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PostgreSQL JDBC - NG - Driver
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/**
* Copyright (c) 2013, impossibl.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of impossibl.com nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.impossibl.postgres.jdbc;
import com.impossibl.postgres.protocol.ResultBatch;
import com.impossibl.postgres.protocol.ResultBatches;
import static com.impossibl.postgres.jdbc.Exceptions.INVALID_COMMAND_FOR_GENERATED_KEYS;
import static com.impossibl.postgres.jdbc.Exceptions.NOT_SUPPORTED;
import static com.impossibl.postgres.jdbc.Exceptions.NO_RESULT_COUNT_AVAILABLE;
import static com.impossibl.postgres.jdbc.Exceptions.NO_RESULT_SET_AVAILABLE;
import static com.impossibl.postgres.jdbc.SQLTextUtils.appendReturningClause;
import static com.impossibl.postgres.jdbc.SQLTextUtils.prependCursorDeclaration;
import java.sql.BatchUpdateException;
import java.sql.ResultSet;
import java.sql.SQLException;
import static java.lang.Long.max;
import static java.lang.Long.min;
import static java.util.Arrays.asList;
class PGSimpleStatement extends PGStatement {
private SQLText batchCommands;
PGSimpleStatement(PGDirectConnection connection, int type, int concurrency, int holdability) {
super(connection, type, concurrency, holdability, null, null);
}
private void setup(SQLText sqlText) {
if (sqlText.getStatementCount() > 1) {
return;
}
if (resultSetConcurrency != ResultSet.CONCUR_READ_ONLY) {
name = connection.getNextStatementName();
cursorName = "cursor" + name;
if (!prependCursorDeclaration(sqlText, cursorName, resultSetType, resultSetHoldability, connection.autoCommit)) {
cursorName = name = null;
}
}
}
boolean execute(SQLText sqlText) throws SQLException {
if (name != null) {
dispose(connection, name);
name = null;
}
if (processEscapes) {
SQLTextEscapes.processEscapes(sqlText, connection);
}
setup(sqlText);
boolean result = executeDirect(sqlText.toString());
if (cursorName != null) {
result = executeDirect("FETCH ABSOLUTE 0 FROM " + cursorName);
}
return result;
}
@Override
public boolean execute(String sql) throws SQLException {
checkClosed();
SQLText sqlText = connection.parseSQL(sql);
return execute(sqlText);
}
@Override
public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
checkClosed();
SQLText sqlText = connection.parseSQL(sql);
if (autoGeneratedKeys != RETURN_GENERATED_KEYS) {
return execute(sqlText);
}
if (!appendReturningClause(sqlText)) {
throw INVALID_COMMAND_FOR_GENERATED_KEYS;
}
execute(sqlText);
generatedKeysResultSet = getResultSet();
return false;
}
@Override
public boolean execute(String sql, int[] columnIndexes) throws SQLException {
checkClosed();
throw NOT_SUPPORTED;
}
@Override
public boolean execute(String sql, String[] columnNames) throws SQLException {
checkClosed();
SQLText sqlText = connection.parseSQL(sql);
if (!appendReturningClause(sqlText, asList(columnNames))) {
throw INVALID_COMMAND_FOR_GENERATED_KEYS;
}
execute(sqlText);
generatedKeysResultSet = getResultSet();
return false;
}
@Override
public ResultSet executeQuery(String sql) throws SQLException {
if (!execute(sql)) {
throw NO_RESULT_SET_AVAILABLE;
}
return getResultSet();
}
@Override
public long executeLargeUpdate(String sql) throws SQLException {
if (execute(sql)) {
throw NO_RESULT_COUNT_AVAILABLE;
}
return max(getLargeUpdateCount(), 0);
}
@Override
public long executeLargeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
if (execute(sql, autoGeneratedKeys)) {
throw NO_RESULT_COUNT_AVAILABLE;
}
return max(getLargeUpdateCount(), 0);
}
@Override
public long executeLargeUpdate(String sql, int[] columnIndexes) throws SQLException {
if (execute(sql, columnIndexes)) {
throw NO_RESULT_COUNT_AVAILABLE;
}
return max(getLargeUpdateCount(), 0);
}
@Override
public long executeLargeUpdate(String sql, String[] columnNames) throws SQLException {
if (execute(sql, columnNames)) {
throw NO_RESULT_COUNT_AVAILABLE;
}
return max(getLargeUpdateCount(), 0);
}
@Override
public int executeUpdate(String sql) throws SQLException {
long count = executeLargeUpdate(sql);
return (int) min(count, Integer.MAX_VALUE);
}
@Override
public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
long count = executeLargeUpdate(sql, autoGeneratedKeys);
return (int) min(count, Integer.MAX_VALUE);
}
@Override
public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
long count = executeLargeUpdate(sql, columnIndexes);
return (int) min(count, Integer.MAX_VALUE);
}
@Override
public int executeUpdate(String sql, String[] columnNames) throws SQLException {
long count = executeLargeUpdate(sql, columnNames);
return (int) min(count, Integer.MAX_VALUE);
}
@Override
public void addBatch(String sql) throws SQLException {
checkClosed();
SQLText sqlText = connection.parseSQL(sql);
if (batchCommands == null) {
batchCommands = sqlText;
}
else {
batchCommands.addStatements(sqlText);
}
}
@Override
public void clearBatch() {
batchCommands = null;
}
@Override
public int[] executeBatch() throws SQLException {
checkClosed();
IntegerBatchResults results = new IntegerBatchResults(connection.isStrictMode());
executeBatch(results);
return results.counts;
}
@Override
public long[] executeLargeBatch() throws SQLException {
checkClosed();
LongBatchResults results = new LongBatchResults(connection.isStrictMode());
executeBatch(results);
return results.counts;
}
private void executeBatch(BatchResults results) throws SQLException {
int batchIdx = 0;
try {
warningChain = null;
if (batchCommands == null) {
return;
}
execute(batchCommands);
results.setBatchSize(resultBatches.size());
for (batchIdx = 0; batchIdx < resultBatches.size(); ++batchIdx) {
ResultBatch resultBatch = resultBatches.get(batchIdx);
if (resultBatch.getCommand().equals("SELECT")) {
throw results.getException(batchIdx, "SELECT in executeBatch", null);
}
else if (resultBatch.getRowsAffected() != null) {
results.setUpdateCount(batchIdx, resultBatch.getRowsAffected());
}
else {
results.setUpdateCount(batchIdx, SUCCESS_NO_INFO);
}
}
}
catch (BatchUpdateException bue) {
throw bue;
}
catch (SQLException se) {
throw results.getException(batchIdx, null, se);
}
finally {
resultBatches = ResultBatches.releaseAll(resultBatches);
batchCommands = null;
query = null;
}
}
}