Removing remaining instances of GetReplica/GetMaster (#19773)

```release-note
NONE
```

store/sqlstore/channel_store_categories.go

@@ -435,7 +435,6 @@ func (s SqlChannelStore) completePopulatingCategoryChannelsT(db dbSelecter, cate
 }
 
 func (s SqlChannelStore) GetSidebarCategory(categoryId string) (*model.SidebarCategoryWithChannels, error) {
-	var categories []*sidebarCategoryForJoin
 	sql, args, err := s.getQueryBuilder().
 		Select("SidebarCategories.*", "SidebarChannels.ChannelId").
 		From("SidebarCategories").
@@ -446,7 +445,8 @@ func (s SqlChannelStore) GetSidebarCategory(categoryId string) (*model.SidebarCa
 		return nil, errors.Wrap(err, "sidebar_category_tosql")
 	}
 
-	if _, err = s.GetReplica().Select(&categories, sql, args...); err != nil {
+	categories := []*sidebarCategoryForJoin{}
+	if err = s.GetReplicaX().Select(&categories, sql, args...); err != nil {
 		return nil, store.NewErrNotFound("SidebarCategories", categoryId)
 	}
 

store/sqlstore/post_store.go

@@ -1498,34 +1498,36 @@ func (s *SqlPostStore) getParentsPosts(channelId string, offset int, limit int,
 	if len(roots) == 0 {
 		return nil, nil
 	}
-	// TODO: convert to squirrel HW
-	params := make(map[string]interface{})
-	placeholders := make([]string, len(roots))
-	for idx, r := range roots {
-		key := fmt.Sprintf(":Root%v", idx)
-		params[key[1:]] = r
-		placeholders[idx] = key
-	}
-	placeholderString := strings.Join(placeholders, ", ")
-	params["ChannelId"] = channelId
-	replyCountQuery := ""
-	whereStatement := "p.Id IN (" + placeholderString + ")"
+
+	cols := []string{"p.*"}
+	var where sq.Sqlizer
+	where = sq.Eq{"p.Id": roots}
 	if skipFetchThreads {
-		replyCountQuery = `, (SELECT COUNT(*) FROM Posts WHERE Posts.RootId = (CASE WHEN p.RootId = '' THEN p.Id ELSE p.RootId END) AND Posts.DeleteAt = 0) as ReplyCount`
+		cols = append(cols, "(SELECT COUNT(*) FROM Posts WHERE Posts.RootId = (CASE WHEN p.RootId = '' THEN p.Id ELSE p.RootId END) AND Posts.DeleteAt = 0) as ReplyCount")
 	} else {
-		whereStatement += " OR p.RootId IN (" + placeholderString + ")"
+		where = sq.Or{
+			where,
+			sq.Eq{"p.RootId": roots},
+		}
 	}
-	var posts []*model.Post
-	_, err = s.GetReplica().Select(&posts, `
-		SELECT p.*`+replyCountQuery+`
-		FROM
-			Posts p
-		WHERE
-			(`+whereStatement+`)
-				AND ChannelId = :ChannelId
-				AND DeleteAt = 0
-		ORDER BY CreateAt`,
-		params)
+
+	query := s.getQueryBuilder().
+		Select(cols...).
+		From("Posts p").
+		Where(sq.And{
+			where,
+			sq.Eq{"ChannelId": channelId},
+			sq.Eq{"DeleteAt": 0},
+		}).
+		OrderBy("CreateAt")
+
+	sql, args, err := query.ToSql()
+	if err != nil {
+		return nil, errors.Wrap(err, "ParentPosts_Tosql")
+	}
+
+	posts := []*model.Post{}
+	err = s.GetReplicaX().Select(&posts, sql, args...)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to find Posts")
 	}

store/sqlstore/sqlx_wrapper.go

@@ -74,6 +74,10 @@ func newSqlxDBWrapper(db *sqlx.DB, timeout time.Duration, trace bool) *sqlxDBWra
 	}
 }
 
+func (w *sqlxDBWrapper) Stats() sql.DBStats {
+	return w.DB.Stats()
+}
+
 func (w *sqlxDBWrapper) Beginx() (*sqlxTxWrapper, error) {
 	tx, err := w.DB.Beginx()
 	if err != nil {

store/sqlstore/store.go

@@ -376,7 +376,8 @@ func (ss *SqlStore) GetDbVersion(numerical bool) (string, error) {
 		return "", errors.New("Not supported driver")
 	}
 
-	version, err := ss.GetReplica().SelectStr(sqlVersion)
+	var version string
+	err := ss.GetReplicaX().Get(&version, sqlVersion)
 	if err != nil {
 		return "", err
 	}
@@ -459,7 +460,7 @@ func (ss *SqlStore) GetReplicaX() *sqlxDBWrapper {
 }
 
 func (ss *SqlStore) TotalMasterDbConnections() int {
-	return ss.GetMaster().Db.Stats().OpenConnections
+	return ss.GetMasterX().Stats().OpenConnections
 }
 
 // ReplicaLagAbs queries all the replica databases to get the absolute replica lag value

store/sqlstore/user_store.go

@@ -2074,8 +2074,8 @@ func (us SqlUserStore) GetUsersWithInvalidEmails(page int, perPage int, restrict
 		return nil, errors.Wrap(err, "users_get_many_tosql")
 	}
 
-	var users []*model.User
-	if _, err := us.GetReplica().Select(&users, queryString, args...); err != nil {
+	users := []*model.User{}
+	if err := us.GetReplicaX().Select(&users, queryString, args...); err != nil {
 		return nil, errors.Wrap(err, "users_get_many_select")
 	}