vlsi commented on a change in pull request #1929:
URL: https://github.com/apache/calcite/pull/1929#discussion_r510634360
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File path: core/src/main/java/org/apache/calcite/DataContext.java
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@@ -42,17 +44,17 @@
/**
* Returns a sub-schema with a given name, or null.
*/
- SchemaPlus getRootSchema();
+ @Nullable SchemaPlus getRootSchema();
/**
Review comment:
`javax.annotation.Nullable` does not support cases like
`List<javax.annotation.Nullable String>`
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