import org.postgresql.core.*;
/**
- * $Id: Connection.java,v 1.29 2001/09/10 15:07:05 momjian Exp $
+ * $Id: Connection.java,v 1.30 2001/10/09 20:47:35 barry Exp $
*
* This abstract class is used by org.postgresql.Driver to open either the JDBC1 or
* JDBC2 versions of the Connection class.
// Now make the initial connection
try
{
- pg_stream = new PG_Stream(host, port);
+ pg_stream = new PG_Stream(host, port);
} catch (ConnectException cex) {
- // Added by Peter Mount <peter@retep.org.uk>
- // ConnectException is thrown when the connection cannot be made.
- // we trap this an return a more meaningful message for the end user
- throw new PSQLException ("postgresql.con.refused");
+
// Added by Peter Mount <peter@retep.org.uk>
+ // ConnectException is thrown when the connection cannot be made.
+ // we trap this an return a more meaningful message for the end user
+ throw new PSQLException ("postgresql.con.refused");
} catch (IOException e) {
- throw new PSQLException ("postgresql.con.failed",e);
+ throw new PSQLException ("postgresql.con.failed",e);
}
// Now we need to construct and send a startup packet
try
- {
- // Ver 6.3 code
- pg_stream.SendInteger(4+4+SM_DATABASE+SM_USER+SM_OPTIONS+SM_UNUSED+SM_TTY,4);
- pg_stream.SendInteger(PG_PROTOCOL_LATEST_MAJOR,2);
- pg_stream.SendInteger(PG_PROTOCOL_LATEST_MINOR,2);
- pg_stream.Send(database.getBytes(),SM_DATABASE);
-
- // This last send includes the unused fields
- pg_stream.Send(PG_USER.getBytes(),SM_USER+SM_OPTIONS+SM_UNUSED+SM_TTY);
-
- // now flush the startup packets to the backend
- pg_stream.flush();
-
- // Now get the response from the backend, either an error message
- // or an authentication request
- int areq = -1; // must have a value here
- do {
- int beresp = pg_stream.ReceiveChar();
- switch(beresp)
- {
- case 'E':
- // An error occured, so pass the error message to the
- // user.
- //
- // The most common one to be thrown here is:
- // "User authentication failed"
- //
+ {
+ // Ver 6.3 code
+ pg_stream.SendInteger(4+4+SM_DATABASE+SM_USER+SM_OPTIONS+SM_UNUSED+SM_TTY,4);
+ pg_stream.SendInteger(PG_PROTOCOL_LATEST_MAJOR,2);
+ pg_stream.SendInteger(PG_PROTOCOL_LATEST_MINOR,2);
+ pg_stream.Send(database.getBytes(),SM_DATABASE);
+
+ // This last send includes the unused fields
+ pg_stream.Send(PG_USER.getBytes(),SM_USER+SM_OPTIONS+SM_UNUSED+SM_TTY);
+
+ // now flush the startup packets to the backend
+ pg_stream.flush();
+
+ // Now get the response from the backend, either an error message
+ // or an authentication request
+ int areq = -1; // must have a value here
+ do {
+ int beresp = pg_stream.ReceiveChar();
+ switch(beresp)
+ {
+ case 'E':
+ // An error occured, so pass the error message to the
+ // user.
+ //
+ // The most common one to be thrown here is:
+ // "User authentication failed"
+ //
throw new SQLException(pg_stream.ReceiveString(encoding));
- case 'R':
- // Get the type of request
- areq = pg_stream.ReceiveIntegerR(4);
-
- // Get the password salt if there is one
- if(areq == AUTH_REQ_CRYPT) {
- byte[] rst = new byte[2];
- rst[0] = (byte)pg_stream.ReceiveChar();
- rst[1] = (byte)pg_stream.ReceiveChar();
- salt = new String(rst,0,2);
- DriverManager.println("Salt="+salt);
- }
-
- // now send the auth packet
- switch(areq)
- {
- case AUTH_REQ_OK:
- break;
-
- case AUTH_REQ_KRB4:
- DriverManager.println("postgresql: KRB4");
- throw new PSQLException("postgresql.con.kerb4");
-
- case AUTH_REQ_KRB5:
- DriverManager.println("postgresql: KRB5");
- throw new PSQLException("postgresql.con.kerb5");
-
- case AUTH_REQ_PASSWORD:
- DriverManager.println("postgresql: PASSWORD");
- pg_stream.SendInteger(5+PG_PASSWORD.length(),4);
- pg_stream.Send(PG_PASSWORD.getBytes());
- pg_stream.SendInteger(0,1);
- pg_stream.flush();
- break;
-
- case AUTH_REQ_CRYPT:
- DriverManager.println("postgresql: CRYPT");
