feat: Add FFI_TableProviderFactory support#1396
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This wraps the new FFI_TableProviderFactory APIs in datafusion-ffi.
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Which issue does this PR close?
Closes #1393
Rationale for this change
This PR wraps the new FFI_TableProviderFactory to support custom
CREATE EXTERNAL TABLEstatements.What changes are included in this PR?
Mostly just the new wrappers and additions to the FFI example. Though there are two temporary commits to account for using the latest version of datafusion and the necessary updates for that to work.
Are there any user-facing changes?
There's now a
TableProviderFactoryExportableprotocol for use in the newContext::register_table_factoryAPI.