abhishekagarwal87 commented on a change in pull request #12092:
URL: https://github.com/apache/druid/pull/12092#discussion_r782784383
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File path: sql/src/main/java/org/apache/druid/sql/calcite/planner/Calcites.java
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@@ -173,6 +173,8 @@ public static ColumnType
getValueTypeForRelDataTypeFull(final RelDataType type)
return ColumnType.LONG_ARRAY;
}
return ColumnType.STRING_ARRAY;
+ } else if (sqlTypeName == SqlTypeName.NULL) {
+ return ColumnType.STRING;
Review comment:
Correction - RowSignature allows non-null column type. The exception is
thrown during the conversion of signature from calcite type to druid type.
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