org.postgresql.jdbc.PgConnection Maven / Gradle / Ivy
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/*
* Copyright (c) 2004, PostgreSQL Global Development Group
* See the LICENSE file in the project root for more information.
*/
package org.postgresql.jdbc;
import org.postgresql.Driver;
import org.postgresql.PGNotification;
import org.postgresql.PGProperty;
import org.postgresql.copy.CopyManager;
import org.postgresql.core.BaseConnection;
import org.postgresql.core.BaseStatement;
import org.postgresql.core.CachedQuery;
import org.postgresql.core.ConnectionFactory;
import org.postgresql.core.Encoding;
import org.postgresql.core.Oid;
import org.postgresql.core.Provider;
import org.postgresql.core.Query;
import org.postgresql.core.QueryExecutor;
import org.postgresql.core.ReplicationProtocol;
import org.postgresql.core.ResultHandlerBase;
import org.postgresql.core.ServerVersion;
import org.postgresql.core.SqlCommand;
import org.postgresql.core.TransactionState;
import org.postgresql.core.TypeInfo;
import org.postgresql.core.Utils;
import org.postgresql.core.Version;
import org.postgresql.fastpath.Fastpath;
import org.postgresql.largeobject.LargeObjectManager;
import org.postgresql.replication.PGReplicationConnection;
import org.postgresql.replication.PGReplicationConnectionImpl;
import org.postgresql.util.GT;
import org.postgresql.util.HostSpec;
import org.postgresql.util.LruCache;
import org.postgresql.util.PGBinaryObject;
import org.postgresql.util.PGobject;
import org.postgresql.util.PSQLException;
import org.postgresql.util.PSQLState;
import org.postgresql.xml.DefaultPGXmlFactoryFactory;
import org.postgresql.xml.LegacyInsecurePGXmlFactoryFactory;
import org.postgresql.xml.PGXmlFactoryFactory;
import java.io.IOException;
import java.sql.Array;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.ClientInfoStatus;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.NClob;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLPermission;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Savepoint;
import java.sql.Statement;
import java.sql.Struct;
import java.sql.Types;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Locale;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Properties;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TimeZone;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.Executor;
import java.util.logging.Level;
import java.util.logging.Logger;
public class PgConnection implements BaseConnection {
private static final Logger LOGGER = Logger.getLogger(PgConnection.class.getName());
private static final Set SUPPORTED_BINARY_OIDS = getSupportedBinaryOids();
private static final SQLPermission SQL_PERMISSION_ABORT = new SQLPermission("callAbort");
private static final SQLPermission SQL_PERMISSION_NETWORK_TIMEOUT = new SQLPermission("setNetworkTimeout");
private enum ReadOnlyBehavior {
ignore,
transaction,
always;
}
//
// Data initialized on construction:
//
private final Properties clientInfo;
/* URL we were created via */
private final String creatingURL;
private final ReadOnlyBehavior readOnlyBehavior;
private Throwable openStackTrace;
/* Actual network handler */
private final QueryExecutor queryExecutor;
/* Query that runs COMMIT */
private final Query commitQuery;
/* Query that runs ROLLBACK */
private final Query rollbackQuery;
private final CachedQuery setSessionReadOnly;
private final CachedQuery setSessionNotReadOnly;
private final TypeInfo typeCache;
private boolean disableColumnSanitiser = false;
// Default statement prepare threshold.
protected int prepareThreshold;
/**
* Default fetch size for statement.
*
* @see PGProperty#DEFAULT_ROW_FETCH_SIZE
*/
protected int defaultFetchSize;
// Default forcebinary option.
protected boolean forcebinary = false;
private int rsHoldability = ResultSet.CLOSE_CURSORS_AT_COMMIT;
private int savepointId = 0;
// Connection's autocommit state.
private boolean autoCommit = true;
// Connection's readonly state.
private boolean readOnly = false;
// Filter out database objects for which the current user has no privileges granted from the DatabaseMetaData
private boolean hideUnprivilegedObjects ;
// Bind String to UNSPECIFIED or VARCHAR?
private final boolean bindStringAsVarchar;
// Current warnings; there might be more on queryExecutor too.
private SQLWarning firstWarning = null;
// Timer for scheduling TimerTasks for this connection.
// Only instantiated if a task is actually scheduled.
private volatile Timer cancelTimer = null;
private PreparedStatement checkConnectionQuery;
/**
* Replication protocol in current version postgresql(10devel) supports a limited number of
* commands.
*/
private final boolean replicationConnection;
private final LruCache fieldMetadataCache;
private final String xmlFactoryFactoryClass;
private PGXmlFactoryFactory xmlFactoryFactory;
final CachedQuery borrowQuery(String sql) throws SQLException {
return queryExecutor.borrowQuery(sql);
}
final CachedQuery borrowCallableQuery(String sql) throws SQLException {
return queryExecutor.borrowCallableQuery(sql);
}
private CachedQuery borrowReturningQuery(String sql, String[] columnNames) throws SQLException {
return queryExecutor.borrowReturningQuery(sql, columnNames);
}
@Override
public CachedQuery createQuery(String sql, boolean escapeProcessing, boolean isParameterized,
String... columnNames)
throws SQLException {
return queryExecutor.createQuery(sql, escapeProcessing, isParameterized, columnNames);
}
void releaseQuery(CachedQuery cachedQuery) {
queryExecutor.releaseQuery(cachedQuery);
}
@Override
public void setFlushCacheOnDeallocate(boolean flushCacheOnDeallocate) {
queryExecutor.setFlushCacheOnDeallocate(flushCacheOnDeallocate);
LOGGER.log(Level.FINE, " setFlushCacheOnDeallocate = {0}", flushCacheOnDeallocate);
}
//
// Ctor.
//
public PgConnection(HostSpec[] hostSpecs,
String user,
String database,
Properties info,
String url) throws SQLException {
// Print out the driver version number
LOGGER.log(Level.FINE, org.postgresql.util.DriverInfo.DRIVER_FULL_NAME);
this.creatingURL = url;
this.readOnlyBehavior = getReadOnlyBehavior(PGProperty.READ_ONLY_MODE.get(info));
setDefaultFetchSize(PGProperty.DEFAULT_ROW_FETCH_SIZE.getInt(info));
setPrepareThreshold(PGProperty.PREPARE_THRESHOLD.getInt(info));
if (prepareThreshold == -1) {
setForceBinary(true);
}
// Now make the initial connection and set up local state
this.queryExecutor = ConnectionFactory.openConnection(hostSpecs, user, database, info);
// WARNING for unsupported servers (8.1 and lower are not supported)
if (LOGGER.isLoggable(Level.WARNING) && !haveMinimumServerVersion(ServerVersion.v8_2)) {
LOGGER.log(Level.WARNING, "Unsupported Server Version: {0}", queryExecutor.getServerVersion());
}
setSessionReadOnly = createQuery("SET SESSION CHARACTERISTICS AS TRANSACTION READ ONLY", false, true);
setSessionNotReadOnly = createQuery("SET SESSION CHARACTERISTICS AS TRANSACTION READ WRITE", false, true);
// Set read-only early if requested
if (PGProperty.READ_ONLY.getBoolean(info)) {
setReadOnly(true);
}
this.hideUnprivilegedObjects = PGProperty.HIDE_UNPRIVILEGED_OBJECTS.getBoolean(info);
Set binaryOids = getBinaryOids(info);
// split for receive and send for better control
Set useBinarySendForOids = new HashSet(binaryOids);
Set useBinaryReceiveForOids = new HashSet(binaryOids);
/*
* Does not pass unit tests because unit tests expect setDate to have millisecond accuracy
* whereas the binary transfer only supports date accuracy.
