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fix(bigquery-jdbc): avoid rollback on statement close in manual commit mode #13503

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fix(bigquery-jdbc): avoid rollback on statement close in manual commit mode #13503

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e81a651
fix(bigquery-jdbc): avoid rollback on statement close in manual commi…
yagudin10 Jun 16, 2026
bb53c59
Merge branch 'main' into main
yagudin10 Jun 17, 2026
2751219
fix(bigquery-jdbc): rollback active transactions when closing connection
yagudin10 Jun 18, 2026
f49a91d
Merge branch 'main' into main
yagudin10 Jun 18, 2026
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14 changes: 14 additions & 0 deletions java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryConnection.java
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Original file line number Diff line number Diff line change
Expand Up @@ -970,6 +970,20 @@ private void closeImpl() throws SQLException {
}
this.openStatements.clear();

if (isTransactionStarted()) {
try {
// It looks like there's no need to start a new transaction after a rollback,
// but the commit behavior is preserved since close() may still fail before isClosed is updated.
rollbackImpl();
} catch (SQLException e) {
if (exceptionToThrow == null) {
exceptionToThrow = e;
} else {
exceptionToThrow.addSuppressed(e);
}
}
}

boolean interrupted = Thread.currentThread().isInterrupted();

try {
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3 changes: 0 additions & 3 deletions java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryStatement.java
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Original file line number Diff line number Diff line change
Expand Up @@ -525,9 +525,6 @@ private void closeStatementResources() throws SQLException {
this.currentUpdateCount = -1;
this.currentJobIdIndex = -1;
if (this.connection != null) {
if (this.connection.isTransactionStarted()) {

@logachev logachev Jun 17, 2026

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Can you please add this logic to the connection.closeImpl()?

I think when connection is closed, it needs to cancel any pending transaction otherwise they will be eventually cancelled by some timeout.

@yagudin10 yagudin10 Jun 18, 2026

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Done.
Not sure about calling rollbackImpl() as-is, since it starts a new transaction after the rollback, which seems unnecessary during close().
On the other hand, connection.close() may fail before the connection is fully closed, so keeping the existing rollback behavior might actually be the safer option.

this.connection.rollback();
}
this.connection.removeStatement(this);
}
}
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14 changes: 14 additions & 0 deletions java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/BigQueryStatementTest.java
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Expand Up @@ -486,6 +486,20 @@ public void testCancelWithJoblessQuery() throws SQLException, InterruptedExcepti
verify(bigquery, Mockito.never()).cancel(any(JobId.class));
}

@Test
public void testCancelDoesNotRollbackTransaction() throws SQLException {
doReturn(true).when(bigQueryConnection).isTransactionStarted();
BigQueryStatement statementSpy = Mockito.spy(bigQueryStatement);
statementSpy.jobIds.add(jobId);

statementSpy.cancel();

// Cancel should call bigquery.cancel() but not rollback the transaction
verify(bigquery).cancel(eq(jobId));
verify(bigQueryConnection, Mockito.never()).rollback();
verify(bigQueryConnection).removeStatement(statementSpy);
}

@ParameterizedTest
@ValueSource(booleans = {true, false})
public void testGetStatementType(boolean isReadOnlyTokenUsed) throws Exception {
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88 changes: 88 additions & 0 deletions java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/it/ITBigQueryJDBCTest.java
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Expand Up @@ -2324,6 +2324,94 @@ public void testConnectionWithMultipleTransactionCommits() throws SQLException {
connection.close();
}

@Test
public void testPreparedStatementCloseDoesNotRollbackTransaction() throws SQLException {
String TRANSACTION_TABLE = "JDBC_PS_CLOSE_TABLE" + randomNumber;
String createTransactionTable =
String.format(
"CREATE OR REPLACE TABLE %s.%s (`id` INTEGER, `name` STRING, `age` INTEGER);",
DATASET, TRANSACTION_TABLE);
String insertQuery =
String.format("INSERT INTO %s.%s (id, name, age) VALUES (?, ?, ?);", DATASET, TRANSACTION_TABLE);
String selectQuery =
String.format("SELECT id, name, age FROM %s.%s ORDER BY id;", DATASET, TRANSACTION_TABLE);

bigQueryStatement.execute(createTransactionTable);

try (Connection connection = DriverManager.getConnection(session_enabled_connection_uri)) {
connection.setAutoCommit(false);
try (PreparedStatement ps1 = connection.prepareStatement(insertQuery);
PreparedStatement ps2 = connection.prepareStatement(insertQuery)) {
ps1.setInt(1, 1);
ps1.setString(2, "DwightShrute");
ps1.setInt(3, 10);
assertEquals(1, ps1.executeUpdate());

ps2.setInt(1, 2);
ps2.setString(2, "MichaelScott");
ps2.setInt(3, 20);
assertEquals(1, ps2.executeUpdate());

ps1.close();
connection.commit();

try (ResultSet resultSet = bigQueryStatement.executeQuery(selectQuery)) {
int rowCount = 0;
while (resultSet.next()) {
rowCount++;
assertEquals(rowCount, resultSet.getInt(1));
}
assertEquals(2, rowCount);
}
} finally {
bigQueryStatement.execute(
String.format("DROP TABLE IF EXISTS %s.%s", DATASET, TRANSACTION_TABLE));
}
}
}

@Test
public void testClosingUnusedPreparedStatementDoesNotRollbackPreviousExecute()
throws SQLException {
String TRANSACTION_TABLE = "JDBC_PS_UNUSED_CLOSE_TABLE" + randomNumber;
String createTransactionTable =
String.format(
"CREATE OR REPLACE TABLE %s.%s (`id` INTEGER, `name` STRING, `age` INTEGER);",
DATASET, TRANSACTION_TABLE);
String insertQuery =
String.format("INSERT INTO %s.%s (id, name, age) VALUES (?, ?, ?);", DATASET, TRANSACTION_TABLE);
String selectQuery =
String.format("SELECT id, name, age FROM %s.%s ORDER BY id;", DATASET, TRANSACTION_TABLE);

bigQueryStatement.execute(createTransactionTable);

try (Connection connection = DriverManager.getConnection(session_enabled_connection_uri)) {
connection.setAutoCommit(false);
try (PreparedStatement ps1 = connection.prepareStatement(insertQuery);
PreparedStatement ps2 = connection.prepareStatement(insertQuery)) {

ps2.setInt(1, 1);
ps2.setString(2, "MichaelScott");
ps2.setInt(3, 20);
assertEquals(1, ps2.executeUpdate());

ps1.close();
connection.commit();

try (ResultSet resultSet = bigQueryStatement.executeQuery(selectQuery)) {
assertTrue(resultSet.next());
assertEquals(1, resultSet.getInt(1));
assertEquals("MichaelScott", resultSet.getString(2));
assertEquals(20, resultSet.getInt(3));
assertFalse(resultSet.next());
}
}
} finally {
bigQueryStatement.execute(
String.format("DROP TABLE IF EXISTS %s.%s", DATASET, TRANSACTION_TABLE));
}
}

// Private Helper functions
private String getSessionId() throws InterruptedException {
QueryJobConfiguration stubJobConfig =
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