first commit

internal/pkg/convertor/pgx.go

@@ -0,0 +1,18 @@
+package convertor
+
+import "github.com/jackc/pgx/v5/pgtype"
+
+func NumericToFloat64(num pgtype.Numeric) float64 {
+	if !num.Valid {
+		return 0
+	}
+	f1, err := num.Float64Value()
+	if err != nil {
+		return 0
+	}
+	f2, err := f1.Value()
+	if err != nil {
+		return 0
+	}
+	return f2.(float64)
+}