mirror of
https://gitee.com/dromara/mayfly-go
synced 2025-11-02 23:40:24 +08:00
460 lines
14 KiB
Go
460 lines
14 KiB
Go
package dm
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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/logx"
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"mayfly-go/pkg/utils/anyx"
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"mayfly-go/pkg/utils/collx"
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"mayfly-go/pkg/utils/stringx"
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"regexp"
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"strings"
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"time"
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"github.com/may-fly/cast"
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)
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const (
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DM_META_FILE = "metasql/dm_meta.sql"
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DM_DB_SCHEMAS = "DM_DB_SCHEMAS"
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DM_TABLE_INFO_KEY = "DM_TABLE_INFO"
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DM_INDEX_INFO_KEY = "DM_INDEX_INFO"
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DM_COLUMN_MA_KEY = "DM_COLUMN_MA"
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)
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type DMMetaData struct {
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dbi.DefaultMetaData
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dc *dbi.DbConn
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}
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func (dd *DMMetaData) GetDbServer() (*dbi.DbServer, error) {
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_, res, err := dd.dc.Query("select * from v$instance")
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if err != nil {
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return nil, err
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}
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ds := &dbi.DbServer{
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Version: cast.ToString(res[0]["SVR_VERSION"]),
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}
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return ds, nil
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}
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func (dd *DMMetaData) GetDbNames() ([]string, error) {
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_, res, err := dd.dc.Query("SELECT name AS DBNAME FROM v$database")
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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, cast.ToString(re["DBNAME"]))
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}
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return databases, nil
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}
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func (dd *DMMetaData) GetTables(tableNames ...string) ([]dbi.Table, error) {
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names := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
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return fmt.Sprintf("'%s'", dbi.RemoveQuote(dd, val))
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}), ",")
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var res []map[string]any
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var err error
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sql, err := stringx.TemplateParse(dbi.GetLocalSql(DM_META_FILE, DM_TABLE_INFO_KEY), collx.M{"tableNames": names})
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if err != nil {
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return nil, err
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}
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_, res, err = dd.dc.Query(sql)
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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: cast.ToString(re["TABLE_NAME"]),
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TableComment: cast.ToString(re["TABLE_COMMENT"]),
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CreateTime: cast.ToString(re["CREATE_TIME"]),
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TableRows: cast.ToInt(re["TABLE_ROWS"]),
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DataLength: cast.ToInt64(re["DATA_LENGTH"]),
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IndexLength: cast.ToInt64(re["INDEX_LENGTH"]),
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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 (dd *DMMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error) {
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tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
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return fmt.Sprintf("'%s'", dbi.RemoveQuote(dd, val))
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}), ",")
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_, res, err := dd.dc.Query(fmt.Sprintf(dbi.GetLocalSql(DM_META_FILE, DM_COLUMN_MA_KEY), tableName))
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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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column := dbi.Column{
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TableName: cast.ToString(re["TABLE_NAME"]),
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ColumnName: cast.ToString(re["COLUMN_NAME"]),
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DataType: dbi.ColumnDataType(anyx.ToString(re["DATA_TYPE"])),
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CharMaxLength: cast.ToInt(re["CHAR_MAX_LENGTH"]),
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ColumnComment: cast.ToString(re["COLUMN_COMMENT"]),
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Nullable: cast.ToString(re["NULLABLE"]),
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IsPrimaryKey: cast.ToInt(re["IS_PRIMARY_KEY"]) == 1,
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IsIdentity: cast.ToInt(re["IS_IDENTITY"]) == 1,
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ColumnDefault: cast.ToString(re["COLUMN_DEFAULT"]),
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NumPrecision: cast.ToInt(re["NUM_PRECISION"]),
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NumScale: cast.ToInt(re["NUM_SCALE"]),
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}
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columns = append(columns, column)
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}
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return columns, nil
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}
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func (dd *DMMetaData) GetPrimaryKey(tablename string) (string, error) {
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columns, err := dd.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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// 获取表索引信息
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func (dd *DMMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
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_, res, err := dd.dc.Query(fmt.Sprintf(dbi.GetLocalSql(DM_META_FILE, DM_INDEX_INFO_KEY), 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: cast.ToString(re["INDEX_NAME"]),
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ColumnName: cast.ToString(re["COLUMN_NAME"]),
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IndexType: cast.ToString(re["INDEX_TYPE"]),
