| Commit message (Collapse) | Author | Age | Files | Lines |
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We should only type cast when we need to use.
Related to 4b005fb371c2e7af80df7da63be94509b1db038c
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in the new 'variables:' hash in each database config section in database.yml.
The key-value pairs of this hash will be sent in a 'SET key = value, ...'
query on new database connections.
The configure_connection methods from mysql and mysql2 into are
consolidated into the abstract_mysql base class.
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In non-strict mode it is '', but if someone is in strict mode then we
should honour the strict semantics.
Also, this removes the need for a completely horrible hack in dirty.rb.
Closes #7780
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Conflicts:
activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
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Prepared statements (prepare/execute/close) were being used unnecessarily
when no bind variables were present, and disabling prepared statement using
prepared_statements:false was principally broken. While bind variables were
correctly substituted with prepared_statements:false, the prepared statement
interface was still used, costing an extra two round trips per query.
In addition to making this behavioral change, I also cleaned up the internals
of exec_stmt and exec_without_stmt so that they behave the same (calling log
and constructing the ActiveRecord::Result in the same way).
Moving the check for binds.empty? to exec_query also will mean that several
code paths explicitly calling exec_without_stmt could be cleaned up to once
again call exec_query instead. I have also left the check for binds.empty? in
exec_stmt, since it is not a private method and could be called directly with
an empty binds array. For the sake of clarity in this patch, I have not made
those changes.
= The previous behavior =
When issuing a Foo.find(1) with prepared_statements:true, the bind variable
is present in the prepared query, and execute shows a value passed:
Connect root@localhost on rails_test
Query SET SQL_AUTO_IS_NULL=0
Statistics
Query SHOW FULL FIELDS FROM `foos`
Query SHOW TABLES LIKE 'foos'
Query SHOW CREATE TABLE `foos`
Prepare SELECT `foos`.* FROM `foos` WHERE `foos`.`id` = ? LIMIT 1
Execute SELECT `foos`.* FROM `foos` WHERE `foos`.`id` = 1 LIMIT 1
Close stmt
Quit
When issuing a Foo.find(1) with prepared_statements:false, the bind variable
has already been removed and substituted with the value, but the prepared
statement interface is used anyway:
Connect root@localhost on rails_test
Query SET SQL_AUTO_IS_NULL=0
Statistics
Query SHOW FULL FIELDS FROM `foos`
Query SHOW TABLES LIKE 'foos'
Query SHOW CREATE TABLE `foos`
Prepare SELECT `foos`.* FROM `foos` WHERE `foos`.`id` = 1 LIMIT 1
Execute SELECT `foos`.* FROM `foos` WHERE `foos`.`id` = 1 LIMIT 1
Close stmt
Quit
= With this patch applied =
When issuing a Foo.find(1) with prepared_statements:true, the bind variable
is present in the prepared query, and execute shows a value passed:
Connect root@localhost on rails_test
Query SET SQL_AUTO_IS_NULL=0
Statistics
Query SHOW FULL FIELDS FROM `foos`
Query SHOW TABLES LIKE 'foos'
Query SHOW CREATE TABLE `foos`
Prepare SELECT `foos`.* FROM `foos` WHERE `foos`.`id` = ? LIMIT 1
Execute SELECT `foos`.* FROM `foos` WHERE `foos`.`id` = 1 LIMIT 1
Close stmt
Quit
When issuing a Foo.find(1) with prepared_statements:false, the bind variable
has been removed and substituted with the value, and the query interface is
used instead of the prepared statement interface:
Connect root@localhost on rails_test
Query SET SQL_AUTO_IS_NULL=0
Statistics
Query SHOW FULL FIELDS FROM `foos`
Query SHOW TABLES LIKE 'foos'
Query SHOW CREATE TABLE `foos`
Query SELECT `foos`.* FROM `foos` WHERE `foos`.`id` = 1 LIMIT 1
Quit
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This is the 'top level' connection, inherited by any models that include
ActiveRecord::Model or inherit from ActiveRecord::Base.
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case sensitive collation.
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Database adapters use a statement pool for limiting the number of open
prepared statments on the database. The limit defaults to 1000, but can
be adjusted in your database config by changing 'statement_limit'.
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supported for mysql2 as well now.
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MysqlAdapter and Mysql2Adapter.
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for generating SQL. This improves the code architecture generally, and solves some problems with marshalling. Adapter authors please take note: you now need to define an Adapter.visitor_for method, but it degrades gracefully with a deprecation warning for now.
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Conflicts:
actionmailer/lib/action_mailer/base.rb
activesupport/lib/active_support/core_ext/kernel/requires.rb
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Conflicts:
railties/guides/source/contributing_to_ruby_on_rails.textile
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