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Generating a random & unique 8 character string using MySQL
...ting an 8-character long pseudo-random string in pure (My)SQL:
SELECT LEFT(UUID(), 8);
You can try the following (pseudo-code):
DO
SELECT LEFT(UUID(), 8) INTO @plate;
INSERT INTO plates (@plate);
WHILE there_is_a_unique_constraint_violation
-- @plate is your newly assigned plate number
S...
Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...
开始安装
安装完成后按提示重新引导
重启引导报错 网上搜索不到任何有用的资料，多方尝试，其中包
网上搜索不到任何有用的资料，多方尝试，其中包改为LVM分区 还是报错
重装3次 换系统安装还是不行。
折腾...
How to suppress GCC warnings from library headers?
...gma GCC diagnostic ignored "-Wunused-but-set-variable"
#include <boost/uuid/uuid.hpp>
#include <boost/uuid/uuid_generators.hpp>
#include <boost/uuid/uuid_io.hpp>
#include <boost/lexical_cast.hpp>
// turn the warnings back on
#pragma GCC diagnostic pop
...
Convert varchar to uniqueidentifier in SQL Server
...
DECLARE @uuid VARCHAR(50)
SET @uuid = 'a89b1acd95016ae6b9c8aabb07da2010'
SELECT CAST(
SUBSTRING(@uuid, 1, 8) + '-' + SUBSTRING(@uuid, 9, 4) + '-' + SUBSTRING(@uuid, 13, 4) + '-' +
SUBSTRING(@uuid, 17, 4) + '-' + SUBST...
Android get free size of internal/external memory
....execute {
for (storageVolume in storageVolumes) {
val uuid: UUID = storageVolume.uuid?.let { UUID.fromString(it) } ?: StorageManager.UUID_DEFAULT
val allocatableBytes = storageManager.getAllocatableBytes(uuid)
Log.d("AppLog", "allocatableBytes:${android.t...
低频率蓝牙发送报文报错，报错内容和程序如下。麻烦老师们帮忙解决一下 - A...
低频率蓝牙发送报文报错，报错内容和程序如下。麻烦老师们帮忙解决一下
值是一个字节列表，不是文本。
utf16 参数建议 “假”。
how to use ng-option to set default value of select element
... your array of objects are complex like:
$scope.friends = [{ name: John , uuid: 1234}, {name: Joe, uuid, 5678}];
And your current model was set to something like:
$scope.user.friend = {name:John, uuid: 1234};
It helped to use the track by function on uuid (or any unique field), as long as the ...
How to speed up insertion performance in PostgreSQL
...
If you happend to insert colums with UUIDs (which is not exactly your case) and to add to @Dennis answer (I can't comment yet), be advise than using gen_random_uuid() (requires PG 9.4 and pgcrypto module) is (a lot) faster than uuid_generate_v4()
=# explain anal...
Rails 4: List of available datatypes
...
For Postgres there is additionally a uuid type which can be used as normal field like t.uuid :name... or as primary key like create_table :users, id: :uuid do... or e.g. t.primary_key :id, :uuid, :default => 'uuid_generate_v1()'
– TNT
...
Mocking static methods with Mockito
...ception occurred while fetching localhost address", e);
return UUID.randomUUID().toString();
}
}
}
My test class:
@RunWith(PowerMockRunner.class)
@PrepareForTest(SmokeRouteBuilder.class)
public class SmokeRouteBuilderTest {
@Test
public void testSmokeMessageId_exce...