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StatementImpl.java
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StatementImpl.java
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/*
* Copyright OpenSearch Contributors
* SPDX-License-Identifier: Apache-2.0
*/
package org.opensearch.jdbc;
import org.opensearch.jdbc.internal.exceptions.ObjectClosedException;
import org.opensearch.jdbc.logging.LoggingSource;
import org.opensearch.jdbc.logging.Logger;
import org.opensearch.jdbc.protocol.JdbcQueryRequest;
import org.opensearch.jdbc.internal.JdbcWrapper;
import org.opensearch.jdbc.protocol.exceptions.InternalServerErrorException;
import org.opensearch.jdbc.protocol.QueryResponse;
import org.opensearch.jdbc.protocol.exceptions.ResponseException;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.sql.SQLNonTransientException;
import java.sql.SQLWarning;
import java.sql.Statement;
public class StatementImpl implements Statement, JdbcWrapper, LoggingSource {
protected ConnectionImpl connection;
protected boolean open = false;
protected int fetchSize;
protected ResultSetImpl resultSet;
protected Logger log;
private boolean closeOnCompletion;
public StatementImpl(ConnectionImpl connection, Logger log) {
this.connection = connection;
this.open = true;
this.fetchSize = connection.getFetchSize();
this.log = log;
}
@Override
public ResultSet executeQuery(String sql) throws SQLException {
log.debug(()-> logEntry("executeQuery (%s)", sql));
ResultSet rs = executeQueryX(sql, fetchSize);
log.debug(()-> logExit("executeQuery", rs));
return rs;
}
protected ResultSet executeQueryX(String sql, int fetchSize) throws SQLException {
JdbcQueryRequest jdbcQueryRequest = new JdbcQueryRequest(sql, fetchSize);
return executeQueryRequest(jdbcQueryRequest);
}
protected ResultSet executeQueryRequest(JdbcQueryRequest jdbcQueryRequest) throws SQLException {
// JDBC Spec: A ResultSet object is automatically closed when the Statement
// object that generated it is closed, re-executed, or used to retrieve the
// next result from a sequence of multiple results.
closeResultSet(false);
try {
QueryResponse queryResponse = connection.getProtocol().execute(jdbcQueryRequest);
if (queryResponse.getError() != null) {
throw new InternalServerErrorException(
queryResponse.getError().getReason(),
queryResponse.getError().getType(),
queryResponse.getError().getDetails());
}
resultSet = buildResultSet(queryResponse);
} catch (ResponseException | IOException ex) {
logAndThrowSQLException(log, new SQLException("Error executing query", ex));
}
return resultSet;
}
protected ResultSetImpl buildResultSet(QueryResponse queryResponse) throws SQLException {
return new ResultSetImpl(this, queryResponse, log);
}
@Override
public int executeUpdate(String sql) throws SQLException {
checkOpen();
throw new SQLFeatureNotSupportedException("Updates are not supported.");
}
@Override
public void close() throws SQLException {
log.debug(()->logEntry("close ()"));
open = false;
log.debug(()->logExit("close"));
}
private void closeX() throws SQLException {
open = false;
}
@Override
public int getMaxFieldSize() throws SQLException {
return 0;
}
@Override
public void setMaxFieldSize(int max) throws SQLException {
}
@Override
public int getMaxRows() throws SQLException {
return 0;
}
@Override
public void setMaxRows(int max) throws SQLException {
}
@Override
public void setEscapeProcessing(boolean enable) throws SQLException {
checkOpen();
}
@Override
public int getQueryTimeout() throws SQLException {
return 0;
}
@Override
public void setQueryTimeout(int seconds) throws SQLException {
// no-op
}
@Override
public void cancel() throws SQLException {
throw new SQLFeatureNotSupportedException("cancel not supported");
}
@Override
public SQLWarning getWarnings() throws SQLException {
return null;
}
@Override
public void clearWarnings() throws SQLException {
}
@Override
public void setCursorName(String name) throws SQLException {
checkOpen();
// no-op
}
@Override
public boolean execute(String sql) throws SQLException {
log.debug(()->logEntry("execute (%s)", sql));
