fix: mysql导出修复

server/internal/db/application/db_transfer.go

@@ -2,6 +2,7 @@ package application
 
 import (
 	"context"
+	"encoding/hex"
 	"fmt"
 	"mayfly-go/internal/db/dbm/dbi"
 	"mayfly-go/internal/db/domain/entity"
@@ -326,6 +327,8 @@ func (app *dbTransferAppImpl) transfer2Target(taskId uint64, targetConn *dbi.DbC
 		columnNames = append(columnNames, targetMeta.QuoteIdentifier(col.ColumnName))
 	}
 
+	dataHelper := targetMeta.GetDataHelper()
+
 	// 从目标库数据中取出源库字段对应的值
 	values := make([][]any, 0)
 	for _, record := range result {
@@ -342,6 +345,14 @@ func (app *dbTransferAppImpl) transfer2Target(taskId uint64, targetConn *dbi.DbC
 					}
 				}
 			}
+
+			if dataHelper.GetDataType(string(tc.DataType)) == dbi.DataTypeBlob {
+				decodeBytes, err := hex.DecodeString(val.(string))
+				if err == nil {
+					val = decodeBytes
+				}
+			}
+
 			rawValue = append(rawValue, val)
 		}
 		values = append(values, rawValue)

server/internal/db/dbm/dbi/conn.go

@@ -214,6 +214,9 @@ func valueConvert(data []byte, colType *sql.ColumnType) any {
 	if strings.Contains(colDatabaseTypeName, "bit") {
 		return data[0]
 	}
+	if colDatabaseTypeName == "blob" {
+		return fmt.Sprintf("%x", data)
+	}
 
 	// 这里把[]byte数据转成string
 	stringV := string(data)

server/internal/db/dbm/dbi/metadata.go

@@ -84,6 +84,13 @@ type Column struct {
 
 // 拼接数据类型与长度等。如varchar(2000)，decimal(20,2)
 func (c *Column) GetColumnType() string {
+	// 哪些mysql数据类型不需要添加字段长度
+	if collx.ArrayAnyMatches([]string{"int", "blob", "float", "double", "date", "year", "json"}, string(c.DataType)) {
+		return string(c.DataType)
+	}
+	if c.DataType == "timestamp" {
+		return "timestamp(6)"
+	}
 	if c.CharMaxLength > 0 {
 		return fmt.Sprintf("%s(%d)", c.DataType, c.CharMaxLength)
 	}
@@ -124,6 +131,7 @@ const (
 	CommonTypeVarbinary  ColumnDataType = "varbinary"
 
 	CommonTypeInt      ColumnDataType = "int"
+	CommonTypeBit      ColumnDataType = "bit"
 	CommonTypeSmallint ColumnDataType = "smallint"
 	CommonTypeTinyint  ColumnDataType = "tinyint"
 	CommonTypeNumber   ColumnDataType = "number"
@@ -146,6 +154,7 @@ const (
 	DataTypeDate     DataType = "date"
 	DataTypeTime     DataType = "time"
 	DataTypeDateTime DataType = "datetime"
+	DataTypeBlob     DataType = "blob"
 )
 
 // 列数据处理帮助方法

server/internal/db/dbm/mysql/helper.go

@@ -19,6 +19,8 @@ var (
 	// 时间类型
 	timeRegexp = regexp.MustCompile(`(?i)time`)
 
+	blobRegexp = regexp.MustCompile(`(?i)blob`)
+
 	//  mysql数据类型 映射 公共数据类型
 	commonColumnTypeMap = map[string]dbi.ColumnDataType{
 		"bigint":     dbi.CommonTypeBigint,
@@ -37,6 +39,7 @@ var (
 		"longtext":   dbi.CommonTypeLongtext,
 		"mediumblob": dbi.CommonTypeBlob,
 		"mediumtext": dbi.CommonTypeText,
+		"bit":        dbi.CommonTypeBit,
 		"set":        dbi.CommonTypeVarchar,
 		"smallint":   dbi.CommonTypeSmallint,
 		"text":       dbi.CommonTypeText,
@@ -60,6 +63,7 @@ var (
 		dbi.CommonTypeMediumtext: "text",
 		dbi.CommonTypeVarbinary:  "varbinary",
 		dbi.CommonTypeInt:        "int",
+		dbi.CommonTypeBit:        "bit",
 		dbi.CommonTypeSmallint:   "smallint",
 		dbi.CommonTypeTinyint:    "tinyint",
 		dbi.CommonTypeNumber:     "decimal",
@@ -92,6 +96,10 @@ func (dc *DataHelper) GetDataType(dbColumnType string) dbi.DataType {
 	if timeRegexp.MatchString(dbColumnType) {
 		return dbi.DataTypeTime
 	}
+	// blob类型
+	if blobRegexp.MatchString(dbColumnType) {
+		return dbi.DataTypeBlob
+	}
 	return dbi.DataTypeString
 }
 
@@ -157,6 +165,8 @@ func (dc *DataHelper) WrapValue(dbColumnValue any, dataType dbi.DataType) string
 	case dbi.DataTypeDate, dbi.DataTypeDateTime, dbi.DataTypeTime:
 		// mysql时间类型无需格式化
 		return fmt.Sprintf("'%s'", dbColumnValue)
+	case dbi.DataTypeBlob:
+		return fmt.Sprintf("unhex('%s')", dbColumnValue)
 	}
 	return fmt.Sprintf("'%s'", dbColumnValue)
 }