- String crypted = UnixCrypt.crypt(salt,PG_PASSWORD);
- pg_stream.SendInteger(5+crypted.length(),4);
- pg_stream.Send(crypted.getBytes());
- pg_stream.SendInteger(0,1);
- pg_stream.flush();
- break;
-
- default:
- throw new PSQLException("postgresql.con.auth",new Integer(areq));
- }
- break;
-
- default:
- throw new PSQLException("postgresql.con.authfail");
- }
- } while(areq != AUTH_REQ_OK);
-
- } catch (IOException e) {
- throw new PSQLException("postgresql.con.failed",e);
- }
+ case 'R':
+ // Get the type of request
+ areq = pg_stream.ReceiveIntegerR(4);
+
+ // Get the password salt if there is one
+ if(areq == AUTH_REQ_CRYPT) {
+ byte[] rst = new byte[2];
+ rst[0] = (byte)pg_stream.ReceiveChar();
+ rst[1] = (byte)pg_stream.ReceiveChar();
+ salt = new String(rst,0,2);
+ DriverManager.println("Salt="+salt);
+ }
+
+ // now send the auth packet
+ switch(areq)
+ {
+ case AUTH_REQ_OK:
+ break;
+
+ case AUTH_REQ_KRB4:
+ DriverManager.println("postgresql: KRB4");
+ throw new PSQLException("postgresql.con.kerb4");
+
+ case AUTH_REQ_KRB5:
+ DriverManager.println("postgresql: KRB5");
+ throw new PSQLException("postgresql.con.kerb5");
+
+ case AUTH_REQ_PASSWORD:
+ DriverManager.println("postgresql: PASSWORD");
+ pg_stream.SendInteger(5+PG_PASSWORD.length(),4);
+ pg_stream.Send(PG_PASSWORD.getBytes());
+ pg_stream.SendInteger(0,1);
+ pg_stream.flush();
+ break;
+
+ case AUTH_REQ_CRYPT:
+ DriverManager.println("postgresql: CRYPT");
+ String crypted = UnixCrypt.crypt(salt,PG_PASSWORD);
+ pg_stream.SendInteger(5+crypted.length(),4);
+ pg_stream.Send(crypted.getBytes());
+ pg_stream.SendInteger(0,1);
+ pg_stream.flush();
+ break;
+
+ default:
+ throw new PSQLException("postgresql.con.auth",new Integer(areq));
+ }
+ break;
+
+ default:
+ throw new PSQLException("postgresql.con.authfail");
+ }
+ } while(areq != AUTH_REQ_OK);
+
+ } catch (IOException e) {
+ throw new PSQLException("postgresql.con.failed",e);
+ }
// As of protocol version 2.0, we should now receive the cancellation key and the pid
pid = pg_stream.ReceiveInteger(4);
ckey = pg_stream.ReceiveInteger(4);
break;
- case 'E':
- case 'N':
+ case 'E':
+ case 'N':
throw new SQLException(pg_stream.ReceiveString(encoding));
default:
throw new PSQLException("postgresql.con.setup");
beresp = pg_stream.ReceiveChar();
switch(beresp) {
case 'Z':
- break;
- case 'E':
- case 'N':
+ break;
+ case 'E':
+ case 'N':
throw new SQLException(pg_stream.ReceiveString(encoding));
default:
throw new PSQLException("postgresql.con.setup");
// used, so we denote this with 'UNKNOWN'.
final String encodingQuery =
- "case when pg_encoding_to_char(1) = 'SQL_ASCII' then 'UNKNOWN' else getdatabaseencoding() end";
+ "case when pg_encoding_to_char(1) = 'SQL_ASCII' then 'UNKNOWN' else getdatabaseencoding() end";
// Set datestyle and fetch db encoding in a single call, to avoid making
// more than one round trip to the backend during connection startup.
java.sql.ResultSet resultSet =
- ExecSQL("set datestyle to 'ISO'; select version(), " + encodingQuery + ";");
+ ExecSQL("set datestyle to 'ISO'; select version(), " + encodingQuery + ";");
if (! resultSet.next()) {
- throw new PSQLException("postgresql.con.failed", "failed getting backend encoding");
+ throw new PSQLException("postgresql.con.failed", "failed getting backend encoding");
}
String version = resultSet.getString(1);
dbVersionNumber = extractVersionNumber(version);
*/
public void addWarning(String msg)
{
- DriverManager.println(msg);
-
- // Add the warning to the chain
- if(firstWarning!=null)
- firstWarning.setNextWarning(new SQLWarning(msg));
- else
- firstWarning = new SQLWarning(msg);
-
- // Now check for some specific messages
-
- // This is obsolete in 6.5, but I've left it in here so if we need to use this
- // technique again, we'll know where to place it.
