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From: Erik Wienhold <[email protected]>
To: David E. Wheeler <[email protected]>
To: [email protected]
Subject: Re: to_regtype() Raises Error
Date: Mon, 18 Sep 2023 00:41:01 +0200 (CEST)
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

On 18/09/2023 00:13 CEST David E. Wheeler <[email protected]> wrote:

> The docs for `to_regtype()` say, “this function will return NULL rather than
> throwing an error if the name is not found.” And it’s true most of the time:
>
> david=# select to_regtype('foo'), to_regtype('clam');
>  to_regtype | to_regtype
> ------------+------------
>  [null]     | [null]
>
> But not others:
>
> david=# select to_regtype('inteval second');
> ERROR:  syntax error at or near "second"
> LINE 1: select to_regtype('inteval second');
>                 ^
> CONTEXT:  invalid type name "inteval second”

Probably a typo and you meant 'interval second' which works.

> I presume this has something to do with not catching errors from the parser?
>
> david=# select to_regtype('clam bake');
> ERROR:  syntax error at or near "bake"
> LINE 1: select to_regtype('clam bake');
>              ^
> CONTEXT:  invalid type name "clam bake"

Double-quoting the type name to treat it as an identifier works:

	test=# select to_regtype('"clam bake"');
	 to_regtype
	------------
	 <NULL>
	(1 row)

So it's basically a matter of keywords vs. identifiers.

--
Erik

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