SQLWarning

AI-generated Key Takeaways

• SQLWarning is an exception providing information on database access warnings, chained to the object whose method caused the warning.

• Warnings can be retrieved from Connection, Statement, and ResultSet objects but attempting to retrieve them after closing the associated object will throw an exception.

• SQLWarning objects can be chained together to provide a sequence of warnings.

• Multiple constructors allow creating SQLWarning instances with varying levels of detail, including reason, SQLState, vendor code, and cause.

• getNextWarning() and setNextWarning() methods enable traversal and manipulation of the chained warnings.

public class SQLWarning extends SQLException

Known Direct Subclasses DataTruncation DataTruncation An exception thrown as a DataTruncation exception (on writes) or reported as a DataTruncation warning (on reads) when a data values is unexpectedly truncated for reasons other than its having execeeded MaxFieldSize.

An exception that provides information on database access warnings. Warnings are silently chained to the object whose method caused it to be reported.

Warnings may be retrieved from Connection, Statement, and ResultSet objects. Trying to retrieve a warning on a connection after it has been closed will cause an exception to be thrown. Similarly, trying to retrieve a warning on a statement after it has been closed or on a result set after it has been closed will cause an exception to be thrown. Note that closing a statement also closes a result set that it might have produced.

See Also

• Connection.getWarnings()
• Statement.getWarnings()
• ResultSet.getWarnings()

Public Constructor Summary

	SQLWarning(String reason, String SQLState, int vendorCode) Constructs a SQLWarning object with a given reason, SQLState and vendorCode.
	SQLWarning(String reason, String SQLState) Constructs a SQLWarning object with a given reason and SQLState.
	SQLWarning(String reason) Constructs a SQLWarning object with a given reason.
	SQLWarning() Constructs a SQLWarning object.
	SQLWarning(Throwable cause) Constructs a SQLWarning object with a given cause.
	SQLWarning(String reason, Throwable cause) Constructs a SQLWarning object with a given reason and cause.
	SQLWarning(String reason, String SQLState, Throwable cause) Constructs a SQLWarning object with a given reason, SQLState and cause.
	SQLWarning(String reason, String SQLState, int vendorCode, Throwable cause) Constructs aSQLWarning object with a given reason, SQLState, vendorCode and cause.

Public Method Summary

SQLWarning	getNextWarning() Retrieves the warning chained to this SQLWarning object by setNextWarning.
void	setNextWarning(SQLWarning w) Adds a SQLWarning object to the end of the chain.

Inherited Method Summary

From class java.sql.SQLException

int	getErrorCode() Retrieves the vendor-specific exception code for this SQLException object.
SQLException	getNextException() Retrieves the exception chained to this SQLException object by setNextException(SQLException ex).
String	getSQLState() Retrieves the SQLState for this SQLException object.
Iterator<Throwable>	iterator() Returns an iterator over the chained SQLExceptions.
void	setNextException(SQLException ex) Adds an SQLException object to the end of the chain.

From class java.lang.Throwable

synchronized final void	addSuppressed(Throwable exception) Appends the specified exception to the exceptions that were suppressed in order to deliver this exception.
synchronized Throwable	fillInStackTrace() Fills in the execution stack trace.
synchronized Throwable	getCause() Returns the cause of this throwable or null if the cause is nonexistent or unknown.
String	getLocalizedMessage() Creates a localized description of this throwable.
String	getMessage() Returns the detail message string of this throwable.
StackTraceElement[]	getStackTrace() Provides programmatic access to the stack trace information printed by printStackTrace().
synchronized final Throwable[]	getSuppressed() Returns an array containing all of the exceptions that were suppressed, typically by the try-with-resources statement, in order to deliver this exception.
synchronized Throwable	initCause(Throwable cause) Initializes the cause of this throwable to the specified value.
void	printStackTrace() Prints this throwable and its backtrace to the standard error stream.
void	printStackTrace(PrintWriter s) Prints this throwable and its backtrace to the specified print writer.
void	printStackTrace(PrintStream s) Prints this throwable and its backtrace to the specified print stream.
void	setStackTrace(StackTraceElement[] stackTrace) Sets the stack trace elements that will be returned by getStackTrace() and printed by printStackTrace() and related methods.
String	toString() Returns a short description of this throwable.

