maytasm commented on code in PR #13612:
URL: https://github.com/apache/druid/pull/13612#discussion_r1066523891
##########
extensions-core/parquet-extensions/example/compat/nested_array_struct.json:
##########
@@ -45,7 +45,8 @@
},
"dimensionsSpec": {
"dimensions": [
- "i32_dec"
+ "i32_dec",
+ "primitive"
Review Comment:
Some of our existing tests (such as
CompatParquetInputTest#testReadNestedArrayStruct) read parquet using this
configs. Reading is done via the RecordReader which used to read more than
needed before this PR. For example, in
CompatParquetInputTest#testReadNestedArrayStruct we expect the InputRow we read
to have `primitive` column. However, the spec (before this change) does not
need/require/consume the `primitive` column (`primitive` is not in the metric,
dimension, transform, etc). To fix the test, we can either make it so that the
spec requires the `primitive` (i.e. adding `primitive` to dimensionSpec) or
remove the assert check on `primitive` column. Basically, our Reader is more
efficient and only read what is needed, breaking some existing tests.
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