- //
- // This is generated by the SQL "show datestyle"
- //if(msg.startsWith("NOTICE:") && msg.indexOf("DateStyle")>0) {
- //// 13 is the length off "DateStyle is "
- //msg = msg.substring(msg.indexOf("DateStyle is ")+13);
- //
- //for(int i=0;i<dateStyles.length;i+=2)
- //if(msg.startsWith(dateStyles[i]))
- //currentDateStyle=i+1; // this is the index of the format
- //}
+ DriverManager.println(msg);
+
+ // Add the warning to the chain
+ if(firstWarning!=null)
+ firstWarning.setNextWarning(new SQLWarning(msg));
+ else
+ firstWarning = new SQLWarning(msg);
+
+ // Now check for some specific messages
+
+ // This is obsolete in 6.5, but I've left it in here so if we need to use this
+ // technique again, we'll know where to place it.
+ //
+ // This is generated by the SQL "show datestyle"
+ //if(msg.startsWith("NOTICE:") && msg.indexOf("DateStyle")>0) {
+ //// 13 is the length off "DateStyle is "
+ //msg = msg.substring(msg.indexOf("DateStyle is ")+13);
+ //
+ //for(int i=0;i<dateStyles.length;i+=2)
+ //if(msg.startsWith(dateStyles[i]))
+ //currentDateStyle=i+1; // this is the index of the format
+ //}
}
/**
*/
public java.sql.ResultSet ExecSQL(String sql, java.sql.Statement stat) throws SQLException
{
- return new QueryExecutor(sql, stat, pg_stream, this).execute();
+ return new QueryExecutor(sql, stat, pg_stream, this).execute();
}
/**
*/
public void setCursorName(String cursor) throws SQLException
{
- this.cursor = cursor;
+ this.cursor = cursor;
}
/**
*/
public String getCursorName() throws SQLException
{
- return cursor;
+ return cursor;
}
/**
*/
public String getURL() throws SQLException
{
- return this_url;
+ return this_url;
}
/**
*/
public String getUserName() throws SQLException
{
- return PG_USER;
+ return PG_USER;
}
/**
*/
public Fastpath getFastpathAPI() throws SQLException
{
- if(fastpath==null)
- fastpath = new Fastpath(this,pg_stream);
- return fastpath;
+ if(fastpath==null)
+ fastpath = new Fastpath(this,pg_stream);
+ return fastpath;
}
// This holds a reference to the Fastpath API if already open
*/
public LargeObjectManager getLargeObjectAPI() throws SQLException
{
- if(largeobject==null)
- largeobject = new LargeObjectManager(this);
- return largeobject;
+ if(largeobject==null)
+ largeobject = new LargeObjectManager(this);
+ return largeobject;
}
// This holds a reference to the LargeObject API if already open
*/
public Object getObject(String type,String value) throws SQLException
{
- try {
- Object o = objectTypes.get(type);
-
- // If o is null, then the type is unknown, so check to see if type
- // is an actual table name. If it does, see if a Class is known that
- // can handle it
- if(o == null) {
- Serialize ser = new Serialize(this,type);
- objectTypes.put(type,ser);
- return ser.fetch(Integer.parseInt(value));
- }
-
- // If o is not null, and it is a String, then its a class name that
- // extends PGobject.
- //
- // This is used to implement the org.postgresql unique types (like lseg,
- // point, etc).
- if(o instanceof String) {
- // 6.3 style extending PG_Object
- PGobject obj = null;
- obj = (PGobject)(Class.forName((String)o).newInstance());
- obj.setType(type);
- obj.setValue(value);
- return (Object)obj;
- } else {
- // If it's an object, it should be an instance of our Serialize class
- // If so, then call it's fetch method.
- if(o instanceof Serialize)
- return ((Serialize)o).fetch(Integer.parseInt(value));
- }
- } catch(SQLException sx) {
- // rethrow the exception. Done because we capture any others next
- sx.fillInStackTrace();
- throw sx;
- } catch(Exception ex) {
- throw new PSQLException("postgresql.con.creobj",type,ex);
- }
-
- // should never be reached
- return null;
+ try {
+ Object o = objectTypes.get(type);
+
+ // If o is null, then the type is unknown, so check to see if type
+ // is an actual table name. If it does, see if a Class is known that
+ // can handle it
+ if(o == null) {
+ Serialize ser = new Serialize(this,type);
+ objectTypes.put(type,ser);
+ return ser.fetch(Integer.parseInt(value));
+ }
+
+ // If o is not null, and it is a String, then its a class name that
+ // extends PGobject.
+ //
+ // This is used to implement the org.postgresql unique types (like lseg,
+ // point, etc).
