Uncoalesced tables with no partitioning columns do not render

[devinrsmith]

As of deephaven/deephaven-core#5078, the following code

from deephaven import parquet

x = parquet.read("my-file.parquet")
x_coalesced = x.coalesce()

no longer renders x in the UI - it just spins. x is of type io.deephaven.engine.table.impl.SimpleSourceTable, which is an uncoalesced table (with a single / implicit partition?).

[mofojed]

Reproducible using just this snippet:

from deephaven import parquet, new_table
parquet.write(new_table({"Foo": [1, 2, 3]}), "my-table.parquet")
x = parquet.read("my-table.parquet")

@rcaudy I want to confirm I'm fixing the right thing. So in the example above, the table isUncoalesced, but it has no partition columns. In that case, we're just supposed to fetch the whole table, correct? No partition selector?

[rcaudy]

Reproducible using just this snippet:

from deephaven import parquet, new_table
parquet.write(new_table({"Foo": [1, 2, 3]}), "my-table.parquet")
x = parquet.read("my-table.parquet")

@rcaudy I want to confirm I'm fixing the right thing. So in the example above, the table isUncoalesced, but it has no partition columns. In that case, we're just supposed to fetch the whole table, correct? No partition selector?

Yes, exactly. That's the only way to turn it into something you can render.