Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/18142#discussion_r119012967 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala --- @@ -72,39 +89,53 @@ trait FunctionRegistry { class SimpleFunctionRegistry extends FunctionRegistry { - protected val functionBuilders = - StringKeyHashMap[(ExpressionInfo, FunctionBuilder)](caseSensitive = false) --- End diff -- This has a bug. The database name could be case sensitive.
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