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https://gitee.com/dromara/mayfly-go
synced 2025-11-04 00:10:25 +08:00
refactor: dbm包重构
This commit is contained in:
meilin.huang
273
server/internal/db/dbm/mssql/metadata.go
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273
server/internal/db/dbm/mssql/metadata.go
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@@ -0,0 +1,273 @@
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package mssql
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import (
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"fmt"
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"mayfly-go/internal/db/dbm/dbi"
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"mayfly-go/pkg/errorx"
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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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)
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const (
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MSSQL_META_FILE = "metasql/mssql_meta.sql"
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MSSQL_DBS_KEY = "MSSQL_DBS"
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MSSQL_DB_SCHEMAS_KEY = "MSSQL_DB_SCHEMAS"
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MSSQL_TABLE_INFO_KEY = "MSSQL_TABLE_INFO"
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MSSQL_INDEX_INFO_KEY = "MSSQL_INDEX_INFO"
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MSSQL_COLUMN_MA_KEY = "MSSQL_COLUMN_MA"
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MSSQL_TABLE_DETAIL_KEY = "MSSQL_TABLE_DETAIL"
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MSSQL_TABLE_INDEX_DDL_KEY = "MSSQL_TABLE_INDEX_DDL"
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)
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type MssqlMetaData struct {
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dc *dbi.DbConn
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}
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func (md *MssqlMetaData) GetDbServer() (*dbi.DbServer, error) {
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_, res, err := md.dc.Query("SELECT @@VERSION as version")
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if err != nil {
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return nil, err
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}
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ds := &dbi.DbServer{
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Version: anyx.ConvString(res[0]["version"]),
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}
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return ds, nil
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}
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func (md *MssqlMetaData) GetDbNames() ([]string, error) {
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_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_DBS_KEY))
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if err != nil {
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return nil, err
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}
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databases := make([]string, 0)
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for _, re := range res {
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databases = append(databases, anyx.ConvString(re["dbname"]))
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}
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return databases, nil
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}
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// 获取表基础元信息, 如表名等
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func (md *MssqlMetaData) GetTables() ([]dbi.Table, error) {
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_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_TABLE_INFO_KEY), md.dc.Info.CurrentSchema())
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if err != nil {
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return nil, err
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}
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tables := make([]dbi.Table, 0)
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for _, re := range res {
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tables = append(tables, dbi.Table{
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TableName: anyx.ConvString(re["tableName"]),
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TableComment: anyx.ConvString(re["tableComment"]),
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CreateTime: anyx.ConvString(re["createTime"]),
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TableRows: anyx.ConvInt(re["tableRows"]),
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DataLength: anyx.ConvInt64(re["dataLength"]),
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IndexLength: anyx.ConvInt64(re["indexLength"]),
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})
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}
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return tables, nil
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}
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// 获取列元信息, 如列名等
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func (md *MssqlMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error) {
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dbType := md.dc.Info.Type
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tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
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return fmt.Sprintf("'%s'", dbType.RemoveQuote(val))
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}), ",")
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_, res, err := md.dc.Query(fmt.Sprintf(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_COLUMN_MA_KEY), tableName), md.dc.Info.CurrentSchema())
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if err != nil {
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return nil, err
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}
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columns := make([]dbi.Column, 0)
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for _, re := range res {
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columns = append(columns, dbi.Column{
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TableName: anyx.ToString(re["TABLE_NAME"]),
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ColumnName: anyx.ToString(re["COLUMN_NAME"]),
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ColumnType: anyx.ToString(re["COLUMN_TYPE"]),
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ColumnComment: anyx.ToString(re["COLUMN_COMMENT"]),
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Nullable: anyx.ToString(re["NULLABLE"]),
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IsPrimaryKey: anyx.ConvInt(re["IS_PRIMARY_KEY"]) == 1,
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IsIdentity: anyx.ConvInt(re["IS_IDENTITY"]) == 1,
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ColumnDefault: anyx.ToString(re["COLUMN_DEFAULT"]),
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NumScale: anyx.ToString(re["NUM_SCALE"]),
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})
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}
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return columns, nil
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}
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// 获取表主键字段名，不存在主键标识则默认第一个字段
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func (md *MssqlMetaData) GetPrimaryKey(tablename string) (string, error) {
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columns, err := md.GetColumns(tablename)
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if err != nil {
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return "", err
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}
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if len(columns) == 0 {
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return "", errorx.NewBiz("[%s] 表不存在", tablename)
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}
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for _, v := range columns {
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if v.IsPrimaryKey {
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return v.ColumnName, nil
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}
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}
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return columns[0].ColumnName, nil
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}
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func (md *MssqlMetaData) getTableIndexWithPK(tableName string) ([]dbi.Index, error) {
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_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_INDEX_INFO_KEY), md.dc.Info.CurrentSchema(), tableName)
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if err != nil {
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return nil, err
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}
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indexs := make([]dbi.Index, 0)
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for _, re := range res {
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indexs = append(indexs, dbi.Index{
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IndexName: anyx.ConvString(re["indexName"]),
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ColumnName: anyx.ConvString(re["columnName"]),
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IndexType: anyx.ConvString(re["indexType"]),
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IndexComment: anyx.ConvString(re["indexComment"]),
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IsUnique: anyx.ConvInt(re["isUnique"]) == 1,
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SeqInIndex: anyx.ConvInt(re["seqInIndex"]),
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})