*/
useBinarySendForOids.remove(Oid.DATE);
queryExecutor.setBinaryReceiveOids(useBinaryReceiveForOids);
queryExecutor.setBinarySendOids(useBinarySendForOids);
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(Level.FINEST, " types using binary send = {0}", oidsToString(useBinarySendForOids));
LOGGER.log(Level.FINEST, " types using binary receive = {0}", oidsToString(useBinaryReceiveForOids));
LOGGER.log(Level.FINEST, " integer date/time = {0}", queryExecutor.getIntegerDateTimes());
}
//
// String -> text or unknown?
//
String stringType = PGProperty.STRING_TYPE.get(info);
if (stringType != null) {
if (stringType.equalsIgnoreCase("unspecified")) {
bindStringAsVarchar = false;
} else if (stringType.equalsIgnoreCase("varchar")) {
bindStringAsVarchar = true;
} else {
throw new PSQLException(
GT.tr("Unsupported value for stringtype parameter: {0}", stringType),
PSQLState.INVALID_PARAMETER_VALUE);
}
} else {
bindStringAsVarchar = true;
}
// Initialize timestamp stuff
timestampUtils = new TimestampUtils(!queryExecutor.getIntegerDateTimes(), new Provider() {
@Override
public TimeZone get() {
return queryExecutor.getTimeZone();
}
});
// Initialize common queries.
// isParameterized==true so full parse is performed and the engine knows the query
// is not a compound query with ; inside, so it could use parse/bind/exec messages
commitQuery = createQuery("COMMIT", false, true).query;
rollbackQuery = createQuery("ROLLBACK", false, true).query;
int unknownLength = PGProperty.UNKNOWN_LENGTH.getInt(info);
// Initialize object handling
typeCache = createTypeInfo(this, unknownLength);
initObjectTypes(info);
if (PGProperty.LOG_UNCLOSED_CONNECTIONS.getBoolean(info)) {
openStackTrace = new Throwable("Connection was created at this point:");
}
this.disableColumnSanitiser = PGProperty.DISABLE_COLUMN_SANITISER.getBoolean(info);
if (haveMinimumServerVersion(ServerVersion.v8_3)) {
typeCache.addCoreType("uuid", Oid.UUID, Types.OTHER, "java.util.UUID", Oid.UUID_ARRAY);
typeCache.addCoreType("xml", Oid.XML, Types.SQLXML, "java.sql.SQLXML", Oid.XML_ARRAY);
}
this.clientInfo = new Properties();
if (haveMinimumServerVersion(ServerVersion.v9_0)) {
String appName = PGProperty.APPLICATION_NAME.get(info);
if (appName == null) {
appName = "";
}
this.clientInfo.put("ApplicationName", appName);
}
fieldMetadataCache = new LruCache(
Math.max(0, PGProperty.DATABASE_METADATA_CACHE_FIELDS.getInt(info)),
Math.max(0, PGProperty.DATABASE_METADATA_CACHE_FIELDS_MIB.getInt(info) * 1024 * 1024),
false);
replicationConnection = PGProperty.REPLICATION.get(info) != null;
xmlFactoryFactoryClass = PGProperty.XML_FACTORY_FACTORY.get(info);
}
private static ReadOnlyBehavior getReadOnlyBehavior(String property) {
try {
return ReadOnlyBehavior.valueOf(property);
} catch (IllegalArgumentException e) {
try {
return ReadOnlyBehavior.valueOf(property.toLowerCase(Locale.US));
} catch (IllegalArgumentException e2) {
return ReadOnlyBehavior.transaction;
}
}
}
private static Set getSupportedBinaryOids() {
return new HashSet(Arrays.asList(
Oid.BYTEA,
Oid.INT2,
Oid.INT4,
Oid.INT8,
Oid.FLOAT4,
Oid.FLOAT8,
Oid.TIME,
Oid.DATE,
Oid.TIMETZ,
Oid.TIMESTAMP,
Oid.TIMESTAMPTZ,
Oid.INT2_ARRAY,
Oid.INT4_ARRAY,
Oid.INT8_ARRAY,
Oid.FLOAT4_ARRAY,
Oid.FLOAT8_ARRAY,
Oid.VARCHAR_ARRAY,
Oid.TEXT_ARRAY,
Oid.POINT,
Oid.BOX,
Oid.UUID));
}
private static Set getBinaryOids(Properties info) throws PSQLException {
boolean binaryTransfer = PGProperty.BINARY_TRANSFER.getBoolean(info);
// Formats that currently have binary protocol support
Set binaryOids = new HashSet(32);
if (binaryTransfer) {
binaryOids.addAll(SUPPORTED_BINARY_OIDS);
}
binaryOids.addAll(getOidSet(PGProperty.BINARY_TRANSFER_ENABLE.get(info)));
binaryOids.removeAll(getOidSet(PGProperty.BINARY_TRANSFER_DISABLE.get(info)));
binaryOids.retainAll(SUPPORTED_BINARY_OIDS);
return binaryOids;
}
private static Set getOidSet(String oidList) throws PSQLException {
Set oids = new HashSet();
StringTokenizer tokenizer = new StringTokenizer(oidList, ",");
while (tokenizer.hasMoreTokens()) {
String oid = tokenizer.nextToken();
oids.add(Oid.valueOf(oid));
}
return oids;
}
private String oidsToString(Set oids) {
StringBuilder sb = new StringBuilder();
for (Integer oid : oids) {
sb.append(Oid.toString(oid));
sb.append(',');
}
if (sb.length() > 0) {
sb.setLength(sb.length() - 1);
} else {
sb.append(" ");
}
return sb.toString();
}
private final TimestampUtils timestampUtils;
public TimestampUtils getTimestampUtils() {
return timestampUtils;
}
/**
* The current type mappings.
