mirror of
https://gitee.com/dromara/mayfly-go
synced 2025-11-04 00:10:25 +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
339 lines
10 KiB
Go
339 lines
10 KiB
Go
package postgres
|
||
|
||
import (
|
||
"database/sql"
|
||
"fmt"
|
||
"mayfly-go/internal/db/dbm/dbi"
|
||
"mayfly-go/pkg/errorx"
|
||
"mayfly-go/pkg/utils/anyx"
|
||
"mayfly-go/pkg/utils/collx"
|
||
"regexp"
|
||
"strings"
|
||
"time"
|
||
)
|
||
|
||
const (
|
||
PGSQL_META_FILE = "metasql/pgsql_meta.sql"
|
||
PGSQL_DB_SCHEMAS = "PGSQL_DB_SCHEMAS"
|
||
PGSQL_TABLE_INFO_KEY = "PGSQL_TABLE_INFO"
|
||
PGSQL_INDEX_INFO_KEY = "PGSQL_INDEX_INFO"
|
||
PGSQL_COLUMN_MA_KEY = "PGSQL_COLUMN_MA"
|
||
PGSQL_TABLE_DDL_KEY = "PGSQL_TABLE_DDL_FUNC"
|
||
)
|
||
|
||
type PgsqlDialect struct {
|
||
dc *dbi.DbConn
|
||
}
|
||
|
||
func (md *PgsqlDialect) GetDbServer() (*dbi.DbServer, error) {
|
||
_, res, err := md.dc.Query("SHOW server_version")
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
ds := &dbi.DbServer{
|
||
Version: anyx.ConvString(res[0]["server_version"]),
|
||
}
|
||
return ds, nil
|
||
}
|
||
|
||
func (md *PgsqlDialect) GetDbNames() ([]string, error) {
|
||
_, res, err := md.dc.Query("SELECT datname AS dbname FROM pg_database WHERE datistemplate = false AND has_database_privilege(datname, 'CONNECT')")
|
||
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 (md *PgsqlDialect) GetTables() ([]dbi.Table, error) {
|
||
_, res, err := md.dc.Query(dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_TABLE_INFO_KEY))
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
tables := make([]dbi.Table, 0)
|
||
for _, re := range res {
|
||
tables = append(tables, dbi.Table{
|
||
TableName: re["tableName"].(string),
|
||
TableComment: anyx.ConvString(re["tableComment"]),
|
||
CreateTime: anyx.ConvString(re["createTime"]),
|
||
TableRows: anyx.ConvInt(re["tableRows"]),
|
||
DataLength: anyx.ConvInt64(re["dataLength"]),
|
||
IndexLength: anyx.ConvInt64(re["indexLength"]),
|
||
})
|
||
}
|
||
return tables, nil
|
||
}
|
||
|
||
// 获取列元信息, 如列名等
|
||
func (md *PgsqlDialect) GetColumns(tableNames ...string) ([]dbi.Column, error) {
|
||
dbType := md.dc.Info.Type
|
||
tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
|
||
return fmt.Sprintf("'%s'", dbType.RemoveQuote(val))
|
||
}), ",")
|
||
|
||
_, res, err := md.dc.Query(fmt.Sprintf(dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_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["tableName"]),
|
||
ColumnName: anyx.ConvString(re["columnName"]),
|
||
ColumnType: anyx.ConvString(re["columnType"]),
|
||
ColumnComment: anyx.ConvString(re["columnComment"]),
|
||
Nullable: anyx.ConvString(re["nullable"]),
|
||
IsPrimaryKey: anyx.ConvInt(re["isPrimaryKey"]) == 1,
|
||
IsIdentity: anyx.ConvInt(re["isIdentity"]) == 1,
|
||
ColumnDefault: anyx.ConvString(re["columnDefault"]),
|
||
NumScale: anyx.ConvString(re["numScale"]),
|
||
})
|
||
}
|
||
return columns, nil
|
||
}
|
