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Add documentation about type signatures, and export TIMEZONE_WILDCARD #7726

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merged 3 commits into from
Oct 7, 2023

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alamb
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@alamb alamb commented Oct 2, 2023

Which issue does this PR close?

Follow on to #7720

Rationale for this change

While reviewing #7720 from @mhilton
I realized that the type coercion / signatures were not as well documented as well as they could be (e.g. the fact that DataFuson would coerce arguments for example, was somewhat implied).

What changes are included in this PR?

  1. Improve the Signature and TypeSignature documentation
  2. Rename TIMEZONE_PLACEHOLDER to TIMEZONE_WILDCARD (added in fix: coerce text to timestamps with timezones #7720) to better represent what it means

Are these changes tested?

Yes, with a new doc example as well as existing tests

Are there any user-facing changes?

better docs and TIMEZONE_WILDCARD is better documented

@github-actions github-actions bot added the logical-expr Logical plan and expressions label Oct 2, 2023
@alamb alamb changed the title Add documentation and export TIMEZONE_WILDCARD Add documentation about type signatures, and export TIMEZONE_WILDCARD Oct 2, 2023
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@2010YOUY01 2010YOUY01 left a comment

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Nice doc, I also found Volatility confusing when first saw it

Co-authored-by: Yongting You <2010youy01@gmail.com>
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@mhilton mhilton left a comment

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Thanks for those documentation changes, they make things a lot clearer.

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@yjshen yjshen left a comment

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LGTM. Thanks @alamb!

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alamb commented Oct 7, 2023

Thanks @yjshen !

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4 participants