mirror of
https://gitee.com/dromara/mayfly-go
synced 2025-11-02 23:40:24 +08:00
469 lines
15 KiB
Go
469 lines
15 KiB
Go
package dm
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import (
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"database/sql"
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"fmt"
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"mayfly-go/internal/db/dbm/dbi"
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"mayfly-go/pkg/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/kanzihuang/vitess/go/vt/sqlparser"
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_ "gitee.com/chunanyong/dm"
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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 DMDialect struct {
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dc *dbi.DbConn
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}
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func (dd *DMDialect) GetDbServer() (*dbi.DbServer, error) {
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_, res, err := dd.dc.Query("select * from v$instance")
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if err != nil {
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return nil, err
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}
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ds := &dbi.DbServer{
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Version: anyx.ConvString(res[0]["SVR_VERSION"]),
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}
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return ds, nil
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}
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func (dd *DMDialect) GetDbNames() ([]string, error) {
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_, res, err := dd.dc.Query("SELECT name AS DBNAME FROM v$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, 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 (dd *DMDialect) GetTables() ([]dbi.Table, error) {
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// 首先执行更新统计信息sql 这个统计信息在数据量比较大的时候就比较耗时，所以最好定时执行
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// _, _, err := pd.dc.Query("dbms_stats.GATHER_SCHEMA_stats(SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID))")
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// 查询表信息
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_, res, err := dd.dc.Query(dbi.GetLocalSql(DM_META_FILE, DM_TABLE_INFO_KEY))
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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["TABLE_NAME"]),
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TableComment: anyx.ConvString(re["TABLE_COMMENT"]),
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CreateTime: anyx.ConvString(re["CREATE_TIME"]),
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TableRows: anyx.ConvInt(re["TABLE_ROWS"]),
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DataLength: anyx.ConvInt64(re["DATA_LENGTH"]),
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IndexLength: anyx.ConvInt64(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 *DMDialect) GetColumns(tableNames ...string) ([]dbi.Column, error) {
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dbType := dd.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 := 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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columns = append(columns, dbi.Column{
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TableName: anyx.ConvString(re["TABLE_NAME"]),
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ColumnName: anyx.ConvString(re["COLUMN_NAME"]),
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ColumnType: anyx.ConvString(re["COLUMN_TYPE"]),
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ColumnComment: anyx.ConvString(re["COLUMN_COMMENT"]),
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Nullable: anyx.ConvString(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.ConvString(re["COLUMN_DEFAULT"]),
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NumScale: anyx.ConvString(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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func (dd *DMDialect) 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 *DMDialect) 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: anyx.ConvString(re["INDEX_NAME"]),
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ColumnName: anyx.ConvString(re["COLUMN_NAME"]),
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IndexType: anyx.ConvString(re["INDEX_TYPE"]),
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IndexComment: anyx.ConvString(re["INDEX_COMMENT"]),
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IsUnique: anyx.ConvInt(re["IS_UNIQUE"]) == 1,
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SeqInIndex: anyx.ConvInt(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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// 获取建表ddl
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func (dd *DMDialect) GetTableDDL(tableName string) (string, error) {
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ddlSql := fmt.Sprintf("CALL SP_TABLEDEF((SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID)), '%s')", tableName)
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_, res, err := dd.dc.Query(ddlSql)
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if err != nil {
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return "", err
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}
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// 建表ddl
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var builder strings.Builder
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for _, re := range res {
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builder.WriteString(re["COLUMN_VALUE"].(string))
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}
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// 表注释
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_, res, err = dd.dc.Query(fmt.Sprintf(`
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select OWNER, COMMENTS from ALL_TAB_COMMENTS where TABLE_TYPE='TABLE' and TABLE_NAME = '%s'
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and owner = (SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID))
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`, tableName))
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if err != nil {
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return "", err
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}
