mirror of
https://gitee.com/dromara/mayfly-go
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454 lines
15 KiB
Go
454 lines
15 KiB
Go
package mssql
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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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"mayfly-go/pkg/logx"
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"mayfly-go/pkg/utils/anyx"
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"mayfly-go/pkg/utils/collx"
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"strings"
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"time"
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)
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type MssqlDialect struct {
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dc *dbi.DbConn
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}
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// 从连接信息中获取数据库和schema信息
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func (md *MssqlDialect) currentSchema() string {
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dbName := md.dc.Info.Database
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schema := ""
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arr := strings.Split(dbName, "/")
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if len(arr) == 2 {
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schema = arr[1]
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}
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return schema
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}
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// GetDbProgram 获取数据库程序模块，用于数据库备份与恢复
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func (md *MssqlDialect) GetDbProgram() (dbi.DbProgram, error) {
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return nil, fmt.Errorf("该数据库类型不支持数据库备份与恢复: %v", md.dc.Info.Type)
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}
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func (md *MssqlDialect) BatchInsert(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
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if duplicateStrategy == dbi.DuplicateStrategyUpdate {
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return md.batchInsertMerge(tx, tableName, columns, values, duplicateStrategy)
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}
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return md.batchInsertSimple(tx, tableName, columns, values, duplicateStrategy)
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}
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func (md *MssqlDialect) batchInsertSimple(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
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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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var singleSize int // 一条数据的参数个数
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for i, v := range values {
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if i == 0 {
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singleSize = len(v)
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}
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args = append(args, v...)
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}
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// 判断如果参数超过2000，则分批次执行，mssql允许最大参数为2100，保险起见，这里限制到2000
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if len(args) > 2000 {
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rows := 2000 / singleSize // 每批次最大数据条数
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mp := make(map[any][][]any)
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// 把values拆成多份，每份不能超过rows条
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length := len(values)
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for i := 0; i < length; i += rows {
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if i+rows <= length {
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mp[i] = values[i : i+rows]
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} else {
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mp[i] = values[i:length]
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}
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}
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var count int64
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for _, v := range mp {
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res, err := md.batchInsertSimple(tx, tableName, columns, v, duplicateStrategy)
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if err != nil {
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return count, err
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}
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count += res
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}
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return count, nil
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}
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msMetadata := md.dc.GetMetaData()
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schema := md.dc.Info.CurrentSchema()
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ignoreDupSql := ""
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if duplicateStrategy == dbi.DuplicateStrategyIgnore {
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// ALTER TABLE dbo.TEST ADD CONSTRAINT uniqueRows UNIQUE (ColA, ColB, ColC, ColD) WITH (IGNORE_DUP_KEY = ON)
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indexs, _ := msMetadata.MetaData.(*MssqlMetaData).getTableIndexWithPK(tableName)
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// 收集唯一索引涉及到的字段
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uniqueColumns := make([]string, 0)
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for _, index := range indexs {
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if index.IsUnique {
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cols := strings.Split(index.ColumnName, ",")
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for _, col := range cols {
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if !collx.ArrayContains(uniqueColumns, col) {
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uniqueColumns = append(uniqueColumns, col)
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}
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}
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}
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}
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if len(uniqueColumns) > 0 {
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// 设置忽略重复键
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ignoreDupSql = fmt.Sprintf("ALTER TABLE %s.%s ADD CONSTRAINT uniqueRows UNIQUE (%s) WITH (IGNORE_DUP_KEY = {sign})", schema, tableName, strings.Join(uniqueColumns, ","))
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_, _ = md.dc.TxExec(tx, strings.ReplaceAll(ignoreDupSql, "{sign}", "ON"))
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}
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}
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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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baseTable := fmt.Sprintf("%s.%s", msMetadata.QuoteIdentifier(schema), msMetadata.QuoteIdentifier(tableName))
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sqlStr := fmt.Sprintf("insert into %s (%s) values %s", baseTable, strings.Join(columns, ","), placeholder)
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// 执行批量insert sql
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// 设置允许填充自增列之后，显示指定列名可以插入自增列
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identityInsertOn := fmt.Sprintf("SET IDENTITY_INSERT [%s].[%s] ON", schema, tableName)
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res, err := md.dc.TxExec(tx, fmt.Sprintf("%s %s", identityInsertOn, sqlStr), args...)
