Run Create in two goroutines

[norguhtar]

Description

When i try use Create for batch as discribed in README it work fine. But when i run Create in two goroutines simultaneously this run transaction in second goroutne, and this broken. In logs i'm get

[clickhouse][connect=3][begin] tx=false, data=false
[clickhouse][connect=3][commit] tx=true, data=false

And got error

data request has already been prepared in transaction

If i'm disable transaction support via gorm. Just add

SkipDefaultTransaction: true

I can't use batch mode

insert statement supported only in the batch mode (use begin/commit)

But clickhouse not suport transaction. But if i try use batch fro clickhouse i should enable transaction. It's really strange thing.

[jinzhu]

Can you create a reproducible PR?