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for _, re := range res {
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// COMMENT ON TABLE "SYS_MENU" IS '菜单表';
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if re["COMMENTS"] != nil {
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tableComment := fmt.Sprintf("\n\nCOMMENT ON TABLE \"%s\".\"%s\" IS '%s';", re["OWNER"].(string), tableName, re["COMMENTS"].(string))
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builder.WriteString(tableComment)
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}
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}
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// 字段注释
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fieldSql := fmt.Sprintf(`
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SELECT OWNER, COLUMN_NAME, COMMENTS
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FROM USER_COL_COMMENTS
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WHERE OWNER = (SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID))
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AND TABLE_NAME = '%s'
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`, tableName)
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_, res, err = dd.dc.Query(fieldSql)
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if err != nil {
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return "", err
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}
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builder.WriteString("\n")
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for _, re := range res {
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// COMMENT ON COLUMN "SYS_MENU"."BIZ_CODE" IS '业务编码，应用编码1';
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if re["COMMENTS"] != nil {
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fieldComment := fmt.Sprintf("\nCOMMENT ON COLUMN \"%s\".\"%s\".\"%s\" IS '%s';", re["OWNER"].(string), tableName, re["COLUMN_NAME"].(string), re["COMMENTS"].(string))
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builder.WriteString(fieldComment)
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}
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}
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// 索引信息
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indexSql := fmt.Sprintf(`
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select indexdef(b.object_id,1) as INDEX_DEF from ALL_INDEXES a
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join ALL_objects b on a.owner = b.owner and b.object_name = a.index_name and b.object_type = 'INDEX'
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where a.owner = (SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID))
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and a.table_name = '%s'
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and indexdef(b.object_id,1) != '禁止查看系统定义的索引信息'
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`, tableName)
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_, res, err = dd.dc.Query(indexSql)
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if err != nil {
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return "", err
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}
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for _, re := range res {
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builder.WriteString("\n\n" + re["INDEX_DEF"].(string))
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}
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return builder.String(), 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 *DMDialect) 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, anyx.ConvString(re["SCHEMA_NAME"]))
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}
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return schemaNames, nil
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}
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// GetDbProgram 获取数据库程序模块，用于数据库备份与恢复
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func (dd *DMDialect) GetDbProgram() (dbi.DbProgram, error) {
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return nil, fmt.Errorf("该数据库类型不支持数据库备份与恢复: %v", dd.dc.Info.Type)
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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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)
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func (dd *DMDialect) BatchInsert(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
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// 执行批量insert sql
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// insert into "table_name" ("column1", "column2", ...) values (value1, value2, ...)
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dbType := dd.dc.Info.Type
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// 无需处理重复数据，直接执行批量insert
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if duplicateStrategy == dbi.DuplicateStrategyNone || duplicateStrategy == 0 {
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return dd.batchInsertSimple(dbType, tx, tableName, columns, values)
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} else { // 执行MERGE INTO语句
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return dd.batchInsertMerge(dbType, tx, tableName, columns, values)
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}
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}
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func (dd *DMDialect) batchInsertSimple(dbType dbi.DbType, tx *sql.Tx, tableName string, columns []string, values [][]any) (int64, error) {
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// 生成占位符字符串：如：(?,?)
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// 重复字符串并用逗号连接
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repeated := strings.Repeat("?,", len(columns))
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// 去除最后一个逗号，占位符由括号包裹
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placeholder := fmt.Sprintf("(%s)", strings.TrimSuffix(repeated, ","))
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sqlTemp := fmt.Sprintf("insert into %s (%s) values %s", dbType.QuoteIdentifier(tableName), strings.Join(columns, ","), placeholder)
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effRows := 0
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for _, value := range values {
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// 达梦数据库只能一条条的执行insert
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res, err := dd.dc.TxExec(tx, sqlTemp, value...)