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

From interface java.lang.Iterable

void	forEach(Consumer<? super T> action) Performs the given action for each element of the Iterable until all elements have been processed or the action throws an exception.
abstract Iterator<Throwable>	iterator() Returns an iterator over elements of type T.
Spliterator<Throwable>	spliterator() Creates a Spliterator over the elements described by this Iterable.

Public Constructors

public SQLWarning (String reason, String SQLState, int vendorCode)

Constructs a SQLWarning object with a given reason, SQLState and vendorCode. The cause is not initialized, and may subsequently be initialized by a call to the Throwable.initCause(java.lang.Throwable) method.

Parameters

reason	a description of the warning
SQLState	an XOPEN or SQL:2003 code identifying the warning
vendorCode	a database vendor-specific warning code

public SQLWarning (String reason, String SQLState)

Constructs a SQLWarning object with a given reason and SQLState. The cause is not initialized, and may subsequently be initialized by a call to the Throwable.initCause(java.lang.Throwable) method. The vendor code is initialized to 0.

Parameters

reason	a description of the warning
SQLState	an XOPEN or SQL:2003 code identifying the warning

public SQLWarning (String reason)

Constructs a SQLWarning object with a given reason. The SQLState is initialized to null and the vender code is initialized to 0. The cause is not initialized, and may subsequently be initialized by a call to the Throwable.initCause(java.lang.Throwable) method.

Parameters

reason	a description of the warning

public SQLWarning ()

Constructs a SQLWarning object. The reason, SQLState are initialized to null and the vendor code is initialized to 0. The cause is not initialized, and may subsequently be initialized by a call to the Throwable.initCause(java.lang.Throwable) method.

public SQLWarning (Throwable cause)

Constructs a SQLWarning object with a given cause. The SQLState is initialized to null and the vendor code is initialized to 0. The reason is initialized to null if cause==null or to cause.toString() if cause!=null.

Parameters

cause	the underlying reason for this SQLWarning (which is saved for later retrieval by the getCause() method); may be null indicating the cause is non-existent or unknown.

public SQLWarning (String reason, Throwable cause)

Constructs a SQLWarning object with a given reason and cause. The SQLState is initialized to null and the vendor code is initialized to 0.

Parameters

reason	a description of the warning
cause	the underlying reason for this SQLWarning (which is saved for later retrieval by the getCause() method); may be null indicating the cause is non-existent or unknown.

public SQLWarning (String reason, String SQLState, Throwable cause)

Constructs a SQLWarning object with a given reason, SQLState and cause. The vendor code is initialized to 0.

Parameters

reason	a description of the warning
SQLState	an XOPEN or SQL:2003 code identifying the warning
cause	the underlying reason for this SQLWarning (which is saved for later retrieval by the getCause() method); may be null indicating the cause is non-existent or unknown.

public SQLWarning (String reason, String SQLState, int vendorCode, Throwable cause)

Constructs aSQLWarning object with a given reason, SQLState, vendorCode and cause.

Parameters

reason	a description of the warning
SQLState	an XOPEN or SQL:2003 code identifying the warning
vendorCode	a database vendor-specific warning code
cause	the underlying reason for this SQLWarning (which is saved for later retrieval by the getCause() method); may be null indicating the cause is non-existent or unknown.

Public Methods

public SQLWarning getNextWarning ()

Retrieves the warning chained to this SQLWarning object by setNextWarning.

Returns

• the next SQLException in the chain; null if none

See Also

• setNextWarning(SQLWarning)

public void setNextWarning (SQLWarning w)

Adds a SQLWarning object to the end of the chain.

Parameters

w	the new end of the SQLException chain

See Also

• getNextWarning()