Bulk Insert get errors in inserting data into HANA about go-hdb

[stfnmllr]

Please provide a proper issue description with an code example to reproduce the error.
Anyway, referring to the issue headline and if the log output is correct
>>> unsupported lobCESU8Type conversion: string e1itpn70fg
it looks like an attempt to insert a DB LOB type via a Go string parameter which is not supported. Please refer to the documentation and the LOB examples provided in go-hdb documentation.

We create one table and convert the type to lob as below. and insert the data as the bulk insert.
create column table T2 (a int, b varchar(10);
alter table T2 alter (B clob page loadable) online;
testSql := "InsertData: INSERT INTO T2 VALUES($2)"
func bulkInsert(db *sql.DB, testSql string) {
bulkInsertString := testSql
bulkInsertString = strings.Replace(bulkInsertString, "$2", "?, ?", -1)
bulkInsertString = strings.Replace(bulkInsertString, "INSERT", "BULK INSERT", -1)

log.Info(bulkInsertString)
stmt, err := db.Prepare(bulkInsertString) // Prepare bulk query.
if err != nil {
	log.Fatal(err)
}
defer stmt.Close()

for i := 0; i < 10000; i++ {
	randValue := CreateRandomString(10)
	if _, err := stmt.Exec(i, randValue); err != nil {
		log.Fatal(err)
	}
}
// Call final stmt.Exec().
if _, err := stmt.Exec(); err != nil {
	log.Fatal(err)
}

}

func randomResult(typeList []string) string {
colTypeIndex := rand.Intn(len(typeList))
return typeList[colTypeIndex]
}

[stfnmllr]

Thanks for the explanation! Like presumed you are using a string variable (randValue) as argument for a CLOB field but you need to use a driver.Lob field instead (please see https://godoc.org/github.com/SAP/go-hdb/driver#Lob and the examples for reference).
To use 'bulk inserts' with Lob arguments please take care to use the latest go-hdb version (>= 0.100.13).
Tip: do not use LOB fields if not needed as you definitely get an negative impact on performance (at least the double amount of client - server roundtrips) compared to standard fields like a varchar.