mirror of
https://gitee.com/dromara/mayfly-go
synced 2025-11-04 08:20:25 +08:00
135 lines
3.9 KiB
Go
135 lines
3.9 KiB
Go
package sqlite
|
||
|
||
import (
|
||
"database/sql"
|
||
"fmt"
|
||
"mayfly-go/internal/db/dbm/dbi"
|
||
"mayfly-go/pkg/utils/anyx"
|
||
"regexp"
|
||
"strings"
|
||
"time"
|
||
)
|
||
|
||
type SqliteDialect struct {
|
||
dc *dbi.DbConn
|
||
}
|
||
|
||
func (sd *SqliteDialect) GetMetaData() dbi.MetaData {
|
||
return &SqliteMetaData{dc: sd.dc}
|
||
}
|
||
|
||
// GetDbProgram 获取数据库程序模块，用于数据库备份与恢复
|
||
func (sd *SqliteDialect) GetDbProgram() (dbi.DbProgram, error) {
|
||
return nil, fmt.Errorf("该数据库类型不支持数据库备份与恢复: %v", sd.dc.Info.Type)
|
||
}
|
||
|
||
func (sd *SqliteDialect) BatchInsert(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
|
||
// 执行批量insert sql，跟mysql一样 支持批量insert语法
|
||
// 生成占位符字符串：如：(?,?)
|
||
// 重复字符串并用逗号连接
|
||
repeated := strings.Repeat("?,", len(columns))
|
||
// 去除最后一个逗号，占位符由括号包裹
|
||
placeholder := fmt.Sprintf("(%s)", strings.TrimSuffix(repeated, ","))
|
||
|
||
// 重复占位符字符串n遍
|
||
repeated = strings.Repeat(placeholder+",", len(values))
|
||
// 去除最后一个逗号
|
||
placeholder = strings.TrimSuffix(repeated, ",")
|
||
|
||
prefix := "insert into"
|
||
if duplicateStrategy == 1 {
|
||
prefix = "insert or ignore into"
|
||
} else if duplicateStrategy == 2 {
|
||
prefix = "insert or replace into"
|
||
}
|
||
|
||
sqlStr := fmt.Sprintf("%s %s (%s) values %s", prefix, sd.dc.Info.Type.QuoteIdentifier(tableName), strings.Join(columns, ","), placeholder)
|
||
|
||
// 把二维数组转为一维数组
|
||
var args []any
|
||
for _, v := range values {
|
||
args = append(args, v...)
|
||
}
|
||
|
||
// 执行批量insert sql
|
||
return sd.dc.TxExec(tx, sqlStr, args...)
|
||
}
|
||
|
||
func (sd *SqliteDialect) GetDataConverter() dbi.DataConverter {
|
||
return converter
|
||
}
|
||
|
||
var (
|
||
// 数字类型
|
||
numberRegexp = regexp.MustCompile(`(?i)int|double|float|number|decimal|byte|bit|real`)
|
||
// 日期时间类型
|
||
datetimeRegexp = regexp.MustCompile(`(?i)datetime`)
|
||
|
||
converter = new(DataConverter)
|
||
)
|
||
|
||
type DataConverter struct {
|
||
}
|
||
|
||
func (dc *DataConverter) GetDataType(dbColumnType string) dbi.DataType {
|
||
if numberRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeNumber
|
||
}
|
||
if datetimeRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeDateTime
|
||
}
|
||
return dbi.DataTypeString
|
||
}
|
||
|
||
func (dc *DataConverter) FormatData(dbColumnValue any, dataType dbi.DataType) string {
|
||
str := anyx.ToString(dbColumnValue)
|
||
switch dataType {
|
||
case dbi.DataTypeDateTime: // "2024-01-02T22:08:22.275697+08:00"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.DateTime)
|
||
case dbi.DataTypeDate: // "2024-01-02T00:00:00+08:00"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.DateOnly)
|
||
case dbi.DataTypeTime: // "0000-01-01T22:08:22.275688+08:00"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.TimeOnly)
|
||
}
|
||
return str
|
||
}
|
||
|
||
func (dc *DataConverter) ParseData(dbColumnValue any, dataType dbi.DataType) any {
|
||
return dbColumnValue
|
||
}
|
||
|
||
func (sd *SqliteDialect) CopyTable(copy *dbi.DbCopyTable) error {
|
||
tableName := copy.TableName
|
||
|
||
// 生成新表名,为老表明+_copy_时间戳
|
||
newTableName := tableName + "_copy_" + time.Now().Format("20060102150405")
|
||
ddl, err := sd.GetMetaData().GetTableDDL(tableName)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
// 生成建表语句
|
||
// 替换表名
|
||
ddl = strings.ReplaceAll(ddl, fmt.Sprintf("CREATE TABLE \"%s\"", tableName), fmt.Sprintf("CREATE TABLE \"%s\"", newTableName))
|
||
// 替换索引名，索引名为按照规范生成的，才能替换，否则未知索引名，无法替换
|
||
ddl = strings.ReplaceAll(ddl, fmt.Sprintf("CREATE INDEX \"%s", tableName), fmt.Sprintf("CREATE INDEX \"%s", newTableName))
|
||
|
||
// 执行建表语句
|
||
_, err = sd.dc.Exec(ddl)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
// 使用异步线程插入数据
|
||
if copy.CopyData {
|
||
go func() {
|
||
// 执行插入语句
|
||
_, _ = sd.dc.Exec(fmt.Sprintf("INSERT INTO \"%s\" SELECT * FROM \"%s\"", newTableName, tableName))
|
||
}()
|
||
}
|
||
|
||
return err
|
||
}
|