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}
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// 把查询结果以索引名分组，多个索引字段以逗号连接
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result := make([]dbi.Index, 0)
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key := ""
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for _, v := range indexs {
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// 当前的索引名
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in := v.IndexName
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if key == in {
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// 索引字段已根据名称和字段顺序排序，故取最后一个即可
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i := len(result) - 1
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// 同索引字段以逗号连接
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result[i].ColumnName = result[i].ColumnName + "," + v.ColumnName
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} else {
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key = in
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result = append(result, v)
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}
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}
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return indexs, nil
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}
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// 获取表索引信息
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func (md *MssqlMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
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indexs, _ := md.getTableIndexWithPK(tableName)
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result := make([]dbi.Index, 0)
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// 过滤掉主键索引,主键索引名为PK__开头的
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for _, v := range indexs {
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in := v.IndexName
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if strings.HasPrefix(in, "PK__") {
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continue
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}
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}
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return result, nil
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}
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func (md MssqlMetaData) CopyTableDDL(tableName string, newTableName string) (string, error) {
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if newTableName == "" {
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newTableName = tableName
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}
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// 根据列信息生成建表语句
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var builder strings.Builder
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var commentBuilder strings.Builder
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// 查询表名和表注释, 设置表注释
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_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_TABLE_DETAIL_KEY), md.dc.Info.CurrentSchema(), tableName)
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if err != nil {
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return "", err
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}
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tableComment := ""
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if len(res) > 0 {
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tableComment = anyx.ToString(res[0]["tableComment"])
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if tableComment != "" {
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// 注释转义单引号
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tableComment = strings.ReplaceAll(tableComment, "'", "\\'")
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commentBuilder.WriteString(fmt.Sprintf("\nEXEC sp_addextendedproperty N'MS_Description', N'%s', N'SCHEMA', N'%s', N'TABLE',N'%s';\n", tableComment, md.dc.Info.CurrentSchema(), newTableName))
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}
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}
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baseTable := fmt.Sprintf("%s.%s", md.dc.Info.Type.QuoteIdentifier(md.dc.Info.CurrentSchema()), md.dc.Info.Type.QuoteIdentifier(newTableName))
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// 查询列信息
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columns, err := md.GetColumns(tableName)
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if err != nil {
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return "", err
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}
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builder.WriteString(fmt.Sprintf("CREATE TABLE %s (\n", baseTable))
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pks := make([]string, 0)
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for i, v := range columns {
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nullAble := "NULL"
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if v.Nullable == "NO" {
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nullAble = "NOT NULL"
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}
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builder.WriteString(fmt.Sprintf("\t[%s] %s %s", v.ColumnName, v.ColumnType, nullAble))
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if v.IsIdentity {
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builder.WriteString(" IDENTITY(1,11)")
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}
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if v.ColumnDefault != "" {
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builder.WriteString(fmt.Sprintf(" DEFAULT %s", v.ColumnDefault))
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}
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if v.IsPrimaryKey {
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pks = append(pks, fmt.Sprintf("[%s]", v.ColumnName))
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}
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if i < len(columns)-1 {
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builder.WriteString(",")
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}
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builder.WriteString("\n")
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}
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// 设置主键
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if len(pks) > 0 {
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builder.WriteString(fmt.Sprintf("\tCONSTRAINT PK_%s PRIMARY KEY ( %s )", newTableName, strings.Join(pks, ",")))
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}
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builder.WriteString("\n);\n")
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// 设置字段注释
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for _, v := range columns {
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if v.ColumnComment != "" {
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// 注释转义单引号
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v.ColumnComment = strings.ReplaceAll(v.ColumnComment, "'", "\\'")
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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.dc.Info.CurrentSchema(), newTableName, v.ColumnName))
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}
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}
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// 设置索引
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indexs, err := md.GetTableIndex(tableName)
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if err != nil {
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return "", err
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}
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for _, v := range indexs {
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builder.WriteString(fmt.Sprintf("\nCREATE NONCLUSTERED INDEX [%s] ON %s (%s);\n", v.IndexName, baseTable, v.ColumnName))
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// 设置索引注释
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if v.IndexComment != "" {
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// 注释转义单引号
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v.IndexComment = strings.ReplaceAll(v.IndexComment, "'", "\\'")
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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.dc.Info.CurrentSchema(), newTableName, v.IndexName))
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}
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}
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return builder.String() + commentBuilder.String(), nil
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}
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// 获取建表ddl
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func (md *MssqlMetaData) GetTableDDL(tableName string) (string, error) {
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return md.CopyTableDDL(tableName, "")
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}
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func (md *MssqlMetaData) GetSchemas() ([]string, error) {
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_, res, err := md.dc.Query(dbi.GetLocalSql(MSSQL_META_FILE, MSSQL_DB_SCHEMAS_KEY))
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if err != nil {
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return nil, err
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}
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schemas := make([]string, 0)
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for _, re := range res {
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schemas = append(schemas, anyx.ConvString(re["SCHEMA_NAME"]))
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}
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return schemas, nil
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}
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