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https://issues.apache.org/jira/browse/IMPALA-12503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17802367#comment-17802367
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Wenzhe Zhou commented on IMPALA-12503:
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Currently external data source only support binary predicates. TBinaryPredicate
and comparison operators TComparisonOp are defined at
https://github.com/apache/impala/blob/master/common/thrift/ExternalDataSource.thrift#L54-L81
Planner handle DataSource Table in class DataSourceScanNode. It gets predicates
in function [DataSourceScanNode.getDisjuncts()
|https://github.com/apache/impala/blob/master/fe/src/main/java/org/apache/impala/planner/DataSourceScanNode.java#L217-L268],
pass to JdbcDataSource in
[prepare()|https://github.com/apache/impala/blob/master/fe/src/main/java/org/apache/impala/planner/DataSourceScanNode.java#L189C1-L189C55
API. prepare() API return accepted predicates.
JdbcDataSource.[prepare()|https://github.com/apache/impala/blob/master/java/ext-data-source/jdbc/src/main/java/org/apache/impala/extdatasource/jdbc/JdbcDataSource.java#L130-L140]
decide which predicates are accepted.
Planner currently don't support date and timestamp type for predicates:
https://github.com/apache/impala/blob/master/fe/src/main/java/org/apache/impala/planner/DataSourceScanNode.java#L139-L141
> Support date and timestamp data type for predicates for external data source
> table
> ----------------------------------------------------------------------------------
>
> Key: IMPALA-12503
> URL: https://issues.apache.org/jira/browse/IMPALA-12503
> Project: IMPALA
> Issue Type: Sub-task
> Components: Backend, Frontend
> Reporter: Wenzhe Zhou
> Assignee: gaurav singh
> Priority: Major
>
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