thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-27 18:12:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

add doc

Browse Source 
fix test

fix

name style fix
This commit is contained in:
feng lv 2020-07-14 14:29:01 +08:00
parent f0b423e928
commit 767bc7a905
4 changed files with 46 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
docs/en/sql-reference/functions/date-time-functions.md
View File

@ -503,3 +503,34 @@ Supported modifiers for Format:
| %% | a % sign | % | | %% | a % sign | % |
[Original article](https://clickhouse.tech/docs/en/query_language/functions/date_time_functions/) <!--hide--> [Original article](https://clickhouse.tech/docs/en/query_language/functions/date_time_functions/) <!--hide-->
## FROM_UNIXTIME
When there is only single argument of integer type, it act in the same way as `toDateTime` and return [DateTime](../../sql-reference/data-types/datetime.md).
type.
For example:
```sql
SELECT FROM_UNIXTIME(423543535)
```
```text
┌─FROM_UNIXTIME(423543535)─┐
│ 1983-06-04 10:58:55 │
└──────────────────────────┘
```
When there are two arguments, first is integer or DateTime, second is constant format string, it act in the same way as `formatDateTime` and return `String` type.
For example:
```sql
SELECT FROM_UNIXTIME(1234334543, '%Y-%m-%d %R:%S') AS DateTime
```
```text
┌─DateTime────────────┐
│ 2009-02-11 14:42:23 │
└─────────────────────┘
```

6
src/Functions/formatDateTime.cpp
View File

@ -415,7 +415,7 @@ public:
size_t result_size = pattern_to_fill.size(); size_t result_size = pattern_to_fill.size();
const DateLUTImpl * time_zone_tmp = nullptr; const DateLUTImpl * time_zone_tmp = nullptr;
if (castType(block.getByPosition(arguments[0]).type.get(), [&](const auto & type) { return true; })) if (castType(block.getByPosition(arguments[0]).type.get(), [&]([[maybe_unused]] const auto & type) { return true; }))
{ {
time_zone_tmp = &extractTimeZoneFromFunctionArguments(block, arguments, 2, 0); time_zone_tmp = &extractTimeZoneFromFunctionArguments(block, arguments, 2, 0);
} }
@ -706,13 +706,13 @@ struct NameFormatDateTime
static constexpr auto name = "formatDateTime"; static constexpr auto name = "formatDateTime";
}; };
struct NameFROM_UNIXTIME struct NameFromUnixTime
{ {
static constexpr auto name = "FROM_UNIXTIME"; static constexpr auto name = "FROM_UNIXTIME";
}; };
using FunctionFormatDateTime = FunctionFormatDateTimeImpl<NameFormatDateTime, false>; using FunctionFormatDateTime = FunctionFormatDateTimeImpl<NameFormatDateTime, false>;
using FunctionFROM_UNIXTIME = FunctionFormatDateTimeImpl<NameFROM_UNIXTIME, true>; using FunctionFROM_UNIXTIME = FunctionFormatDateTimeImpl<NameFromUnixTime, true>;
void registerFunctionFormatDateTime(FunctionFactory & factory) void registerFunctionFormatDateTime(FunctionFactory & factory)
{ {

10
tests/queries/0_stateless/01411_from_unixtime.reference
View File

@ -1,10 +1,10 @@
1970-01-01 08:02:03 1970-01-01 00:02:03
1970-01-01 11:25:45 1973-11-29 21:33:09
1970-03-17 01:44:37 2038-07-12 01:15:36
19
19 19
11
1970-01-15 1970-01-15
1970-01-15 14:52:36 1970-01-15 06:52:36
20 20
02 02
01/02/18 01/02/18

14
tests/queries/0_stateless/01411_from_unixtime.sql
View File

@ -1,10 +1,10 @@
SELECT FROM_UNIXTIME(123); SELECT formatDateTime(FROM_UNIXTIME(123), '%Y-%m-%d %R:%S', 'UTC');
SELECT FROM_UNIXTIME(12345); SELECT formatDateTime(FROM_UNIXTIME(123456789), '%Y-%m-%d %R:%S', 'UTC');
SELECT FROM_UNIXTIME(6457477); SELECT formatDateTime(FROM_UNIXTIME(6457477432), '%Y-%m-%d %R:%S', 'UTC');
SELECT FROM_UNIXTIME(5345345, '%C'); SELECT FROM_UNIXTIME(5345345, '%C', 'UTC');
SELECT FROM_UNIXTIME(645123, '%H'); SELECT FROM_UNIXTIME(645123, '%H', 'UTC');
SELECT FROM_UNIXTIME(1232456, '%Y-%m-%d'); SELECT FROM_UNIXTIME(1232456, '%Y-%m-%d', 'UTC');
SELECT FROM_UNIXTIME(1234356, '%Y-%m-%d %R:%S'); SELECT FROM_UNIXTIME(1234356, '%Y-%m-%d %R:%S', 'UTC');
SELECT FROM_UNIXTIME(toDateTime('2018-01-02 22:33:44'), '%C'); SELECT FROM_UNIXTIME(toDateTime('2018-01-02 22:33:44'), '%C');
SELECT FROM_UNIXTIME(toDateTime('2018-01-02 22:33:44'), '%d'); SELECT FROM_UNIXTIME(toDateTime('2018-01-02 22:33:44'), '%d');
SELECT FROM_UNIXTIME(toDateTime('2018-01-02 22:33:44'), '%D'); SELECT FROM_UNIXTIME(toDateTime('2018-01-02 22:33:44'), '%D');