diff options
Diffstat (limited to 'activerecord/lib')
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb | 23 | ||||
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/mysql_adapter.rb | 12 |
2 files changed, 35 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb index abb695264e..0c87e052c4 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb @@ -181,6 +181,29 @@ module ActiveRecord # done if the transaction block raises an exception or returns false. def rollback_db_transaction() end + # Appends +LIMIT+ and +OFFSET+ options to an SQL statement, or some SQL + # fragment that has the same semantics as LIMIT and OFFSET. + # + # +options+ must be a Hash which contains a +:limit+ option + # and an +:offset+ option. + # + # This method *modifies* the +sql+ parameter. + # + # ===== Examples + # add_limit_offset!('SELECT * FROM suppliers', {:limit => 10, :offset => 50}) + # generates + # SELECT * FROM suppliers LIMIT 10 OFFSET 50 + + def add_limit_offset!(sql, options) + if limit = options[:limit] + sql << " LIMIT #{sanitize_limit(limit)}" + end + if offset = options[:offset] + sql << " OFFSET #{offset.to_i}" + end + sql + end + def default_sequence_name(table, column) nil end diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb index 1f1df7e8c3..6946701ee5 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb @@ -375,6 +375,18 @@ module ActiveRecord execute("RELEASE SAVEPOINT #{current_savepoint_name}") end + def add_limit_offset!(sql, options) #:nodoc: + limit, offset = options[:limit], options[:offset] + if limit && offset + sql << " LIMIT #{offset.to_i}, #{sanitize_limit(limit)}" + elsif limit + sql << " LIMIT #{sanitize_limit(limit)}" + elsif offset + sql << " OFFSET #{offset.to_i}" + end + sql + end + # SCHEMA STATEMENTS ======================================== def structure_dump #:nodoc: |