/**
* Returns the current transaction isolation level.
*
* @return the isolation level.
* @throws SQLException if the connection is closed
*/
public int getTransactionIsolation() throws SQLException {
try {
debugCodeCall("getTransactionIsolation");
checkClosed();
getLockMode = prepareCommand("CALL LOCK_MODE()", getLockMode);
ResultInterface result = getLockMode.executeQuery(0, false);
result.next();
int lockMode = result.currentRow()[0].getInt();
result.close();
int transactionIsolationLevel;
switch (lockMode) {
case Constants.LOCK_MODE_OFF:
transactionIsolationLevel = Connection.TRANSACTION_READ_UNCOMMITTED;
break;
case Constants.LOCK_MODE_READ_COMMITTED:
transactionIsolationLevel = Connection.TRANSACTION_READ_COMMITTED;
break;
case Constants.LOCK_MODE_TABLE:
case Constants.LOCK_MODE_TABLE_GC:
transactionIsolationLevel = Connection.TRANSACTION_SERIALIZABLE;
break;
default:
throw DbException.throwInternalError("lockMode:" + lockMode);
}
return transactionIsolationLevel;
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Changes the current transaction isolation level. Calling this method will commit an open
* transaction, even if the new level is the same as the old one, except if the level is not
* supported. Internally, this method calls SET LOCK_MODE. The following isolation levels are
* supported:
*
* <ul>
* <li>Connection.TRANSACTION_READ_UNCOMMITTED = SET LOCK_MODE 0: no locking (should only be
* used for testing).
* <li>Connection.TRANSACTION_SERIALIZABLE = SET LOCK_MODE 1: table level locking.
* <li>Connection.TRANSACTION_READ_COMMITTED = SET LOCK_MODE 3: table level locking, but read
* locks are released immediately (default).
* </ul>
*
* This setting is not persistent. Please note that using TRANSACTION_READ_UNCOMMITTED while at
* the same time using multiple connections may result in inconsistent transactions.
*
* @param level the new transaction isolation level: Connection.TRANSACTION_READ_UNCOMMITTED,
* Connection.TRANSACTION_READ_COMMITTED, or Connection.TRANSACTION_SERIALIZABLE
* @throws SQLException if the connection is closed or the isolation level is not supported
*/
public void setTransactionIsolation(int level) throws SQLException {
try {
debugCodeCall("setTransactionIsolation", level);
checkClosed();
int lockMode;
switch (level) {
case Connection.TRANSACTION_READ_UNCOMMITTED:
lockMode = Constants.LOCK_MODE_OFF;
break;
case Connection.TRANSACTION_READ_COMMITTED:
lockMode = Constants.LOCK_MODE_READ_COMMITTED;
break;
case Connection.TRANSACTION_REPEATABLE_READ:
case Connection.TRANSACTION_SERIALIZABLE:
lockMode = Constants.LOCK_MODE_TABLE;
break;
default:
throw DbException.getInvalidValueException("" + level, "level");
}
commit();
setLockMode = prepareCommand("SET LOCK_MODE ?", setLockMode);
setLockMode.getParameters().get(0).setValue(ValueInt.get(lockMode), false);
setLockMode.executeUpdate();
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Creates a prepared statement with the specified result set type, concurrency, and holdability.
*
* @return the prepared statement
* @throws SQLException if the connection is closed or the result set type, concurrency, or
* holdability are not supported
*/
public PreparedStatement prepareStatement(
String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
try {
int id = getNextId(TraceObject.PREPARED_STATEMENT);
if (isDebugEnabled()) {
debugCodeAssign(
"PreparedStatement",
TraceObject.PREPARED_STATEMENT,
id,
"prepareStatement("
+ quote(sql)
+ ", "
+ resultSetType
+ ", "
+ resultSetConcurrency
+ ", "
+ resultSetHoldability
+ ")");
}
checkTypeConcurrency(resultSetType, resultSetConcurrency);
checkHoldability(resultSetHoldability);
checkClosed();
sql = translateSQL(sql);
return new JdbcPreparedStatement(this, sql, id, resultSetType, resultSetConcurrency, false);
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Creates a statement with the specified result set type, concurrency, and holdability.
*
* @return the statement
* @throws SQLException if the connection is closed or the result set type, concurrency, or
* holdability are not supported
*/
public Statement createStatement(
int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
try {
int id = getNextId(TraceObject.STATEMENT);
if (isDebugEnabled()) {
debugCodeAssign(
"Statement",
TraceObject.STATEMENT,
id,
"createStatement("
+ resultSetType
+ ", "
+ resultSetConcurrency
+ ", "
+ resultSetHoldability
+ ")");
}
checkTypeConcurrency(resultSetType, resultSetConcurrency);
checkHoldability(resultSetHoldability);
checkClosed();
return new JdbcStatement(this, id, resultSetType, resultSetConcurrency, false);
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Set the default catalog name. This call is ignored.