+ if(o instanceof String) {
+ // 6.3 style extending PG_Object
+ PGobject obj = null;
+ obj = (PGobject)(Class.forName((String)o).newInstance());
+ obj.setType(type);
+ obj.setValue(value);
+ return (Object)obj;
+ } else {
+ // If it's an object, it should be an instance of our Serialize class
+ // If so, then call it's fetch method.
+ if(o instanceof Serialize)
+ return ((Serialize)o).fetch(Integer.parseInt(value));
+ }
+ } catch(SQLException sx) {
+ // rethrow the exception. Done because we capture any others next
+ sx.fillInStackTrace();
+ throw sx;
+ } catch(Exception ex) {
+ throw new PSQLException("postgresql.con.creobj",type,ex);
+ }
+
+ // should never be reached
+ return null;
}
/**
*/
public int putObject(Object o) throws SQLException
{
- try {
- String type = o.getClass().getName();
- Object x = objectTypes.get(type);
-
- // If x is null, then the type is unknown, so check to see if type
- // is an actual table name. If it does, see if a Class is known that
- // can handle it
- if(x == null) {
- Serialize ser = new Serialize(this,type);
- objectTypes.put(type,ser);
- return ser.store(o);
- }
-
- // If it's an object, it should be an instance of our Serialize class
- // If so, then call it's fetch method.
- if(x instanceof Serialize)
- return ((Serialize)x).store(o);
-
- // Thow an exception because the type is unknown
- throw new PSQLException("postgresql.con.strobj");
-
- } catch(SQLException sx) {
- // rethrow the exception. Done because we capture any others next
- sx.fillInStackTrace();
- throw sx;
- } catch(Exception ex) {
- throw new PSQLException("postgresql.con.strobjex",ex);
- }
+ try {
+ String type = o.getClass().getName();
+ Object x = objectTypes.get(type);
+
+ // If x is null, then the type is unknown, so check to see if type
+ // is an actual table name. If it does, see if a Class is known that
+ // can handle it
+ if(x == null) {
+ Serialize ser = new Serialize(this,type);
+ objectTypes.put(type,ser);
+ return ser.store(o);
+ }
+
+ // If it's an object, it should be an instance of our Serialize class
+ // If so, then call it's fetch method.
+ if(x instanceof Serialize)
+ return ((Serialize)x).store(o);
+
+ // Thow an exception because the type is unknown
+ throw new PSQLException("postgresql.con.strobj");
+
+ } catch(SQLException sx) {
+ // rethrow the exception. Done because we capture any others next
+ sx.fillInStackTrace();
+ throw sx;
+ } catch(Exception ex) {
+ throw new PSQLException("postgresql.con.strobjex",ex);
+ }
}
/**
*/
public void addDataType(String type,String name)
{
- objectTypes.put(type,name);
+ objectTypes.put(type,name);
}
// This holds the available types
// the full class name of the handling class.
//
private static final String defaultObjectTypes[][] = {
- {"box", "org.postgresql.geometric.PGbox"},
- {"circle", "org.postgresql.geometric.PGcircle"},
- {"line", "org.postgresql.geometric.PGline"},
- {"lseg", "org.postgresql.geometric.PGlseg"},
- {"path", "org.postgresql.geometric.PGpath"},
- {"point", "org.postgresql.geometric.PGpoint"},
- {"polygon", "org.postgresql.geometric.PGpolygon"},
- {"money", "org.postgresql.util.PGmoney"}
+ {"box", "org.postgresql.geometric.PGbox"},
+ {"circle", "org.postgresql.geometric.PGcircle"},
+ {"line", "org.postgresql.geometric.PGline"},
+ {"lseg", "org.postgresql.geometric.PGlseg"},
+ {"path", "org.postgresql.geometric.PGpath"},
+ {"point", "org.postgresql.geometric.PGpoint"},
+ {"polygon", "org.postgresql.geometric.PGpolygon"},
+ {"money", "org.postgresql.util.PGmoney"}
};
// This initialises the objectTypes hashtable
private void initObjectTypes()
{
- for(int i=0;i<defaultObjectTypes.length;i++)
- objectTypes.put(defaultObjectTypes[i][0],defaultObjectTypes[i][1]);
+ for(int i=0;i<defaultObjectTypes.length;i++)
+ objectTypes.put(defaultObjectTypes[i][0],defaultObjectTypes[i][1]);
}
// These are required by other common classes
* This returns a resultset. It must be overridden, so that the correct
* version (from jdbc1 or jdbc2) are returned.