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IndexComment: cast.ToString(re["INDEX_COMMENT"]),
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IsUnique: cast.ToInt(re["IS_UNIQUE"]) == 1,
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SeqInIndex: cast.ToInt(re["SEQ_IN_INDEX"]),
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})
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}
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// 把查询结果以索引名分组，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 result, nil
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}
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func (dd *DMMetaData) genColumnBasicSql(column dbi.Column) string {
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meta := dd.dc.GetMetaData()
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colName := meta.QuoteIdentifier(column.ColumnName)
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dataType := string(column.DataType)
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incr := ""
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if column.IsIdentity {
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incr = " IDENTITY"
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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(dataType)) {
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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(dataType)) &&
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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.GetColumnType(), incr, nullAble, defVal)
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return columnSql
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}
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func (dd *DMMetaData) GenerateIndexDDL(indexs []dbi.Index, tableInfo dbi.Table) []string {
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meta := dd.dc.GetMetaData()
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sqls := 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 index %s on %s(%s)", unique, indexName, meta.QuoteIdentifier(tableInfo.TableName), index.ColumnName))
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}
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return sqls
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}
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func (dd *DMMetaData) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Table, dropBeforeCreate bool) []string {
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meta := dd.dc.GetMetaData()
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replacer := strings.NewReplacer(";", "", "'", "")
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tbName := meta.QuoteIdentifier(tableInfo.TableName)
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sqlArr := make([]string, 0)
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if dropBeforeCreate {
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sqlArr = append(sqlArr, fmt.Sprintf("drop table if exists %s", tbName))
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}
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// 组装建表语句
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createSql := fmt.Sprintf("create table %s (", tbName)
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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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for _, column := range columns {
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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, dd.genColumnBasicSql(column))
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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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if column.ColumnComment != "" {
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comment := replacer.Replace(column.ColumnComment)
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columnComments = append(columnComments, fmt.Sprintf("comment on column %s.%s is '%s'", tbName, meta.QuoteIdentifier(column.ColumnName), comment))
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}
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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 (%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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// 防止注释内含有特殊字符串导致sql出错
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comment := replacer.Replace(tableInfo.TableComment)
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if comment != "" {
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tableCommentSql = fmt.Sprintf(" comment on table %s is '%s'", tbName, comment)
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}
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}
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sqlArr = append(sqlArr, createSql)
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if tableCommentSql != "" {
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sqlArr = append(sqlArr, tableCommentSql)
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}
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if len(columnComments) > 0 {
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sqlArr = append(sqlArr, columnComments...)
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}
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return sqlArr
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}
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// 获取建表ddl
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func (dd *DMMetaData) GetTableDDL(tableName string) (string, error) {
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// 1.获取表信息
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tbs, err := dd.GetTables(tableName)
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tableInfo := &dbi.Table{}
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if err != nil && len(tbs) > 0 {
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logx.Errorf("获取表信息失败, %s", tableName)
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return "", err
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}
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tableInfo.TableName = tbs[0].TableName
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tableInfo.TableComment = tbs[0].TableComment
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// 2.获取列信息
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columns, err := dd.GetColumns(tableName)
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if err != nil {
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logx.Errorf("获取列信息失败, %s", tableName)
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return "", err
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}
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tableDDLArr := dd.GenerateTableDDL(columns, *tableInfo, false)
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// 3.获取索引信息
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indexs, err := dd.GetTableIndex(tableName)
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if err != nil {
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logx.Errorf("获取索引信息失败, %s", tableName)
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return "", err
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}
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// 组装返回
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tableDDLArr = append(tableDDLArr, dd.GenerateIndexDDL(indexs, *tableInfo)...)
