add get float64 func

get.go

@@ -1,8 +1,10 @@
 package postgresql
 
 import (
-	"github.com/volatiletech/null/v8"
 	"time"
+
+	"github.com/shopspring/decimal"
+	"github.com/volatiletech/null/v8"
 )
 
 func GetString(val null.String) string {
@@ -39,3 +41,8 @@ func GetJSON(val null.JSON) (res []byte) {
 	}
 	return val.JSON
 }
+
+// GetFloat64 ...
+func GetFloat64(val decimal.Decimal) float64 {
+	return val.InexactFloat64()
+}

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/Masterminds/squirrel v1.5.0
 	github.com/golang-migrate/migrate/v4 v4.15.2
 	github.com/jackc/pgx/v4 v4.17.0
+	github.com/shopspring/decimal v1.3.1
 	github.com/volatiletech/null/v8 v8.1.2
 	github.com/volatiletech/sqlboiler/v4 v4.12.0
 	go.uber.org/zap v1.23.0 // indirect

go.sum

@@ -1062,8 +1062,9 @@ github.com/seccomp/libseccomp-golang v0.9.1/go.mod h1:GbW5+tmTXfcxTToHLXlScSlAvW
 github.com/seccomp/libseccomp-golang v0.9.2-0.20210429002308-3879420cc921/go.mod h1:JA8cRccbGaA1s33RQf7Y1+q9gHmZX1yB/z9WDN1C6fg=
 github.com/shopspring/decimal v0.0.0-20180709203117-cd690d0c9e24/go.mod h1:M+9NzErvs504Cn4c5DxATwIqPbtswREoFCre64PpcG4=
 github.com/shopspring/decimal v0.0.0-20200227202807-02e2044944cc/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
-github.com/shopspring/decimal v1.2.0 h1:abSATXmQEYyShuxI4/vyW3tV1MrKAJzCZ/0zLUXYbsQ=
 github.com/shopspring/decimal v1.2.0/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
+github.com/shopspring/decimal v1.3.1 h1:2Usl1nmF/WZucqkFZhnfFYxxxu8LG21F6nPQBE5gKV8=
+github.com/shopspring/decimal v1.3.1/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/sirupsen/logrus v1.0.4-0.20170822132746-89742aefa4b2/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
 github.com/sirupsen/logrus v1.0.6/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=