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