*/
protected Map> typemap = new HashMap>();
@Override
public Statement createStatement() throws SQLException {
// We now follow the spec and default to TYPE_FORWARD_ONLY.
return createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
}
@Override
public PreparedStatement prepareStatement(String sql) throws SQLException {
return prepareStatement(sql, ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
}
@Override
public CallableStatement prepareCall(String sql) throws SQLException {
return prepareCall(sql, ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
}
@Override
public Map> getTypeMap() throws SQLException {
checkClosed();
return typemap;
}
public QueryExecutor getQueryExecutor() {
return queryExecutor;
}
public ReplicationProtocol getReplicationProtocol() {
return queryExecutor.getReplicationProtocol();
}
/**
* This adds a warning to the warning chain.
*
* @param warn warning to add
*/
public void addWarning(SQLWarning warn) {
// Add the warning to the chain
if (firstWarning != null) {
firstWarning.setNextWarning(warn);
} else {
firstWarning = warn;
}
}
@Override
public ResultSet execSQLQuery(String s) throws SQLException {
return execSQLQuery(s, ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
}
@Override
public ResultSet execSQLQuery(String s, int resultSetType, int resultSetConcurrency)
throws SQLException {
BaseStatement stat = (BaseStatement) createStatement(resultSetType, resultSetConcurrency);
boolean hasResultSet = stat.executeWithFlags(s, QueryExecutor.QUERY_SUPPRESS_BEGIN);
while (!hasResultSet && stat.getUpdateCount() != -1) {
hasResultSet = stat.getMoreResults();
}
if (!hasResultSet) {
throw new PSQLException(GT.tr("No results were returned by the query."), PSQLState.NO_DATA);
}
// Transfer warnings to the connection, since the user never
// has a chance to see the statement itself.
SQLWarning warnings = stat.getWarnings();
if (warnings != null) {
addWarning(warnings);
}
return stat.getResultSet();
}
@Override
public void execSQLUpdate(String s) throws SQLException {
BaseStatement stmt = (BaseStatement) createStatement();
if (stmt.executeWithFlags(s, QueryExecutor.QUERY_NO_METADATA | QueryExecutor.QUERY_NO_RESULTS
| QueryExecutor.QUERY_SUPPRESS_BEGIN)) {
throw new PSQLException(GT.tr("A result was returned when none was expected."),
PSQLState.TOO_MANY_RESULTS);
}
// Transfer warnings to the connection, since the user never
// has a chance to see the statement itself.
SQLWarning warnings = stmt.getWarnings();
if (warnings != null) {
addWarning(warnings);
}
stmt.close();
}
void execSQLUpdate(CachedQuery query) throws SQLException {
BaseStatement stmt = (BaseStatement) createStatement();
if (stmt.executeWithFlags(query, QueryExecutor.QUERY_NO_METADATA | QueryExecutor.QUERY_NO_RESULTS
| QueryExecutor.QUERY_SUPPRESS_BEGIN)) {
throw new PSQLException(GT.tr("A result was returned when none was expected."),
PSQLState.TOO_MANY_RESULTS);
}
// Transfer warnings to the connection, since the user never
// has a chance to see the statement itself.
SQLWarning warnings = stmt.getWarnings();
if (warnings != null) {
addWarning(warnings);
}
stmt.close();
}
/**
* In SQL, a result table can be retrieved through a cursor that is named. The current row of a
* result can be updated or deleted using a positioned update/delete statement that references the
* cursor name.
*
* We do not support positioned update/delete, so this is a no-op.
*
* @param cursor the cursor name
* @throws SQLException if a database access error occurs
*/
public void setCursorName(String cursor) throws SQLException {
checkClosed();
// No-op.
}
/**
* getCursorName gets the cursor name.
*
* @return the current cursor name
* @throws SQLException if a database access error occurs
*/
public String getCursorName() throws SQLException {
checkClosed();
return null;
}
/**
* We are required to bring back certain information by the DatabaseMetaData class. These
* functions do that.
*
* Method getURL() brings back the URL (good job we saved it)
*
* @return the url
* @throws SQLException just in case...
*/
public String getURL() throws SQLException {
return creatingURL;
}
/**
* Method getUserName() brings back the User Name (again, we saved it).
*
* @return the user name
* @throws SQLException just in case...
*/
public String getUserName() throws SQLException {
return queryExecutor.getUser();
}
public Fastpath getFastpathAPI() throws SQLException {
checkClosed();
if (fastpath == null) {
fastpath = new Fastpath(this);
}
return fastpath;
}
// This holds a reference to the Fastpath API if already open
private Fastpath fastpath = null;
public LargeObjectManager getLargeObjectAPI() throws SQLException {
checkClosed();
if (largeobject == null) {
largeobject = new LargeObjectManager(this);
}
return largeobject;
}
// This holds a reference to the LargeObject API if already open
private LargeObjectManager largeobject = null;
/*
* This method is used internally to return an object based around org.postgresql's more unique
* data types.
*
* It uses an internal HashMap to get the handling class. If the type is not supported, then an
* instance of org.postgresql.util.PGobject is returned.
*
* You can use the getValue() or setValue() methods to handle the returned object. Custom objects
* can have their own methods.
*
* @return PGobject for this type, and set to value
*
* @exception SQLException if value is not correct for this type
*/
@Override
public Object getObject(String type, String value, byte[] byteValue) throws SQLException {
if (typemap != null) {
Class c = typemap.get(type);
if (c != null) {
// Handle the type (requires SQLInput & SQLOutput classes to be implemented)
throw new PSQLException(GT.tr("Custom type maps are not supported."),
PSQLState.NOT_IMPLEMENTED);
}
}
PGobject obj = null;
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(Level.FINEST, "Constructing object from type={0} value=<{1}>", new Object[]{type, value});
}
try {
Class klass = typeCache.getPGobject(type);
// If className is not null, then try to instantiate it,
// It must be basetype PGobject
// This is used to implement the org.postgresql unique types (like lseg,
// point, etc).
if (klass != null) {
obj = klass.newInstance();
obj.setType(type);
if (byteValue != null && obj instanceof PGBinaryObject) {
PGBinaryObject binObj = (PGBinaryObject) obj;
binObj.setByteValue(byteValue, 0);
} else {
obj.setValue(value);
}
} else {
// If className is null, then the type is unknown.
