conn: Implement driver.Validator, SessionResetter for cancelation #1079
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Commit 8446d16 released in 1.10.4 changed how some cancelled query errors were returned. This has caused a lib/pq application I work on to start returning "driver: bad connection". This is because we were cancelling a query, after looking at some of the rows. This causes a "bad" connection to be returned to the connection pool. To prevent this, implement the driver.Validator and driver.SessionResetter interfaces. The database/sql/driver package recommends implementing them: "All Conn implementations should implement the following interfaces: Pinger, SessionResetter, and Validator" Add two tests for this behaviour. One of these tests passed with 1.10.3 but fails with newer versions. The other never passed, but does after this change.
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rafiss
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Aug 29, 2022
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thanks! i think this will fix the concern raised in this comment #1000 (comment)
just had a small comment
conn.go
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| func (cn *conn) IsValid() bool { | ||
| // panic("TODO IsValid") |
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Embarrassing! Thanks for noticing. Removed.
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Sorry for the massive delay. I must have lost the github notification on the PR. I have merged the latest master, and have fixed the code review comment above. Thanks! |
rafiss
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Apr 14, 2023
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thanks for the contribution!
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@evanj thanks for the fix, we ran into the same issue recently |
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Commit 8446d16 released in 1.10.4 changed how some cancelled query
errors were returned. This has caused a lib/pq application I work on
to start returning "driver: bad connection". This is because we were
cancelling a query, after looking at some of the rows. This causes a
"bad" connection to be returned to the connection pool.
To prevent this, implement the driver.Validator and
driver.SessionResetter interfaces. The database/sql/driver package
recommends implementing them:
"All Conn implementations should implement the following interfaces:
Pinger, SessionResetter, and Validator"
Add two tests for this behaviour. One of these tests passed with
1.10.3 but fails with newer versions. The other never passed, but
does after this change.