refactor: dbm包重构

server/internal/db/dbm/mssql/dialect.go

@@ -1,11 +1,9 @@
 package mssql
 
 import (
-	"context"
 	"database/sql"
 	"fmt"
 	"mayfly-go/internal/db/dbm/dbi"
-	"mayfly-go/pkg/errorx"
 	"mayfly-go/pkg/logx"
 	"mayfly-go/pkg/utils/anyx"
 	"mayfly-go/pkg/utils/collx"
@@ -14,282 +12,12 @@ import (
 	"time"
 )
 
-const (
-	MSSQL_META_FILE           = "metasql/mssql_meta.sql"
-	MSSQL_DBS_KEY             = "MSSQL_DBS"
-	MSSQL_DB_SCHEMAS_KEY      = "MSSQL_DB_SCHEMAS"
-	MSSQL_TABLE_INFO_KEY      = "MSSQL_TABLE_INFO"
-	MSSQL_INDEX_INFO_KEY      = "MSSQL_INDEX_INFO"
-	MSSQL_COLUMN_MA_KEY       = "MSSQL_COLUMN_MA"
-	MSSQL_TABLE_DETAIL_KEY    = "MSSQL_TABLE_DETAIL"
-	MSSQL_TABLE_INDEX_DDL_KEY = "MSSQL_TABLE_INDEX_DDL"
-)
-
 type MssqlDialect struct {
 	dc *dbi.DbConn
 }
 
