feat: add variance function (#263)

substrait-io · Jul 28, 2022 · b6c3772 · b6c3772
1 parent de64a3c
commit b6c3772
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/extensions/functions_arithmetic.yaml b/extensions/functions_arithmetic.yaml
@@ -725,6 +725,23 @@ aggregate_functions:
           - value: fp64
         nullability: DECLARED_OUTPUT
         return: fp64?
+  - name: "variance"
+    description: Calculates variance for a set of values.
+    impls:
+      - args:
+          - name: rounding
+            options: [ TIE_TO_EVEN, TIE_AWAY_FROM_ZERO, TRUNCATE, CEILING, FLOOR ]
+            required: false
+          - value: fp32
+        nullability: DECLARED_OUTPUT
+        return: fp32?
+      - args:
+          - name: rounding
+            options: [ TIE_TO_EVEN, TIE_AWAY_FROM_ZERO, TRUNCATE, CEILING, FLOOR ]
+            required: false
+          - value: fp64
+        nullability: DECLARED_OUTPUT
+        return: fp64?
 window_functions:
   - name: "row_number"
     description: "the number of the current row within its partition."