DataType Error when connecting PostgreSQL Source: Unsupported precision for data type

[hennlo]

Operating System (Polypheny-DB)

Linux

Polypheny-DB Version

v.0.9.0

Affected Areas

DB, UI

Browser

No response

Client Operating System

SLES 15 SP4

Bug Description

When connecting a PostgreSQL Data Source table containing a column with type timestamp without timezone
The creation fails with the following error:

Caused by: java.lang.RuntimeException: Unsupported precision for data type timestamp: 6

When looking at the source table the issue revolves around a column with the type: timestamp without timezone

If we were to remove this column the connection and consequently the creation of the source is successful.

Reproduction Steps

• Create a PSQL table containing a column with type: timestamp without timezone.
• Within Polypheny add a new PostgreSQL Source Adapter on that specific table
• Within the service log under linux journalctl -u polypheny.service observer an error similiar to:

Caused by: java.lang.RuntimeException: Unsupported precision for data type timestamp

Expected Behavior

Adapt and correctly translate the remote type to Polypheny Timestamp Type. Maybe even always assume UTC or convert it to string? Because a timestamp without timezone is meaningless anyway

Also the failure message could be improved instead of "Adapter could not be deployed" give a more insightful response without the need to consult the error log.

Relevant Log Output

Caused by: java.lang.RuntimeException: Unsupported precision for data type timestamp: 6
Jun 05 10:32:34 myVMInstance Polypheny[25395]:         at org.polypheny.db.adapter.jdbc.sources.AbstractJdbcSource.getExportedColumns(AbstractJdbcSource.java:251) ~[?:?]
Jun 05 10:32:34 myVMInstance Polypheny[25395]:         at org.polypheny.db.ddl.DdlManagerImpl.addAdapter(DdlManagerImpl.java:239) ~[Polypheny.jar:0.9.0]
Jun 05 10:32:34 myVMInstance Polypheny[25395]:         at org.polypheny.db.sql.language.ddl.SqlAlterAdaptersAdd.execute(SqlAlterAdaptersAdd.java:98) ~[?:?]
Jun 05 10:32:34 myVMInstance Polypheny[25395]:         at org.polypheny.db.processing.Processor.getResult(Processor.java:69) ~[Polypheny.jar:0.9.0]
Jun 05 10:32:34 myVMInstance Polypheny[25395]:         at org.polypheny.db.processing.Processor.prepareDdl(Processor.java:53) ~[Polypheny.jar:0.9.0]
Jun 05 10:32:34 myVMInstance Polypheny[25395]:         at org.polypheny.db.webui.Crud.processQuery(Crud.java:3425) ~[Polypheny.jar:0.9.0]
Jun 05 10:32:34 myVMInstance Polypheny[25395]:         at org.polypheny.db.webui.Crud.executeSqlUpdate(Crud.java:3454) ~[Polypheny.jar:0.9.0]
Jun 05 10:32:34 myVMInstance Polypheny[25395]:         ... 55 more