*/
- public abstract java.sql.ResultSet getResultSet(org.postgresql.Connection conn,java.sql.Statement stat, Field[] fields, Vector tuples, String status, int updateCount,int insertOID) throws SQLException;
+ public abstract java.sql.ResultSet getResultSet(org.postgresql.Connection conn,java.sql.Statement stat, Field[] fields, Vector tuples, String status, int updateCount,int insertOID, boolean binaryCursor) throws SQLException;
/**
* In some cases, it is desirable to immediately release a Connection's
* @exception SQLException if a database access error occurs
*/
public void close() throws SQLException {
- if (pg_stream != null) {
- try {
- pg_stream.SendChar('X');
- pg_stream.flush();
- pg_stream.close();
- } catch (IOException e) {}
- pg_stream = null;
- }
+ if (pg_stream != null) {
+ try {
+ pg_stream.SendChar('X');
+ pg_stream.flush();
+ pg_stream.close();
+ } catch (IOException e) {}
+ pg_stream = null;
+ }
}
/**
* @exception SQLException if a database access error occurs
*/
public String nativeSQL(String sql) throws SQLException {
- return sql;
+ return sql;
}
/**
* @exception SQLException if a database access error occurs
*/
public SQLWarning getWarnings() throws SQLException {
- return firstWarning;
+ return firstWarning;
}
/**
* @exception SQLException if a database access error occurs
*/
public void clearWarnings() throws SQLException {
- firstWarning = null;
+ firstWarning = null;
}
* @exception SQLException if a database access error occurs
*/
public void setReadOnly(boolean readOnly) throws SQLException {
- this.readOnly = readOnly;
+ this.readOnly = readOnly;
}
/**
* @exception SQLException if a database access error occurs
*/
public boolean isReadOnly() throws SQLException {
- return readOnly;
+ return readOnly;
}
/**
* @exception SQLException if a database access error occurs
*/
public void setAutoCommit(boolean autoCommit) throws SQLException {
- if (this.autoCommit == autoCommit)
- return;
- if (autoCommit)
- ExecSQL("end");
- else {
+ if (this.autoCommit == autoCommit)
+ return;
+ if (autoCommit)
+ ExecSQL("end");
+ else {
if (haveMinimumServerVersion("7.1")){
ExecSQL("begin;"+getIsolationLevelSQL());
}else{
- ExecSQL("begin");
- ExecSQL(getIsolationLevelSQL());
+ ExecSQL("begin");
+ ExecSQL(getIsolationLevelSQL());
}
- }
- this.autoCommit = autoCommit;
+ }
+ this.autoCommit = autoCommit;
}
/**
* @see setAutoCommit
*/
public boolean getAutoCommit() throws SQLException {
- return this.autoCommit;
+ return this.autoCommit;
}
/**
* @see setAutoCommit
*/
public void commit() throws SQLException {
- if (autoCommit)
- return;
- if (haveMinimumServerVersion("7.1")){
- ExecSQL("commit;begin;"+getIsolationLevelSQL());
- }else{
- ExecSQL("commit");
- ExecSQL("begin");
- ExecSQL(getIsolationLevelSQL());
+ if (autoCommit)
+ return;
+ if (haveMinimumServerVersion("7.1")){
+ ExecSQL("commit;begin;"+getIsolationLevelSQL());
+ }else{
+ ExecSQL("commit");
+ ExecSQL("begin");
+ ExecSQL(getIsolationLevelSQL());
}
}
* @see commit
*/
public void rollback() throws SQLException {
- if (autoCommit)
- return;
- if (haveMinimumServerVersion("7.1")){
- ExecSQL("rollback; begin;"+getIsolationLevelSQL());
- }else{
- ExecSQL("rollback");
- ExecSQL("begin");
- ExecSQL(getIsolationLevelSQL());
- }
+ if (autoCommit)
+ return;
+ if (haveMinimumServerVersion("7.1")){
+ ExecSQL("rollback; begin;"+getIsolationLevelSQL());
+ }else{
+ ExecSQL("rollback");
+ ExecSQL("begin");
+ ExecSQL(getIsolationLevelSQL());
+ }
}
/**
* @exception SQLException if a database access error occurs
*/
public int getTransactionIsolation() throws SQLException {
- clearWarnings();
- ExecSQL("show xactisolevel");
-
- SQLWarning warning = getWarnings();
- if (warning != null) {
- String message = warning.getMessage();
- clearWarnings();
- if (message.indexOf("READ COMMITTED") != -1)
- return java.sql.Connection.TRANSACTION_READ_COMMITTED;
- else if (message.indexOf("READ UNCOMMITTED") != -1)
- return java.sql.Connection.TRANSACTION_READ_UNCOMMITTED;
- else if (message.indexOf("REPEATABLE READ") != -1)
- return java.sql.Connection.TRANSACTION_REPEATABLE_READ;
- else if (message.indexOf("SERIALIZABLE") != -1)
- return java.sql.Connection.TRANSACTION_SERIALIZABLE;
- }
- return java.sql.Connection.TRANSACTION_READ_COMMITTED;
+ clearWarnings();
+ ExecSQL("show xactisolevel");
+
+ SQLWarning warning = getWarnings();
+ if (warning != null) {
+ String message = warning.getMessage();
+ clearWarnings();
+ if (message.indexOf("READ COMMITTED") != -1)
+ return java.sql.Connection.TRANSACTION_READ_COMMITTED;
+ else if (message.indexOf("READ UNCOMMITTED") != -1)
+ return java.sql.Connection.TRANSACTION_READ_UNCOMMITTED;
+ else if (message.indexOf("REPEATABLE READ") != -1)
+ return java.sql.Connection.TRANSACTION_REPEATABLE_READ;
+ else if (message.indexOf("SERIALIZABLE") != -1)
+ return java.sql.Connection.TRANSACTION_SERIALIZABLE;
+ }
+ return java.sql.Connection.TRANSACTION_READ_COMMITTED;
}
/**
* You can call this method to try to change the transaction
* isolation level using one of the TRANSACTION_* values.
