gabotechs commented on code in PR #15345:
URL: https://github.com/apache/datafusion/pull/15345#discussion_r2007641902
##########
datafusion/substrait/src/logical_plan/consumer.rs:
##########
@@ -1975,6 +1975,13 @@ pub async fn from_substrait_agg_func(
let args = from_substrait_func_args(consumer, &f.arguments,
input_schema).await?;
+ // deal with situation that count(*) got no arguments
Review Comment:
The main reason is that DataFusion does not support aggregate functions with
no arguments:
https://github.com/apache/datafusion/blob/11838be5efa8607f762504c198615c54575b0593/datafusion/physical-expr/src/aggregate.rs#L100-L114
I imagine that this is the reason why it was there before.
If you do a similar operation and analyze DataFusion's logical plan
([link](https://datafusion-fiddle.vercel.app?q=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
4wMCksXG4gICgxNSwgJ0RhbmllbCcsICdNYXJ0aW5leicsICdkYW5pZWwubWFydGluZXpAY29tcGFueS5jb20nLCAnNjU0LTc4OS0zMjEwJywgJzIwMjAtMTEtMTAnLCAnU2FsZXNwZXJzb24nLCAnU2FsZXMnLCA2MDAwMC4wMCk7XG4iLCJzZWxlY3QiOiItLSBQdXQgeW91ciBzZWxlY3Qgc3RhdGVtZW50IGhlcmUgYW5kIGhpdCBDdHJsK0VudGVyIHRvIHN1Ym1pdC5cblxuRVhQTEFJTiBTRUxFQ1QgY291bnQoKSBGUk9NIGVtcGxveWVlcztcbiJ9)),
a similar `Int64(1)` argument is injected.
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