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When writing SQL you always want to use placeholders rather than trying to escape text yourself and risk an SQL injection attack.

Postgres provides great functionality for this such as:

SELECT * FROM table WHERE username = $1 Today I was trying to send arbitrary text to a channel via the very powerful NOTIFY command. However every time I tried to use placeholders I was getting errors (from python’s asyncpg driver, which is pulling it directly from postgres error code 42601 ).

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