Create 2024-10 - 2023-03 - Split nested Csv into dimensions.pq

Author: ninmonkey

forumQuestions/pq/2024-10 - 2023-03 - Split nested Csv into dimensions.pq

@@ -0,0 +1,32 @@
+let   
+    /*
+    input: (A,B), (A,B,C), D 
+    outputs the table:
+        [
+            { "Name": "A,B",    "Id":0 },
+            { "Name": "A,B,C",  "Id":1 },
+            { "Name": "D",      "Id":2 }
+        ]
+
+    */
+    SplitNestedNames = ( value ) as any => 
+        let            
+            delim = "),",
+            splitFunc = Splitter.SplitTextByDelimiter( delim, QuoteStyle.Csv ),
+            segments = splitFunc( value ),            
+            cleaned = List.Transform( segments, each Text.TrimStart( Text.Trim(_), "(" ) ),
+            unique = List.Sort( List.Distinct( cleaned ) ),
+            asTable = Table.FromList(
+                unique, Splitter.SplitByNothing(),
+                type table [ Name = text ], null, ExtraValues.Error ),
+                
+            indexed = Table.AddIndexColumn( asTable, "Id", 0, 1, Int64.Type )
+        in indexed,
+
+    string = "(A,B), (A,B,C), D ", // your column    
+    
+    asJson = Text.FromBinary( Json.FromValue( Final ) ),
+    
+    Final = SplitNestedNames( string )    
+in
+    Final