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test: show stats in explain of two representative queries #8173
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@alamb : At first I thought I would add many small queries and on single data type but it turns out, if I do so, I have to add quite many and also many combinations for different data types. Still, they do not cover the propagation I want to see. Thus, I have to add complicated queries plus those small queries.
To avoid that, I decided to go with 2 quite representative queries, one on CVS file and one on parquet file. Each I have different combinations of filters on different data types and includes common standard SQL clauses (select, from, where, group by, having, order by, limit). They not only show the statistics for each operator but also how they are propagated upward.
Let me know what you think. I am happy to add small queries, too
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I think this makes sense and is a great first step.