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* Add an example of using a connection pool. * Add documentation about the connection pools. Expand the documentation about multi-threading issues.
20 lines
988 B
Markdown
20 lines
988 B
Markdown
# Thread Safety
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sqlpp11 aspires to have no influence on thread safety itself, but offers
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no particular guarantees (PRs welcome). This means that in the general case
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your program may have problems if it does one of the following
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* Creates a connection in one thread and then uses it in another thread..
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* Uses the same connection simultaneously in multiple threads.
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The exact level of thread-safety depends on the underlying client library, for
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example with MySQL, PostgreSQL and SQLite3 it is generally safe to create a
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connection in one thread and then use it in another thread, but attempting to
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use the same connection simultaneously in multiple threads causes crashes,
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lock-ups and SQL errors.
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The recommendation therefore is to **not share** connections between threads
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and to read about thread safety of the underlying database for more
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information. You may also look into [Connection Pools](Connection-Pools.md)
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as a way to make SQL queries simultaneously in multiple threads.
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