It also removes force_multifile_merge GUC variable and uses estimated number of rows to calculate merge cost. The current version of parquet_fdw uses different number of rows to calculate merge cost and to pass to PostgreSQL planner. This PR uses same number of rows which is passed to PostgreSQL planner.
The is rebase of https://github.com/adjust/parquet_fdw/pull/50.
It also removes
force_multifile_mergeGUC variable and uses estimated number of rows to calculate merge cost. The current version of parquet_fdw uses different number of rows to calculate merge cost and to pass to PostgreSQL planner. This PR uses same number of rows which is passed to PostgreSQL planner.