RockteMQ-AI commented on issue #10862:
URL: https://github.com/apache/rocketmq/issues/10862#issuecomment-5225832367
**Issue Evaluation**
Category: `bug` | Status: **Confirmed**
The reported issue has been verified against the current codebase (commit
`fd0c959`).
**Root Cause:** `ConstantExpression.createFloat()` (line 61) uses
`Double.MIN_VALUE` as the lower bound. In Java, `Double.MIN_VALUE` is
`4.9E-324` — the smallest positive non-zero value — not the most negative
finite value. Therefore `0.0` fails the check `value < Double.MIN_VALUE` and is
rejected.
**Impact:** SQL selector expressions like `a = 0.0` fail at runtime,
preventing legitimate zero-value filtering.
**Severity:** high — breaks a fundamental use case (zero-value comparison in
message selectors)
**Suggested Fix:** Change the lower bound to `-Double.MAX_VALUE`:
```java
if (value < -Double.MAX_VALUE) {
throw new RuntimeException(text + " is less than " +
(-Double.MAX_VALUE));
}
```
An automated fix proposal will be generated. Reply `/approve` to proceed
with PR generation.
---
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