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Asked: 2026-05-16T13:49:33+00:00

I am reviewing code that makes the following call: id<PLResultSet> results = [sqliteDatabase executeQuery:@select

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I am reviewing code that makes the following call:

id<PLResultSet> results = [sqliteDatabase executeQuery:@"select * where id=?",Id];

sqliteDatabase is an instance of PlausibleDatabase (from GoogleCode, I gather). The code works, but I don’t understand it. Specifically, how does this section work?

@"select * where id=?",Id

Is the query being made with ? being replaced by Id? Or is the exeuteQuery function somehow combining the strings? How does this syntax make sense.

(Yes, I am new to Obj-C)

Thanks,

KF

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1 Answer

  1. Editorial Team

    It’s specific to the method executeQuery, in which ? is used as a placeholder, and the appropriate positional argument is used as filler for that placeholder (with quoting, etc. added as necessary).

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