Implement parquet-reader

[acquamarin]

No description provided.

[codecov]

Codecov Report

Attention: 385 lines in your changes are missing coverage. Please review.

Comparison is base (da22d9e) 90.21% compared to head (b43a63c) 89.00%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2076      +/-   ##
==========================================
- Coverage   90.21%   89.00%   -1.22%     
==========================================
  Files         966      987      +21     
  Lines       35019    36057    +1038     
==========================================
+ Hits        31593    32092     +499     
- Misses       3426     3965     +539     

Files	Coverage Δ
src/binder/bind/bind_copy.cpp	91.39% <100.00%> (-0.67%)	⬇️
src/binder/bind/bind_reading_clause.cpp	94.36% <ø> (ø)
src/common/vector/value_vector.cpp	95.39% <100.00%> (+0.13%)	⬆️
src/include/common/types/ku_string.h	100.00% <100.00%> (ø)
src/include/common/types/types.h	100.00% <ø> (ø)
src/include/common/vector/value_vector.h	100.00% <ø> (ø)
src/include/processor/operator/persistent/reader.h	100.00% <ø> (ø)
...cessor/operator/persistent/reader/csv/csv_reader.h	100.00% <ø> (ø)
...persistent/reader/parquet/callback_column_reader.h	100.00% <100.00%> (ø)
...perator/persistent/reader/parquet/parquet_reader.h	100.00% <100.00%> (ø)
... and 22 more

... and 40 files with indirect coverage changes

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[ray6080]

👍 I didn't really get into details for this PR. Only peeked into parts our ValueVector gets used. It's hard to figure out the whole logic right away, but I feel we can trust a bit on duck's code path.

One high level comment: we should try to improve the codecov for this PR by two options: 1) guard code path not enabled at all with LCOV_EXEC_START and LCOV_EXEC_STOP, for example: prefetch mode; 2) see if there are easy cases we can add tests, maybe the following code block?

if (thisOutputChunkRows == 0) {1
--
+         state.finished = true;
+         return false; // end of last group, we are done
+     }