- *
+ *
* <B>Note:</B> setTransactionIsolation cannot be called while
* in the middle of a transaction
*
* @see java.sql.DatabaseMetaData#supportsTransactionIsolationLevel
*/
public void setTransactionIsolation(int level) throws SQLException {
- //In 7.1 and later versions of the server it is possible using
+ //In 7.1 and later versions of the server it is possible using
//the "set session" command to set this once for all future txns
- //however in 7.0 and prior versions it is necessary to set it in
+ //however in 7.0 and prior versions it is necessary to set it in
//each transaction, thus adding complexity below.
//When we decide to drop support for servers older than 7.1
//this can be simplified
isolationLevel = level;
String isolationLevelSQL;
- if (!haveMinimumServerVersion("7.1")) {
- isolationLevelSQL = getIsolationLevelSQL();
- } else {
- isolationLevelSQL = "SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL ";
- switch(isolationLevel) {
- case java.sql.Connection.TRANSACTION_READ_COMMITTED:
- isolationLevelSQL += "READ COMMITTED";
- break;
- case java.sql.Connection.TRANSACTION_SERIALIZABLE:
- isolationLevelSQL += "SERIALIZABLE";
- break;
- default:
- throw new PSQLException("postgresql.con.isolevel",
- new Integer(isolationLevel));
- }
- }
- ExecSQL(isolationLevelSQL);
+ if (!haveMinimumServerVersion("7.1")) {
+ isolationLevelSQL = getIsolationLevelSQL();
+ } else {
+ isolationLevelSQL = "SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL ";
+ switch(isolationLevel) {
+ case java.sql.Connection.TRANSACTION_READ_COMMITTED:
+ isolationLevelSQL += "READ COMMITTED";
+ break;
+ case java.sql.Connection.TRANSACTION_SERIALIZABLE:
+ isolationLevelSQL += "SERIALIZABLE";
+ break;
+ default:
+ throw new PSQLException("postgresql.con.isolevel",
+ new Integer(isolationLevel));
+ }
+ }
+ ExecSQL(isolationLevelSQL);
}
/**
* servers are dropped
*/
protected String getIsolationLevelSQL() throws SQLException {
- //7.1 and higher servers have a default specified so
- //no additional SQL is required to set the isolation level
- if (haveMinimumServerVersion("7.1")) {
+ //7.1 and higher servers have a default specified so
+ //no additional SQL is required to set the isolation level
+ if (haveMinimumServerVersion("7.1")) {
return "";
}
- StringBuffer sb = new StringBuffer("SET TRANSACTION ISOLATION LEVEL");
+ StringBuffer sb = new StringBuffer("SET TRANSACTION ISOLATION LEVEL");
- switch(isolationLevel) {
- case java.sql.Connection.TRANSACTION_READ_COMMITTED:
- sb.append(" READ COMMITTED");
+ switch(isolationLevel) {
+ case java.sql.Connection.TRANSACTION_READ_COMMITTED:
+ sb.append(" READ COMMITTED");
break;
- case java.sql.Connection.TRANSACTION_SERIALIZABLE:
- sb.append(" SERIALIZABLE");
+ case java.sql.Connection.TRANSACTION_SERIALIZABLE:
+ sb.append(" SERIALIZABLE");
break;
- default:
- throw new PSQLException("postgresql.con.isolevel",new Integer(isolationLevel));
- }
+ default:
+ throw new PSQLException("postgresql.con.isolevel",new Integer(isolationLevel));
+ }
return sb.toString();
}
*/
public String getCatalog() throws SQLException
{
- return PG_DATABASE;
+ return PG_DATABASE;
}
/**
*/
public void finalize() throws Throwable
{
- close();
+ close();
}
private static String extractVersionNumber(String fullVersionString)
* Get server version number
*/
public String getDBVersionNumber() {
- return dbVersionNumber;
+ return dbVersionNumber;
}
public boolean haveMinimumServerVersion(String ver) throws SQLException
}
}
-
+
* <p>The lifetime of a QueryExecutor object is from sending the query
* until the response has been received from the backend.
