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https://gitee.com/dromara/mayfly-go
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130 lines
3.6 KiB
Go
130 lines
3.6 KiB
Go
package sqlite
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import (
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"database/sql"
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"fmt"
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"mayfly-go/internal/db/dbm/dbi"
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"strings"
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"time"
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)
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type SqliteDialect struct {
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dbi.DefaultDialect
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dc *dbi.DbConn
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}
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func (sd *SqliteDialect) BatchInsert(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
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_, _ = sd.dc.Exec("PRAGMA foreign_keys = false")
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// 执行批量insert sql，跟mysql一样 支持批量insert语法
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// 生成占位符字符串：如：(?,?)
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// 重复字符串并用逗号连接
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repeated := strings.Repeat("?,", len(columns))
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// 去除最后一个逗号，占位符由括号包裹
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placeholder := fmt.Sprintf("(%s)", strings.TrimSuffix(repeated, ","))
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// 重复占位符字符串n遍
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repeated = strings.Repeat(placeholder+",", len(values))
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// 去除最后一个逗号
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placeholder = strings.TrimSuffix(repeated, ",")
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prefix := "insert into"
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if duplicateStrategy == 1 {
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prefix = "insert or ignore into"
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} else if duplicateStrategy == 2 {
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prefix = "insert or replace into"
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}
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sqlStr := fmt.Sprintf("%s %s (%s) values %s", prefix, sd.dc.GetMetaData().QuoteIdentifier(tableName), strings.Join(columns, ","), placeholder)
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// 把二维数组转为一维数组
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var args []any
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for _, v := range values {
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args = append(args, v...)
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}
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exec, err := sd.dc.TxExec(tx, sqlStr, args...)
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_, _ = sd.dc.Exec("PRAGMA foreign_keys = true;")
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// 执行批量insert sql
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return exec, err
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}
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func (sd *SqliteDialect) GetDataConverter() dbi.DataConverter {
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return converter
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}
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func (sd *SqliteDialect) CopyTable(copy *dbi.DbCopyTable) error {
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tableName := copy.TableName
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// 生成新表名,为老表明+_copy_时间戳
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newTableName := tableName + "_copy_" + time.Now().Format("20060102150405")
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ddl, err := sd.dc.GetMetaData().GetTableDDL(tableName)
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if err != nil {
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return err
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}
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// 生成建表语句
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// 替换表名
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ddl = strings.ReplaceAll(ddl, fmt.Sprintf("CREATE TABLE \"%s\"", tableName), fmt.Sprintf("CREATE TABLE \"%s\"", newTableName))
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// 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
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ddl = strings.ReplaceAll(ddl, fmt.Sprintf("CREATE INDEX \"%s", tableName), fmt.Sprintf("CREATE INDEX \"%s", newTableName))
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// 执行建表语句
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_, err = sd.dc.Exec(ddl)
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if err != nil {
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return err
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}
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// 使用异步线程插入数据
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if copy.CopyData {
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go func() {
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// 执行插入语句
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_, _ = sd.dc.Exec(fmt.Sprintf("INSERT INTO \"%s\" SELECT * FROM \"%s\"", newTableName, tableName))
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}()
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}
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return err
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}
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func (sd *SqliteDialect) ToCommonColumn(dialectColumn *dbi.Column) {
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// 翻译为通用数据库类型
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dataType := dialectColumn.DataType
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t1 := commonColumnTypeMap[string(dataType)]
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if t1 == "" {
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dialectColumn.DataType = dbi.CommonTypeVarchar
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dialectColumn.CharMaxLength = 2000
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} else {
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dialectColumn.DataType = t1
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}
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}
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func (sd *SqliteDialect) ToColumn(commonColumn *dbi.Column) {
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ctype := sqliteColumnTypeMap[commonColumn.DataType]
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if ctype == "" {
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commonColumn.DataType = "nvarchar"
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commonColumn.CharMaxLength = 2000
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}
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}
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func (sd *SqliteDialect) CreateTable(columns []dbi.Column, tableInfo dbi.Table, dropOldTable bool) (int, error) {
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sqlArr := sd.dc.GetMetaData().GenerateTableDDL(columns, tableInfo, dropOldTable)
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for _, sqlStr := range sqlArr {
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_, err := sd.dc.Exec(sqlStr)
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if err != nil {
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return 0, err
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}
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}
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return len(sqlArr), nil
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}
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func (sd *SqliteDialect) CreateIndex(tableInfo dbi.Table, indexs []dbi.Index) error {
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sqlArr := sd.dc.GetMetaData().GenerateIndexDDL(indexs, tableInfo)
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for _, sqlStr := range sqlArr {
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_, err := sd.dc.Exec(sqlStr)
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if err != nil {
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return err
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}
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}
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return nil
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}
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