Simplify output sql format

Author: syucream

src/formatter/formatter.go

@@ -8,14 +8,14 @@ import (
 )
 
 const (
-	baseSql = "ALTER TABLE %s ADD CONSTRAINT %s_ibfk_%s%s FOREIGN KEY (%s) REFERENCES %s(%s);"
+	baseSql = "ALTER TABLE %s ADD CONSTRAINT FOREIGN KEY (%s) REFERENCES %s(%s);"
 )
 
 func FormatSql(constraints []constraint.Constraint) string {
 	var queries []string
 
 	for _, c := range constraints {
-		q := fmt.Sprintf(baseSql, c.Table, c.Table, c.ReferedTable, c.ReferedColumn, c.Column, c.ReferedTable, c.ReferedColumn)
+		q := fmt.Sprintf(baseSql, c.Table, c.Column, c.ReferedTable, c.ReferedColumn)
 		queries = append(queries, q)
 	}