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https://gitee.com/dromara/mayfly-go
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493 lines
14 KiB
Go
493 lines
14 KiB
Go
package oracle
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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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// ---------------------------------- DM元数据 -----------------------------------
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const (
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ORACLE_META_FILE = "metasql/oracle_meta.sql"
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ORACLE_DB_SCHEMAS = "ORACLE_DB_SCHEMAS"
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ORACLE_TABLE_INFO_KEY = "ORACLE_TABLE_INFO"
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ORACLE_INDEX_INFO_KEY = "ORACLE_INDEX_INFO"
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ORACLE_COLUMN_MA_KEY = "ORACLE_COLUMN_MA"
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)
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type OracleMetaData struct {
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dbi.DefaultMetaData
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dc *dbi.DbConn
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}
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func (od *OracleMetaData) GetDbServer() (*dbi.DbServer, error) {
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_, res, err := od.dc.Query("select * from v$instance")
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if err != nil {
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return nil, err
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}
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ds := &dbi.DbServer{
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Version: cast.ToString(res[0]["VERSION"]),
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}
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return ds, nil
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}
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func (od *OracleMetaData) GetDbNames() ([]string, error) {
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_, res, err := od.dc.Query("SELECT name AS DBNAME FROM v$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 (od *OracleMetaData) GetTables(tableNames ...string) ([]dbi.Table, error) {
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meta := od.dc.GetMetaData()
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names := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
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return fmt.Sprintf("'%s'", meta.RemoveQuote(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(ORACLE_META_FILE, ORACLE_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 = od.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 (od *OracleMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error) {
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meta := od.dc.GetMetaData()
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tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
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return fmt.Sprintf("'%s'", meta.RemoveQuote(val))
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}), ",")
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// 如果表数量超过了1000，需要分批查询
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if len(tableNames) > 1000 {
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columns := make([]dbi.Column, 0)
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for i := 0; i < len(tableNames); i += 1000 {
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end := i + 1000
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if end > len(tableNames) {
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end = len(tableNames)
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}
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tables := tableNames[i:end]
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cols, err := od.GetColumns(tables...)
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if err != nil {
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return nil, err
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}
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columns = append(columns, cols...)
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}
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return columns, nil
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}
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_, res, err := od.dc.Query(fmt.Sprintf(dbi.GetLocalSql(ORACLE_META_FILE, ORACLE_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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defaultVal := cast.ToString(re["COLUMN_DEFAULT"])
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// 如果默认值包含.nextval，说明是序列，默认值为null
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if strings.Contains(defaultVal, ".nextval") {
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defaultVal = ""
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}
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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(cast.ToString(re["DATA_TYPE"])),
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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: defaultVal,
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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 (od *OracleMetaData) GetPrimaryKey(tablename string) (string, error) {
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columns, err := od.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 (od *OracleMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
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_, res, err := od.dc.Query(fmt.Sprintf(dbi.GetLocalSql(ORACLE_META_FILE, ORACLE_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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// 获取建索引ddl
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func (od *OracleMetaData) GenerateIndexDDL(indexs []dbi.Index, tableInfo dbi.Table) []string {
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meta := od.dc.GetMetaData()
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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 INDEX %s ON %s(%s)", unique, indexName, meta.QuoteIdentifier(tableInfo.TableName), index.ColumnName))
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if index.IndexComment != "" {
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comments = append(comments, fmt.Sprintf("COMMENT ON INDEX %s IS '%s'", indexName, index.IndexComment))
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}
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}
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sqlArr := make([]string, 0)
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sqlArr = append(sqlArr, sqls...)
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if len(comments) > 0 {
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sqlArr = append(sqlArr, comments...)
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}
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return sqlArr
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}
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func (od *OracleMetaData) genColumnBasicSql(column dbi.Column) string {
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meta := od.dc.GetMetaData()
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colName := meta.QuoteIdentifier(column.ColumnName)
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dataType := string(column.DataType)
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if column.IsIdentity {
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// 如果是自增，不需要设置默认值和空值，自增列数据类型必须是number
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return fmt.Sprintf(" %s NUMBER generated by default as IDENTITY", colName)
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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
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if column.ColumnDefault != "" {
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mark := false
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// 哪些字段类型默认值需要加引号
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if collx.ArrayAnyMatches([]string{"CHAR", "LONG", "DATE", "TIME", "CLOB", "BLOB", "BFILE"}, dataType) {
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// 默认值是时间日期函数的必须要加引号
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val := strings.ToUpper(column.ColumnDefault)
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if collx.ArrayAnyMatches([]string{"DATE", "TIMESTAMP"}, dataType) && val == "CURRENT_DATE" || val == "CURRENT_TIMESTAMP" {
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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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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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} else {
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// 如果是数字，默认值提取数字
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if collx.ArrayAnyMatches([]string{"NUM", "INT"}, dataType) {
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match := bracketsRegexp.FindStringSubmatch(dataType)
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if len(match) > 1 {
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length := cast.ToInt(match[1])
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defVal = fmt.Sprintf(" DEFAULT %d", length)
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} else {
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defVal = fmt.Sprintf(" DEFAULT 0")
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}
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}
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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", colName, column.GetColumnType(), defVal, nullAble)
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return columnSql
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}
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// 获取建表ddl
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func (od *OracleMetaData) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Table, dropBeforeCreate bool) []string {
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meta := od.dc.GetMetaData()
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replacer := strings.NewReplacer(";", "", "'", "")
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quoteTableName := meta.QuoteIdentifier(tableInfo.TableName)
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sqlArr := make([]string, 0)
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if dropBeforeCreate {
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dropSqlTmp := `
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declare
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num number;
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begin
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select count(1) into num from user_tables where table_name = '%s' and owner = (SELECT sys_context('USERENV', 'CURRENT_SCHEMA') FROM dual) ;
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if num > 0 then
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execute immediate 'drop table "%s"' ;
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end if;
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end;
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`
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sqlArr = append(sqlArr, fmt.Sprintf(dropSqlTmp, tableInfo.TableName, 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", quoteTableName)
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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 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, od.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'", quoteTableName, meta.QuoteIdentifier(column.ColumnName), comment))
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}
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}
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// 建表
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createSql += strings.Join(fields, ",\n")
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if len(pks) > 0 {
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createSql += fmt.Sprintf(", \nPRIMARY KEY (%s)", strings.Join(pks, ","))
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}
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createSql += "\n)"
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sqlArr = append(sqlArr, createSql)
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// 表注释
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tableCommentSql := ""
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if tableInfo.TableComment != "" {
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tableCommentSql = fmt.Sprintf("COMMENT ON TABLE %s is '%s'", meta.QuoteIdentifier(tableInfo.TableName), replacer.Replace(tableInfo.TableComment))
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sqlArr = append(sqlArr, tableCommentSql)
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}
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// 列注释
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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 (od *OracleMetaData) GetTableDDL(tableName string) (string, error) {
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// 1.获取表信息
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tbs, err := od.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 := od.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 := od.GenerateTableDDL(columns, *tableInfo, false)
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// 3.获取索引信息
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indexs, err := od.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, od.GenerateIndexDDL(indexs, *tableInfo)...)