// so return a PGobject with the type set, and the value set
obj = new PGobject();
obj.setType(type);
obj.setValue(value);
}
return obj;
} catch (SQLException sx) {
// rethrow the exception. Done because we capture any others next
throw sx;
} catch (Exception ex) {
throw new PSQLException(GT.tr("Failed to create object for: {0}.", type),
PSQLState.CONNECTION_FAILURE, ex);
}
}
protected TypeInfo createTypeInfo(BaseConnection conn, int unknownLength) {
return new TypeInfoCache(conn, unknownLength);
}
public TypeInfo getTypeInfo() {
return typeCache;
}
@Override
public void addDataType(String type, String name) {
try {
addDataType(type, Class.forName(name).asSubclass(PGobject.class));
} catch (Exception e) {
throw new RuntimeException("Cannot register new type: " + e);
}
}
@Override
public void addDataType(String type, Class klass) throws SQLException {
checkClosed();
typeCache.addDataType(type, klass);
}
// This initialises the objectTypes hash map
private void initObjectTypes(Properties info) throws SQLException {
// Add in the types that come packaged with the driver.
// These can be overridden later if desired.
addDataType("box", org.postgresql.geometric.PGbox.class);
addDataType("circle", org.postgresql.geometric.PGcircle.class);
addDataType("line", org.postgresql.geometric.PGline.class);
addDataType("lseg", org.postgresql.geometric.PGlseg.class);
addDataType("path", org.postgresql.geometric.PGpath.class);
addDataType("point", org.postgresql.geometric.PGpoint.class);
addDataType("polygon", org.postgresql.geometric.PGpolygon.class);
addDataType("money", org.postgresql.util.PGmoney.class);
addDataType("interval", org.postgresql.util.PGInterval.class);
Enumeration e = info.propertyNames();
while (e.hasMoreElements()) {
String propertyName = (String) e.nextElement();
if (propertyName.startsWith("datatype.")) {
String typeName = propertyName.substring(9);
String className = info.getProperty(propertyName);
Class klass;
try {
klass = Class.forName(className);
} catch (ClassNotFoundException cnfe) {
throw new PSQLException(
GT.tr("Unable to load the class {0} responsible for the datatype {1}",
className, typeName),
PSQLState.SYSTEM_ERROR, cnfe);
}
addDataType(typeName, klass.asSubclass(PGobject.class));
}
}
}
/**
* Note: even though {@code Statement} is automatically closed when it is garbage
* collected, it is better to close it explicitly to lower resource consumption.
*
* {@inheritDoc}
*/
@Override
public void close() throws SQLException {
if (queryExecutor == null) {
// This might happen in case constructor throws an exception (e.g. host being not available).
// When that happens the connection is still registered in the finalizer queue, so it gets finalized
return;
}
releaseTimer();
queryExecutor.close();
openStackTrace = null;
}
@Override
public String nativeSQL(String sql) throws SQLException {
checkClosed();
CachedQuery cachedQuery = queryExecutor.createQuery(sql, false, true);
return cachedQuery.query.getNativeSql();
}
@Override
public synchronized SQLWarning getWarnings() throws SQLException {
checkClosed();
SQLWarning newWarnings = queryExecutor.getWarnings(); // NB: also clears them.
if (firstWarning == null) {
firstWarning = newWarnings;
} else {
firstWarning.setNextWarning(newWarnings); // Chain them on.
}
return firstWarning;
}
@Override
public synchronized void clearWarnings() throws SQLException {
checkClosed();
queryExecutor.getWarnings(); // Clear and discard.
firstWarning = null;
}
@Override
public void setReadOnly(boolean readOnly) throws SQLException {
checkClosed();
if (queryExecutor.getTransactionState() != TransactionState.IDLE) {
throw new PSQLException(
GT.tr("Cannot change transaction read-only property in the middle of a transaction."),
PSQLState.ACTIVE_SQL_TRANSACTION);
}
if (readOnly != this.readOnly && autoCommit && this.readOnlyBehavior == ReadOnlyBehavior.always) {
execSQLUpdate(readOnly ? setSessionReadOnly : setSessionNotReadOnly);
}
this.readOnly = readOnly;
LOGGER.log(Level.FINE, " setReadOnly = {0}", readOnly);
}
@Override
public boolean isReadOnly() throws SQLException {
checkClosed();
return readOnly;
}
@Override
public boolean hintReadOnly() {
return readOnly && readOnlyBehavior != ReadOnlyBehavior.ignore;
}
@Override
public void setAutoCommit(boolean autoCommit) throws SQLException {
checkClosed();
if (this.autoCommit == autoCommit) {
return;
}
if (!this.autoCommit) {
commit();
}
// if the connection is read only, we need to make sure session settings are
// correct when autocommit status changed
if (this.readOnly && readOnlyBehavior == ReadOnlyBehavior.always) {
// if we are turning on autocommit, we need to set session
// to read only
if (autoCommit) {
this.autoCommit = true;
execSQLUpdate(setSessionReadOnly);
} else {
// if we are turning auto commit off, we need to
// disable session
execSQLUpdate(setSessionNotReadOnly);
}
}
this.autoCommit = autoCommit;
LOGGER.log(Level.FINE, " setAutoCommit = {0}", autoCommit);
}
@Override
public boolean getAutoCommit() throws SQLException {
checkClosed();
return this.autoCommit;
}
private void executeTransactionCommand(Query query) throws SQLException {
int flags = QueryExecutor.QUERY_NO_METADATA | QueryExecutor.QUERY_NO_RESULTS
| QueryExecutor.QUERY_SUPPRESS_BEGIN;
if (prepareThreshold == 0) {
flags |= QueryExecutor.QUERY_ONESHOT;
}
try {
getQueryExecutor().execute(query, null, new TransactionCommandHandler(), 0, 0, flags);
} catch (SQLException e) {
// Don't retry composite queries as it might get partially executed
if (query.getSubqueries() != null || !queryExecutor.willHealOnRetry(e)) {
throw e;
}
query.close();
// retry
getQueryExecutor().execute(query, null, new TransactionCommandHandler(), 0, 0, flags);
}
}
@Override
public void commit() throws SQLException {
checkClosed();
if (autoCommit) {
throw new PSQLException(GT.tr("Cannot commit when autoCommit is enabled."),
PSQLState.NO_ACTIVE_SQL_TRANSACTION);
}
if (queryExecutor.getTransactionState() != TransactionState.IDLE) {
executeTransactionCommand(commitQuery);
}
}
protected void checkClosed() throws SQLException {
if (isClosed()) {
throw new PSQLException(GT.tr("This connection has been closed."),
PSQLState.CONNECTION_DOES_NOT_EXIST);
}
}
@Override
public void rollback() throws SQLException {
checkClosed();
if (autoCommit) {
throw new PSQLException(GT.tr("Cannot rollback when autoCommit is enabled."),
PSQLState.NO_ACTIVE_SQL_TRANSACTION);
}
if (queryExecutor.getTransactionState() != TransactionState.IDLE) {
executeTransactionCommand(rollbackQuery);
} else {
// just log for debugging
LOGGER.log(Level.FINE, "Rollback requested but no transaction in progress");
}
}
public TransactionState getTransactionState() {
return queryExecutor.getTransactionState();
}
public int getTransactionIsolation() throws SQLException {
checkClosed();
String level = null;
final ResultSet rs = execSQLQuery("SHOW TRANSACTION ISOLATION LEVEL"); // nb: no BEGIN triggered
if (rs.next()) {
level = rs.getString(1);
}
rs.close();
// TODO revisit: throw exception instead of silently eating the error in unknown cases?
if (level == null) {
return Connection.TRANSACTION_READ_COMMITTED; // Best guess.
