Yes, the DBI documentation says that only one command should be run at a time. That is more of a recommendation of how the DBI is intended to be used. It is not necessarily descriptive of what will be accepted. Whether multiple commands are accepted is up to the individual drivers and databases:

In ODBC terms, the DBI is in "pass-thru" mode, although individual drivers might not be.

- The DBI documentation

I have seen DBD::Mysql and DBD::Sybase accept multiple commands at a time. I don't know about other drivers.

But, as you say, unless there's a bug in the quoting code, placeholders are quite safe. They won't necessarily prevent you from running multiple commands at once, but they will prevent user-supplied data from being interpreted as SQL commands.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.