feat: add string_agg aggregate function (#297)

substrait-io · Sep 5, 2022 · fbe5e09 · fbe5e09
1 parent c47fffa
commit fbe5e09
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/extensions/functions_string.yaml b/extensions/functions_string.yaml
@@ -1263,3 +1263,19 @@ scalar_functions:
           - value: i32
             name: "count"
         return: "string"
+
+aggregate_functions:
+
+  -
+    name: string_agg
+    description: Concatenates a column of string values with a separator.
+    impls:
+      - args:
+          - value: "string"
+            name: "input"
+            description: "Column of string values."
+          - value: "string"
+            name: "separator"
+            constant: true
+            description: "Separator for concatenated strings"
+        return: "string"