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Added a note about WHERE foo IN (...) queries with links to #82 and #129

RandomEtc 2012-06-29 19:55:07 -07:00
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FAQ.md

@ -122,4 +122,18 @@ If a prepared statement has a `name`, it is only parsed once. After that, `name
### 10. Can we override the built in data converters between javascript and postgres data types?
Yes, [here is a test that shows how it can be done.](https://github.com/brianc/node-postgres/blob/master/test/integration/client/huge-numeric-tests.js#L6) And for some examples of already registered converters, [look at this file.](https://github.com/brianc/node-postgres/blob/master/lib/textParsers.js)
Yes, [here is a test that shows how it can be done.](https://github.com/brianc/node-postgres/blob/master/test/integration/client/huge-numeric-tests.js#L6) And for some examples of already registered converters, [look at this file.](https://github.com/brianc/node-postgres/blob/master/lib/textParsers.js)
### 11. How do I build a `WHERE foo IN (...)` query to find rows matching an array of values?
You need to flatten your array of values and build the numbered placeholder string for yourself.
```javascript
// passing an array as a value __won't work__:
client.query("SELECT * FROM stooges WHERE name IN ($1)", [ ['larry', 'curly', 'moe'] ], ...);
// passing a flat array of values will work:
client.query("SELECT * FROM stooges WHERE name IN ($1, $2, $3)", ['larry', 'curly', 'moe'], ...);
```
See [#129](https://github.com/brianc/node-postgres/issues/129) and [#82](https://github.com/brianc/node-postgres/issues/82) for more details.