The fix of JDBC-464 didn't fix all cases.

If ResultSetMetaData.getPrecision is called for a numeric or decimal column while no transaction is active (and the method wasn't called earlier when a transaction was active for the same RSMD), then this will fail with an exception.

The cause is that RSMD will execute the query, but as the FBConnection is not accessible in the context, it can only piggyback on an existing transaction instead of starting a new one. We should change this so it can either start a new normal transaction, or start a separate transaction for this metadata query (and commit that asap).

Also investigate if similar problems occur elsewhere (prime candidates are where the constructor FBDatabaseMetaData(GDSHelper gdsHelper) is used instead of FBDatabaseMetaData(AbstractConnection c).

Exception in 3.0 beta 1:

java.sql.SQLNonTransientException: No transaction or transaction not ACTIVE

at org.firebirdsql.gds.ng.TransactionHelper.checkTransactionActive(TransactionHelper.java:49)
at org.firebirdsql.gds.ng.wire.version11.V11Statement.prepare(V11Statement.java:57)
at org.firebirdsql.jdbc.FBStatement.prepareFixedStatement(FBStatement.java:1399)
at org.firebirdsql.jdbc.AbstractPreparedStatement.prepareFixedStatement(AbstractPreparedStatement.java:1229)
at org.firebirdsql.jdbc.AbstractPreparedStatement.<init>(AbstractPreparedStatement.java:147)
at org.firebirdsql.jdbc.FBPreparedStatement.<init>(FBPreparedStatement.java:50)
at org.firebirdsql.jdbc.FBDatabaseMetaData.getStatement(FBDatabaseMetaData.java:5035)
at org.firebirdsql.jdbc.FBDatabaseMetaData.doQuery(FBDatabaseMetaData.java:5061)
at org.firebirdsql.jdbc.FBResultSetMetaData.getExtendedFieldInfo(FBResultSetMetaData.java:506)
at org.firebirdsql.jdbc.AbstractFieldMetaData.getExtFieldInfo(AbstractFieldMetaData.java:342)
at org.firebirdsql.jdbc.AbstractFieldMetaData.getPrecisionInternal(AbstractFieldMetaData.java:280)
at org.firebirdsql.jdbc.FBResultSetMetaData.getPrecision(FBResultSetMetaData.java:281)
at org.firebirdsql.jdbc.TestFBResultSetMetaData.getPrecisionOfNumericColumnWithoutActiveTransaction(TestFBResultSetMetaData.java:305)

Exception in Jaybird 2.2.x:

org.firebirdsql.jdbc.FBSQLException: GDS Exception. 335544332. invalid transaction handle (expecting explicit transaction start)

at org.firebirdsql.jdbc.AbstractPreparedStatement.<init>(AbstractPreparedStatement.java:137)
at org.firebirdsql.jdbc.FBPreparedStatement.<init>(FBPreparedStatement.java:45)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.firebirdsql.jdbc.FBStatementFactory.createPreparedStatement(FBStatementFactory.java:89)
at org.firebirdsql.jdbc.AbstractDatabaseMetaData.getStatement(AbstractDatabaseMetaData.java:6175)
at org.firebirdsql.jdbc.AbstractDatabaseMetaData.doQuery(AbstractDatabaseMetaData.java:6203)
at org.firebirdsql.jdbc.FBResultSetMetaData.getExtendedFieldInfo(FBResultSetMetaData.java:833)
at org.firebirdsql.jdbc.FBResultSetMetaData.getExtFieldInfo(FBResultSetMetaData.java:682)
at org.firebirdsql.jdbc.FBResultSetMetaData.getPrecision(FBResultSetMetaData.java:305)
at org.firebirdsql.jdbc.TestFBResultSetMetaData.getPrecisionOfNumericColumnWithoutActiveTransaction(TestFBResultSetMetaData.java:361)
at ...
Caused by: org.firebirdsql.gds.GDSException: invalid transaction handle (expecting explicit transaction start)
at org.firebirdsql.gds.impl.wire.AbstractJavaGDSImpl.validateHandle(AbstractJavaGDSImpl.java:3246)
at org.firebirdsql.gds.impl.wire.AbstractJavaGDSImpl.iscDsqlPrepare(AbstractJavaGDSImpl.java:1454)
at org.firebirdsql.gds.impl.GDSHelper.prepareStatement(GDSHelper.java:214)
at org.firebirdsql.jdbc.AbstractStatement.prepareFixedStatement(AbstractStatement.java:1388)
at org.firebirdsql.jdbc.AbstractPreparedStatement.prepareFixedStatement(AbstractPreparedStatement.java:1269)
at org.firebirdsql.jdbc.AbstractPreparedStatement.<init>(AbstractPreparedStatement.java:134)
... 41 more