sql-builder/db/build.go

package db

import (
	"fmt"
	"strings"

	"git.botann.com/lijun/sql-builder/util"
)

func (s *SqlBuilder[T]) buildSql() string {
	s.DeletePlaceholderSymbol()
	return s.Sql
}

func (s *SqlBuilder[T]) buildPaginateSql(sqls string) string {
	s.Opts.Page.Init()
	pageIndex := s.Opts.Page.GetPageIndex()
	pageSize := s.Opts.Page.GetPageSize()
	return fmt.Sprintf("%s limit %d offset %d", sqls, pageSize, (pageIndex-1)*pageSize)
}

func (s *SqlBuilder[T]) buildCountSql(sqls string) string {
	return fmt.Sprintf("select count(1) from (%s) as t", sqls)
}

func (s *SqlBuilder[T]) buildSelect(selects ...string) {
	for _, v := range selects {
		s.Sql = strings.Replace(s.Sql, util.SelectPlaceholder, fmt.Sprintf(",%s", v), 1)
	}
}

func (s *SqlBuilder[T]) buildCondition(conds ...string) {
	for _, v := range conds {
		s.Sql = strings.Replace(s.Sql, util.ConditionPlaceholder, fmt.Sprintf(" and %s", v), 1)
	}
}

func (s *SqlBuilder[T]) buildGroup(groups ...string) {
	for _, v := range groups {
		s.Sql = strings.Replace(s.Sql, util.GroupPlaceholder, fmt.Sprintf(",%s", v), 1)
	}
}

func (s *SqlBuilder[T]) buildOrder(orders ...string) {
	for _, v := range orders {
		s.Sql = strings.Replace(s.Sql, util.OrderPlaceholder, fmt.Sprintf(",%s", v), 1)
	}
}

// tdengine专用
func (s *SqlBuilder[T]) buildPartition(partitions ...string) {
	for _, v := range partitions {
		s.Sql = strings.Replace(s.Sql, util.PartitionPlaceholder, fmt.Sprintf(",%s", v), 1)
	}
}

func (s *SqlBuilder[T]) DeletePlaceholderSymbol() {
	s.Sql = strings.Replace(s.Sql, util.SelectPlaceholder, "", -1)
	s.Sql = strings.Replace(s.Sql, util.ConditionPlaceholder, "", -1)
	s.Sql = strings.Replace(s.Sql, util.GroupPlaceholder, "", -1)
	s.Sql = strings.Replace(s.Sql, util.OrderPlaceholder, "", -1)
	s.Sql = strings.Replace(s.Sql, util.PartitionPlaceholder, "", -1)
}