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add a FAQ entry about :memory: races #376

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Jan 27, 2017
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add a FAQ entry about :memory: races #376

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9 changes: 9 additions & 0 deletions README.md
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Expand Up @@ -68,6 +68,15 @@ FAQ

Yes for readonly. But, No for writable. See #50, #51, #209.

* Why is it racy if I use a `sql.Open("sqlite", ":memory:")` database?

Each connection to :memory: opens a brand new in-memory sql database, so if
the stdlib's sql engine happens to open another connection and you've only
specified ":memory:", that connection will see a brand new database. A
workaround is to use "file::memory:?mode=memory&cache=shared". Every
connection to this string will point to the same in-memory database. See
#204 for more info.

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