mirror of
https://gitee.com/dromara/mayfly-go
synced 2025-11-03 07:50:25 +08:00
f2b6e15cf4
* feat: 优化数据库 BINLOG 同步机制 * feat: 删除数据库实例前需删除关联的数据库备份与恢复任务 * refactor: 重构数据库备份与恢复模块 * feat: 定时清理数据库备份历史和本地 Binlog 文件 * feat: 压缩数据库备份文件
374 lines
11 KiB
Go
374 lines
11 KiB
Go
package dm
|
||
|
||
import (
|
||
"database/sql"
|
||
"fmt"
|
||
"mayfly-go/internal/db/dbm/dbi"
|
||
"mayfly-go/pkg/errorx"
|
||
"mayfly-go/pkg/logx"
|
||
"mayfly-go/pkg/utils/anyx"
|
||
"mayfly-go/pkg/utils/collx"
|
||
"mayfly-go/pkg/utils/stringx"
|
||
"regexp"
|
||
"strings"
|
||
"time"
|
||
|
||
"github.com/kanzihuang/vitess/go/vt/sqlparser"
|
||
|
||
_ "gitee.com/chunanyong/dm"
|
||
)
|
||
|
||
const (
|
||
DM_META_FILE = "metasql/dm_meta.sql"
|
||
DM_DB_SCHEMAS = "DM_DB_SCHEMAS"
|
||
DM_TABLE_INFO_KEY = "DM_TABLE_INFO"
|
||
DM_INDEX_INFO_KEY = "DM_INDEX_INFO"
|
||
DM_COLUMN_MA_KEY = "DM_COLUMN_MA"
|
||
)
|
||
|
||
type DMDialect struct {
|
||
dc *dbi.DbConn
|
||
}
|
||
|
||
func (dd *DMDialect) GetDbServer() (*dbi.DbServer, error) {
|
||
_, res, err := dd.dc.Query("select * from v$instance")
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
ds := &dbi.DbServer{
|
||
Version: anyx.ConvString(res[0]["SVR_VERSION"]),
|
||
}
|
||
return ds, nil
|
||
}
|
||
|
||
func (dd *DMDialect) GetDbNames() ([]string, error) {
|
||
_, res, err := dd.dc.Query("SELECT name AS DBNAME FROM v$database")
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
databases := make([]string, 0)
|
||
for _, re := range res {
|
||
databases = append(databases, anyx.ConvString(re["DBNAME"]))
|
||
}
|
||
|
||
return databases, nil
|
||
}
|
||
|
||
// 获取表基础元信息, 如表名等
|
||
func (dd *DMDialect) GetTables() ([]dbi.Table, error) {
|
||
|
||
// 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
|
||
// _, _, err := pd.dc.Query("dbms_stats.GATHER_SCHEMA_stats(SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID))")
|
||
|
||
// 查询表信息
|
||
_, res, err := dd.dc.Query(dbi.GetLocalSql(DM_META_FILE, DM_TABLE_INFO_KEY))
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
tables := make([]dbi.Table, 0)
|
||
for _, re := range res {
|
||
tables = append(tables, dbi.Table{
|
||
TableName: anyx.ConvString(re["TABLE_NAME"]),
|
||
TableComment: anyx.ConvString(re["TABLE_COMMENT"]),
|
||
CreateTime: anyx.ConvString(re["CREATE_TIME"]),
|
||
TableRows: anyx.ConvInt(re["TABLE_ROWS"]),
|
||
DataLength: anyx.ConvInt64(re["DATA_LENGTH"]),
|
||
IndexLength: anyx.ConvInt64(re["INDEX_LENGTH"]),
|
||
})
|
||
}
|
||
return tables, nil
|
||
}
|
||
|
||
// 获取列元信息, 如列名等
|
||
func (dd *DMDialect) GetColumns(tableNames ...string) ([]dbi.Column, error) {
|
||
dbType := dd.dc.Info.Type
|
||
tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
|
||
return fmt.Sprintf("'%s'", dbType.RemoveQuote(val))
|
||
}), ",")
|
||
|
||
_, res, err := dd.dc.Query(fmt.Sprintf(dbi.GetLocalSql(DM_META_FILE, DM_COLUMN_MA_KEY), tableName))
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
columns := make([]dbi.Column, 0)
|
||
for _, re := range res {
|
||
columns = append(columns, dbi.Column{
|
||
TableName: anyx.ConvString(re["TABLE_NAME"]),
|
||
ColumnName: anyx.ConvString(re["COLUMN_NAME"]),
|
||
ColumnType: anyx.ConvString(re["COLUMN_TYPE"]),
|
||
ColumnComment: anyx.ConvString(re["COLUMN_COMMENT"]),
|
||
Nullable: anyx.ConvString(re["NULLABLE"]),
|
||
IsPrimaryKey: anyx.ConvInt(re["IS_PRIMARY_KEY"]) == 1,
|
||
IsIdentity: anyx.ConvInt(re["IS_IDENTITY"]) == 1,
|
||
ColumnDefault: anyx.ConvString(re["COLUMN_DEFAULT"]),
|
||
NumScale: anyx.ConvString(re["NUM_SCALE"]),
|
||
})
|
||
}
|
||
return columns, nil
|
||
}
|
||
|
||
func (dd *DMDialect) GetPrimaryKey(tablename string) (string, error) {
|
||
columns, err := dd.GetColumns(tablename)
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
