ARROW-10162: [Rust] Add pretty print support for DictionaryArray #8331
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rust/arrow/src/util/pretty.rs
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I don't really grok why the error messages refer to repl in this file, but I have carried forward the tradition with this PR
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I think this (pretty printing) was part of DataFusion's cli to begin with but was moved into arrow as it was generally useful. I don't understand repl in this context either. I suggest updating it.
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I will update the messages.
rust/arrow/src/util/pretty.rs
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I made this pub so I could call it from datafusion/src/test/sql.rs which currently has a copy/pasted version of pretty printing in array_str: https://github.com/apache/arrow/blob/master/rust/datafusion/tests/sql.rs#L646
rust/arrow/src/util/pretty.rs
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There is no reason / need to clone to column when printing each value
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Changes look good to me, but I'm wondering now how the existing code handles null values in the primitive arrays. Seems to me that would print the default value. For Would it make sense to fix this in the same PR or should I open a separate ticket? |
Yes you are correct (that the behavior is incorrect). Good point. I opened https://issues.apache.org/jira/browse/ARROW-10169 and #8332 |
Null values should be printed as "" when pretty printing. Prior to this PR, , null values in primitive arrays were rendered as the type's default value as pointed out by @jhorstmann on #8331 (comment) Closes #8332 from alamb/alamb/ARROW-10169-fix-null-in-pretty-print Authored-by: alamb <[email protected]> Signed-off-by: Jorge C. Leitao <[email protected]>
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Rebased to resolve conflicts |
Null values should be printed as "" when pretty printing. Prior to this PR, , null values in primitive arrays were rendered as the type's default value as pointed out by @jhorstmann on apache/arrow#8331 (comment) Closes #8332 from alamb/alamb/ARROW-10169-fix-null-in-pretty-print Authored-by: alamb <[email protected]> Signed-off-by: Jorge C. Leitao <[email protected]>
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This adds some logic for handling dictionary arrays when pretty printing batches. Part of a larger set of work I am working on for better DictionaryArray handling: https://issues.apache.org/jira/browse/ARROW-10159