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https://issues.apache.org/jira/browse/CALCITE-1339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-1339:
---------------------------------
Description:
Allow deeply nested scalar expressions. Currently an expression '0 * deptno + 1
* deptno + ...' causes a StackOverflowError at about 600 (depth 1,200).
I suspect we need to change some recursive functions (or visitors) into dynamic
programming. The attached workspace
https://github.com/julianhyde/calcite/tree/1339-deep-expressions adds
{{SqlToRelConverterTest.testLarge}} (based on {{SqlValidatorTest.testLarge}})
and flattens some recursive calls but is not yet complete.
was:
Allow deeply nested scalar expressions. Currently an expression '0 * deptno + 1
* deptno + ...' causes a StackOverflowError at about 600 (depth 1,200).
I suspect we need to change some recursive functions (or visitors) into dynamic
programming. The attached workspace adds SqlToRelConverterTest.testLarge (based
on SqlValidatorTest.testLarge) and flattens some recursive calls.
> Allow deeply nested scalar expressions
> --------------------------------------
>
> Key: CALCITE-1339
> URL: https://issues.apache.org/jira/browse/CALCITE-1339
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
>
> Allow deeply nested scalar expressions. Currently an expression '0 * deptno +
> 1 * deptno + ...' causes a StackOverflowError at about 600 (depth 1,200).
> I suspect we need to change some recursive functions (or visitors) into
> dynamic programming. The attached workspace
> https://github.com/julianhyde/calcite/tree/1339-deep-expressions adds
> {{SqlToRelConverterTest.testLarge}} (based on {{SqlValidatorTest.testLarge}})
> and flattens some recursive calls but is not yet complete.
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