||
|
||
func (md *PgsqlDialect) GetPrimaryKey(tablename string) (string, error) {
|
||
columns, err := md.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 (md *PgsqlDialect) GetTableIndex(tableName string) ([]dbi.Index, error) {
|
||
_, res, err := md.dc.Query(fmt.Sprintf(dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_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["indexName"]),
|
||
ColumnName: anyx.ConvString(re["columnName"]),
|
||
IndexType: anyx.ConvString(re["IndexType"]),
|
||
IndexComment: anyx.ConvString(re["indexComment"]),
|
||
IsUnique: anyx.ConvInt(re["isUnique"]) == 1,
|
||
SeqInIndex: anyx.ConvInt(re["seqInIndex"]),
|
||
})
|
||
}
|
||
// 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 (md *PgsqlDialect) GetTableDDL(tableName string) (string, error) {
|
||
_, err := md.dc.Exec(dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_TABLE_DDL_KEY))
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
|
||
_, schemaRes, _ := md.dc.Query("select current_schema() as schema")
|
||
schemaName := schemaRes[0]["schema"].(string)
|
||
|
||
ddlSql := fmt.Sprintf("select showcreatetable('%s','%s') as sql", schemaName, tableName)
|
||
_, res, err := md.dc.Query(ddlSql)
|
||
if err != nil {
|
||
return "", err
|
||
}
|
||
|
||
return res[0]["sql"].(string), nil
|
||
}
|
||
|
||
// 获取pgsql当前连接的库可访问的schemaNames
|
||
func (md *PgsqlDialect) GetSchemas() ([]string, error) {
|
||
sql := dbi.GetLocalSql(PGSQL_META_FILE, PGSQL_DB_SCHEMAS)
|
||
_, res, err := md.dc.Query(sql)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
schemaNames := make([]string, 0)
|
||
for _, re := range res {
|
||
schemaNames = append(schemaNames, anyx.ConvString(re["schemaName"]))
|
||
}
|
||
return schemaNames, nil
|
||
}
|
||
|
||
// GetDbProgram 获取数据库程序模块，用于数据库备份与恢复
|
||
func (md *PgsqlDialect) 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", md.dc.Info.Type)
|
||
}
|
||
|
||
func (md *PgsqlDialect) BatchInsert(tx *sql.Tx, tableName string, columns []string, values [][]any) (int64, error) {
|
||
// 执行批量insert sql，跟mysql一样 pg或高斯支持批量insert语法
|
||
// insert into table_name (column1, column2, ...) values (value1, value2, ...), (value1, value2, ...), ...
|
||
|
||
// 把二维数组转为一维数组
|
||
var args []any
|
||
for _, v := range values {
|
||
args = append(args, v...)
|
||
}
|
||
|
||
// 构建占位符字符串 "($1, $2, $3), ($4, $5, $6), ..." 用于指定参数
|
||
var placeholders []string
|
||
for i := 0; i < len(args); i += len(columns) {
|
||
var placeholder []string
|
||
for j := 0; j < len(columns); j++ {
|
||
placeholder = append(placeholder, fmt.Sprintf("$%d", i+j+1))
|
||
}
|
||
placeholders = append(placeholders, "("+strings.Join(placeholder, ", ")+")")
|
||
}
|
||
|
||
sqlStr := fmt.Sprintf("insert into %s (%s) values %s", md.dc.Info.Type.QuoteIdentifier(tableName), strings.Join(columns, ","), strings.Join(placeholders, ", "))
|
||
// 执行批量insert sql
|
||
|
||
return md.dc.TxExec(tx, sqlStr, args...)