}
level = level.toUpperCase(Locale.US);
if (level.equals("READ COMMITTED")) {
return Connection.TRANSACTION_READ_COMMITTED;
}
if (level.equals("READ UNCOMMITTED")) {
return Connection.TRANSACTION_READ_UNCOMMITTED;
}
if (level.equals("REPEATABLE READ")) {
return Connection.TRANSACTION_REPEATABLE_READ;
}
if (level.equals("SERIALIZABLE")) {
return Connection.TRANSACTION_SERIALIZABLE;
}
return Connection.TRANSACTION_READ_COMMITTED; // Best guess.
}
public void setTransactionIsolation(int level) throws SQLException {
checkClosed();
if (queryExecutor.getTransactionState() != TransactionState.IDLE) {
throw new PSQLException(
GT.tr("Cannot change transaction isolation level in the middle of a transaction."),
PSQLState.ACTIVE_SQL_TRANSACTION);
}
String isolationLevelName = getIsolationLevelName(level);
if (isolationLevelName == null) {
throw new PSQLException(GT.tr("Transaction isolation level {0} not supported.", level),
PSQLState.NOT_IMPLEMENTED);
}
String isolationLevelSQL =
"SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL " + isolationLevelName;
execSQLUpdate(isolationLevelSQL); // nb: no BEGIN triggered
LOGGER.log(Level.FINE, " setTransactionIsolation = {0}", isolationLevelName);
}
protected String getIsolationLevelName(int level) {
switch (level) {
case Connection.TRANSACTION_READ_COMMITTED:
return "READ COMMITTED";
case Connection.TRANSACTION_SERIALIZABLE:
return "SERIALIZABLE";
case Connection.TRANSACTION_READ_UNCOMMITTED:
return "READ UNCOMMITTED";
case Connection.TRANSACTION_REPEATABLE_READ:
return "REPEATABLE READ";
default:
return null;
}
}
public void setCatalog(String catalog) throws SQLException {
checkClosed();
// no-op
}
public String getCatalog() throws SQLException {
checkClosed();
return queryExecutor.getDatabase();
}
public boolean getHideUnprivilegedObjects() {
return hideUnprivilegedObjects;
}
/**
*
Overrides finalize(). If called, it closes the connection.
*
* This was done at the request of Rachel
* Greenham who hit a problem where multiple clients didn't close the connection, and once a
* fortnight enough clients were open to kill the postgres server.
*/
protected void finalize() throws Throwable {
try {
if (openStackTrace != null) {
LOGGER.log(Level.WARNING, GT.tr("Finalizing a Connection that was never closed:"), openStackTrace);
}
close();
} finally {
super.finalize();
}
}
/**
* Get server version number.
*
* @return server version number
*/
public String getDBVersionNumber() {
return queryExecutor.getServerVersion();
}
/**
* Get server major version.
*
* @return server major version
*/
public int getServerMajorVersion() {
try {
StringTokenizer versionTokens = new StringTokenizer(queryExecutor.getServerVersion(), "."); // aaXbb.ccYdd
return integerPart(versionTokens.nextToken()); // return X
} catch (NoSuchElementException e) {
return 0;
}
}
/**
* Get server minor version.
*
* @return server minor version
*/
public int getServerMinorVersion() {
try {
StringTokenizer versionTokens = new StringTokenizer(queryExecutor.getServerVersion(), "."); // aaXbb.ccYdd
versionTokens.nextToken(); // Skip aaXbb
return integerPart(versionTokens.nextToken()); // return Y
} catch (NoSuchElementException e) {
return 0;
}
}
@Override
public boolean haveMinimumServerVersion(int ver) {
return queryExecutor.getServerVersionNum() >= ver;
}
@Override
public boolean haveMinimumServerVersion(Version ver) {
return haveMinimumServerVersion(ver.getVersionNum());
}
@Override
public Encoding getEncoding() {
return queryExecutor.getEncoding();
}
@Override
public byte[] encodeString(String str) throws SQLException {
try {
return getEncoding().encode(str);
} catch (IOException ioe) {
throw new PSQLException(GT.tr("Unable to translate data into the desired encoding."),
PSQLState.DATA_ERROR, ioe);
}
}
@Override
public String escapeString(String str) throws SQLException {
return Utils.escapeLiteral(null, str, queryExecutor.getStandardConformingStrings())
.toString();
}
@Override
public boolean getStandardConformingStrings() {
return queryExecutor.getStandardConformingStrings();
}
// This is a cache of the DatabaseMetaData instance for this connection
protected java.sql.DatabaseMetaData metadata;
@Override
public boolean isClosed() throws SQLException {
return queryExecutor.isClosed();
}
@Override
public void cancelQuery() throws SQLException {
checkClosed();
queryExecutor.sendQueryCancel();
}
@Override
public PGNotification[] getNotifications() throws SQLException {
return getNotifications(-1);
}
@Override
public PGNotification[] getNotifications(int timeoutMillis) throws SQLException {
checkClosed();
getQueryExecutor().processNotifies(timeoutMillis);
// Backwards-compatibility hand-holding.
PGNotification[] notifications = queryExecutor.getNotifications();
return (notifications.length == 0 ? null : notifications);
}
/**
* Handler for transaction queries.
