expressions: make unknown column distinguishable #17
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This patch makes "UnKnownColumn" expression distinguishable from actual "Column" expression to have an ability to compare them in planning tests. For now "UnKnownColumn" string representation is started from `?` symbol, for example, `partitioning=Hash([`?a@0`], 1)`.
aectaan
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Sep 29, 2025
… ParquetOpener (apache#15561) * parquet reader: move pruning predicate creation from ParquetSource to ParquetOpener * use file schema, avoid loading page index if unecessary * Add comment * add comment * Add comment * remove check * fix clippy * update sqllogictest * restore to explain plans * reverted * modify access * Fix ArrowReaderOptions should read with physical_file_schema so we do… (tarantool#17) * Fix ArrowReaderOptions should read with physical_file_schema so we don't need to cast back to utf8 * Fix fmt * Update opener.rs * Always apply per-file schema during parquet read (tarantool#18) * Update datafusion/datasource-parquet/src/opener.rs --------- Co-authored-by: Qi Zhu <821684824@qq.com> Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
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This patch makes "UnKnownColumn" expression distinguishable from actual "Column" expression to have an ability to compare them in planning tests. For now "UnKnownColumn" string representation is started from
?symbol, for example,partitioning=Hash([?a@0], 1).