BigQuery returns "Unparseable query parameter `` in type `TYPE_INT64`" when the query projects a literal that is a parameter of a prepared statement - jdbc

Question

BigQuery returns the error Unparseable query parameter `` in type ``TYPE_INT64``" when executing a query that meets all these conditions:
I run the query as a prepared statement.
The query has a literal of type String in the SELECT.
The value of this literal is passed as a parameter. For example SELECT ? AS field_1....
For example, this code:
import java.sql.*;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class TestBigQueryPreparedStatement {
private static final String CONNECTION_URI =
"jdbc:bigquery://<connection_uri>";
private static final String QUERY = "SELECT ? AS `_SOURCE_TABLE`, field1 FROM test_view";
public static void main(String[] args) throws ClassNotFoundException {
Class.forName("com.simba.googlebigquery.jdbc42.Driver");
try (Connection connection = DriverManager.getConnection(CONNECTION_URI)) {
try (PreparedStatement ps = connection.prepareStatement(QUERY)) {
// The problem also occurs if I replace this line with "ps.setObject(...)
ps.setString(1, "SOURCE_TABLE");
try (ResultSet rs = ps.executeQuery()) {
while (rs.next()) {
System.out.println(rs.getString(1) + " " + rs.getInt(2));
}
}
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
Produces this error:
java.sql.SQLException: [Simba][BigQueryJDBCDriver](100032) Error executing query job. Message: Unparseable query parameter `` in type `TYPE_INT64`, Bad int64 value: SOURCE_TABLE value: 'SOURCE_TABLE'
at com.simba.googlebigquery.googlebigquery.client.requests.jobs.JobsInsertRequest.throwException(Unknown Source)
at com.simba.googlebigquery.googlebigquery.client.requests.AbstractRequestWithRetry.executeWithRetry(Unknown Source)
at com.simba.googlebigquery.googlebigquery.client.queryclient.JobsInsertClient.executeQuery(Unknown Source)
at com.simba.googlebigquery.googlebigquery.client.BQClient.executeQuery(Unknown Source)
at com.simba.googlebigquery.googlebigquery.dataengine.BQAbstractExecutor.execute(Unknown Source)
at com.simba.googlebigquery.googlebigquery.dataengine.BQSQLExecutor.execute(Unknown Source)
at com.simba.googlebigquery.jdbc.common.SPreparedStatement.executeWithParams(Unknown Source)
at com.simba.googlebigquery.jdbc.common.SPreparedStatement.executeQuery(Unknown Source)
at TestBigQueryPreparedStatement.main(TestBigQueryPreparedStatement.java:20)
Caused by: com.simba.googlebigquery.googlebigquery.client.exceptions.JobExecutionErrorException: [Simba][BigQueryJDBCDriver](100032) Error executing query job. Message: Unparseable query parameter `` in type `TYPE_INT64`, Bad int64 value: SOURCE_TABLE value: 'SOURCE_TABLE'
... 9 more
Caused by: java.lang.Exception: Unparseable query parameter `` in type `TYPE_INT64`, Bad int64 value: SOURCE_TABLE value: 'SOURCE_TABLE'
at com.simba.googlebigquery.googlebigquery.client.requests.jobs.JobsInsertRequest.execute(Unknown Source)
at com.simba.googlebigquery.googlebigquery.client.requests.jobs.JobsInsertRequest.execute(Unknown Source)
... 8 more
Reproducible with the latest JDBC driver of BigQuery (Simba v1.3.0 1001).
This error also occurs with PreparedStatement.setDate(...) and setFloat(...) but works fine with setDecimal(...), setInt(...) (I have not checked the output with all the setXXX methods of PreparedStatement)
Is it possible to execute in BigQuery queries that have a literal in the SELECT and to execute the query as a prepared statement?
This is a sample scenario. My application has an execution engine that runs SQL queries on any database and it always does so with prepared statements. Occasionally, the query will have a literal in the SELECT and with BigQuery, I get this error above (it works with any other database). I can do certain changes specifically for the query generator of BigQuery but it would be very difficult to change the code so the literals in the SELECT clause are passed as literals, not parameters of the prepared statement.

Answer 1

You cannot use positional query parameters in the select or from part of the query. Positional parameters can only occur in the where clause of the query.
SELECT word, word_count
FROM `bigquery-public-data.samples.shakespeare`
WHERE corpus = ?
AND word_count >= ?
ORDER BY word_count DESC;";
See also https://cloud.google.com/bigquery/docs/samples/bigquery-query-params-positional