Running schema extractor in old mode

The fgldbsch program can be executed in old mode by specifying the -om option as first parameter, followed by the database source. You can pass the -c and -r options after the database source:

fgldbsch -om test1 -c -r

The -c option is equivalent to -cv BBBBBBBBB in the default mode: Columns defined with an SQL type that is not a native Genero type will be converted to an equivalent type (see -cv and -ct options for more details).

If the -r option is specified, the schema extractor will ignore columns defined with unsupported SQL types. Unsupported types have no equivalent FGL type to store and handle the value, such as BLOB or CLOB for example. Understand that unlike the -ie option, which skips the whole table definition, -r will exclude table columns with unsupported types, but the other columns defined with supported types will be written to the .sch file. Thus, a record declared with DEFINE RECORD rec LIKE table.* (from a partial schema definition of a table) cannot be used in a SELECT * INTO rec.* statement, because the number of columns in the database table is different from the record definition.

When using the fgldbsch -om mode, fgldbsch will extract system catalog tables (informix.sys*) for IBM Informix databases.