if len(columns) == 0 {
|
||
return "", errorx.NewBiz("[%s] 表不存在", tablename)
|
||
}
|
||
for _, v := range columns {
|
||
if v.IsPrimaryKey {
|
||
return v.ColumnName, nil
|
||
}
|
||
}
|
||
|
||
return columns[0].ColumnName, nil
|
||
}
|
||
|
||
// 获取表索引信息
|
||
func (dd *DMDialect) GetTableIndex(tableName string) ([]dbi.Index, error) {
|
||
_, res, err := dd.dc.Query(fmt.Sprintf(dbi.GetLocalSql(DM_META_FILE, DM_INDEX_INFO_KEY), tableName))
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
indexs := make([]dbi.Index, 0)
|
||
for _, re := range res {
|
||
indexs = append(indexs, dbi.Index{
|
||
IndexName: anyx.ConvString(re["INDEX_NAME"]),
|
||
ColumnName: anyx.ConvString(re["COLUMN_NAME"]),
|
||
IndexType: anyx.ConvString(re["INDEX_TYPE"]),
|
||
IndexComment: anyx.ConvString(re["INDEX_COMMENT"]),
|
||
IsUnique: anyx.ConvInt(re["IS_UNIQUE"]) == 1,
|
||
SeqInIndex: anyx.ConvInt(re["SEQ_IN_INDEX"]),
|
||
})
|
||
}
|
||
// 把查询结果以索引名分组，索引字段以逗号连接
|
||
result := make([]dbi.Index, 0)
|
||
key := ""
|
||
for _, v := range indexs {
|
||
// 当前的索引名
|
||
in := v.IndexName
|
||
if key == in {
|
||
// 索引字段已根据名称和顺序排序，故取最后一个即可
|
||
i := len(result) - 1
|
||
// 同索引字段以逗号连接
|
||
result[i].ColumnName = result[i].ColumnName + "," + v.ColumnName
|
||
} else {
|
||
key = in
|
||
result = append(result, v)
|
||
}
|
||
}
|
||
return result, nil
|
||
}
|
||
|
||
// 获取建表ddl
|
||
func (dd *DMDialect) GetTableDDL(tableName string) (string, error) {
|
||
ddlSql := fmt.Sprintf("CALL SP_TABLEDEF((SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID)), '%s')", tableName)
|
||
_, res, err := dd.dc.Query(ddlSql)
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
// 建表ddl
|
||
var builder strings.Builder
|
||
for _, re := range res {
|
||
builder.WriteString(re["COLUMN_VALUE"].(string))
|
||
}
|
||
|
||
// 表注释
|
||
_, res, err = dd.dc.Query(fmt.Sprintf(`
|
||
select OWNER, COMMENTS from ALL_TAB_COMMENTS where TABLE_TYPE='TABLE' and TABLE_NAME = '%s'
|
||
and owner = (SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID))
|
||
`, tableName))
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
for _, re := range res {
|
||
// COMMENT ON TABLE "SYS_MENU" IS '菜单表';
|
||
if re["COMMENTS"] != nil {
|
||
tableComment := fmt.Sprintf("\n\nCOMMENT ON TABLE \"%s\".\"%s\" IS '%s';", re["OWNER"].(string), tableName, re["COMMENTS"].(string))
|
||
builder.WriteString(tableComment)
|
||
}
|
||
}
|
||
|
||
// 字段注释
|
||
fieldSql := fmt.Sprintf(`
|
||
SELECT OWNER, COLUMN_NAME, COMMENTS
|
||
FROM USER_COL_COMMENTS
|
||
WHERE OWNER = (SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID))
|
||
AND TABLE_NAME = '%s'
|
||
`, tableName)
|
||
_, res, err = dd.dc.Query(fieldSql)
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
|
||
builder.WriteString("\n")
|
||
for _, re := range res {
|
||
// COMMENT ON COLUMN "SYS_MENU"."BIZ_CODE" IS '业务编码，应用编码1';
|
||
if re["COMMENTS"] != nil {
|
||
fieldComment := fmt.Sprintf("\nCOMMENT ON COLUMN \"%s\".\"%s\".\"%s\" IS '%s';", re["OWNER"].(string), tableName, re["COLUMN_NAME"].(string), re["COMMENTS"].(string))
|
||
builder.WriteString(fieldComment)
|
||
}
|
||
}
|
||
|
||
// 索引信息
|
||
indexSql := fmt.Sprintf(`
|
||
select indexdef(b.object_id,1) as INDEX_DEF from ALL_INDEXES a
|
||
join ALL_objects b on a.owner = b.owner and b.object_name = a.index_name and b.object_type = 'INDEX'
|
||
where a.owner = (SELECT SF_GET_SCHEMA_NAME_BY_ID(CURRENT_SCHID))
|
||
and a.table_name = '%s'
|
||
and indexdef(b.object_id,1) != '禁止查看系统定义的索引信息'
|
||
`, tableName)
|
||
_, res, err = dd.dc.Query(indexSql)
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
for _, re := range res {
|
||
builder.WriteString("\n\n" + re["INDEX_DEF"].(string))
|
||
}
|
||
