youngoli commented on PR #16818:
URL: https://github.com/apache/beam/pull/16818#issuecomment-1146363217
I added a test that reads from a Query, and while testing in my own
environment I'm getting weird results. The elements output from a query read
have all fields as pointers because SQL queries don't match the table's schema.
That's pretty normal. But when I made an equivalent struct in Go, I get errors
when decoding into that struct, even though all the fields seem to be matching
exactly:
```
panic: reflect: Call using struct { Counter *int64 "beam:\"counter\"";
Rand_data *struct { Flip *bool "beam:\"flip\""; Num *int64 "beam:\"num\""; Word
*string "beam:\"word\"" } "beam:\"rand_data\"" } as type bigquery.TestRowPtrs
Full error:
while executing Process for Plan[s08-67]:
2: DataSink[S[ptransform-65@localhost:12371]]
Coder:W;coder-80<LP;coder-81<R[bigquery.TestRow]>>!GWC
3: PCollection[pcollection-72] Out:[2]
4: ParDo[bigquery.ReadFromQueryPipeline.func1] Out:[2]
1: DataSource[S[ptransform-64@localhost:12371], 0]
Coder:W;coder-76<LP;coder-77<R[struct { Counter *int64 "beam:\"counter\"";
Rand_data *struct { Flip *bool "beam:\"flip\""; Num *int64 "beam:\"num\""; Word
*string "beam:\"word\"" } "beam:\"rand_data\"" }]>>!GWC Out:4
caused by:
panic: reflect: Call using struct { Counter *int64 "beam:\"counter\"";
Rand_data *struct { Flip *bool "beam:\"flip\""; Num *int64 "beam:\"num\""; Word
*string "beam:\"word\"" } "beam:\"rand_data\"" } as type bigquery.TestRowPtrs
goroutine 60 [running]:
runtime/debug.Stack()
...
```
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