*
* @throws SQLException if the connection is closed
*/
public void setCatalog(String catalog) throws SQLException {
try {
debugCodeCall("setCatalog", catalog);
checkClosed();
} catch (Exception e) {
throw logAndConvert(e);
}
}
/** Clears all warnings. */
public void clearWarnings() throws SQLException {
try {
debugCodeCall("clearWarnings");
checkClosed();
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Translates a SQL statement into the database grammar.
*
* @return the translated statement
* @throws SQLException if the connection is closed
*/
public String nativeSQL(String sql) throws SQLException {
try {
debugCodeCall("nativeSQL", sql);
checkClosed();
return translateSQL(sql);
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Gets the current setting for auto commit.
*
* @return true for on, false for off
* @throws SQLException if the connection is closed
*/
public synchronized boolean getAutoCommit() throws SQLException {
try {
checkClosed();
debugCodeCall("getAutoCommit");
return getInternalAutoCommit();
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Returns the current result set holdability.
*
* @return the holdability
* @throws SQLException if the connection is closed
*/
public int getHoldability() throws SQLException {
try {
debugCodeCall("getHoldability");
checkClosed();
return holdability;
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Gets the type map.
*
* @return null
* @throws SQLException if the connection is closed
*/
public Map<String, Class<?>> getTypeMap() throws SQLException {
try {
debugCodeCall("getTypeMap");
checkClosed();
return null;
} catch (Exception e) {
throw logAndConvert(e);
}
}
// ## Java 1.4 begin ##
public void releaseSavepoint(Savepoint savepoint) throws SQLException {
try {
debugCode("releaseSavepoint(savepoint);");
checkClosed();
convertSavepoint(savepoint).release();
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Gets the first warning reported by calls on this object.
*
* @return null
*/
public SQLWarning getWarnings() throws SQLException {
try {
debugCodeCall("getWarnings");
checkClosed();
return null;
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Changes the current result set holdability.
*
* @param holdability ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT;
* @throws SQLException if the connection is closed or the holdability is not supported
*/
public void setHoldability(int holdability) throws SQLException {
try {
debugCodeCall("setHoldability", holdability);
checkClosed();
checkHoldability(holdability);
this.holdability = holdability;
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* According to the JDBC specs, this setting is only a hint to the database to enable
* optimizations - it does not cause writes to be prohibited.
*
* @throws SQLException if the connection is closed
*/
public void setReadOnly(boolean readOnly) throws SQLException {
try {
if (isDebugEnabled()) {
debugCode("setReadOnly(" + readOnly + ");");
}
checkClosed();
} catch (Exception e) {
throw logAndConvert(e);
}
}
/** INTERNAL */
public void setQueryTimeout(int seconds) throws SQLException {
try {
debugCodeCall("setQueryTimeout", seconds);
checkClosed();
setQueryTimeout = prepareCommand("SET QUERY_TIMEOUT ?", setQueryTimeout);
setQueryTimeout.getParameters().get(0).setValue(ValueInt.get(seconds * 1000), false);
setQueryTimeout.executeUpdate();
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Gets the database meta data for this database.
*
* @return the database meta data
* @throws SQLException if the connection is closed
*/
public DatabaseMetaData getMetaData() throws SQLException {
try {
int id = getNextId(TraceObject.DATABASE_META_DATA);
if (isDebugEnabled()) {
debugCodeAssign("DatabaseMetaData", TraceObject.DATABASE_META_DATA, id, "getMetaData()");
}
checkClosed();
return new JdbcDatabaseMetaData(this, trace, id);
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Returns true if the database is read-only.
*
* @return if the database is read-only
* @throws SQLException if the connection is closed
*/
public boolean isReadOnly() throws SQLException {
try {
debugCodeCall("isReadOnly");
checkClosed();
getReadOnly = prepareCommand("CALL READONLY()", getReadOnly);
ResultInterface result = getReadOnly.executeQuery(0, false);
result.next();
boolean readOnly = result.currentRow()[0].getBoolean().booleanValue();
return readOnly;
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* INTERNAL. Check if the statement is closed.
*
* @param write if the next operation is possibly writing
* @return true if a reconnect was required
* @throws SQLException if it is closed
*/
protected boolean checkClosed(boolean write) throws SQLException {
if (conn == null) {
throw Message.getSQLException(ErrorCode.OBJECT_CLOSED);
}
conn.checkClosed(write);
SessionInterface s = conn.getSession();
if (s != session) {
session = s;
setTrace(session.getTrace());
return true;
}
return false;
}
/**
* Gets the current catalog name.
