ADBDEV-6776 Restore PXF unit tests for external table#145

Draft

dkovalev1 wants to merge 1 commit intopxf-6.xfrom ADBDEV-6776

+4,281-723

Commits on Dec 2, 2024

PXF external table unit tests partially restored. They can be compiled and some of them works.
dkovalev1
committed