dongjoon-hyun commented on a change in pull request #28761:
URL: https://github.com/apache/spark/pull/28761#discussion_r466695536
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/orc/OrcFiltersBase.scala
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@@ -37,12 +40,44 @@ trait OrcFiltersBase {
}
/**
- * Return true if this is a searchable type in ORC.
- * Both CharType and VarcharType are cleaned at AstBuilder.
+ * This method returns a map which contains ORC field name and data type.
Each key
+ * 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. See
+ * `org.apache.spark.sql.connector.catalog.quote` for implementation details.
*/
- protected[sql] def isSearchableType(dataType: DataType) = dataType match {
- case BinaryType => false
- case _: AtomicType => true
- case _ => false
+ protected[sql] def getNameToOrcFieldMap(
Review comment:
1. `OrcField` looks a little mismatched because this function returns
`DataType` instead of a field.
2. According to the behavior of this function, this ignores BinaryType,
complexType, UserDefinedType. Also, function description doesn't mention the
limitation at all. In order to be more clear, we had better have `Searchable`
in the function name like the previous one (isSearchableType).
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