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Posted to jira@arrow.apache.org by "Andrew Lamb (Jira)" <ji...@apache.org> on 2021/01/28 11:46:00 UTC

[jira] [Created] (ARROW-11414) [Rust] Reduce copies in Schema::try_merge

Andrew Lamb created ARROW-11414:
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             Summary: [Rust] Reduce copies in Schema::try_merge
                 Key: ARROW-11414
                 URL: https://issues.apache.org/jira/browse/ARROW-11414
             Project: Apache Arrow
          Issue Type: Improvement
            Reporter: Andrew Lamb


https://github.com/apache/arrow/blob/ab5fc979c69ccc5dde07e1bc1467b02951b4b7e9/rust/arrow/src/datatypes.rs#L1832-L1860

I was looking at this code yesterday while using it in IOx -- https://github.com/influxdata/influxdb_iox/pull/703

Even though Schema::try_merge requires a slice of Schemas (not schema refs), it copies all of its fields. This is not ideal in the common case where most of the fields in the Schema will be the same



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