libenchao commented on code in PR #2918:
URL: https://github.com/apache/calcite/pull/2918#discussion_r981219448
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core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java:
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@@ -235,8 +235,11 @@ public class SqlValidatorImpl implements
SqlValidatorWithHints {
private int nextGeneratedId;
protected final RelDataTypeFactory typeFactory;
-
- /** The type of dynamic parameters until a type is imposed on them. */
+ /**
+ * The type of dynamic parameters until a type is imposed on them.
+ * It is assumed that dynamic parameter is nullable.
+ * See {@link #inferUnknownTypes(RelDataType, SqlValidatorScope, SqlNode)}
Review Comment:
The new comment looks good.
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