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statement due to user request (#31235)
This changes `StatementTimeout` to `QueryCanceled` for PostgreSQL.
In MySQL, errno 1317 (`ER_QUERY_INTERRUPTED`) is only used when the
query is manually cancelled.
But in PostgreSQL, `QUERY_CANCELED` error code (57014) which is used
`StatementTimeout` is also used when the both case. And, we can not tell
which reason happened.
So I decided to introduce new error class `QueryCanceled` closer to the
error code name.
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Since #31129, new error class `StatementTimeout` has been added.
`TransactionTimeout` is caused by the timeout shorter than
`StatementTimeout`, but its name is too generic. I think that it should
be a name that understands the difference with `StatementTimeout`.
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rails/kamipo/ordinal_methods_should_respect_loaded_records"
This reverts commit 0f79ab91150b4cdb6c018530978a3395962c7a02, reversing
changes made to d575f7f2e737739302a0e8210d01c10f5d4e2c35.
This PR philosophically conflicts with #30800 and Matthew thinks we
should hold off merging this until we find concensus. Reverting since
we're about to cut a release for 5.2.
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Flush idle database connections
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Provide arguments to RecordNotFound
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Add :nodoc: to activerecord [ci skip]
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rails/kamipo/ordinal_methods_should_respect_loaded_records
Ordinal methods should respect loaded records
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We should reset partially loaded `@offsets` cache when latest records
has loaded because the cache has been staled and it may not be
consistent with latest records.
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Improve AR connection fork safety
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Use whatever adapter-provided means we have available to ensure forked
children don't send quit/shutdown/goodbye messages to the server on
connections that belonged to their parent.
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[ci skip]
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These extra `spawn` are called via `klass.all` and `klass.all` is called
everywhere in the internal. Avoiding the extra `spawn` makes` klass.all`
30% faster for STI classes.
https://gist.github.com/kamipo/684d03817a8115848cec8e8b079560b7
```
Warming up --------------------------------------
fast relation 4.410k i/100ms
slow relation 3.334k i/100ms
Calculating -------------------------------------
fast relation 47.373k (± 5.2%) i/s - 238.140k in 5.041836s
slow relation 35.757k (±15.9%) i/s - 176.702k in 5.104625s
Comparison:
fast relation: 47373.2 i/s
slow relation: 35756.7 i/s - 1.32x slower
```
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Prevent deadlocks with load interlock and DB lock.
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This fixes an issue where competing threads deadlock each other.
- Thread A holds the load interlock but is blocked on getting the DB lock
- Thread B holds the DB lock but is blocked on getting the load interlock (for example when there is a `Model.transaction` block that needs to autoload)
This solution allows for dependency loading in other threads while a thread is waiting to acquire the DB lock.
Fixes #31019
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Switch to LIFO for the connection pool
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Using a FIFO for the connection pool can lead to issues when there are
upstream components (pgbouncer, haproxy, etc.) that terminate
connections that are idle after a period of time. Switching to a LIFO
reduces the probability that a thread will checkout a connection that is
about to be closed by an idle timeout in an upstream component.
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Enable query cache on all connection pools
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Since the query cache no longer eagerly checks out a connection, we can
enable it on all connection pools at the start of every request, and it
will only take effect for requests that actually use those pools.
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`_update_record` (#29999)
Currently `_create_record` and `_update_record` in `Persistence` are
creating extra `unscoped` and calling `build_arel` in the relation. But
`compile_insert` and `compile_update` can be done without those
expensive operation for `SelectManager` creation. So I moved the
implementation to `Persistence` to avoid creating extra relation and
refactored to avoid calling `build_arel`.
https://gist.github.com/kamipo/8ed73d760112cfa5f6263c9413633419
Before:
```
Warming up --------------------------------------
_update_record 150.000 i/100ms
Calculating -------------------------------------
_update_record 1.548k (±12.3%) i/s - 7.650k in 5.042603s
```
After:
```
Warming up --------------------------------------
_update_record 201.000 i/100ms
Calculating -------------------------------------
_update_record 2.002k (±12.8%) i/s - 9.849k in 5.027681s
```
30% faster for STI classes.
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* Add a #populate method to migrations
* Address rubocop issues
* Rename to #up_only and use #execute in the examples intead of the model
* Update CHANGELOG
[Rich Daley & Rafael Mendonça França]
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Make it clear that `exists?` can be chained onto a relation
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Disallow raw SQL in dangerous AR methods
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with Arel SQL literator which overrides #concat
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Currently the environment is not loaded in some db tasks.
Therefore, if use encrypted secrets values in `database.yml`,
`read_encrypted_secrets` will not be true, so the value can not be
used correctly.
To fix this, added `environment` as dependency of `load_config`.
It also removes explicit `environment` dependencies that are no longer
needed.
Fixes #30717
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The documentation claims that given values go through "normal AR type
casting and serialization", which to me implies
`serialize(cast(value))`, not just serialization. The docs were changed
to use this wording in #22492. The tests I cited in that PR (which is
the same test modified in this commit), is worded in a way that implies
it should be using `cast` as well.
It's possible that I originally meant "normal type casting" to imply
just the call to `serialize`, but given that `update_all(archived:
params['archived'])` seems to be pretty common, I'm inclined to make
this change as long as no tests are broken from it.
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Do not use `Arel.star` when `ignored_columns`
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If there are any ignored columns, we will now list out all columns we
want to be returned from the database.
Includes a regression test.
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Make clear that the files are not to be run for interpreters.
Fixes #23847.
Fixes #30690.
Closes #23878.
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timeout exceeded (#31129)
We are sometimes using The MAX_EXECUTION_TIME hint for MySQL depending
on the situation. It will prevent catastrophic performance down by wrong
performing queries.
The new error class `StatementTimeout` will make to be easier to handle
that case.
https://dev.mysql.com/doc/refman/5.7/en/optimizer-hints.html#optimizer-hints-execution-time
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Make automatically synchronize test schema work inside engine
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