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// 执行完之后，设置忽略重复键
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if ignoreDupSql != "" {
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_, _ = md.dc.TxExec(tx, strings.ReplaceAll(ignoreDupSql, "{sign}", "OFF"))
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}
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return res, err
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}
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func (md *MssqlDialect) batchInsertMerge(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
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msMetadata := md.dc.GetMetaData()
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schema := md.dc.Info.CurrentSchema()
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// 收集MERGE 语句的 ON 子句条件
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caseSqls := make([]string, 0)
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pkCols := make([]string, 0)
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// 查询取出自增列字段, merge update不能修改自增列
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identityCols := make([]string, 0)
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cols, err := msMetadata.GetColumns(tableName)
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for _, col := range cols {
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if col.IsIdentity {
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identityCols = append(identityCols, col.ColumnName)
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}
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if col.IsPrimaryKey {
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pkCols = append(pkCols, col.ColumnName)
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name := msMetadata.QuoteIdentifier(col.ColumnName)
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caseSqls = append(caseSqls, fmt.Sprintf(" T1.%s = T2.%s ", name, name))
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}
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}
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if len(pkCols) == 0 {
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return md.batchInsertSimple(tx, tableName, columns, values, duplicateStrategy)
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}
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// 重复数据处理策略
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insertVals := make([]string, 0)
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upds := make([]string, 0)
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insertCols := make([]string, 0)
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// 源数据占位sql
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phs := make([]string, 0)
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for _, column := range columns {
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if !collx.ArrayContains(identityCols, msMetadata.RemoveQuote(column)) {
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upds = append(upds, fmt.Sprintf("T1.%s = T2.%s", column, column))
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}
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insertCols = append(insertCols, fmt.Sprintf("%s", column))
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insertVals = append(insertVals, fmt.Sprintf("T2.%s", column))
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phs = append(phs, fmt.Sprintf("? %s", column))
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}
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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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tmp := fmt.Sprintf("select %s", strings.Join(phs, ","))
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t2s := make([]string, 0)
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for _, v := range values {
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args = append(args, v...)
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t2s = append(t2s, tmp)
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}
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t2 := strings.Join(t2s, " UNION ALL ")
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sqlTemp := "MERGE INTO " + msMetadata.QuoteIdentifier(schema) + "." + msMetadata.QuoteIdentifier(tableName) + " T1 USING (" + t2 + ") T2 ON " + strings.Join(caseSqls, " AND ")
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sqlTemp += "WHEN NOT MATCHED THEN INSERT (" + strings.Join(insertCols, ",") + ") VALUES (" + strings.Join(insertVals, ",") + ") "
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sqlTemp += "WHEN MATCHED THEN UPDATE SET " + strings.Join(upds, ",")
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// 设置允许填充自增列之后，显示指定列名可以插入自增列
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identityInsertOn := fmt.Sprintf("SET IDENTITY_INSERT [%s].[%s] ON", schema, tableName)
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// 执行merge sql,必须要以分号结尾
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res, err := md.dc.TxExec(tx, fmt.Sprintf("%s %s;", identityInsertOn, sqlTemp), args...)
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if err != nil {
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logx.Errorf("执行sql失败：%s, sql: [ %s ]", err.Error(), sqlTemp)
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}
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return res, err
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}
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func (md *MssqlDialect) CopyTable(copy *dbi.DbCopyTable) error {
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msMetadata := md.dc.GetMetaData().MetaData.(*MssqlMetaData)
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schema := md.dc.Info.CurrentSchema()
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// 生成新表名,为老表明+_copy_时间戳
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newTableName := copy.TableName + "_copy_" + time.Now().Format("20060102150405")
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// 复制建表语句
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ddl, err := msMetadata.CopyTableDDL(copy.TableName, newTableName)
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if err != nil {
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return err
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}
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// 执行建表
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_, err = md.dc.Exec(ddl)
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if err != nil {
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return err
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}
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// 复制数据
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if copy.CopyData {
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go func() {
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// 查询所有的列
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columns, err := msMetadata.GetColumns(copy.TableName)
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if err != nil {
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logx.Warnf("复制表[%s]数据失败: %s", copy.TableName, err.Error())
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return
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}
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// 取出每列名, 需要显示指定列名插入数据
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columnNames := make([]string, 0)
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hasIdentity := false
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for _, v := range columns {
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columnNames = append(columnNames, fmt.Sprintf("[%s]", v.ColumnName))
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if v.IsIdentity {
