Re: Answer: What are placeholders in DBI, and why would I want to use them?

You can, however, do something along the lines of:

  my $sql = '... WHERE foo IN (' . join(',', ('?') x scalar( @values )
+) . ') ...';
[download]

in order to generate the proper placeholder-based statement that you can then pass your parameters into.

See also DBIx::PreQL.

Update: As per BrowserUK (below), in order to make use of this, you either need to prepare your query each time, cache your prepared query based on number of parameters using prepare_cached or some other method, or know that the number of parameters will be the same each and every time.

--MidLifeXis

Comment on Re: Answer: What are placeholders in DBI, and why would I want to use them? Select or Download Code

Replies are listed 'Best First'.
Re^2: Answer: What are placeholders in DBI, and why would I want to use them? by BrowserUk (Patriarch) on Dec 30, 2015 at 17:39 UTC
You can, however, do something along the lines of: 01 my $sql = '... WHERE foo IN (' . join(',', ('?') x scalar( @values )) . ') ...'; in order to generate the proper placeholder-based statement that you can then pass your parameters into. Only if you will have the same number of parameters for each binding; and know that number a priori when you prepare the statement. With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". I knew I was on the right track :) In the absence of evidence, opinion is indistinguishable from prejudice.	[reply]
Re^3: Answer: What are placeholders in DBI, and why would I want to use them? by MidLifeXis (Monsignor) on Dec 30, 2015 at 17:43 UTC
Yes, absolutely. I made the assumption (probably poor) that this was not for performance, but to use placeholders in the SQL. Update to my response is ~~in order~~ done. --MidLifeXis	[reply]


No such thing as a small change
	PerlMonks