|
||
return builder.String(), nil
|
||
}
|
||
|
||
// 获取DM当前连接的库可访问的schemaNames
|
||
func (dd *DMDialect) GetSchemas() ([]string, error) {
|
||
sql := dbi.GetLocalSql(DM_META_FILE, DM_DB_SCHEMAS)
|
||
_, res, err := dd.dc.Query(sql)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
schemaNames := make([]string, 0)
|
||
for _, re := range res {
|
||
schemaNames = append(schemaNames, anyx.ConvString(re["SCHEMA_NAME"]))
|
||
}
|
||
return schemaNames, nil
|
||
}
|
||
|
||
// GetDbProgram 获取数据库程序模块，用于数据库备份与恢复
|
||
func (dd *DMDialect) GetDbProgram() (dbi.DbProgram, error) {
|
||
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)
|
||
}
|
||
|
||
var (
|
||
// 数字类型
|
||
numberRegexp = regexp.MustCompile(`(?i)int|double|float|number|decimal|byte|bit`)
|
||
// 日期时间类型
|
||
datetimeRegexp = regexp.MustCompile(`(?i)datetime|timestamp`)
|
||
// 日期类型
|
||
dateRegexp = regexp.MustCompile(`(?i)date`)
|
||
// 时间类型
|
||
timeRegexp = regexp.MustCompile(`(?i)time`)
|
||
)
|
||
|
||
func (dd *DMDialect) BatchInsert(tx *sql.Tx, tableName string, columns []string, values [][]any) (int64, error) {
|
||
// 执行批量insert sql
|
||
// insert into "table_name" ("column1", "column2", ...) values (value1, value2, ...)
|
||
|
||
// 生成占位符字符串：如：(?,?)
|
||
// 重复字符串并用逗号连接
|
||
repeated := strings.Repeat("?,", len(columns))
|
||
// 去除最后一个逗号，占位符由括号包裹
|
||
placeholder := fmt.Sprintf("(%s)", strings.TrimSuffix(repeated, ","))
|
||
|
||
sqlTemp := fmt.Sprintf("insert into %s (%s) values %s", dd.dc.Info.Type.QuoteIdentifier(tableName), strings.Join(columns, ","), placeholder)
|
||
effRows := 0
|
||
for _, value := range values {
|
||
// 达梦数据库只能一条条的执行insert
|
||
er, err := dd.dc.TxExec(tx, sqlTemp, value...)
|
||
if err != nil {
|
||
logx.Errorf("执行sql失败：%s", err.Error())
|
||
return int64(effRows), err
|
||
}
|
||
effRows += int(er)
|
||
}
|
||
// 执行批量insert sql
|
||
return int64(effRows), nil
|
||
}
|
||
|
||
func (dd *DMDialect) GetDataConverter() dbi.DataConverter {
|
||
return new(DataConverter)
|
||
}
|
||
|
||
type DataConverter struct {
|
||
}
|
||
|
||
func (dd *DataConverter) GetDataType(dbColumnType string) dbi.DataType {
|
||
if numberRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeNumber
|
||
}
|
||
if datetimeRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeDateTime
|
||
}
|
||
if dateRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeDate
|
||
}
|
||
if timeRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeTime
|
||
}
|
||
return dbi.DataTypeString
|
||
}
|
||
|
||
func (dd *DataConverter) FormatData(dbColumnValue any, dataType dbi.DataType) string {
|
||
str := anyx.ToString(dbColumnValue)
|
||
switch dataType {
|
||
case dbi.DataTypeDateTime: // "2024-01-02T22:08:22.275697+08:00"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.DateTime)
|
||
case dbi.DataTypeDate: // "2024-01-02T00:00:00+08:00"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.DateOnly)
|
||
case dbi.DataTypeTime: // "0000-01-01T22:08:22.275688+08:00"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.TimeOnly)
|
||
}
|
||
return str
|
||
}
|
||
|
||
func (dd *DataConverter) ParseData(dbColumnValue any, dataType dbi.DataType) any {
|
||
return dbColumnValue
|
||
}
|
||
|
||
func (dd *DMDialect) CopyTable(copy *dbi.DbCopyTable) error {
|
||
tableName := copy.TableName
|
||
ddl, err := dd.GetTableDDL(tableName)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
// 生成新表名,为老表明+_copy_时间戳
|
||
newTableName := tableName + "_copy_" + time.Now().Format("20060102150405")
|
||
|
||
// 替换新表名
|
||
ddl = strings.ReplaceAll(ddl, fmt.Sprintf("\"%s\"", strings.ToUpper(tableName)), fmt.Sprintf("\"%s\"", strings.ToUpper(newTableName)))
|
||
// 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
|
||
}
|