-func (md *MssqlDialect) GetDbServer() (*dbi.DbServer, error) {
-	_, res, err := md.dc.Query("SELECT @@VERSION as version")
-	if err != nil {
-		return nil, err
-	}
-	ds := &dbi.DbServer{
-		Version: anyx.ConvString(res[0]["version"]),
-	}
-	return ds, nil
-}
-
-func (md *MssqlDialect) GetDbNames() ([]string, error) {
-	_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_DBS_KEY))
-	if err != nil {
-		return nil, err
-	}
-
-	databases := make([]string, 0)
-	for _, re := range res {
-		databases = append(databases, anyx.ConvString(re["dbname"]))
-	}
-
-	return databases, nil
-}
-
-// 从连接信息中获取数据库和schema信息
-func (md *MssqlDialect) currentSchema() string {
-	dbName := md.dc.Info.Database
-	schema := ""
-	arr := strings.Split(dbName, "/")
-	if len(arr) == 2 {
-		schema = arr[1]
-	}
-	return schema
-}
-
-// 获取表基础元信息, 如表名等
-func (md *MssqlDialect) GetTables() ([]dbi.Table, error) {
-	_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_TABLE_INFO_KEY), md.currentSchema())
-
-	if err != nil {
-		return nil, err
-	}
-
-	tables := make([]dbi.Table, 0)
-	for _, re := range res {
-		tables = append(tables, dbi.Table{
-			TableName:    anyx.ConvString(re["tableName"]),
-			TableComment: anyx.ConvString(re["tableComment"]),
-			CreateTime:   anyx.ConvString(re["createTime"]),
-			TableRows:    anyx.ConvInt(re["tableRows"]),
-			DataLength:   anyx.ConvInt64(re["dataLength"]),
-			IndexLength:  anyx.ConvInt64(re["indexLength"]),
-		})
-	}
-	return tables, nil
-}
-
-// 获取列元信息, 如列名等
-func (md *MssqlDialect) GetColumns(tableNames ...string) ([]dbi.Column, error) {
-	dbType := md.dc.Info.Type
-	tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
-		return fmt.Sprintf("'%s'", dbType.RemoveQuote(val))
-	}), ",")
-
-	_, res, err := md.dc.Query(fmt.Sprintf(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_COLUMN_MA_KEY), tableName), md.currentSchema())
-	if err != nil {
-		return nil, err
-	}
-
-	columns := make([]dbi.Column, 0)
-	for _, re := range res {
-		columns = append(columns, dbi.Column{
-			TableName:     anyx.ToString(re["TABLE_NAME"]),
-			ColumnName:    anyx.ToString(re["COLUMN_NAME"]),
-			ColumnType:    anyx.ToString(re["COLUMN_TYPE"]),
-			ColumnComment: anyx.ToString(re["COLUMN_COMMENT"]),
-			Nullable:      anyx.ToString(re["NULLABLE"]),
-			IsPrimaryKey:  anyx.ConvInt(re["IS_PRIMARY_KEY"]) == 1,
-			IsIdentity:    anyx.ConvInt(re["IS_IDENTITY"]) == 1,
-			ColumnDefault: anyx.ToString(re["COLUMN_DEFAULT"]),
-			NumScale:      anyx.ToString(re["NUM_SCALE"]),
-		})
-	}
-	return columns, nil
-}
-
-// 获取表主键字段名，不存在主键标识则默认第一个字段
-func (md *MssqlDialect) GetPrimaryKey(tablename string) (string, error) {
-	columns, err := md.GetColumns(tablename)
-	if err != nil {
-		return "", err
-	}
-	if len(columns) == 0 {
-		return "", errorx.NewBiz("[%s] 表不存在", tablename)
-	}
-
-	for _, v := range columns {
-		if v.IsPrimaryKey {
-			return v.ColumnName, nil
-		}
-	}
-
-	return columns[0].ColumnName, nil
-}
-
-func (md *MssqlDialect) getTableIndexWithPK(tableName string) ([]dbi.Index, error) {
-	_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_INDEX_INFO_KEY), md.currentSchema(), tableName)
-	if err != nil {
-		return nil, err
-	}
-	indexs := make([]dbi.Index, 0)
-	for _, re := range res {
-		indexs = append(indexs, dbi.Index{
-			IndexName:    anyx.ConvString(re["indexName"]),
-			ColumnName:   anyx.ConvString(re["columnName"]),
-			IndexType:    anyx.ConvString(re["indexType"]),
-			IndexComment: anyx.ConvString(re["indexComment"]),
-			IsUnique:     anyx.ConvInt(re["isUnique"]) == 1,
-			SeqInIndex:   anyx.ConvInt(re["seqInIndex"]),
-		})
-	}
-	// 把查询结果以索引名分组，多个索引字段以逗号连接
-	result := make([]dbi.Index, 0)
-	key := ""
-	for _, v := range indexs {
-		// 当前的索引名
-		in := v.IndexName
-		if key == in {
-			// 索引字段已根据名称和字段顺序排序，故取最后一个即可
-			i := len(result) - 1
-			// 同索引字段以逗号连接
-			result[i].ColumnName = result[i].ColumnName + "," + v.ColumnName
-		} else {
-			key = in
-			result = append(result, v)
-		}
-	}
-	return indexs, nil
-}
-
-// 获取表索引信息
-func (md *MssqlDialect) GetTableIndex(tableName string) ([]dbi.Index, error) {
-	indexs, _ := md.getTableIndexWithPK(tableName)
-	result := make([]dbi.Index, 0)
-	// 过滤掉主键索引,主键索引名为PK__开头的
-	for _, v := range indexs {
-		in := v.IndexName
-		if strings.HasPrefix(in, "PK__") {
-			continue
-		}
-	}
-	return result, nil
-}
-
-func (md MssqlDialect) CopyTableDDL(tableName string, newTableName string) (string, error) {
-	if newTableName == "" {
-		newTableName = tableName
-	}
-
-	// 根据列信息生成建表语句
-	var builder strings.Builder
-	var commentBuilder strings.Builder
-
-	// 查询表名和表注释, 设置表注释
-	_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_TABLE_DETAIL_KEY), md.currentSchema(), tableName)
-	if err != nil {
-		return "", err
-	}
-	tableComment := ""
-	if len(res) > 0 {
-		tableComment = anyx.ToString(res[0]["tableComment"])
-		if tableComment != "" {
-			// 注释转义单引号
-			tableComment = strings.ReplaceAll(tableComment, "'", "\\'")
-			commentBuilder.WriteString(fmt.Sprintf("\nEXEC sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE',N'%s';\n", tableComment, md.currentSchema(), newTableName))
-		}
-	}
-
-	baseTable := fmt.Sprintf("%s.%s", md.dc.Info.Type.QuoteIdentifier(md.currentSchema()), md.dc.Info.Type.QuoteIdentifier(newTableName))
-
-	// 查询列信息
-	columns, err := md.GetColumns(tableName)
-	if err != nil {
-		return "", err
-	}
-
-	builder.WriteString(fmt.Sprintf("CREATE TABLE %s (\n", baseTable))
-	pks := make([]string, 0)
-	for i, v := range columns {
-		nullAble := "NULL"
-		if v.Nullable == "NO" {
-			nullAble = "NOT NULL"
-		}
-		builder.WriteString(fmt.Sprintf("\t[%s] %s %s", v.ColumnName, v.ColumnType, nullAble))
-		if v.IsIdentity {
-			builder.WriteString(" IDENTITY(1,11)")
-		}
-		if v.ColumnDefault != "" {
-			builder.WriteString(fmt.Sprintf(" DEFAULT %s", v.ColumnDefault))
-		}
-		if v.IsPrimaryKey {
-			pks = append(pks, fmt.Sprintf("[%s]", v.ColumnName))
-		}
-		if i < len(columns)-1 {
-			builder.WriteString(",")
-		}
-		builder.WriteString("\n")
-	}
-	// 设置主键
-	if len(pks) > 0 {
-		builder.WriteString(fmt.Sprintf("\tCONSTRAINT PK_%s PRIMARY KEY ( %s )", newTableName, strings.Join(pks, ",")))
-	}
-	builder.WriteString("\n);\n")
-
-	// 设置字段注释
-	for _, v := range columns {
-		if v.ColumnComment != "" {
-			// 注释转义单引号
-			v.ColumnComment = strings.ReplaceAll(v.ColumnComment, "'", "\\'")
-			commentBuilder.WriteString(fmt.Sprintf("\nEXEC sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE',N'%s', N'COLUMN', N'%s';\n", v.ColumnComment, md.currentSchema(), newTableName, v.ColumnName))
-		}
-	}
-
-	// 设置索引
-	indexs, err := md.GetTableIndex(tableName)
-	if err != nil {
-		return "", err
-	}
-	for _, v := range indexs {
-		builder.WriteString(fmt.Sprintf("\nCREATE NONCLUSTERED INDEX [%s] ON %s (%s);\n", v.IndexName, baseTable, v.ColumnName))
-		// 设置索引注释
-		if v.IndexComment != "" {
-			// 注释转义单引号
-			v.IndexComment = strings.ReplaceAll(v.IndexComment, "'", "\\'")
-			commentBuilder.WriteString(fmt.Sprintf("\nEXEC sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE',N'%s', N'INDEX', N'%s';\n", v.IndexComment, md.currentSchema(), newTableName, v.IndexName))
-		}
-	}
-	return builder.String() + commentBuilder.String(), nil
-}
-
-// 获取建表ddl
-func (md *MssqlDialect) GetTableDDL(tableName string) (string, error) {
-	return md.CopyTableDDL(tableName, "")
-}
-
-func (md *MssqlDialect) WalkTableRecord(tableName string, walkFn dbi.WalkQueryRowsFunc) error {
-	return md.dc.WalkQueryRows(context.Background(), fmt.Sprintf("SELECT * FROM %s", tableName), walkFn)
-}
-
-func (md *MssqlDialect) GetSchemas() ([]string, error) {
-	_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_DB_SCHEMAS_KEY))
-	if err != nil {
-		return nil, err
-	}
-
-	schemas := make([]string, 0)
-	for _, re := range res {
-		schemas = append(schemas, anyx.ConvString(re["SCHEMA_NAME"]))
-	}
-	return schemas, nil
+func (md *MssqlDialect) GetMetaData() dbi.MetaData {
+	return &MssqlMetaData{dc: md.dc}
 }
 