*/
private class TransactionCommandHandler extends ResultHandlerBase {
public void handleCompletion() throws SQLException {
SQLWarning warning = getWarning();
if (warning != null) {
PgConnection.this.addWarning(warning);
}
super.handleCompletion();
}
}
public int getPrepareThreshold() {
return prepareThreshold;
}
public void setDefaultFetchSize(int fetchSize) throws SQLException {
if (fetchSize < 0) {
throw new PSQLException(GT.tr("Fetch size must be a value greater to or equal to 0."),
PSQLState.INVALID_PARAMETER_VALUE);
}
this.defaultFetchSize = fetchSize;
LOGGER.log(Level.FINE, " setDefaultFetchSize = {0}", fetchSize);
}
public int getDefaultFetchSize() {
return defaultFetchSize;
}
public void setPrepareThreshold(int newThreshold) {
this.prepareThreshold = newThreshold;
LOGGER.log(Level.FINE, " setPrepareThreshold = {0}", newThreshold);
}
public boolean getForceBinary() {
return forcebinary;
}
public void setForceBinary(boolean newValue) {
this.forcebinary = newValue;
LOGGER.log(Level.FINE, " setForceBinary = {0}", newValue);
}
public void setTypeMapImpl(Map> map) throws SQLException {
typemap = map;
}
public Logger getLogger() {
return LOGGER;
}
public int getProtocolVersion() {
return queryExecutor.getProtocolVersion();
}
public boolean getStringVarcharFlag() {
return bindStringAsVarchar;
}
private CopyManager copyManager = null;
public CopyManager getCopyAPI() throws SQLException {
checkClosed();
if (copyManager == null) {
copyManager = new CopyManager(this);
}
return copyManager;
}
public boolean binaryTransferSend(int oid) {
return queryExecutor.useBinaryForSend(oid);
}
public int getBackendPID() {
return queryExecutor.getBackendPID();
}
public boolean isColumnSanitiserDisabled() {
return this.disableColumnSanitiser;
}
public void setDisableColumnSanitiser(boolean disableColumnSanitiser) {
this.disableColumnSanitiser = disableColumnSanitiser;
LOGGER.log(Level.FINE, " setDisableColumnSanitiser = {0}", disableColumnSanitiser);
}
@Override
public PreferQueryMode getPreferQueryMode() {
return queryExecutor.getPreferQueryMode();
}
@Override
public AutoSave getAutosave() {
return queryExecutor.getAutoSave();
}
@Override
public void setAutosave(AutoSave autoSave) {
queryExecutor.setAutoSave(autoSave);
LOGGER.log(Level.FINE, " setAutosave = {0}", autoSave.value());
}
protected void abort() {
queryExecutor.abort();
}
private synchronized Timer getTimer() {
if (cancelTimer == null) {
cancelTimer = Driver.getSharedTimer().getTimer();
}
return cancelTimer;
}
private synchronized void releaseTimer() {
if (cancelTimer != null) {
cancelTimer = null;
Driver.getSharedTimer().releaseTimer();
}
}
@Override
public void addTimerTask(TimerTask timerTask, long milliSeconds) {
Timer timer = getTimer();
timer.schedule(timerTask, milliSeconds);
}
@Override
public void purgeTimerTasks() {
Timer timer = cancelTimer;
if (timer != null) {
timer.purge();
}
}
@Override
public String escapeIdentifier(String identifier) throws SQLException {
return Utils.escapeIdentifier(null, identifier).toString();
}
@Override
public String escapeLiteral(String literal) throws SQLException {
return Utils.escapeLiteral(null, literal, queryExecutor.getStandardConformingStrings())
.toString();
}
@Override
public LruCache getFieldMetadataCache() {
return fieldMetadataCache;
}
@Override
public PGReplicationConnection getReplicationAPI() {
return new PGReplicationConnectionImpl(this);
}
private static void appendArray(StringBuilder sb, Object elements, char delim) {
sb.append('{');
int nElements = java.lang.reflect.Array.getLength(elements);
for (int i = 0; i < nElements; i++) {
if (i > 0) {
sb.append(delim);
}
Object o = java.lang.reflect.Array.get(elements, i);
if (o == null) {
sb.append("NULL");
} else if (o.getClass().isArray()) {
final PrimitiveArraySupport arraySupport = PrimitiveArraySupport.getArraySupport(o);
if (arraySupport != null) {
arraySupport.appendArray(sb, delim, o);
} else {
appendArray(sb, o, delim);
}
} else {
String s = o.toString();
PgArray.escapeArrayElement(sb, s);
}
}
sb.append('}');
}
// Parse a "dirty" integer surrounded by non-numeric characters
private static int integerPart(String dirtyString) {
int start = 0;
while (start < dirtyString.length() && !Character.isDigit(dirtyString.charAt(start))) {
++start;
}
int end = start;
while (end < dirtyString.length() && Character.isDigit(dirtyString.charAt(end))) {
++end;
}
if (start == end) {
return 0;
}
return Integer.parseInt(dirtyString.substring(start, end));
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency,
int resultSetHoldability) throws SQLException {
checkClosed();
return new PgStatement(this, resultSetType, resultSetConcurrency, resultSetHoldability);
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency,
int resultSetHoldability) throws SQLException {
checkClosed();
return new PgPreparedStatement(this, sql, resultSetType, resultSetConcurrency,
resultSetHoldability);
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency,
int resultSetHoldability) throws SQLException {
checkClosed();
return new PgCallableStatement(this, sql, resultSetType, resultSetConcurrency,
resultSetHoldability);
}
@Override
public DatabaseMetaData getMetaData() throws SQLException {
checkClosed();
if (metadata == null) {
metadata = new PgDatabaseMetaData(this);
}
return metadata;
}
@Override
public void setTypeMap(Map> map) throws SQLException {
setTypeMapImpl(map);
LOGGER.log(Level.FINE, " setTypeMap = {0}", map);
}
protected Array makeArray(int oid, String fieldString) throws SQLException {
return new PgArray(this, oid, fieldString);
}
protected Blob makeBlob(long oid) throws SQLException {
return new PgBlob(this, oid);
}
protected Clob makeClob(long oid) throws SQLException {
return new PgClob(this, oid);
}
protected SQLXML makeSQLXML() throws SQLException {
return new PgSQLXML(this);
}
@Override
public Clob createClob() throws SQLException {
checkClosed();
throw org.postgresql.Driver.notImplemented(this.getClass(), "createClob()");
}
@Override
public Blob createBlob() throws SQLException {
checkClosed();
throw org.postgresql.Driver.notImplemented(this.getClass(), "createBlob()");
}
@Override
public NClob createNClob() throws SQLException {
checkClosed();
throw org.postgresql.Driver.notImplemented(this.getClass(), "createNClob()");
