alamb commented on issue #5789:
URL:
https://github.com/apache/arrow-datafusion/issues/5789#issuecomment-1924686232
For the record this still happens:
```
(venv-310) andrewlamb@Andrews-MacBook-Pro:~/Downloads$ datafusion-cli
DataFusion CLI v35.0.0
❯ CREATE EXTERNAL TABLE t1 (a INT, b INT) STORED AS CSV LOCATION 'data.csv';
0 rows in set. Query took 0.030 seconds.
❯ CREATE EXTERNAL TABLE t2 (a INT, b INT) STORED AS CSV LOCATION 'data.csv';
0 rows in set. Query took 0.001 seconds.
❯ SELECT a, b FROM t1 WHERE EXISTS (SELECT count(*) FROM t2);
This feature is not implemented: Physical plan does not support logical
expression Exists(Exists { subquery: <subquery>, negated: false })
❯
```
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