java.sql.SQLException: java.io.IOException: Failed to read boolean value, expect 0 (false) or 1 (true) but we got: 67

[sunqiaozz]

When you read clickhouse data using jdbc, the next() function of the ResultSet reports an error when you are halfway through reading ClickHouse data，java.sql.SQLException: java.io.IOException: Failed to read boolean value, expect 0 (false) or 1 (true) but we got: 67

[chernser]

Good day, @sunqiaozz !
Would you please provide more details about the issue?
Stacktrace? version? What is query?

[sunqiaozz]

Hi,brother
When I use the JDBC driver to connect to ClickHouse, I get the Connection, and then execute the SQL statement to get the ResultSet, and call the next() method to get the data, this error will occur after reading for some time.

ResultSet rs = executeQuery(sql);
while (rs.next()) {}

I tried to read ClickHouse's JDBC source code and found that it was currentRow = rowCursor.next() in the next() method of the ClickHouseResultSet class; An error occurred in the code

@Override
public boolean next() throws SQLException {
	ensureOpen();

	lastReadColumn = 0;
	boolean hasNext = true;
	if (hasNext()) {
		try {
			currentRow = rowCursor.next();
		} catch (UncheckedIOException e) {
			throw SqlExceptionUtils.handle(e);
		}
		rowNumber++;
	} else {
		currentRow = null;
		hasNext = false;
	}
	return hasNext;
}

Then I tried using the latest JDBC driver and it still didn't work

Good day, @sunqiaozz ! Would you please provide more details about the issue? Stacktrace? version? What is query?

[sunqiaozz]

Good day, @sunqiaozz ! Would you please provide more details about the issue? Stacktrace? version? What is query?

brother，Do you have time?

[mshustov]

@sunqiaozz could you provide a snippet of your program as was asked above?

[chernser]

@sunqiaozz
yes, but I need information in the issue, too. Because it is how we share experience about problem to prevent them in future. :-)

[livk-cloud]

When I upgraded from 0.7.2 to 0.8.0, alter table user delete where reg_time=2024-01-25 was called to delete the data and the return went from 1 to 0

[sunqiaozz]

brother,I mean I executed a normal query using jdbc, and then the rs.next() method, and this error occurred during my data read

Class.forName("com.clickhouse.jdbc.ClickHouseDriver");
Connection connection = DriverManager.getConnection(url,username,password);
Statement statement = connection.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY);
ResultSet rs = statement.executeQuery(sql);
while (rs.next()) {}

@sunqiaozz could you provide a snippet of your program as was asked above?

[sunqiaozz]

@sunqiaozz yes, but I need information in the issue, too. Because it is how we share experience about problem to prevent them in future. :-)

brother，Do you need sql?

[sunqiaozz]

When I upgraded from 0.7.2 to 0.8.0, alter table user delete where reg_time=2024-01-25 被调用以删除数据，并且返回值从 1 变为 0

brother，Does version 0.8 also have this problem

[livk-cloud]

When I upgraded from 0.7.2 to 0.8.0, alter table user delete where reg_time=2024-01-25 被调用以删除数据，并且返回值从 1 变为 0

brother，Does version 0.8 also have this problem

I'm not quite sure about this issue, but it did occur when I upgraded to 0.8.0, but in the 0.7.2 release, it didn't happen

[chernser]

@livk-cloud thank you for the info.
@livk-cloud @sunqiaozz
The problem is that in 0.8.0 JDBC is of a new implementation (as announced https://clickhouse.com/docs/en/integrations/java/jdbc-v2).
There is a system property clickhouse.jdbc.v1 to switch back to the old implementation clickhouse.jdbc.v1=true