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return strings.Join(tableDDLArr, ";\n"), 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 (od *OracleMetaData) GetSchemas() ([]string, error) {
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sql := dbi.GetLocalSql(ORACLE_META_FILE, ORACLE_DB_SCHEMAS)
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_, res, err := od.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["USERNAME"]))
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}
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return schemaNames, nil
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}
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func (od *OracleMetaData) 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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numberTypeRegexp = regexp.MustCompile(`(?i)int|double|float|number|decimal|byte|bit`)
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// 日期时间类型
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datetimeTypeRegexp = regexp.MustCompile(`(?i)date|timestamp`)
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bracketsRegexp = regexp.MustCompile(`\((\d+)\)`)
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converter = new(DataConverter)
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// oracle数据类型 映射 公共数据类型
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commonColumnTypeMap = map[string]dbi.ColumnDataType{
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"CHAR": dbi.CommonTypeChar,
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"NCHAR": dbi.CommonTypeChar,
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"VARCHAR2": dbi.CommonTypeVarchar,
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"NVARCHAR2": dbi.CommonTypeVarchar,
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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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"DECIMAL": dbi.CommonTypeNumber,
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"FLOAT": dbi.CommonTypeNumber,
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"REAL": dbi.CommonTypeNumber,
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"BINARY_FLOAT": dbi.CommonTypeNumber,
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"BINARY_DOUBLE": dbi.CommonTypeNumber,
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"DATE": dbi.CommonTypeDate,
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"TIMESTAMP": dbi.CommonTypeDatetime,
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"LONG": dbi.CommonTypeLongtext,
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"BLOB": dbi.CommonTypeLongtext,
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"CLOB": dbi.CommonTypeLongtext,
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"NCLOB": dbi.CommonTypeLongtext,
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"BFILE": dbi.CommonTypeBinary,
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}
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// 公共数据类型 映射 oracle数据类型
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oracleColumnTypeMap = map[dbi.ColumnDataType]string{
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dbi.CommonTypeVarchar: "NVARCHAR2",
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dbi.CommonTypeChar: "NCHAR",
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dbi.CommonTypeText: "CLOB",
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dbi.CommonTypeBlob: "CLOB",
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dbi.CommonTypeLongblob: "CLOB",
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dbi.CommonTypeLongtext: "CLOB",
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dbi.CommonTypeBinary: "BFILE",
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dbi.CommonTypeMediumblob: "CLOB",
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dbi.CommonTypeMediumtext: "CLOB",
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dbi.CommonTypeVarbinary: "BFILE",
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dbi.CommonTypeInt: "INT",
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dbi.CommonTypeSmallint: "INT",
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dbi.CommonTypeTinyint: "INT",
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dbi.CommonTypeNumber: "NUMBER",
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dbi.CommonTypeBigint: "NUMBER",
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dbi.CommonTypeDatetime: "DATE",
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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: "CLOB",
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dbi.CommonTypeJSON: "CLOB",
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}
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)
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type DataConverter struct {
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}
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func (dc *DataConverter) GetDataType(dbColumnType string) dbi.DataType {
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if numberTypeRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeNumber
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}
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// 日期时间类型
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if datetimeTypeRegexp.MatchString(dbColumnType) {
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return dbi.DataTypeDateTime
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}
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return dbi.DataTypeString
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}
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func (dc *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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// oracle把日期类型数据格式化输出
|
||
case dbi.DataTypeDateTime: // "2024-01-02T22:08:22.275697+08:00"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.DateTime)
|
||
}
|
||
return str
|
||
}
|
||
|
||
func (dc *DataConverter) ParseData(dbColumnValue any, dataType dbi.DataType) any {
|
||
// oracle把日期类型的数据转化为time类型
|
||
if dataType == dbi.DataTypeDateTime {
|
||
res, _ := time.Parse(time.RFC3339, cast.ToString(dbColumnValue))
|
||
return res
|
||
}
|
||
return dbColumnValue
|
||
}
|