When using `scany` I encountered the following case. This seems to fix it.
Looks like null `jsonb` columns cause the problem. If you create a table like below you can see that the following code fails. Is this expected?
```sql
CREATE TABLE test (
a int4 NULL,
b int4 NULL,
c jsonb NULL
);
INSERT INTO test (a, b, c) VALUES (1, null, null);
```
```go
package main
import (
"context"
"log"
"github.com/georgysavva/scany/v2/pgxscan"
"github.com/jackc/pgx/v5"
)
func main() {
var rows []map[string]interface{}
conn, _ := pgx.Connect(context.Background(), , ts.PGURL().String())
// this will fail with can't scan into dest[0]: cannot scan NULL into *interface {}
err := pgxscan.Select(context.Background(), conn, &rows, `SELECT c from test`)
// this works
// err = pgxscan.Select(context.Background(), conn, &rows, `SELECT a,b from test`)
if err != nil {
panic(err)
}
log.Printf("%+v", rows)
}
```
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