}
@Override
public SQLXML createSQLXML() throws SQLException {
checkClosed();
return makeSQLXML();
}
@Override
public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
checkClosed();
throw org.postgresql.Driver.notImplemented(this.getClass(), "createStruct(String, Object[])");
}
@Override
public Array createArrayOf(String typeName, Object elements) throws SQLException {
checkClosed();
final TypeInfo typeInfo = getTypeInfo();
final int oid = typeInfo.getPGArrayType(typeName);
final char delim = typeInfo.getArrayDelimiter(oid);
if (oid == Oid.UNSPECIFIED) {
throw new PSQLException(GT.tr("Unable to find server array type for provided name {0}.", typeName),
PSQLState.INVALID_NAME);
}
if (elements == null) {
return makeArray(oid, null);
}
final String arrayString;
final PrimitiveArraySupport arraySupport = PrimitiveArraySupport.getArraySupport(elements);
if (arraySupport != null) {
// if the oid for the given type matches the default type, we might be
// able to go straight to binary representation
if (oid == arraySupport.getDefaultArrayTypeOid(typeInfo) && arraySupport.supportBinaryRepresentation()
&& getPreferQueryMode() != PreferQueryMode.SIMPLE) {
return new PgArray(this, oid, arraySupport.toBinaryRepresentation(this, elements));
}
arrayString = arraySupport.toArrayString(delim, elements);
} else {
final Class clazz = elements.getClass();
if (!clazz.isArray()) {
throw new PSQLException(GT.tr("Invalid elements {0}", elements), PSQLState.INVALID_PARAMETER_TYPE);
}
StringBuilder sb = new StringBuilder();
appendArray(sb, elements, delim);
arrayString = sb.toString();
}
return makeArray(oid, arrayString);
}
@Override
public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
checkClosed();
int oid = getTypeInfo().getPGArrayType(typeName);
if (oid == Oid.UNSPECIFIED) {
throw new PSQLException(
GT.tr("Unable to find server array type for provided name {0}.", typeName),
PSQLState.INVALID_NAME);
}
if (elements == null) {
return makeArray(oid, null);
}
char delim = getTypeInfo().getArrayDelimiter(oid);
StringBuilder sb = new StringBuilder();
appendArray(sb, elements, delim);
return makeArray(oid, sb.toString());
}
@Override
public boolean isValid(int timeout) throws SQLException {
if (timeout < 0) {
throw new PSQLException(GT.tr("Invalid timeout ({0}<0).", timeout),
PSQLState.INVALID_PARAMETER_VALUE);
}
if (isClosed()) {
return false;
}
try {
int savedNetworkTimeOut = getNetworkTimeout();
try {
setNetworkTimeout(null, timeout * 1000);
if (replicationConnection) {
Statement statement = createStatement();
statement.execute("IDENTIFY_SYSTEM");
statement.close();
} else {
if (checkConnectionQuery == null) {
checkConnectionQuery = prepareStatement("");
}
checkConnectionQuery.setQueryTimeout(timeout);
checkConnectionQuery.executeUpdate();
}
return true;
} finally {
setNetworkTimeout(null, savedNetworkTimeOut);
}
} catch (SQLException e) {
if (PSQLState.IN_FAILED_SQL_TRANSACTION.getState().equals(e.getSQLState())) {
// "current transaction aborted", assume the connection is up and running
return true;
}
LOGGER.log(Level.FINE, GT.tr("Validating connection."), e);
}
return false;
}
@Override
public void setClientInfo(String name, String value) throws SQLClientInfoException {
try {
checkClosed();
} catch (final SQLException cause) {
Map failures = new HashMap();
failures.put(name, ClientInfoStatus.REASON_UNKNOWN);
throw new SQLClientInfoException(GT.tr("This connection has been closed."), failures, cause);
}
if (haveMinimumServerVersion(ServerVersion.v9_0) && "ApplicationName".equals(name)) {
if (value == null) {
value = "";
}
final String oldValue = queryExecutor.getApplicationName();
if (value.equals(oldValue)) {
return;
}
try {
StringBuilder sql = new StringBuilder("SET application_name = '");
Utils.escapeLiteral(sql, value, getStandardConformingStrings());
sql.append("'");
execSQLUpdate(sql.toString());
} catch (SQLException sqle) {
Map failures = new HashMap();
failures.put(name, ClientInfoStatus.REASON_UNKNOWN);
throw new SQLClientInfoException(
GT.tr("Failed to set ClientInfo property: {0}", "ApplicationName"), sqle.getSQLState(),
failures, sqle);
}
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, " setClientInfo = {0} {1}", new Object[]{name, value});
}
clientInfo.put(name, value);
return;
}
addWarning(new SQLWarning(GT.tr("ClientInfo property not supported."),
PSQLState.NOT_IMPLEMENTED.getState()));
}
@Override
public void setClientInfo(Properties properties) throws SQLClientInfoException {
try {
checkClosed();
} catch (final SQLException cause) {
Map failures = new HashMap();
for (Map.Entry e : properties.entrySet()) {
failures.put((String) e.getKey(), ClientInfoStatus.REASON_UNKNOWN);
}
throw new SQLClientInfoException(GT.tr("This connection has been closed."), failures, cause);
}
Map failures = new HashMap();
for (String name : new String[]{"ApplicationName"}) {
try {
setClientInfo(name, properties.getProperty(name, null));
} catch (SQLClientInfoException e) {
failures.putAll(e.getFailedProperties());
}
}
if (!failures.isEmpty()) {
throw new SQLClientInfoException(GT.tr("One or more ClientInfo failed."),
PSQLState.NOT_IMPLEMENTED.getState(), failures);
}
}
@Override
public String getClientInfo(String name) throws SQLException {
checkClosed();
clientInfo.put("ApplicationName", queryExecutor.getApplicationName());
return clientInfo.getProperty(name);
}
@Override
public Properties getClientInfo() throws SQLException {
checkClosed();
clientInfo.put("ApplicationName", queryExecutor.getApplicationName());
return clientInfo;
}
public T createQueryObject(Class ifc) throws SQLException {
checkClosed();
throw org.postgresql.Driver.notImplemented(this.getClass(), "createQueryObject(Class)");
}
@Override
public boolean isWrapperFor(Class iface) throws SQLException {
checkClosed();
return iface.isAssignableFrom(getClass());
}
@Override
public T unwrap(Class iface) throws SQLException {
checkClosed();
if (iface.isAssignableFrom(getClass())) {
return iface.cast(this);
}
throw new SQLException("Cannot unwrap to " + iface.getName());
}
public String getSchema() throws SQLException {
checkClosed();
Statement stmt = createStatement();
try {
ResultSet rs = stmt.executeQuery("select current_schema()");
try {
if (!rs.next()) {
return null; // Is it ever possible?
