feat: add unknownLength connection property #2286
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Adds an `unknownLength` connection property that can be used to configure the length that the JDBC driver should return as the data type / column length when this is not known. Spanner does not return the (maximum) length of a column in ResultSetMetadata. This means that the JDBC driver does not know what the length is of the various columns in query results. The value of `unknownLength` will be returned when the getPrecision and getColumnDisplaySize methods of ResultSetMetaData are called. This connection property aligns with the same connection parameter in the PostgreSQL JDBC driver: https://jdbc.postgresql.org/documentation/use/#connection-parameters
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Nov 14, 2025
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[Do not merge] Depends on googleapis/java-spanner#4223
Adds an
unknownLengthconnection property that can be used to configure the length that the JDBC driver should return as the data type / column length when this is not known. Spanner does not return the (maximum) length of a column in ResultSetMetadata. This means that the JDBC driver does not know what the length is of the various columns in query results.The value of
unknownLengthwill be returned when the getPrecision and getColumnDisplaySize methods of ResultSetMetaData are called.This connection property aligns with the same connection parameter in the PostgreSQL JDBC driver: https://jdbc.postgresql.org/documentation/use/#connection-parameters