Fix coalescing above leaf nodes - #643
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| └────────────────────────────────────────────────── | ||
| ┌───── Stage 2 ── tasks=1, partitions=4 | ||
| │ BroadcastExec: input_partitions=1, consumer_tasks=4, output_partitions=4 | ||
| │ CoalescePartitionsExec: fetch=50 | ||
| │ [Stage 1] => NetworkCoalesceExec: output_partitions=12, input_tasks=4 | ||
| └────────────────────────────────────────────────── | ||
| ┌───── Stage 1 ── tasks=4, partitions=12 | ||
| │ LocalLimitExec: fetch=50 | ||
| │ DistributedLeafExec: | ||
| │ t0: DataSourceExec: file_groups={3 groups: [[/target/multi_task_collect_join_repros/build_side/part-1.parquet:<int>..<int>], [/target/multi_task_collect_join_repros/build_side/part-2.parquet:<int>..<int>], [/target/multi_task_collect_join_repros/build_side/part-3.parquet:<int>..<int>]]}, projection=[id], limit=50, file_type=parquet | ||
| │ t1: DataSourceExec: file_groups={3 groups: [[/target/multi_task_collect_join_repros/build_side/part-1.parquet:<int>..<int>], [/target/multi_task_collect_join_repros/build_side/part-2.parquet:<int>..<int>], [/target/multi_task_collect_join_repros/build_side/part-3.parquet:<int>..<int>]]}, projection=[id], limit=50, file_type=parquet | ||
| │ t2: DataSourceExec: file_groups={3 groups: [[/target/multi_task_collect_join_repros/build_side/part-1.parquet:<int>..<int>], [/target/multi_task_collect_join_repros/build_side/part-2.parquet:<int>..<int>], [/target/multi_task_collect_join_repros/build_side/part-3.parquet:<int>..<int>]]}, projection=[id], limit=50, file_type=parquet | ||
| │ t3: DataSourceExec: file_groups={3 groups: [[/target/multi_task_collect_join_repros/build_side/part-1.parquet:<int>..<int>, /target/multi_task_collect_join_repros/build_side/part-2.parquet:<int>..<int>], [/target/multi_task_collect_join_repros/build_side/part-2.parquet:<int>..<int>, /target/multi_task_collect_join_repros/build_side/part-3.parquet:<int>..<int>], [/target/multi_task_collect_join_repros/build_side/part-3.parquet:<int>..<int>]]}, projection=[id], limit=50, file_type=parquet | ||
| └────────────────────────────────────────────────── |
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This intermediate Stage 2 should be the key of the fix
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