|
||
}
|
||
|
||
func (md *PgsqlDialect) GetDataConverter() dbi.DataConverter {
|
||
return new(DataConverter)
|
||
}
|
||
|
||
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`)
|
||
)
|
||
|
||
type DataConverter struct {
|
||
}
|
||
|
||
func (dc *DataConverter) GetDataType(dbColumnType string) dbi.DataType {
|
||
if numberRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeNumber
|
||
}
|
||
// 日期时间类型
|
||
if datetimeRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeDateTime
|
||
}
|
||
// 日期类型
|
||
if dateRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeDate
|
||
}
|
||
// 时间类型
|
||
if timeRegexp.MatchString(dbColumnType) {
|
||
return dbi.DataTypeTime
|
||
}
|
||
return dbi.DataTypeString
|
||
}
|
||
|
||
func (dc *DataConverter) FormatData(dbColumnValue any, dataType dbi.DataType) string {
|
||
str := fmt.Sprintf("%v", dbColumnValue)
|
||
switch dataType {
|
||
case dbi.DataTypeDateTime: // "2024-01-02T22:16:28.545377+08:00"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.DateTime)
|
||
case dbi.DataTypeDate: // "2024-01-02T00:00:00Z"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.DateOnly)
|
||
case dbi.DataTypeTime: // "0000-01-01T22:16:28.545075+08:00"
|
||
res, _ := time.Parse(time.RFC3339, str)
|
||
return res.Format(time.TimeOnly)
|
||
}
|
||
return anyx.ConvString(dbColumnValue)
|
||
}
|
||
|
||
func (dc *DataConverter) ParseData(dbColumnValue any, dataType dbi.DataType) any {
|
||
return dbColumnValue
|
||
}
|
||
|
||
func (md *PgsqlDialect) IsGauss() bool {
|
||
return strings.Contains(md.dc.Info.Params, "gauss")
|
||
}
|
||
|
||
func (md *PgsqlDialect) CopyTable(copy *dbi.DbCopyTable) error {
|
||
tableName := copy.TableName
|
||
// 生成新表名,为老表明+_copy_时间戳
|
||
newTableName := tableName + "_copy_" + time.Now().Format("20060102150405")
|
||
// 执行根据旧表创建新表
|
||
_, err := md.dc.Exec(fmt.Sprintf("create table %s (like %s)", newTableName, tableName))
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
// 复制数据
|
||
if copy.CopyData {
|
||
go func() {
|
||
_, _ = md.dc.Exec(fmt.Sprintf("insert into %s select * from %s", newTableName, tableName))
|
||
}()
|
||
}
|
||
|
||
// 查询旧表的自增字段名 重新设置新表的序列序列器
|
||
_, res, err := md.dc.Query(fmt.Sprintf("select column_name from information_schema.columns where table_name = '%s' and column_default like 'nextval%%'", tableName))
|
||
if err != nil {
|
||
return err
|
||
}
|
||
|
||
for _, re := range res {
|
||
colName := anyx.ConvString(re["column_name"])
|
||
if colName != "" {
|
||
|
||
// 查询自增列当前最大值
|
||
_, maxRes, err := md.dc.Query(fmt.Sprintf("select max(%s) max_val from %s", colName, tableName))
|
||
if err != nil {
|
||
return err
|
||
}
|
||
maxVal := anyx.ConvInt(maxRes[0]["max_val"])
|
||
// 序列起始值为1或当前最大值+1
|
||
if maxVal <= 0 {
|
||
maxVal = 1
|
||
} else {
|
||
maxVal += 1
|
||
}
|
||
|
||
// 之所以不用tableName_colName_seq是因为gauss会自动创建同名的序列，且无法修改序列起始值，所以直接使用新序列值
|
||
newSeqName := fmt.Sprintf("%s_%s_copy_seq", newTableName, colName)
|
||
|
||
// 创建自增序列，当前最大值为旧表最大值
|
||
_, err = md.dc.Exec(fmt.Sprintf("CREATE SEQUENCE %s START %d INCREMENT 1", newSeqName, maxVal))
|
||
if err != nil {
|
||
return err
|
||
}
|
||
// 将新表的自增主键序列与主键列相关联
|
||
_, err = md.dc.Exec(fmt.Sprintf("alter table %s alter column %s set default nextval('%s')", newTableName, colName, newSeqName))
|
||
if err != nil {
|
||
return err
|
||
}
|
||
}
|
||
}
|
||
return err
|
||
}
|