Thinking some more about the occasional instances of "database schema has changed" that I experience, I took a look through the amalgamation to see where this error might be being detected. Reading the code and the comments I'm reminded of something I keep forgetting: that SQLite has no server. And the way my app operates, it's quite possible that it can ask apache to run three or four threads more or less simultaneously, each of which may want to modify the same set of SQLite databases. Each such thread is a PHP script using the PDO interface; this is under OS X 10.7.1 using whichever apache version/PHP/SQLite that comes with it (it's all pretty recent, IIRC).
My question now is, if two or more PHP scripts are competing for access to the same database, is "database schema has changed" a possible outcome? -- Cheers -- Tim
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