From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | hus787(at)gmail(dot)com |
Cc: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: BUG #14104: PREPARE document has a missing parameter in one of the examples |
Date: | 2016-04-21 21:50:15 |
Message-ID: | 23196.1461275415@sss.pgh.pa.us |
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Thread: | |
Lists: | pgsql-bugs |
hus787(at)gmail(dot)com writes:
> The second example here:
> http://www.postgresql.org/docs/9.4/static/sql-prepare.html
> ```
> PREPARE usrrptplan (int) AS
> SELECT * FROM users u, logs l WHERE u.usrid=$1 AND u.usrid=l.usrid
> AND l.date = $2;
> EXECUTE usrrptplan(1, current_date);
> ```
> `usrrptplan` should take in too arguments.
No, it's intentionally that way; the point of the example is to show
that you can let the parser infer the types of arguments if you like.
Note the subsequent para:
Note that the data type of the second parameter is not specified,
so it is inferred from the context in which $2 is used.
regards, tom lane
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