4 Procedures for Retrieving Data

To get an answer you have to ask a question, i.e., send either a command or a query to the connection using either pg-exec or some combination of the lower-level non-blocking operations that comprise pg-exec.

• Parameters: Strings containing typed placeholders.
• Synchronous Retrieval: Using pg-exec.
• Asynchronous Retrieval: Using pieces of pg-exec.
• Processing Results: What to do with data and/or errors.