If a primitive column is nullable, handle correctly

internal/core/gen.go

@@ -96,7 +96,11 @@ func jdbcSet(t ktType, idx int, name string) string {
 if t.IsUUID() {
 return fmt.Sprintf("stmt.setObject(%d, %s)", idx, name)
 }
-return fmt.Sprintf("stmt.set%s(%d, %s)", t.Name, idx, name)
+if t.IsNull && t.PrimitiveType != "" {
+return fmt.Sprintf("if (%[3]s != null) stmt.set%[1]s(%[2]d, %[3]s) else stmt.setNull(%[2]d, Types.%[4]s)", t.Name, idx, name, t.PrimitiveType)
+} else {
+return fmt.Sprintf("stmt.set%s(%d, %s)", t.Name, idx, name)
+}
 }
 
 type Params struct {
@@ -320,12 +324,13 @@ func BuildDataClasses(conf Config, req *plugin.GenerateRequest) []Struct {
 }
 
 type ktType struct {
-Name string
-IsEnum bool
-IsArray bool
-IsNull bool
-DataType string
-Engine string
+Name string
+IsEnum bool
+IsArray bool
+IsNull bool
+PrimitiveType string
+DataType string
+Engine string
 }
 
 func (t ktType) String() string {
@@ -374,12 +379,13 @@ func (t ktType) IsBigDecimal() bool {
 func makeType(req *plugin.GenerateRequest, col *plugin.Column) ktType {
 typ, isEnum := ktInnerType(req, col)
 return ktType{
-Name: typ,
-IsEnum: isEnum,
-IsArray: col.IsArray,
-IsNull: !col.NotNull,
-DataType: sdk.DataType(col.Type),
-Engine: req.Settings.Engine,
+Name: typ,
+IsEnum: isEnum,
+IsArray: col.IsArray,
+IsNull: !col.NotNull,
+PrimitiveType: ktPrimitiveType(typ),
+DataType: sdk.DataType(col.Type),
+Engine: req.Settings.Engine,
 }
 }
 
@@ -395,6 +401,25 @@ func ktInnerType(req *plugin.GenerateRequest, col *plugin.Column) (string, bool)
 }
 }
 
+func ktPrimitiveType(t string) string {
+switch t {
+case "Int":
+return "INTEGER"
+case "Double":
+return "DOUBLE"
+case "Long":
+return "BIGINT"
+case "Short":
+return "SMALLINT"
+case "Float":
+return "REAL"
+case "Boolean":
+return "BOOLEAN"
+default:
+return ""
+}
+}
+
 type goColumn struct {
 id int
 *plugin.Column