fix #1806 (#1833)

* fix #1806

* chore: refine error text

tools/goctl/model/sql/parser/parser.go

@@ -69,7 +69,6 @@ func Parse(filename, database string) ([]*Table, error) {
 	}
 
 	nameOriginals := parseNameOriginal(tables)
-
 	indexNameGen := func(column ...string) string {
 		return strings.Join(column, "_")
 	}
@@ -77,14 +76,12 @@ func Parse(filename, database string) ([]*Table, error) {
 	prefix := filepath.Base(filename)
 	var list []*Table
 	for indexTable, e := range tables {
-		columns := e.Columns
-
 		var (
+			primaryColumn    string
 			primaryColumnSet = collection.NewSet()
-
-			primaryColumn string
-			uniqueKeyMap  = make(map[string][]string)
-			normalKeyMap  = make(map[string][]string)
+			uniqueKeyMap     = make(map[string][]string)
+			normalKeyMap     = make(map[string][]string)
+			columns          = e.Columns
 		)
 
 		for _, column := range columns {