From d5c2980bb18a34e9bc9ce0b88ff11a6e08e48dde Mon Sep 17 00:00:00 2001
From: Paul Trowbridge <paul@hptrow.me>
Date: Tue, 12 Apr 2022 02:09:36 -0400
Subject: [PATCH] isolate price change on no volume adjustment

---
 routes/scale/gen_scale.sql | 35 +++++++++++++++++++++++++----------
 1 file changed, 25 insertions(+), 10 deletions(-)

diff --git a/routes/scale/gen_scale.sql b/routes/scale/gen_scale.sql
index 0c42473..1812d9c 100644
--- a/routes/scale/gen_scale.sql
+++ b/routes/scale/gen_scale.sql
@@ -208,15 +208,30 @@ WHERE
     SELECT * FROM baseline WHERE (SELECT COUNT(*) FROM volume_only) = 0
 )
 ,pscale AS (
-    ----what if the selection has several value columns, which one to use?-----
-    SELECT
-        (SELECT pincr FROM target) AS target_increment
-        ,sum("Amount") AS value
-        ,CASE WHEN (SELECT vscale.
-        ((SELECT pincr FROM target)-(SELECT sum("Amount") FROM volume))/(SELECT sum("Amount") FROM volume)
-        ,CASE WHEN (SELECT sum("Amount") FROM volume) = 0 THEN 0 ELSE (SELECT pincr FROM target)/sum("Amount") FROM volume END factor
-    FROM
-        volume
+SELECT
+    (SELECT pincr FROM target) AS target_increment
+    ,sum($$||format('%I',_value_col)||') AS value'||$$
+    ,CASE WHEN (SELECT sum($$||format('%I',_value_col)||$$) FROM volume) = 0 THEN
+        --if the base value is -0- scaling will not work, need to generate price, factor goes to -0-
+        0
+    ELSE
+        --expects inbound partial adjustment from volume table
+        --if the volume table does not have enough price added, need to get to goal increment
+        --multiplying by the raw factor without adding 1 will work since this data set will be added to the volume data set
+        ((SELECT pincr FROM target)-(SELECT sum($$||format('%I',_value_col)||$$) FROM volume))/(SELECT sum($$||format('%I',_value_col)||$$) FROM volume)
+    END factor
+    ,CASE WHEN (SELECT sum($$||format('%I',_value_col)||$$) FROM volume) = 0 THEN
+        CASE WHEN ((SELECT pincr::numeric FROM target) - (SELECT sum($$||format('%I',_value_col)||$$) FROM volume)) <> 0 THEN
+            --if the base value is -0- but the target value hasn't been achieved, derive a price to apply
+            ((SELECT pincr::numeric FROM target) - (SELECT sum($$||format('%I',_value_col)||$$) FROM volume))/(SELECT sum($$||format('%I',_units_col)||$$) FROM volume)
+        ELSE
+            0
+        END
+    ELSE
+        0
+    END mod_price
+FROM
+    volume
 )
 ,pricing AS (
 SELECT
@@ -232,7 +247,7 @@ INSERT INTO
 SELECT 
     * 
 FROM 
-    volume 
+    volume_only
 UNION ALL 
 SELECT 
     *