Module: ActiveRecord::ConnectionAdapters::MySQL::DatabaseStatements

Included in:
ActiveRecord::ConnectionAdapters::Mysql2Adapter
Defined in:
lib/active_record/connection_adapters/mysql/database_statements.rb

Instance Method Summary collapse

Instance Method Details

#exec_delete(sql, name, binds) ⇒ Object Also known as: exec_update 



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# File 'lib/active_record/connection_adapters/mysql/database_statements.rb', line 61

def exec_delete(sql, name, binds)
  if without_prepared_statement?(binds)
    execute_and_free(sql, name) { @connection.affected_rows }
  else
    exec_stmt_and_free(sql, name, binds) { |stmt| stmt.affected_rows }
  end
end

#exec_query(sql, name = 'SQL', binds = [], prepare: false) ⇒ Object 



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# File 'lib/active_record/connection_adapters/mysql/database_statements.rb', line 49

def exec_query(sql, name = 'SQL', binds = [], prepare: false)
  if without_prepared_statement?(binds)
    execute_and_free(sql, name) do |result|
      ActiveRecord::Result.new(result.fields, result.to_a) if result
    end
  else
    exec_stmt_and_free(sql, name, binds, cache_stmt: prepare) do |_, result|
      ActiveRecord::Result.new(result.fields, result.to_a) if result
    end
  end
end

#execute(sql, name = nil) ⇒ Object

Executes the SQL statement in the context of this connection.



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# File 'lib/active_record/connection_adapters/mysql/database_statements.rb', line 39

def execute(sql, name = nil)
  if @connection
    # make sure we carry over any changes to ActiveRecord::Base.default_timezone that have been
    # made since we established the connection
    @connection.query_options[:database_timezone] = ActiveRecord::Base.default_timezone
  end

  super
end

#select_all(arel, name = nil, binds = [], preparable: nil) ⇒ Object

Returns an ActiveRecord::Result instance.



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# File 'lib/active_record/connection_adapters/mysql/database_statements.rb', line 6

def select_all(arel, name = nil, binds = [], preparable: nil)
  result = if ExplainRegistry.collect? && prepared_statements
    unprepared_statement { super }
  else
    super
  end
  @connection.next_result while @connection.more_results?
  result
end

#select_one(arel, name = nil, binds = []) ⇒ Object

Returns a record hash with the column names as keys and column values as values.



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# File 'lib/active_record/connection_adapters/mysql/database_statements.rb', line 18

def select_one(arel, name = nil, binds = [])
  arel, binds = binds_from_relation(arel, binds)
  @connection.query_options.merge!(as: :hash)
  select_result(to_sql(arel, binds), name, binds) do |result|
    @connection.next_result while @connection.more_results?
    result.first
  end
ensure
  @connection.query_options.merge!(as: :array)
end

#select_rows(sql, name = nil, binds = []) ⇒ Object

Returns an array of arrays containing the field values. Order is the same as that returned by columns.



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# File 'lib/active_record/connection_adapters/mysql/database_statements.rb', line 31

def select_rows(sql, name = nil, binds = [])
  select_result(sql, name, binds) do |result|
    @connection.next_result while @connection.more_results?
    result.to_a
  end
end