Query with pushdown SQL parsing is not accurate

**Describe the bug**
A clear and concise description of what the bug is.

I tried using the query pushdown feature and found that no data was queried. Upon checking the logs, I discovered that the
parsed SQL was not what I wanted.

**To Reproduce**
Steps to reproduce the behavior:
1. Enable query pushdown and use it with a Superset connection.

2.Write the following SQL statement:

3.Click the query button, then check the Cube's logs.
4.The parsed statement from Cube is as follows, which is not what I intended. The parameters in the WHERE clause are incorrect, and I believe this is a bug.

**Expected behavior**
A clear and concise description of what you expected to happen.
I believe the value of "sku_code" should be "666666" instead.

**Version:**
[e.g. 0.35.64]