Arina Ielchiieva created DRILL-5533:
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Summary: Fix flag assignment in FunctionInitializer.checkInit()
method
Key: DRILL-5533
URL: https://issues.apache.org/jira/browse/DRILL-5533
Project: Apache Drill
Issue Type: Bug
Affects Versions: 1.10.0
Reporter: Arina Ielchiieva
Assignee: Arina Ielchiieva
Priority: Minor
FunctionInitializer.checkInit() method uses DCL to ensure that function body is
loaded only once. But flag parameter is never updated and all threads are
entering synchronized block.
Also FunctionInitializer.getImports() always returns empty list.
https://github.com/apache/drill/blob/3e8b01d5b0d3013e3811913f0fd6028b22c1ac3f/exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/FunctionInitializer.java
Changes:
1. Fix DCL in FunctionInitializer.checkInit() method (update flag parameter
when function body is loaded).
2. Fix ImportGrabber.getImports() method to return list with imports.
3. Add unit tests for FunctionInitializer.
4, Minor refactoring (rename methods, add javadoc).
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