rdblue commented on a change in pull request #27728: [SPARK-17636][SQL] Nested
Column Predicate Pushdown for Parquet
URL: https://github.com/apache/spark/pull/27728#discussion_r386594772
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/CatalogV2Implicits.scala
##########
@@ -132,4 +132,9 @@ private[sql] object CatalogV2Implicits {
part
}
}
+
+ def unqote(input: String): Seq[String] = {
+ // TODO: Handle the column name contains `dot` properly
+ input.split('.')
Review comment:
You can copy how this is done in
[`LogicalExpressions`](https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/connector/expressions/expressions.scala#L32-L34).
```scala
val parser = new CatalystSqlParser(SQLConf.get)
val nameParts = parser.parseMultipartIdentifier(name)
```
You can also use the `parseReference` method if you want to get a
`FieldReference`.
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