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if err != nil {
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logx.Errorf("执行sql失败：%s, sql: [ %s ]", err.Error(), sqlTemp)
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}
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effRows += int(res)
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}
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// 执行批量insert sql
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return int64(effRows), nil
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}
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func (dd *DMDialect) batchInsertMerge(dbType dbi.DbType, tx *sql.Tx, tableName string, columns []string, values [][]any) (int64, error) {
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// 查询主键字段
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uniqueCols := make([]string, 0)
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caseSqls := make([]string, 0)
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tableCols, _ := dd.GetColumns(tableName)
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identityCols := make([]string, 0)
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for _, col := range tableCols {
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if col.IsPrimaryKey {
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uniqueCols = append(uniqueCols, col.ColumnName)
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caseSqls = append(caseSqls, fmt.Sprintf("( T1.%s = T2.%s )", dbType.QuoteIdentifier(col.ColumnName), dbType.QuoteIdentifier(col.ColumnName)))
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}
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if col.IsIdentity {
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// 自增字段不放入insert内，即使是设置了identity_insert on也不起作用
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identityCols = append(identityCols, dbType.QuoteIdentifier(col.ColumnName))
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}
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}
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// 查询唯一索引涉及到的字段，并组装到match条件内
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indexs, _ := dd.GetTableIndex(tableName)
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if indexs != nil {
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for _, index := range indexs {
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if index.IsUnique {
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cols := strings.Split(index.ColumnName, ",")
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tmp := make([]string, 0)
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for _, col := range cols {
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uniqueCols = append(uniqueCols, col)
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tmp = append(tmp, fmt.Sprintf(" T1.%s = T2.%s ", dbType.QuoteIdentifier(col), dbType.QuoteIdentifier(col)))
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}
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caseSqls = append(caseSqls, fmt.Sprintf("( %s )", strings.Join(tmp, " AND ")))
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}
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}
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}
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// 重复数据处理策略
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phs := make([]string, 0)
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insertVals := make([]string, 0)
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upds := make([]string, 0)
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insertCols := make([]string, 0)
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for _, column := range columns {
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phs = append(phs, fmt.Sprintf("? %s", column))
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if !collx.ArrayContains(uniqueCols, dbType.RemoveQuote(column)) {
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upds = append(upds, fmt.Sprintf("T1.%s = T2.%s", column, column))
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}
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if !collx.ArrayContains(identityCols, column) {
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insertCols = append(insertCols, fmt.Sprintf("%s", column))
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insertVals = append(insertVals, fmt.Sprintf("T2.%s", column))
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}
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}
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t2s := make([]string, 0)
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for i := 0; i < len(values); i++ {
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t2s = append(t2s, fmt.Sprintf("SELECT %s FROM dual", strings.Join(phs, ",")))
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}
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t2 := strings.Join(t2s, " UNION ALL ")
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sqlTemp := "MERGE INTO " + dbType.QuoteIdentifier(tableName) + " T1 USING (" + t2 + ") T2 ON " + strings.Join(caseSqls, " OR ")
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sqlTemp += "WHEN NOT MATCHED THEN INSERT (" + strings.Join(insertCols, ",") + ") VALUES (" + strings.Join(insertVals, ",") + ")"
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sqlTemp += "WHEN MATCHED THEN UPDATE SET " + strings.Join(upds, ",")
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// 把二维数组转为一维数组
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var args []any
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for _, v := range values {
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args = append(args, v...)
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}
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return dd.dc.TxExec(tx, sqlTemp, args...)
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}
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func (dd *DMDialect) GetDataConverter() dbi.DataConverter {
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return converter
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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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func (dd *DMDialect) CopyTable(copy *dbi.DbCopyTable) error {
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tableName := copy.TableName
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ddl, err := dd.GetTableDDL(tableName)
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if err != nil {
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return err
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}
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// 生成新表名,为老表明+_copy_时间戳
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newTableName := tableName + "_copy_" + time.Now().Format("20060102150405")
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// 替换新表名
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ddl = strings.ReplaceAll(ddl, fmt.Sprintf("\"%s\"", strings.ToUpper(tableName)), fmt.Sprintf("\"%s\"", strings.ToUpper(newTableName)))
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// 去除空格换行
|
||
ddl = stringx.TrimSpaceAndBr(ddl)
|
||
sqls, err := sqlparser.SplitStatementToPieces(ddl, sqlparser.WithDialect(dd.dc.Info.Type.Dialect()))
|
||
for _, sql := range sqls {
|
||
_, _ = dd.dc.Exec(sql)
|
||
}
|
||
|
||
// 复制数据
|
||
if copy.CopyData {
|
||
go func() {
|
||
// 设置允许填充自增列之后，显示指定列名可以插入自增列
|
||
_, _ = dd.dc.Exec(fmt.Sprintf("set identity_insert \"%s\" on", newTableName))
|
||
// 获取列名
|
||
columns, _ := dd.GetColumns(tableName)
|
||
columnArr := make([]string, 0)
|
||
for _, column := range columns {
|
||
columnArr = append(columnArr, fmt.Sprintf("\"%s\"", column.ColumnName))
|
||
}
|
||
columnStr := strings.Join(columnArr, ",")
|
||
// 插入新数据并显示指定列
|
||
_, _ = dd.dc.Exec(fmt.Sprintf("insert into \"%s\" (%s) select %s from \"%s\"", newTableName, columnStr, columnStr, tableName))
|
||
|
||
// 执行完成后关闭允许填充自增列
|
||
_, _ = dd.dc.Exec(fmt.Sprintf("set identity_insert \"%s\" off", newTableName))
|
||
}()
|
||
}
|
||
|
||
return err
|
||
}
|