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module ActiveRecord
module ConnectionAdapters
module MySQL
module DatabaseStatements
# Returns an ActiveRecord::Result instance.
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
# Returns an array of arrays containing the field values.
# Order is the same as that returned by +columns+.
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
# Executes the SQL statement in the context of this connection.
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
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
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
alias :exec_update :exec_delete
protected
def last_inserted_id(result)
@connection.last_id
end
private
def select_result(sql, name = nil, binds = [])
if without_prepared_statement?(binds)
execute_and_free(sql, name) { |result| yield result }
else
exec_stmt_and_free(sql, name, binds, cache_stmt: true) { |_, result| yield result }
end
end
def exec_stmt_and_free(sql, name, binds, cache_stmt: false)
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
type_casted_binds = binds.map { |attr| type_cast(attr.value_for_database) }
log(sql, name, binds, type_casted_binds) do
if cache_stmt
cache = @statements[sql] ||= {
stmt: @connection.prepare(sql)
}
stmt = cache[:stmt]
else
stmt = @connection.prepare(sql)
end
begin
result = stmt.execute(*type_casted_binds)
rescue Mysql2::Error => e
if cache_stmt
@statements.delete(sql)
else
stmt.close
end
raise e
end
ret = yield stmt, result
result.free if result
stmt.close unless cache_stmt
ret
end
end
end
end
end
end
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