| 1 |
|
-module(mongoose_rdbms_timestamp). |
| 2 |
|
-export([prepare/0, |
| 3 |
|
select/0, |
| 4 |
|
select/2]). |
| 5 |
|
-ignore_xref([select/2]). |
| 6 |
|
|
| 7 |
|
-spec prepare() -> ok. |
| 8 |
|
prepare() -> |
| 9 |
442 |
mongoose_rdbms:prepare(mim_timestamp, users, [], select_query()), |
| 10 |
442 |
ok. |
| 11 |
|
|
| 12 |
|
select_query() -> |
| 13 |
442 |
case {mongoose_rdbms:db_engine(global), mongoose_rdbms:db_type()} of |
| 14 |
|
{mysql, _} -> |
| 15 |
:-( |
<<"SELECT UNIX_TIMESTAMP()">>; |
| 16 |
|
{pgsql, _} -> |
| 17 |
442 |
<<"SELECT CAST(extract(epoch from now()) AS integer)">>; |
| 18 |
|
{odbc, mssql} -> |
| 19 |
:-( |
<<"SELECT DATEDIFF_BIG(second, '1970-01-01 00:00:00', GETUTCDATE())">>; |
| 20 |
|
Other -> |
| 21 |
:-( |
error({prepare_timestamp_query_failed, Other}) |
| 22 |
|
end. |
| 23 |
|
|
| 24 |
|
-spec select(mongooseim:host_type_or_global(), mongoose_wpool:tag()) -> integer(). |
| 25 |
|
select() -> |
| 26 |
442 |
select(global, default). |
| 27 |
|
|
| 28 |
|
select(HostType, PoolTag) -> |
| 29 |
443 |
Res = mongoose_rdbms:execute_successfully(HostType, PoolTag, mim_timestamp, []), |
| 30 |
443 |
mongoose_rdbms:selected_to_integer(Res). %% ensure it is an integer |