
object
for the custom mapping of the
SQL structured or distinct type that is being retrieved.i
- the first column is 1, the second is 2, ...map
- a java.util.Map
object that contains the mapping
from SQL type names to classes in the Java programming languageObject
in the Java programming language
representing the SQL valuepublic Ref getRef(int i) throws SQLException
ResultSet
object as a Ref
object
in the Java programming language.i
- the first column is 1, the second is 2, ...Ref
object representing an SQL REF
valuepublic Blob getBlob(int i) throws SQLException
ResultSet
object as a Blob
object
in the Java programming language.i
- the first column is 1, the second is 2, ...Blob
object representing the SQL BLOB
value in
the specified columnpublic Clob getClob(int i) throws SQLException
ResultSet
object as a Clob
object
in the Java programming language.i
- the first column is 1, the second is 2, ...Clob
object representing the SQL CLOB
value in
the specified columnpublic Array getArray(int i) throws SQLException
ResultSet
object as an Array
object
in the Java programming language.i
- the first column is 1, the second is 2, ...Array
object representing the SQL ARRAY
value in
the specified columnpublic Object getObject(String colName, Map map) throws SQLException
ResultSet
object as an Object
in the Java programming language.
This method uses the specified Map
object for
custom mapping if appropriate.colName
- the name of the column from which to retrieve the valuemap
- a java.util.Map
object that contains the mapping
from SQL type names to classes in the Java programming languageObject
representing the SQL value in the specified columnpublic Ref getRef(String colName) throws SQLException
ResultSet
object as a Ref
object
in the Java programming language.colName
- the column nameRef
object representing the SQL REF
value in
the specified columnpublic Blob getBlob(String colName) throws SQLException
ResultSet
object as a Blob
object
in the Java programming language.colName
- the name of the column from which to retrieve the valueBlob
object representing the SQL BLOB
value in
the specified columnpublic Clob getClob(String colName) throws SQLException
ResultSet
object as a Clob
object
in the Java programming language.colName
- the name of the column from which to retrieve the valueClob
object representing the SQL CLOB
value in the specified columnpublic Array getArray(String colName) throws SQLException
ResultSet
object as an Array
object
in the Java programming language.colName
- the name of the column from which to retrieve the valueArray
object representing the SQL ARRAY
value in
the specified columnpublic Date getDate(int columnIndex, Calendar cal) throws SQLException
ResultSet
object as a java.sql.Date
object
in the Java programming language.
This method uses the given calendar to construct an appropriate millisecond
value for the date if the underlying database does not store
timezone information.columnIndex
- the first column is 1, the second is 2, ...cal
- the java.util.Calendar
object
to use in constructing the datejava.sql.Date
object;
if the value is SQL NULL
,
the value returned is null
in the Java programming languageSQLException
- if a database access error occurspublic Date getDate(String columnName, Calendar cal) throws SQLException
ResultSet
object as a java.sql.Date
object
in the Java programming language.
This method uses the given calendar to construct an appropriate millisecond
value for the date if the underlying database does not store
timezone information.columnName
- the SQL name of the column from which to retrieve the valuecal
- the java.util.Calendar
object
to use in constructing the datejava.sql.Date
object;
if the value is SQL NULL
,
the value returned is null
in the Java programming languageSQLException
- if a database access error occurspublic Time getTime(int columnIndex, Calendar cal) throws SQLException
ResultSet
object as a java.sql.Time
object
in the Java programming language.
This method uses the given calendar to construct an appropriate millisecond
value for the time if the underlying database does not store
timezone information.columnIndex
- the first column is 1, the second is 2, ...cal
- the java.util.Calendar
object
to use in constructing the timejava.sql.Time
object;
if the value is SQL NULL
,
the value returned is null
in the Java programming languageSQLException
- if a database access error occurspublic Time getTime(String columnName, Calendar cal) throws SQLException
ResultSet
object as a java.sql.Time
object
in the Java programming language.
This method uses the given calendar to construct an appropriate millisecond
value for the time if the underlying database does not store
timezone information.columnName
- the SQL name of the columncal
- the java.util.Calendar
object
to use in constructing the timecal
- the calendar to use in constructing the timejava.sql.Time
object;
if the value is SQL NULL
,
the value returned is null
in the Java programming languageSQLException
- if a database access error occurspublic Timestamp getTimestamp(int columnIndex, Calendar cal) throws SQLException
ResultSet
object as a java.sql.Timestamp
object
in the Java programming language.
This method uses the given calendar to construct an appropriate millisecond
value for the timestamp if the underlying database does not store
timezone information.columnIndex
- the first column is 1, the second is 2, ...cal
- the java.util.Calendar
object
to use in constructing the timestampjava.sql.Timestamp
object;
if the value is SQL NULL
,
the value returned is null
in the Java programming languageSQLException
- if a database access error occurspublic Timestamp getTimestamp(String columnName, Calendar cal) throws SQLException
ResultSet
object as a java.sql.Timestamp
object
in the Java programming language.
This method uses the given calendar to construct an appropriate millisecond
value for the timestamp if the underlying database does not store
timezone information.columnName
- the SQL name of the columncal
- the java.util.Calendar
object
to use in constructing the datejava.sql.Timestamp
object;
if the value is SQL NULL
,
the value returned is null
in the Java programming languageSQLException
- if a database access error occurs
|
JavaTM 2 Platform Std. Ed. v1.3.1 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
Java, Java 2D, and JDBC are trademarks or registered trademarks of Oracle and/or its affiliates, in the US and other countries.
Copyright © 1995, 2010 Oracle and/or its affiliates. All rights reserved.