[BUG] 计划生成多个sql的node节点，python执行的时候只是获取了最后一个sql节点的数据

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Current Behavior

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### Expected Behavior

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### Steps To Reproduce

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### Environment

```markdown
Spring AI Alibaba DataAgent version(s):
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### Debug logs

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### Anything else?

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