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* refactor: add datafusion-postgres dependency * refactor: move and include pg_catalog udfs * chore: update upstream * feat: register table function pg_get_keywords * feat: bridge CatalogInfo for our CatalogManager Signed-off-by: Ning Sun <sunning@greptime.com> * feat: convert pg_catalog table to our system table * feat: bridge system catalog with datafusion-postgres Signed-off-by: Ning Sun <sunning@greptime.com> * feat: add more udfs * feat: add compatibility rewriter to postgres handler * fix: various fix * fmt: fix * fix: use functions from pg_catalog library * fmt * fix: sqlness runner Signed-off-by: Ning Sun <sunning@greptime.com> * test: adopt arrow 56.0 to 56.1 memory size change * fix: add additional udfs * chore: format * refactor: return None when creating system table failed Signed-off-by: Ning Sun <sunning@greptime.com> * chore: provide safety comments about expect usage --------- Signed-off-by: Ning Sun <sunning@greptime.com>