 // GetDbProgram 获取数据库程序模块，用于数据库备份与恢复
@@ -307,11 +35,12 @@ func (md *MssqlDialect) BatchInsert(tx *sql.Tx, tableName string, columns []stri
 }
 
 func (md *MssqlDialect) batchInsertSimple(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
-	schema := md.currentSchema()
+	msMetadata := md.GetMetaData().(*MssqlMetaData)
+	schema := md.dc.Info.CurrentSchema()
 	ignoreDupSql := ""
 	if duplicateStrategy == dbi.DuplicateStrategyIgnore {
 		// ALTER TABLE dbo.TEST ADD CONSTRAINT uniqueRows UNIQUE (ColA, ColB, ColC, ColD) WITH (IGNORE_DUP_KEY = ON)
-		indexs, _ := md.getTableIndexWithPK(tableName)
+		indexs, _ := msMetadata.getTableIndexWithPK(tableName)
 		// 收集唯一索引涉及到的字段
 		uniqueColumns := make([]string, 0)
 		for _, index := range indexs {
@@ -365,7 +94,8 @@ func (md *MssqlDialect) batchInsertSimple(tx *sql.Tx, tableName string, columns
 }
 
 func (md *MssqlDialect) batchInsertMerge(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
-	schema := md.currentSchema()
+	msMetadata := md.GetMetaData().(*MssqlMetaData)
+	schema := md.dc.Info.CurrentSchema()
 	dbType := md.dc.Info.Type
 
 	// 收集MERGE 语句的 ON 子句条件
@@ -374,7 +104,7 @@ func (md *MssqlDialect) batchInsertMerge(tx *sql.Tx, tableName string, columns [
 
 	// 查询取出自增列字段, merge update不能修改自增列
 	identityCols := make([]string, 0)
-	cols, err := md.GetColumns(tableName)
+	cols, err := msMetadata.GetColumns(tableName)
 	for _, col := range cols {
 		if col.IsIdentity {
 			identityCols = append(identityCols, col.ColumnName)
@@ -491,14 +221,14 @@ func (dc *DataConverter) ParseData(dbColumnValue any, dataType dbi.DataType) any
 }
 
 func (md *MssqlDialect) CopyTable(copy *dbi.DbCopyTable) error {
-
-	schema := md.currentSchema()
+	msMetadata := md.GetMetaData().(*MssqlMetaData)
+	schema := md.dc.Info.CurrentSchema()
 
 	// 生成新表名,为老表明+_copy_时间戳
 	newTableName := copy.TableName + "_copy_" + time.Now().Format("20060102150405")
 
 	// 复制建表语句
-	ddl, err := md.CopyTableDDL(copy.TableName, newTableName)
+	ddl, err := msMetadata.CopyTableDDL(copy.TableName, newTableName)
 	if err != nil {
 		return err
 	}
@@ -512,7 +242,7 @@ func (md *MssqlDialect) CopyTable(copy *dbi.DbCopyTable) error {
 	if copy.CopyData {
 		go func() {
 			// 查询所有的列
-			columns, err := md.GetColumns(copy.TableName)
+			columns, err := msMetadata.GetColumns(copy.TableName)
 			if err != nil {
 				logx.Warnf("复制表[%s]数据失败: %s", copy.TableName, err.Error())
 				return