checkOpen();
executeQueryX(sql, fetchSize);
log.debug(() -> logExit("execute", true));
return true;
}
@Override
public ResultSet getResultSet() throws SQLException {
log.debug(() -> logEntry("getResultSet ()"));
checkOpen();
log.debug(() -> logExit("getResultSet", resultSet));
return resultSet;
}
@Override
public int getUpdateCount() throws SQLException {
checkOpen();
return -1;
}
@Override
public boolean getMoreResults() throws SQLException {
checkOpen();
closeResultSet(true);
return false;
}
@Override
public void setFetchDirection(int direction) throws SQLException {
}
@Override
public int getFetchDirection() throws SQLException {
return 0;
}
@Override
public void setFetchSize(int rows) throws SQLException {
fetchSize = rows;
}
@Override
public int getFetchSize() throws SQLException {
return fetchSize;
}
@Override
public int getResultSetConcurrency() throws SQLException {
return ResultSet.CONCUR_READ_ONLY;
}
@Override
public int getResultSetType() throws SQLException {
return ResultSet.TYPE_FORWARD_ONLY;
}
@Override
public void addBatch(String sql) throws SQLException {
throw new SQLFeatureNotSupportedException("Batch execution is not supported");
}
@Override
public void clearBatch() throws SQLException {
throw new SQLFeatureNotSupportedException("Batch execution is not supported");
}
@Override
public int[] executeBatch() throws SQLException {
throw new SQLFeatureNotSupportedException("Batch execution is not supported");
}
@Override
public Connection getConnection() throws SQLException {
return connection;
}
@Override
public boolean getMoreResults(int current) throws SQLException {
return false;
}
@Override
public ResultSet getGeneratedKeys() throws SQLException {
return null;
}
@Override
public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
throw updatesNotSupportedException();
}
@Override
public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
throw updatesNotSupportedException();
}
@Override
public int executeUpdate(String sql, String[] columnNames) throws SQLException {
throw updatesNotSupportedException();
}
@Override
public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
log.debug(()->logEntry("execute (%s, %d)", sql, autoGeneratedKeys));
checkOpen();
if (autoGeneratedKeys != Statement.NO_GENERATED_KEYS) {
throw new SQLNonTransientException("Auto generated keys are not supported");
}
executeQueryX(sql, fetchSize);
log.debug(() -> logExit("execute", true));
return true;
}
@Override
public boolean execute(String sql, int[] columnIndexes) throws SQLException {
throw new SQLNonTransientException("Auto generated keys are not supported");
}
@Override
public boolean execute(String sql, String[] columnNames) throws SQLException {
throw new SQLNonTransientException("Auto generated keys are not supported");
}
@Override
public int getResultSetHoldability() throws SQLException {
return ResultSet.HOLD_CURSORS_OVER_COMMIT;
}
@Override
public boolean isClosed() throws SQLException {
return isClosedX();
}
protected boolean isClosedX() throws SQLException {
return !open;
}
@Override
public void setPoolable(boolean poolable) throws SQLException {
checkOpen();
// no-op
}
@Override
public boolean isPoolable() throws SQLException {
return false;
}
@Override
public void closeOnCompletion() throws SQLException {
closeOnCompletion = true;
}
@Override
public boolean isCloseOnCompletion() throws SQLException {
return closeOnCompletion;
}
protected void checkOpen() throws SQLException {
if (isClosedX()) {
throw new ObjectClosedException("Statement closed.");
}
}
protected void closeResultSet(boolean closeStatement) throws SQLException {
if (resultSet != null) {
resultSet.closeX(closeStatement);
}
}
void resultSetClosed(ResultSet rs, boolean closeStatement) throws SQLException {
if (closeOnCompletion && closeStatement) {
log.debug(() -> logMessage("Child ResultSet closed and closeOnCompletion is enabled. Closing statement."));
closeX();
}
}
private SQLException updatesNotSupportedException() {
return new SQLFeatureNotSupportedException("Updates are not supported");
}
}