*
* @return the catalog name
* @throws SQLException if the connection is closed
*/
public String getCatalog() throws SQLException {
try {
debugCodeCall("getCatalog");
checkClosed();
if (catalog == null) {
CommandInterface cat = prepareCommand("CALL DATABASE()", Integer.MAX_VALUE);
ResultInterface result = cat.executeQuery(0, false);
result.next();
catalog = result.currentRow()[0].getString();
cat.close();
}
return catalog;
} catch (Exception e) {
throw logAndConvert(e);
}
}
// ## Java 1.4 begin ##
public Savepoint setSavepoint(String name) throws SQLException {
try {
int id = getNextId(TraceObject.SAVEPOINT);
if (isDebugEnabled()) {
debugCodeAssign(
"Savepoint", TraceObject.SAVEPOINT, id, "setSavepoint(" + quote(name) + ")");
}
checkClosed();
CommandInterface set =
prepareCommand("SAVEPOINT " + JdbcSavepoint.getName(name, 0), Integer.MAX_VALUE);
set.executeUpdate();
JdbcSavepoint savepoint = new JdbcSavepoint(this, 0, name, trace, id);
return savepoint;
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Creates a new statement.
*
* @return the new statement
* @throws SQLException if the connection is closed
*/
public Statement createStatement() throws SQLException {
try {
int id = getNextId(TraceObject.STATEMENT);
if (isDebugEnabled()) {
debugCodeAssign("Statement", TraceObject.STATEMENT, id, "createStatement()");
}
checkClosed();
return new JdbcStatement(
this,
id,
ResultSet.TYPE_FORWARD_ONLY,
SysProperties.DEFAULT_RESULT_SET_CONCURRENCY,
false);
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Switches auto commit on or off. Calling this function does not commit the current transaction.
*
* @param autoCommit true for auto commit on, false for off
* @throws SQLException if the connection is closed
*/
public synchronized void setAutoCommit(boolean autoCommit) throws SQLException {
try {
if (isDebugEnabled()) {
debugCode("setAutoCommit(" + autoCommit + ");");
}
checkClosed();
if (autoCommit) {
setAutoCommitTrue = prepareCommand("SET AUTOCOMMIT TRUE", setAutoCommitTrue);
setAutoCommitTrue.executeUpdate();
} else {
setAutoCommitFalse = prepareCommand("SET AUTOCOMMIT FALSE", setAutoCommitFalse);
setAutoCommitFalse.executeUpdate();
}
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Creates a new callable statement.
*
* @return the callable statement
* @throws SQLException if the connection is closed or the statement is not valid
*/
public CallableStatement prepareCall(String sql) throws SQLException {
try {
int id = getNextId(TraceObject.CALLABLE_STATEMENT);
if (isDebugEnabled()) {
debugCodeAssign(
"CallableStatement",
TraceObject.CALLABLE_STATEMENT,
id,
"prepareCall(" + quote(sql) + ")");
}
checkClosed();
sql = translateSQL(sql);
return new JdbcCallableStatement(
this, sql, id, ResultSet.TYPE_FORWARD_ONLY, SysProperties.DEFAULT_RESULT_SET_CONCURRENCY);
} catch (Exception e) {
throw logAndConvert(e);
}
}
/**
* Creates a callable statement with the specified result set type and concurrency.
*
* @return the callable statement
* @throws SQLException if the connection is closed or the result set type or concurrency are not
* supported
*/
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency)
throws SQLException {
try {
int id = getNextId(TraceObject.CALLABLE_STATEMENT);
if (isDebugEnabled()) {
debugCodeAssign(
"CallableStatement",
TraceObject.CALLABLE_STATEMENT,
id,
"prepareCall(" + quote(sql) + ", " + resultSetType + ", " + resultSetConcurrency + ")");
}
checkTypeConcurrency(resultSetType, resultSetConcurrency);
checkClosed();
sql = translateSQL(sql);
return new JdbcCallableStatement(this, sql, id, resultSetType, resultSetConcurrency);
} catch (Exception e) {
throw logAndConvert(e);
}
}
/** INTERNAL */
public int getQueryTimeout() throws SQLException {
try {
debugCodeCall("getQueryTimeout");
checkClosed();
getQueryTimeout =
prepareCommand(
"SELECT VALUE FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME=?", getQueryTimeout);
getQueryTimeout.getParameters().get(0).setValue(ValueString.get("QUERY_TIMEOUT"), false);
ResultInterface result = getQueryTimeout.executeQuery(0, false);
result.next();
int queryTimeout = result.currentRow()[0].getInt();
result.close();
if (queryTimeout == 0) {
return 0;
}
// round to the next second, otherwise 999 millis would return 0 seconds
return (queryTimeout + 999) / 1000;
} catch (Exception e) {
throw logAndConvert(e);
}
}
private void checkClosed() {
conn.checkClosed();
if (value == null) {
throw DbException.get(ErrorCode.OBJECT_CLOSED);
}
}
/**
* Check if this connection is closed. The next operation may be a write request.
*
* @throws SQLException if the connection or session is closed
*/
private void checkClosedForWrite() throws SQLException {
checkClosed(true);
}
String getURL() throws SQLException {
checkClosed();
return url;
}
String getUser() throws SQLException {
checkClosed();
return user;
}
/**
* INTERNAL. Check if this connection is closed. The next operation is a read request.
*
* @throws SQLException if the connection or session is closed
*/
protected void checkClosed() throws SQLException {
checkClosed(false);
}
