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Posted to issues@arrow.apache.org by "kabicm (via GitHub)" <gi...@apache.org> on 2023/11/22 00:43:28 UTC
[I] Applying arrow::compute::Expression on arrow::Table [arrow]
kabicm opened a new issue, #38838:
URL: https://github.com/apache/arrow/issues/38838
### Describe the usage question you have. Please include as many useful details as possible.
As part of implementing a project operator, I am having a vector of expressions that should be applied to an `arrow::Table` object.
I see that `arrow::compute::Expression` can be applied to an `ExecBatch` object by invoking `arrow::compute::ExecuteScalarExpression` function. However, seems that this function only works on ExecBatch.
How can I apply an expression on a table? Moreover, how can I apply a vector of expression on a table?
### Component(s)
C++
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Re: [I] Applying arrow::compute::Expression on arrow::Table [arrow]
Posted by "js8544 (via GitHub)" <gi...@apache.org>.
js8544 commented on issue #38838:
URL: https://github.com/apache/arrow/issues/38838#issuecomment-1822923169
There is a `MakeExecBatch` function right before `ExecuteScalarExpression` that takes a `Datum`, and `Datum` can be constructed from a `Table`.
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Re: [I] Applying arrow::compute::Expression on arrow::Table [arrow]
Posted by "kabicm (via GitHub)" <gi...@apache.org>.
kabicm commented on issue #38838:
URL: https://github.com/apache/arrow/issues/38838#issuecomment-1848411967
Great, thanks Jin!
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Re: [I] Applying arrow::compute::Expression on arrow::Table [arrow]
Posted by "kabicm (via GitHub)" <gi...@apache.org>.
kabicm closed issue #38838: Applying arrow::compute::Expression on arrow::Table
URL: https://github.com/apache/arrow/issues/38838
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