extractor: enable numeric for multi table data format (#2977)

extractor/src/main/scala/com/digitalasset/extractor/writers/postgresql/Queries.scala

@@ -303,10 +303,7 @@ object Queries {
           )
         case V.ValueInt64(value) => Fragment("?", value)
         case V.ValueNumeric(value) =>
-          // FixMe: https://github.com/digital-asset/daml/issues/2289
-          //  For now all the ValueNumeric should have scale 10
-          //  Check this code once it is possible to create Numerics with different scale
-          Fragment("?::numeric(38,10)", value: BigDecimal)
+          Fragment(s"?::numeric(38,${value.scale})", value: BigDecimal)
         case V.ValueText(value) => Fragment("?", value)
         case ts @ V.ValueTimestamp(_) => Fragment("?", ts)
         case V.ValueParty(value) => Fragment("?", value: String)

extractor/src/test/resources/damls/PrimitiveTypes.daml

@@ -6,6 +6,9 @@ daml 1.2 module PrimitiveTypes where
 import DA.Date
 import DA.TextMap as TM
 
+-- FixMe: https://github.com/digital-asset/daml/issues/2289
+-- add test for Numerics once the compiler can produce them,
+
 template BasicPrimitiveTypes
   with
     reference: Text