You can create a minischema for a text file data source. Although only self-joins within a file are supported, a minischema for a text file data source can be useful for viewing files.
In the Select Minischema page of the Connection Wizard, you can perform the following actions:
Create a new minischema diagram; the minischema will contain only self joins (joins between columns in a single file). It will not contain joins between files.
Reuse an existing minischema diagram, with an option to clear the existing schema.
Note: | The “Use Introspection to detect hierarchies” option is not supported for text files. |