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return strings.Join(tableDDLArr, ";"), nil
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}
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// 获取DM当前连接的库可访问的schemaNames
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func (dd *DMMetaData) GetSchemas() ([]string, error) {
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sql := dbi.GetLocalSql(DM_META_FILE, DM_DB_SCHEMAS)
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_, res, err := dd.dc.Query(sql)
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if err != nil {
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return nil, err
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}
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schemaNames := make([]string, 0)
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for _, re := range res {
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schemaNames = append(schemaNames, cast.ToString(re["SCHEMA_NAME"]))
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}
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return schemaNames, nil
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}
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func (dd *DMMetaData) GetDataConverter() dbi.DataConverter {
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return converter
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}
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var (
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// 数字类型
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numberRegexp = regexp.MustCompile(`(?i)int|double|float|number|decimal|byte|bit`)
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// 日期时间类型
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datetimeRegexp = regexp.MustCompile(`(?i)datetime|timestamp`)
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// 日期类型
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dateRegexp = regexp.MustCompile(`(?i)date`)
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// 时间类型
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timeRegexp = regexp.MustCompile(`(?i)time`)
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converter = new(DataConverter)
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// 达梦数据类型 对应 公共数据类型
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commonColumnTypeMap = map[string]dbi.ColumnDataType{
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"CHAR": dbi.CommonTypeChar, // 字符数据类型
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"VARCHAR": dbi.CommonTypeVarchar,
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"TEXT": dbi.CommonTypeText,
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"LONG": dbi.CommonTypeText,
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"LONGVARCHAR": dbi.CommonTypeLongtext,
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"IMAGE": dbi.CommonTypeLongtext,
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"LONGVARBINARY": dbi.CommonTypeLongtext,
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"BLOB": dbi.CommonTypeBlob,
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"CLOB": dbi.CommonTypeText,
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"NUMERIC": dbi.CommonTypeNumber, // 精确数值数据类型
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"DECIMAL": dbi.CommonTypeNumber,
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"NUMBER": dbi.CommonTypeNumber,
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"INTEGER": dbi.CommonTypeInt,
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"INT": dbi.CommonTypeInt,
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"BIGINT": dbi.CommonTypeBigint,
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"TINYINT": dbi.CommonTypeTinyint,
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"BYTE": dbi.CommonTypeTinyint,
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"SMALLINT": dbi.CommonTypeSmallint,
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"BIT": dbi.CommonTypeTinyint,
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"DOUBLE": dbi.CommonTypeNumber, // 近似数值类型
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"FLOAT": dbi.CommonTypeNumber,
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"DATE": dbi.CommonTypeDate, // 一般日期时间数据类型
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"TIME": dbi.CommonTypeTime,
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"TIMESTAMP": dbi.CommonTypeTimestamp,
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}
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// 公共数据类型 对应 达梦数据类型
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dmColumnTypeMap = map[dbi.ColumnDataType]string{
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dbi.CommonTypeVarchar: "VARCHAR",
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dbi.CommonTypeChar: "CHAR",
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dbi.CommonTypeText: "TEXT",
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dbi.CommonTypeBlob: "BLOB",
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dbi.CommonTypeLongblob: "TEXT",
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dbi.CommonTypeLongtext: "TEXT",
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dbi.CommonTypeBinary: "TEXT",
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dbi.CommonTypeMediumblob: "TEXT",
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dbi.CommonTypeMediumtext: "TEXT",
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dbi.CommonTypeVarbinary: "TEXT",
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dbi.CommonTypeInt: "INT",
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dbi.CommonTypeSmallint: "SMALLINT",
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dbi.CommonTypeTinyint: "TINYINT",
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dbi.CommonTypeNumber: "NUMBER",
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dbi.CommonTypeBigint: "BIGINT",
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dbi.CommonTypeDatetime: "TIMESTAMP",
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dbi.CommonTypeDate: "DATE",
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dbi.CommonTypeTime: "DATE",
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dbi.CommonTypeTimestamp: "TIMESTAMP",
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dbi.CommonTypeEnum: "TEXT",
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dbi.CommonTypeJSON: "TEXT",
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}
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)
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type DataConverter struct {
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}
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func (dd *DataConverter) GetDataType(dbColumnType string) dbi.DataType {
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if numberRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeNumber
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}
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if datetimeRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeDateTime
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}
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if dateRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeDate
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}
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if timeRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeTime
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}
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return dbi.DataTypeString
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}
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func (dd *DataConverter) FormatData(dbColumnValue any, dataType dbi.DataType) string {
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str := anyx.ToString(dbColumnValue)
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switch dataType {
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case dbi.DataTypeDateTime: // "2024-01-02T22:08:22.275697+08:00"
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res, _ := time.Parse(time.RFC3339, str)
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return res.Format(time.DateTime)
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case dbi.DataTypeDate: // "2024-01-02T00:00:00+08:00"
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res, _ := time.Parse(time.RFC3339, str)
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return res.Format(time.DateOnly)
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case dbi.DataTypeTime: // "0000-01-01T22:08:22.275688+08:00"
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res, _ := time.Parse(time.RFC3339, str)
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return res.Format(time.TimeOnly)
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}
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return str
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}
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func (dd *DataConverter) ParseData(dbColumnValue any, dataType dbi.DataType) any {
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// 如果dataType是datetime而dbColumnValue是string类型，则需要转换为time.Time类型
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_, ok := dbColumnValue.(string)
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if ok {
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if dataType == dbi.DataTypeDateTime {
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res, _ := time.Parse(time.RFC3339, anyx.ToString(dbColumnValue))
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return res
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}
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if dataType == dbi.DataTypeDate {
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res, _ := time.Parse(time.DateOnly, anyx.ToString(dbColumnValue))
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return res
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}
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if dataType == dbi.DataTypeTime {
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res, _ := time.Parse(time.TimeOnly, anyx.ToString(dbColumnValue))
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return res
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}
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}
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return dbColumnValue
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}
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