viirya commented on a change in pull request #32807:
URL: https://github.com/apache/spark/pull/32807#discussion_r648019398
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/sources/filters.scala
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@@ -35,8 +35,9 @@ sealed abstract class Filter {
/**
* List of columns that are referenced by this filter.
*
- * Note that, each element in `references` represents a column; `dots` are
used as separators
- * for nested columns. If any part of the names contains `dots`, it is
quoted to avoid confusion.
+ * Note that, each element in `references` represents a column. The column
name follows ANSI SQL
+ * names and identifiers: dots are used as separators for nested columns,
name will be quoted if
+ * it contains special chars.
Review comment:
So it extends the coverage of quoted name (originally it is only for
non-separator dots)?
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