pingcap / pingcap/tidb

Incorrect result for expression with nested ANY and ALL subqueries

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#64,377 1 comment 0 reactions 0 assignees View on GitHub
contribution severity/moderate sig/planner type/bug
Dominant language
Go
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Description

## Bug Report

Please answer these questions before submitting your issue. Thanks!

Is this the same bug as the #64374?
### 1. Minimal reproduce step (Required)

CREATE TABLE t102 (c1 BIT (42));
INSERT t102 () VALUES (b'10');
SELECT * FROM t102 WHERE ((((EXISTS(SELECT 1)) > ANY (SELECT 1)) <= ALL (SELECT 1)));
-- empty set
SELECT SUM(count) FROM (SELECT (((((EXISTS(SELECT 1)) > ANY (SELECT 1)) <= ALL (SELECT 1)))) IS TRUE AS count FROM t102) AS ta_norec;
-- 1
### 2. What did you expect to see? (Required)
The first query should return one row.
The second query should return `1`.
### 3. What did you see instead (Required)
The first query should return EMPTY SET.
The second query should return `1`.
### 4. What is your TiDB version? (Required)

Release Version: v8.5.0-20251010-ec6b882
Edition: Community
Git Commit Hash: https://github.com/pingcap/tidb/commit/ec6b882d188f77c199907ba26843a872b8c5fd6d
Git Branch: heads/refs/tags/v8.5.0-20251010-ec6b882
UTC Build Time: 2025-10-10 10:21:51
GoVersion: go1.23.3
Race Enabled: false
Check Table Before Drop: false
Store: unistore

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