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https://issues.apache.org/jira/browse/FLINK-4825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timo Walther updated FLINK-4825:
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Description:
The added {{ReduceExpressionRule}} leads to inconsistent behavior. Because some
parts of an expression are evalutated using Flink's code generation and some
parts use Calcite's code generation.
A very easy example: boolean expressions casted to string are represented as
"TRUE/FALSE" using Calcite and "true/false" using Flink.
I propose to implement the RexExecutor interface and forward the calls to
Flink's code generation. Additional improvements in order to be more standard
compliant could be solved in new Jira issues.
I will disable the rule and the corresponding tests till this issue is fixed.
was:
The added {{ReduceExpressionRule}} leads to inconsistent behavior. Because some
parts of an expression are evalutated using Flink's code generation and some
parts use Calcite's code generation.
A very easy example: boolean expressions casted to string are represented as
"TRUE/FALSE" using Calcite and "true/false" using Flink.
I propose to implement the RexExecutor interface and forward the calls to
Flink's code generation. Additional improvements in order to be more standard
compliant could be solved in new Jira issues.
> Implement a RexExecutor that uses Flink's code generation
> ---------------------------------------------------------
>
> Key: FLINK-4825
> URL: https://issues.apache.org/jira/browse/FLINK-4825
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
>
> The added {{ReduceExpressionRule}} leads to inconsistent behavior. Because
> some parts of an expression are evalutated using Flink's code generation and
> some parts use Calcite's code generation.
> A very easy example: boolean expressions casted to string are represented as
> "TRUE/FALSE" using Calcite and "true/false" using Flink.
> I propose to implement the RexExecutor interface and forward the calls to
> Flink's code generation. Additional improvements in order to be more standard
> compliant could be solved in new Jira issues.
> I will disable the rule and the corresponding tests till this issue is fixed.
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