truncate

Get all Foreign Keys for All dependent tables for One Table to nth Level

由 与世无争的帅哥 提交于 2020-01-14 07:12:08
问题 I have one table Called Member with Column Name Member_Id . This Table Referred by more than 23 other tables as Primary Table with Member_Id as Foreign Column. Now these 23 tables also have Primary Keys, and some serve also as Primary table for other tables. So I want to fetch all Foreign Keys for all dependent Table referring to table Member . My Goal is to Truncate Member table which has Foreign keys. I can't use Delete as these tables have more data, so it may take ages for me to delete

Truncate a HTML formatted text with SMARTY

由 五迷三道 提交于 2020-01-13 15:00:11
问题 I've got a variable which is formatted with random HTML code. I call it to {$text} and i truncate it. The value is for example: <div>Lorem <i>ipsum <b>dolor <span>sit </span>amet</b>, con</i> elit.</div> If i truncate the text's first ~30 letters, I'll get this: <div>Lorem <i>ipsum <b>dolor <span>sit The problem is, I can't close the elements. So, I need a script, which check the <*> elements in the code (where * could be anything), and if it dont have a close tag, close 'em. Please help me

C++ precision of numbers and truncation with fstream

由 霸气de小男生 提交于 2020-01-11 09:51:28
问题 I have a file.txt with hundreds of numbers. They have many digits (max 20) after the point and I need to get them all without truncation, otherwise they introduce errors in the following computations. I made these numbers with matlab so it has a monstrous precision but now I must replicate this behaviour in my program. I've done this way: fstream in; in.open(file.txt, ios::in); long double number; in>>number; I also tried this in.precision(20); in>>number; before each ">>" operation but it is

URL getting truncated at 255 characters

由 徘徊边缘 提交于 2020-01-11 05:29:08
问题 I have a JavaScript widget which communicates with my Rails app by creating tags in the DOM. Every once in a while, I see a malformed request in my server logs, where the URL is truncated at 255 characters: http://myapplication.example/mycontroller/1/myaction?hostname=www.mycustomer.example&request[param_a]=3&request[param_b]=1&request[param_c]=0&request[param_d]=0&request[param_e]=3&request[param_f]=1&request[param_g]=4&request[param_h]=0&request[param_i]=5&request From Google and

Using JavaScript to truncate text to a certain size (8 KB)

由 佐手、 提交于 2020-01-11 04:53:06
问题 I'm using the Zemanta API, which accepts up to 8 KB of text per call. I'm extracting the text to send to Zemanta from Web pages using JavaScript, so I'm looking for a function that will truncate my text at exactly 8 KB. Zemanta should do this truncation on its own (i.e., if you send it a larger string), but I need to shuttle this text around a bit before making the API call, so I want to keep the payload as small as possible. Is it safe to assume that 8 KB of text is 8,192 characters, and to

Truncate a string without ending in the middle of a word

由 蓝咒 提交于 2020-01-09 12:16:34
问题 I am looking for a way to truncate a string in Python that will not cut off the string in the middle of a word. For example: Original: "This is really awesome." "Dumb" truncate: "This is real..." "Smart" truncate: "This is really..." I'm looking for a way to accomplish the "smart" truncate from above. 回答1: I actually wrote a solution for this on a recent project of mine. I've compressed the majority of it down to be a little smaller. def smart_truncate(content, length=100, suffix='...'): if

drop,delete与truncate的区别

由 谁说胖子不能爱 提交于 2020-01-09 01:44:08
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> drop 直接删掉表； truncate 删除的是表中的数据，再插入数据时自增长的数据id又重新从1开始； delete 删除表中数据，可以在后面添加where字句。 （1） DELETE语句执行删除操作的过程是每次从表中删除一行，并且同时将该行的删除操作作为事务记录在日志中保存以便进行进行回滚操作。TRUNCATE TABLE 则一次性地从表中删除所有的数据并不把单独的删除操作记录记入日志保存，删除行是不能恢复的。并且在删除的过程中不会激活与表有关的删除触发器。执行速度快。 （2） 表和索引所占空间。当表被TRUNCATE 后，这个表和索引所占用的空间会恢复到初始大小，而DELETE操作不会减少表或索引所占用的空间。drop语句将表所占用的空间全释放掉。 （3） 一般而言，drop > truncate > delete （4） 应用范围。TRUNCATE 只能对TABLE；DELETE可以是table和view （5） TRUNCATE 和DELETE只删除数据，而DROP则删除整个表（结构和数据）。 （6） truncate与不带where的delete ：只删除数据，而不删除表的结构（定义）drop语句将删除表的结构被依赖的约束（constrain),触发器（trigger)索引（index)

truncate delete drop 区别

由 谁都会走 提交于 2020-01-09 01:43:30
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 1. truncate和 delete只删除数据不删除表的结构(定义)； drop语句将删除表的结构被依赖的约束(constrain),触发器(trigger),索引(index); 依赖于该表的存储过程/函数将保留,但是变为invalid状态。 2. delete语句是dml（Data Manipulation Language）,这个操作会放到rollback segment中,事务提交之后才生效;如果有相应的trigger,执行的时候将被触发。 truncate,drop是ddl(Data Definition Language)，操作立即生效,原数据不放到rollback segment中，不能回滚。操作不触发trigger。 3. delete语句不影响表所占用的extent, 高水线(high watermark)保持原位置不动，显然drop语句将表所占用的空间全部释放。 truncate 语句缺省情况下可以使空间释放到minextents个extent,除非使用reuse storage； truncate会将高水线复位(回到最开始)。 4. 速度,一般来说: drop>; truncate >; delete（没有测试过） 5. 安全性： 小心使用drop 和truncate,尤其没有备份的时候

Truncating takes too much time hsqldb

由 若如初见. 提交于 2020-01-06 02:32:31
问题 I use HSQLDB 2.3.2 and I've got the following issues: My database has cached table with 10 000 000 records without any constraints and indexes. Its size is about ~900mb. I turn off autocommit mode and when I try to execute "Truncate table tableName", execution hangs but only dbName.backup is growing. And here's why: TRACE ENGINE:? - copyShadow [size, time] 2246252 9721 TRACE ENGINE:? - setFileModified flag set TRACE ENGINE:? - cache save rows [count,time] totals 24801,9921 operation 24801

Crop string after 2nd full stop

由 人盡茶涼 提交于 2020-01-05 07:52:52
问题 In PHP, I'd like to crop the following sentence: "Test 1. Test 2. Test 3." and transform this into 2 strings: "Test 1. Test 2." and "Test 3." How do I achieve this? Do I use strpos? Many thanks for any pointers. 回答1: Something like that? $str = 'Test 1. Test 2. Test 3.'; $strArray = explode('.', $str); $str1 = $strArray[0] . '. ' . $strArray[1] . '.'; $str2 = $strArray[2] . '.'; 回答2: function isIndex($i){ $i = (isset($i)) ? $i : false; return $i; } $str = explode("2.", "Test 1. Test 2. Test 3
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