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hasIdentity = true
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}
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}
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columnsSql := strings.Join(columnNames, ",")
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// 复制数据
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// 设置允许填充自增列之后，显示指定列名可以插入自增列
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identityInsertOn := ""
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if hasIdentity {
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identityInsertOn = fmt.Sprintf("SET IDENTITY_INSERT [%s].[%s] ON", schema, newTableName)
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}
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_, err = md.dc.Exec(fmt.Sprintf(" %s INSERT INTO [%s].[%s] (%s) SELECT * FROM [%s].[%s]", identityInsertOn, schema, newTableName, columnsSql, schema, copy.TableName))
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if err != nil {
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logx.Warnf("复制表[%s]数据失败: %s", copy.TableName, err.Error())
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}
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}()
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}
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return err
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}
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func (md *MssqlDialect) TransColumns(columns []dbi.Column) []dbi.Column {
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var commonColumns []dbi.Column
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for _, column := range columns {
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// 取出当前数据库类型
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arr := strings.Split(column.ColumnType, "(")
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ctype := arr[0]
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// 翻译为通用数据库类型
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t1 := commonColumnTypeMap[ctype]
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if t1 == "" {
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ctype = "nvarchar(2000)"
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} else {
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// 回写到列信息
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if len(arr) > 1 {
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ctype = t1 + "(" + arr[1]
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} else {
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ctype = t1
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}
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}
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column.ColumnType = ctype
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commonColumns = append(commonColumns, column)
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}
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return commonColumns
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}
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func (md *MssqlDialect) CreateTable(commonColumns []dbi.Column, tableInfo dbi.Table, dropOldTable bool) (int, error) {
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meta := md.dc.GetMetaData()
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replacer := strings.NewReplacer(";", "", "'", "")
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if dropOldTable {
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_, _ = md.dc.Exec(fmt.Sprintf("DROP TABLE IF EXISTS %s", meta.QuoteIdentifier(tableInfo.TableName)))
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}
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// 组装建表语句
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createSql := fmt.Sprintf("CREATE TABLE %s (\n", meta.QuoteIdentifier(tableInfo.TableName))
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fields := make([]string, 0)
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pks := make([]string, 0)
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columnComments := make([]string, 0)
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// 把通用类型转换为达梦类型
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for _, column := range commonColumns {
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// 取出当前数据库类型
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arr := strings.Split(column.ColumnType, "(")
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ctype := arr[0]
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// 翻译为通用数据库类型
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t1 := mssqlColumnTypeMap[ctype]
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if t1 == "" {
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ctype = "nvarchar(2000)"
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} else {
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// 回写到列信息
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if len(arr) > 1 {
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// 如果是int类型不需要指定长度
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if strings.Contains(strings.ToLower(t1), "int") {
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ctype = t1
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} else if collx.ArrayAnyMatches([]string{"float", "number", "decimal"}, strings.ToLower(t1)) {
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// 如果是float，最大长度为38
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match := bracketsRegexp.FindStringSubmatch(column.ColumnType)
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if len(match) > 1 {
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// size翻倍， 防止数据超长报错
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size := anyx.ConvInt(match[1])
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if size >= 38 { // 如果长度超过38
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ctype = t1 + "(38)"
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} else {
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ctype = fmt.Sprintf("%s(%d)", t1, size)
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}
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} else {
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ctype = t1 + "(38)"
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}
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} else if strings.Contains(strings.ToLower(t1), "char") {
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// 如果是字符串类型，长度最大4000，否则修改字段类型为text
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match := bracketsRegexp.FindStringSubmatch(column.ColumnType)
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if len(match) > 1 {
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// size翻倍， 防止数据超长报错
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size := anyx.ConvInt(match[1]) * 2
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if size >= 4000 { // 如果长度超过4000，则替换为text类型
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ctype = "text"
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} else {
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ctype = fmt.Sprintf("%s(%d)", t1, size)
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}
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} else {
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ctype = t1 + "(1000)"
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}
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} else {
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ctype = t1 + "(" + arr[1]
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}
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} else {
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ctype = t1
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}
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}
