io.delta.sql.parser
Fork from org.apache.spark.sql.catalyst.parser.PostProcessor.
org.apache.spark.sql.catalyst.parser.PostProcessor
https://github.com/apache/spark/blob/v2.4.4/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/ParseDriver.scala#L248
Treat non-reserved keywords as Identifiers.
Remove the back ticks from an Identifier.
Fork from
org.apache.spark.sql.catalyst.parser.PostProcessor
.https://github.com/apache/spark/blob/v2.4.4/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/ParseDriver.scala#L248