}
return rs.getString(1);
} finally {
rs.close();
}
} finally {
stmt.close();
}
}
public void setSchema(String schema) throws SQLException {
checkClosed();
Statement stmt = createStatement();
try {
if (schema == null) {
stmt.executeUpdate("SET SESSION search_path TO DEFAULT");
} else {
StringBuilder sb = new StringBuilder();
sb.append("SET SESSION search_path TO '");
Utils.escapeLiteral(sb, schema, getStandardConformingStrings());
sb.append("'");
stmt.executeUpdate(sb.toString());
LOGGER.log(Level.FINE, " setSchema = {0}", schema);
}
} finally {
stmt.close();
}
}
public class AbortCommand implements Runnable {
public void run() {
abort();
}
}
public void abort(Executor executor) throws SQLException {
if (executor == null) {
throw new SQLException("executor is null");
}
if (isClosed()) {
return;
}
SQL_PERMISSION_ABORT.checkGuard(this);
AbortCommand command = new AbortCommand();
executor.execute(command);
}
public void setNetworkTimeout(Executor executor /*not used*/, int milliseconds) throws SQLException {
checkClosed();
if (milliseconds < 0) {
throw new PSQLException(GT.tr("Network timeout must be a value greater than or equal to 0."),
PSQLState.INVALID_PARAMETER_VALUE);
}
SecurityManager securityManager = System.getSecurityManager();
if (securityManager != null) {
securityManager.checkPermission(SQL_PERMISSION_NETWORK_TIMEOUT);
}
try {
queryExecutor.setNetworkTimeout(milliseconds);
} catch (IOException ioe) {
throw new PSQLException(GT.tr("Unable to set network timeout."),
PSQLState.COMMUNICATION_ERROR, ioe);
}
}
public int getNetworkTimeout() throws SQLException {
checkClosed();
try {
return queryExecutor.getNetworkTimeout();
} catch (IOException ioe) {
throw new PSQLException(GT.tr("Unable to get network timeout."),
PSQLState.COMMUNICATION_ERROR, ioe);
}
}
@Override
public void setHoldability(int holdability) throws SQLException {
checkClosed();
switch (holdability) {
case ResultSet.CLOSE_CURSORS_AT_COMMIT:
rsHoldability = holdability;
break;
case ResultSet.HOLD_CURSORS_OVER_COMMIT:
rsHoldability = holdability;
break;
default:
throw new PSQLException(GT.tr("Unknown ResultSet holdability setting: {0}.", holdability),
PSQLState.INVALID_PARAMETER_VALUE);
}
LOGGER.log(Level.FINE, " setHoldability = {0}", holdability);
}
@Override
public int getHoldability() throws SQLException {
checkClosed();
return rsHoldability;
}
@Override
public Savepoint setSavepoint() throws SQLException {
checkClosed();
String pgName;
if (getAutoCommit()) {
throw new PSQLException(GT.tr("Cannot establish a savepoint in auto-commit mode."),
PSQLState.NO_ACTIVE_SQL_TRANSACTION);
}
PSQLSavepoint savepoint = new PSQLSavepoint(savepointId++);
pgName = savepoint.getPGName();
// Note we can't use execSQLUpdate because we don't want
// to suppress BEGIN.
Statement stmt = createStatement();
stmt.executeUpdate("SAVEPOINT " + pgName);
stmt.close();
return savepoint;
}
@Override
public Savepoint setSavepoint(String name) throws SQLException {
checkClosed();
if (getAutoCommit()) {
throw new PSQLException(GT.tr("Cannot establish a savepoint in auto-commit mode."),
PSQLState.NO_ACTIVE_SQL_TRANSACTION);
}
PSQLSavepoint savepoint = new PSQLSavepoint(name);
// Note we can't use execSQLUpdate because we don't want
// to suppress BEGIN.
Statement stmt = createStatement();
stmt.executeUpdate("SAVEPOINT " + savepoint.getPGName());
stmt.close();
return savepoint;
}
@Override
public void rollback(Savepoint savepoint) throws SQLException {
checkClosed();
PSQLSavepoint pgSavepoint = (PSQLSavepoint) savepoint;
execSQLUpdate("ROLLBACK TO SAVEPOINT " + pgSavepoint.getPGName());
}
@Override
public void releaseSavepoint(Savepoint savepoint) throws SQLException {
checkClosed();
PSQLSavepoint pgSavepoint = (PSQLSavepoint) savepoint;
execSQLUpdate("RELEASE SAVEPOINT " + pgSavepoint.getPGName());
pgSavepoint.invalidate();
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency)
throws SQLException {
checkClosed();
return createStatement(resultSetType, resultSetConcurrency, getHoldability());
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency)
throws SQLException {
checkClosed();
return prepareStatement(sql, resultSetType, resultSetConcurrency, getHoldability());
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency)
throws SQLException {
checkClosed();
return prepareCall(sql, resultSetType, resultSetConcurrency, getHoldability());
}
@Override
public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
if (autoGeneratedKeys != Statement.RETURN_GENERATED_KEYS) {
return prepareStatement(sql);
}
return prepareStatement(sql, (String[]) null);
}
@Override
public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
if (columnIndexes != null && columnIndexes.length == 0) {
return prepareStatement(sql);
}
checkClosed();
throw new PSQLException(GT.tr("Returning autogenerated keys is not supported."),
PSQLState.NOT_IMPLEMENTED);
}
@Override
public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
if (columnNames != null && columnNames.length == 0) {
return prepareStatement(sql);
}
CachedQuery cachedQuery = borrowReturningQuery(sql, columnNames);
PgPreparedStatement ps =
new PgPreparedStatement(this, cachedQuery,
ResultSet.TYPE_FORWARD_ONLY,
ResultSet.CONCUR_READ_ONLY,
getHoldability());
Query query = cachedQuery.query;
SqlCommand sqlCommand = query.getSqlCommand();
if (sqlCommand != null) {
ps.wantsGeneratedKeysAlways = sqlCommand.isReturningKeywordPresent();
} else {
// If composite query is given, just ignore "generated keys" arguments
}
return ps;
}
@Override
public final Map getParameterStatuses() {
return queryExecutor.getParameterStatuses();
}
@Override
public final String getParameterStatus(String parameterName) {
return queryExecutor.getParameterStatus(parameterName);
}
@Override
public PGXmlFactoryFactory getXmlFactoryFactory() throws SQLException {
if (xmlFactoryFactory == null) {
if (xmlFactoryFactoryClass == null || xmlFactoryFactoryClass.equals("")) {
xmlFactoryFactory = DefaultPGXmlFactoryFactory.INSTANCE;
} else if (xmlFactoryFactoryClass.equals("LEGACY_INSECURE")) {
xmlFactoryFactory = LegacyInsecurePGXmlFactoryFactory.INSTANCE;
} else {
Class clazz;
try {
clazz = Class.forName(xmlFactoryFactoryClass);
} catch (ClassNotFoundException ex) {
throw new PSQLException(
GT.tr("Could not instantiate xmlFactoryFactory: {0}", xmlFactoryFactoryClass),
PSQLState.INVALID_PARAMETER_VALUE, ex);
}
if (!clazz.isAssignableFrom(PGXmlFactoryFactory.class)) {
throw new PSQLException(
GT.tr("Connection property xmlFactoryFactory must implement PGXmlFactoryFactory: {0}", xmlFactoryFactoryClass),
PSQLState.INVALID_PARAMETER_VALUE);
}
try {
xmlFactoryFactory = (PGXmlFactoryFactory) clazz.newInstance();
} catch (Exception ex) {
throw new PSQLException(
GT.tr("Could not instantiate xmlFactoryFactory: {0}", xmlFactoryFactoryClass),
PSQLState.INVALID_PARAMETER_VALUE, ex);
}
}
}
return xmlFactoryFactory;
}
}