viirya commented on code in PR #16:
URL:
https://github.com/apache/spark-connect-swift/pull/16#discussion_r1994366213
##########
Sources/SparkConnect/DataFrame.swift:
##########
@@ -192,4 +192,38 @@ public actor DataFrame: Sendable {
print(table.render())
}
}
+
+ /// Projects a set of expressions and returns a new ``DataFrame``.
+ /// - Parameter cols: Column names
+ /// - Returns: A ``DataFrame`` with subset of columns.
+ public func select(_ cols: String...) -> DataFrame {
+ return DataFrame(spark: self.spark, plan:
SparkConnectClient.getProject(self.plan.root, cols))
+ }
+
+ /// Return a new ``DataFrame`` sorted by the specified column(s).
+ /// - Parameter cols: Column names.
+ /// - Returns: A sorted ``DataFrame``
+ public func sort(_ cols: String...) -> DataFrame {
+ return DataFrame(spark: self.spark, plan:
SparkConnectClient.getSort(self.plan.root, cols))
+ }
+
+ /// <#Description#>
+ /// - Parameter cols: <#cols description#>
+ /// - Returns: <#description#>
+ public func orderBy(_ cols: String...) -> DataFrame {
+ return DataFrame(spark: self.spark, plan:
SparkConnectClient.getSort(self.plan.root, cols))
+ }
+
+ /// Limits the result count to the number specified.
+ /// - Parameter n: Number of records to return. Will return this number of
records or all records if the ``DataFrame`` contains less than this number of
records.
+ /// - Returns: A subset of the records
+ public func limit(_ n: Int32) -> DataFrame {
+ return DataFrame(spark: self.spark, plan:
SparkConnectClient.getLimit(self.plan.root, n))
+ }
+
+ /// Chec if the ``DataFrame`` is empty and returns a boolean value.
Review Comment:
```suggestion
/// Checks if the ``DataFrame`` is empty and returns a boolean value.
```
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