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column.ColumnType = ctype
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if column.IsPrimaryKey {
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pks = append(pks, meta.QuoteIdentifier(column.ColumnName))
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}
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fields = append(fields, md.genColumnBasicSql(column))
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commentTmp := "EXECUTE sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE', N'%s', N'COLUMN', N'%s'"
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// 防止注释内含有特殊字符串导致sql出错
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comment := replacer.Replace(column.ColumnComment)
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columnComments = append(columnComments, fmt.Sprintf(commentTmp, comment, md.currentSchema(), column.TableName, column.ColumnName))
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}
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createSql += strings.Join(fields, ",")
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if len(pks) > 0 {
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createSql += fmt.Sprintf(", PRIMARY KEY CLUSTERED (%s)", strings.Join(pks, ","))
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}
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createSql += ")"
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tableCommentSql := ""
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if tableInfo.TableComment != "" {
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commentTmp := "EXECUTE sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE', N'%s'"
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tableCommentSql = fmt.Sprintf(commentTmp, replacer.Replace(tableInfo.TableComment), md.currentSchema(), tableInfo.TableName)
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}
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columnCommentSql := strings.Join(columnComments, ";")
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sqls := make([]string, 0)
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if createSql != "" {
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sqls = append(sqls, createSql)
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}
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if tableCommentSql != "" {
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sqls = append(sqls, tableCommentSql)
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}
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if columnCommentSql != "" {
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sqls = append(sqls, columnCommentSql)
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}
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_, err := md.dc.Exec(strings.Join(sqls, ";"))
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return 1, err
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}
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func (md *MssqlDialect) genColumnBasicSql(column dbi.Column) string {
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meta := md.dc.GetMetaData()
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colName := meta.QuoteIdentifier(column.ColumnName)
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incr := ""
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if column.IsIdentity {
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incr = " IDENTITY(1,1)"
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}
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nullAble := ""
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if column.Nullable == "NO" {
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nullAble = " NOT NULL"
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}
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defVal := "" // 默认值需要判断引号，如函数是不需要引号的 // 为了防止跨源函数不支持 当默认值是函数时，不需要设置默认值
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if column.ColumnDefault != "" && !strings.Contains(column.ColumnDefault, "(") {
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// 哪些字段类型默认值需要加引号
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mark := false
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if collx.ArrayAnyMatches([]string{"char", "text", "date", "time", "lob"}, strings.ToLower(column.ColumnType)) {
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// 当数据类型是日期时间，默认值是日期时间函数时，默认值不需要引号
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if collx.ArrayAnyMatches([]string{"date", "time"}, strings.ToLower(column.ColumnType)) &&
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collx.ArrayAnyMatches([]string{"DATE", "TIME"}, strings.ToUpper(column.ColumnDefault)) {
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mark = false
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} else {
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mark = true
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}
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}
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if mark {
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defVal = fmt.Sprintf(" DEFAULT '%s'", column.ColumnDefault)
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} else {
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defVal = fmt.Sprintf(" DEFAULT %s", column.ColumnDefault)
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}
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}
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columnSql := fmt.Sprintf(" %s %s %s %s %s", colName, column.ColumnType, incr, nullAble, defVal)
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return columnSql
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}
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func (md *MssqlDialect) CreateIndex(tableInfo dbi.Table, indexs []dbi.Index) error {
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sqls := make([]string, 0)
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comments := make([]string, 0)
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for _, index := range indexs {
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// 通过字段、表名拼接索引名
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columnName := strings.ReplaceAll(index.ColumnName, "-", "")
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columnName = strings.ReplaceAll(columnName, "_", "")
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colName := strings.ReplaceAll(columnName, ",", "_")
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keyType := "normal"
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unique := ""
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if index.IsUnique {
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keyType = "unique"
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unique = "unique"
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}
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indexName := fmt.Sprintf("%s_key_%s_%s", keyType, tableInfo.TableName, colName)
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sqls = append(sqls, fmt.Sprintf("create %s NONCLUSTERED index %s on %s.%s(%s)", unique, indexName, md.currentSchema(), tableInfo.TableName, index.ColumnName))
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if index.IndexComment != "" {
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comments = append(comments, fmt.Sprintf("EXECUTE sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE', N'%s', N'INDEX', N'%s'", index.IndexComment, md.currentSchema(), tableInfo.TableName, indexName))
|
||
}
|
||
}
|
||
_, err := md.dc.Exec(strings.Join(sqls, ";"))
|
||
// 添加注释
|
||
if len(comments) > 0 {
|
||
_, err = md.dc.Exec(strings.Join(comments, ";"))
|
||
}
|
||
return err
|
||
}
|
||
|
||
func (md *MssqlDialect) UpdateSequence(tableName string, columns []dbi.Column) {
|
||
|
||
}
|