*
- * $Id: QueryExecutor.java,v 1.1 2001/09/06 03:58:59 momjian Exp $
+ * $Id: QueryExecutor.java,v 1.2 2001/10/09 20:47:35 barry Exp $
*/
public class QueryExecutor {
private final org.postgresql.Connection connection;
public QueryExecutor(String sql,
- java.sql.Statement statement,
- PG_Stream pg_stream,
- org.postgresql.Connection connection)
- throws SQLException
+ java.sql.Statement statement,
+ PG_Stream pg_stream,
+ org.postgresql.Connection connection)
+ throws SQLException
{
- this.sql = sql;
- this.statement = statement;
- this.pg_stream = pg_stream;
- this.connection = connection;
-
- if (statement != null)
- maxRows = statement.getMaxRows();
- else
- maxRows = 0;
+ this.sql = sql;
+ this.statement = statement;
+ this.pg_stream = pg_stream;
+ this.connection = connection;
+
+ if (statement != null)
+ maxRows = statement.getMaxRows();
+ else
+ maxRows = 0;
}
private Field[] fields = null;
private Vector tuples = new Vector();
+ private boolean binaryCursor = false;
private String status = null;
private int update_count = 1;
private int insert_oid = 0;
*/
public java.sql.ResultSet execute() throws SQLException {
- int fqp = 0;
- boolean hfr = false;
-
- synchronized(pg_stream) {
-
- sendQuery(sql);
-
- while (!hfr || fqp > 0) {
- int c = pg_stream.ReceiveChar();
-
- switch (c)
- {
- case 'A': // Asynchronous Notify
- int pid = pg_stream.ReceiveInteger(4);
- String msg = pg_stream.ReceiveString(connection.getEncoding());
- break;
- case 'B': // Binary Data Transfer
- receiveTuple(true);
- break;
- case 'C': // Command Status
- receiveCommandStatus();
-
- if (fields != null)
- hfr = true;
- else {
- sendQuery(" ");
- fqp++;
- }
- break;
- case 'D': // Text Data Transfer
- receiveTuple(false);
- break;
- case 'E': // Error Message
- throw new SQLException(pg_stream.ReceiveString(connection.getEncoding()));
- case 'I': // Empty Query
- int t = pg_stream.ReceiveChar();
- if (t != 0)
- throw new PSQLException("postgresql.con.garbled");
-
- if (fqp > 0)
- fqp--;
- if (fqp == 0)
- hfr = true;
- break;
- case 'N': // Error Notification
- connection.addWarning(pg_stream.ReceiveString(connection.getEncoding()));
- break;
- case 'P': // Portal Name
- String pname = pg_stream.ReceiveString(connection.getEncoding());
- break;
- case 'T': // MetaData Field Description
- receiveFields();
- break;
- case 'Z': // backend ready for query, ignore for now :-)
- break;
- default:
- throw new PSQLException("postgresql.con.type",
- new Character((char) c));
- }
- }
-
- return connection.getResultSet(connection, statement, fields, tuples, status, update_count, insert_oid);
- }
+ int fqp = 0;
+ boolean hfr = false;
+
+ synchronized(pg_stream) {
+
+ sendQuery(sql);
+
+ while (!hfr || fqp > 0) {
+ int c = pg_stream.ReceiveChar();
+
+ switch (c)
+ {
+ case 'A': // Asynchronous Notify
+ int pid = pg_stream.ReceiveInteger(4);
+ String msg = pg_stream.ReceiveString(connection.getEncoding());
+ break;
+ case 'B': // Binary Data Transfer
+ receiveTuple(true);
+ break;
+ case 'C': // Command Status
+ receiveCommandStatus();
+
+ if (fields != null)
+ hfr = true;
+ else {
+ sendQuery(" ");
+ fqp++;
+ }
+ break;
+ case 'D': // Text Data Transfer
+ receiveTuple(false);
+ break;
+ case 'E': // Error Message
+ throw new SQLException(pg_stream.ReceiveString(connection.getEncoding()));
+ case 'I': // Empty Query
+ int t = pg_stream.ReceiveChar();
+ if (t != 0)
+ throw new PSQLException("postgresql.con.garbled");
+
+ if (fqp > 0)
+ fqp--;
+ if (fqp == 0)
+ hfr = true;
+ break;
+ case 'N': // Error Notification
+ connection.addWarning(pg_stream.ReceiveString(connection.getEncoding()));
+ break;
+ case 'P': // Portal Name
+ String pname = pg_stream.ReceiveString(connection.getEncoding());
+ break;
+ case 'T': // MetaData Field Description
+ receiveFields();
+ break;
+ case 'Z': // backend ready for query, ignore for now :-)
+ break;
+ default:
+ throw new PSQLException("postgresql.con.type",
+ new Character((char) c));
+ }
+ }
+ return connection.getResultSet(connection, statement, fields, tuples, status, update_count, insert_oid, binaryCursor);
+ }
}
/**
* Send a query to the backend.
