When I originally reviewed the #20317, I believe these changes were
present, but it appears that it was later updated so that they were
removed. Since Travis hadn't re-run the build, this slipped through.
And we are passing them as separate types in the query, which means 0
precision is still not supported by older versions of MySQL. I also
missed a handful of other cases where they need to be conditionally
applied.
Specifically, versions of MySQL prior to 5.6 do not support this, which
is what's used on Travis by default. The method `mysql_56?` appeared to
only ever be used to conditionally apply subsecond precision, so I've
generalized it and used it more liberally.
This should fix the test failures caused by #20317
Timestamp column can have less precision than ruby timestamp
In result in how big a fraction of a second can be stored in the
database.
m = Model.create!
m.created_at.usec == m.reload.created_at.usec
# => false
# due to different seconds precision in Time.now and database column
If the precision is low enough, (mysql default is 0, so it is always low
enough by default) the value changes when model is reloaded from the
database. This patch fixes that issue ensuring that any timestamp
assigned as an attribute is converted to column precision under the
attribute.
This argument was needen when `sanitize_sql_for_conditions` internally
called `sanitize_sql_hash_for_conditions`.
But `sanitize_sql_hash_for_conditions` was deprecated
(eb921000a1)
and deleted
(3a59dd2123)
(4bd089f1d9).
Arguments of `#sum` does not match with other shortcuts methods
(count, average, minimum, and maximum).
This commit fix these two points:
* call `super` with only block arguments
First argument of `super` method, `Enumerable#sum`, is `identity`
and first argument of `AR::Calculations#sum` is `column_name`.
`Enumerable#sum` does not expect `column_name` to be passed.
* Change first argument of `sum` from array arguemnt to single
argument to match other shortcuts methods. When `sum` accept
array arguemnt, user can pass multi arguments and an exception is
raised from `calculate`.
These new methods are used from the Active Record model layer to
determine which relations are viable to back a model. These new methods
allow us to change `conn.tables` in the future to only return tables and
no views. Same for `conn.table_exists?`.
The goal is to provide the following introspection methods on the
connection:
* `tables`
* `table_exists?`
* `views`
* `view_exists?`
* `data_sources` (views + tables)
* `data_source_exists?` (views + tables)
We should not run MysqlAdapter tests when running with `sqlite3_mem`.
This also moves the test-case outside the MysqlAdapter namespace. This
will prevent the following error when running everything:
```
1) Error:
TestAdapterWithInvalidConnection#test_inspect_on_Model_class_does_not_raise:
TypeError: superclass mismatch for class MysqlAdapter
```
