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I think there are two problems - but the most important is that the syntax
isn't valid SQL. ?-style placeholders are used to pass variables into WHERE clauses, not to pass literals into the SELECT statement. I suspect that this is why your query only works if you specify the 4.x protocol level, as that does NOT support placeholders. I'll still take a look at the issue you opened on GitHub, but I suspect that this is really a client side SQL issue more than anything else. Michael In reply to Re: fetchall_arrayref hangs with placeholders query with no results
by mpeppler
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