Postgres 8.4 and greater databases contain common tables in `public` schema and company specific tables in `company` schema.  

`company` schema names always start with `'company'` and end with the company number.  

So there may be schemas like:

```
public
company1
company2
company3
...
companynn

```

An application always works with a single company.  

The `search_path` is specified accordingly in odbc or npgsql connection string, like:

```
search_path='company3,public'

```

How would you check if a given table exists in a specified `companyn` schema?

eg:

```
select isSpecific('company3','tablenotincompany3schema')

```

should return `false`, and

```
select isSpecific('company3','tableincompany3schema')

```

should return `true`.

In any case, the function should check only `companyn` schema passed, not other schemas.

If a given table exists in both `public` and the passed schema, the function should return `true`.  

It should work for Postgres 8.4 or later.