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https://issues.apache.org/jira/browse/IMPALA-14737?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltán Borók-Nagy updated IMPALA-14737:
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Description:
Iceberg's
[https://github.com/apache/iceberg/blob/main/api/src/main/java/org/apache/iceberg/expressions/Expressions.java]
supports more possibilities than what we currently use.
The most important one is probably
* startsWith()
I.e., when we have the following predicate: {{string_col LIKE 'asdf%xyz'}}
We should push down:
* startsWith("string_col", "asdf")
I.e., the non-wildcard prefix of the string.
It should work for UTF-8 strings as well.
was:
Iceberg's
[https://github.com/apache/iceberg/blob/main/api/src/main/java/org/apache/iceberg/expressions/Expressions.java]
supports more possibilities than what we currently use.
The most important one is probably
* startsWith()
I.e., when we have the following predicate: {{string_col LIKE 'asdf%xyz'}}
We should push down:
* startsWith("string_col", "asdf")
I.e., the non-wildcard prefix of the string.
It should work for UTF-8 strings.
> Pushdown LIKE predicates to Iceberg
> -----------------------------------
>
> Key: IMPALA-14737
> URL: https://issues.apache.org/jira/browse/IMPALA-14737
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Zoltán Borók-Nagy
> Priority: Major
> Labels: impala-iceberg, ramp-up
>
> Iceberg's
> [https://github.com/apache/iceberg/blob/main/api/src/main/java/org/apache/iceberg/expressions/Expressions.java]
> supports more possibilities than what we currently use.
> The most important one is probably
> * startsWith()
> I.e., when we have the following predicate: {{string_col LIKE 'asdf%xyz'}}
> We should push down:
> * startsWith("string_col", "asdf")
> I.e., the non-wildcard prefix of the string.
> It should work for UTF-8 strings as well.
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