Can `knitr` suppress execution or output in an sql chunk?
<p>The document below runs the sql and shows the results.  I don't want any output to show up, either by not running the chunk, or by hiding the output.  </p>

<p>Is there a way to do this?</p>

<pre><code>---
output: html_document
---

## Hide SQL Output

First, set up a temporary database:

```{r}
library(RSQLite)
conn &lt;- dbConnect(SQLite(), tempfile())
df &lt;- data.frame(value = runif(1))
dbWriteTable(conn, "TestTable", df)
```

Now show a query, but try not to run it, and try
to hide the output.  Neither works:  it runs, and 
displays the table.

```{sql connection = conn,results="hide",eval=FALSE}
SELECT * FROM TestTable;
```
</code></pre>

<p>I get this output:
<a href="https://i.stack.imgur.com/6zxuc.png" rel="noreferrer"><img src="https://i.stack.imgur.com/6zxuc.png" alt="enter image description here"></a></p>