*/
private void sendQuery(String query) throws SQLException {
- try {
- pg_stream.SendChar('Q');
- pg_stream.Send(connection.getEncoding().encode(query));
- pg_stream.SendChar(0);
- pg_stream.flush();
-
- } catch (IOException e) {
- throw new PSQLException("postgresql.con.ioerror", e);
- }
+ try {
+ pg_stream.SendChar('Q');
+ pg_stream.Send(connection.getEncoding().encode(query));
+ pg_stream.SendChar(0);
+ pg_stream.flush();
+
+ } catch (IOException e) {
+ throw new PSQLException("postgresql.con.ioerror", e);
+ }
}
/**
* @param isBinary set if the tuple should be treated as binary data
*/
private void receiveTuple(boolean isBinary) throws SQLException {
- if (fields == null)
- throw new PSQLException("postgresql.con.tuple");
- Object tuple = pg_stream.ReceiveTuple(fields.length, isBinary);
- if (maxRows == 0 || tuples.size() < maxRows)
- tuples.addElement(tuple);
+ if (fields == null)
+ throw new PSQLException("postgresql.con.tuple");
+ Object tuple = pg_stream.ReceiveTuple(fields.length, isBinary);
+ if (isBinary) binaryCursor = true;
+ if (maxRows == 0 || tuples.size() < maxRows)
+ tuples.addElement(tuple);
}
/**
*/
private void receiveCommandStatus() throws SQLException {
- status = pg_stream.ReceiveString(connection.getEncoding());
-
- try {
- // Now handle the update count correctly.
- if (status.startsWith("INSERT") || status.startsWith("UPDATE") || status.startsWith("DELETE") || status.startsWith("MOVE")) {
- update_count = Integer.parseInt(status.substring(1 + status.lastIndexOf(' ')));
- }
- if (status.startsWith("INSERT")) {
- insert_oid = Integer.parseInt(status.substring(1 + status.indexOf(' '),
- status.lastIndexOf(' ')));
- }
- } catch (NumberFormatException nfe) {
- throw new PSQLException("postgresql.con.fathom", status);
- }
+ status = pg_stream.ReceiveString(connection.getEncoding());
+
+ try {
+ // Now handle the update count correctly.
+ if (status.startsWith("INSERT") || status.startsWith("UPDATE") || status.startsWith("DELETE") || status.startsWith("MOVE")) {
+ update_count = Integer.parseInt(status.substring(1 + status.lastIndexOf(' ')));
+ }
+ if (status.startsWith("INSERT")) {
+ insert_oid = Integer.parseInt(status.substring(1 + status.indexOf(' '),
+ status.lastIndexOf(' ')));
+ }
+ } catch (NumberFormatException nfe) {
+ throw new PSQLException("postgresql.con.fathom", status);
+ }
}
/**
* Receive the field descriptions from the back end.
*/
private void receiveFields() throws SQLException {
- if (fields != null)
- throw new PSQLException("postgresql.con.multres");
-
- int size = pg_stream.ReceiveIntegerR(2);
- fields = new Field[size];
-
- for (int i = 0; i < fields.length; i++) {
- String typeName = pg_stream.ReceiveString(connection.getEncoding());
- int typeOid = pg_stream.ReceiveIntegerR(4);
- int typeLength = pg_stream.ReceiveIntegerR(2);
- int typeModifier = pg_stream.ReceiveIntegerR(4);
- fields[i] = new Field(connection, typeName, typeOid, typeLength, typeModifier);
- }
+ if (fields != null)
+ throw new PSQLException("postgresql.con.multres");
+
+ int size = pg_stream.ReceiveIntegerR(2);
+ fields = new Field[size];
+
+ for (int i = 0; i < fields.length; i++) {
+ String typeName = pg_stream.ReceiveString(connection.getEncoding());
+ int typeOid = pg_stream.ReceiveIntegerR(4);
+ int typeLength = pg_stream.ReceiveIntegerR(2);
+ int typeModifier = pg_stream.ReceiveIntegerR(4);
+ fields[i] = new Field(connection, typeName, typeOid, typeLength, typeModifier);
+ }
}
}
projects / postgresql / commitdiff