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Migrate from Oracle to MySQL

由 别来无恙 提交于 2019-11-26 14:39:20
We ran into serious performance problems with our Oracle database and we would like to try to migrate it to a MySQL-based database (either MySQL directly or, more preferably, Infobright). The thing is, we need to let the old and the new system overlap for at least some weeks if not months, before we actually know, if all the features of the new database match our needs. So, here is our situation: The Oracle database consists of multiple tables with each millions of rows. During the day, there are literally thousands of statements, which we cannot stop for migration. Every morning, new data is

What is the JavaScript equivalent of var_dump or print_r in PHP? [duplicate]

由 大兔子大兔子 提交于 2019-11-26 11:45:50
问题 This question already has answers here : Is there an equivalent for var_dump (PHP) in Javascript? (17 answers) Closed last year . I would like to see the structure of object in JavaScript (for debugging). Is there anything similar to var_dump in PHP? 回答1: Most modern browsers have a console in their developer tools, useful for this sort of debugging. console.log(myvar); Then you will get a nicely mapped out interface of the object/whatever in the console. Check out the console documentation

Dumping a java object's properties

由 别来无恙 提交于 2019-11-26 07:55:56
问题 Is there a library that will recursively dump/print an objects properties? I\'m looking for something similar to the console.dir() function in Firebug. I\'m aware of the commons-lang ReflectionToStringBuilder but it does not recurse into an object. I.e., if I run the following: public class ToString { public static void main(String [] args) { System.out.println(ReflectionToStringBuilder.toString(new Outer(), ToStringStyle.MULTI_LINE_STYLE)); } private static class Outer { private int intValue

kill -3 to get java thread dump

由 99封情书 提交于 2019-11-26 06:59:35
问题 I am using kill -3 command to see the JVM\'s thread dump in unix. But where can I find the output of this kill command? I am lost!! 回答1: You could alternatively use jstack (Included with JDK) to take a thread dump and write the output wherever you want. Is that not available in a unix environment? jstack PID > outfile 回答2: The thread dump is written to the system out of the VM on which you executed the kill -3 . If you are redirecting the console output of the JVM to a file, the thread dump

List of tables, db schema, dump etc using the Python sqlite3 API

由 我只是一个虾纸丫 提交于 2019-11-26 06:17:04
问题 For some reason I can\'t find a way to get the equivalents of sqlite\'s interactive shell commands: .tables .dump using the Python sqlite3 API. Is there anything like that? 回答1: You can fetch the list of tables and schemata by querying the SQLITE_MASTER table: sqlite> .tab job snmptarget t1 t2 t3 sqlite> select name from sqlite_master where type = 'table'; job t1 t2 snmptarget t3 sqlite> .schema job CREATE TABLE job ( id INTEGER PRIMARY KEY, data VARCHAR ); sqlite> select sql from sqlite

Migrate from Oracle to MySQL

由 回眸只為那壹抹淺笑 提交于 2019-11-26 03:58:15
问题 We ran into serious performance problems with our Oracle database and we would like to try to migrate it to a MySQL-based database (either MySQL directly or, more preferably, Infobright). The thing is, we need to let the old and the new system overlap for at least some weeks if not months, before we actually know, if all the features of the new database match our needs. So, here is our situation: The Oracle database consists of multiple tables with each millions of rows. During the day, there

Convert a string representation of a hex dump to a byte array using Java?

由 倾然丶 夕夏残阳落幕 提交于 2019-11-25 21:39:02
问题 I am looking for a way to convert a long string (from a dump), that represents hex values into a byte array. I couldn\'t have phrased it better than the person that posted the same question here. But to keep it original, I\'ll phrase it my own way: suppose I have a string \"00A0BF\" that I would like interpreted as the byte[] {0x00,0xA0,0xBf} what should I do? I am a Java novice and ended up using BigInteger and watching out for leading hex zeros. But I think it is ugly and I am sure I am
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