Fix arithmetic overflow in sqlserver input (influxdata#5261)

Author: schwartzmx

plugins/inputs/sqlserver/sqlserver.go

@@ -2097,10 +2097,10 @@ SELECT
 -- value
 , value = CAST(CASE cc.cntr_type
     When 65792 Then cc.cntr_value -- Count
-    When 537003264 Then IsNull(Cast(cc.cntr_value as Money) / NullIf(cbc.cntr_value, 0), 0) -- Ratio
+    When 537003264 Then IsNull(Cast(cc.cntr_value as decimal(19,4)) / NullIf(cbc.cntr_value, 0), 0) -- Ratio
     When 272696576 Then cc.cntr_value - pc.cntr_value -- Per Second
-    When 1073874176 Then IsNull(Cast(cc.cntr_value - pc.cntr_value as Money) / NullIf(cbc.cntr_value - pbc.cntr_value, 0), 0) -- Avg
-    When 272696320 Then IsNull(Cast(cc.cntr_value - pc.cntr_value as Money) / NullIf(cbc.cntr_value - pbc.cntr_value, 0), 0) -- Avg/sec
+    When 1073874176 Then IsNull(Cast(cc.cntr_value - pc.cntr_value as decimal(19,4)) / NullIf(cbc.cntr_value - pbc.cntr_value, 0), 0) -- Avg
+    When 272696320 Then IsNull(Cast(cc.cntr_value - pc.cntr_value as decimal(19,4)) / NullIf(cbc.cntr_value - pbc.cntr_value, 0), 0) -- Avg/sec
     When 1073939712 Then cc.cntr_value - pc.cntr_value -- Base
     Else cc.cntr_value End as bigint)
 --, currentvalue= CAST(cc.cntr_value as bigint)