2015-11-13 14:44:44,681 ERROR [main]: Datanucleus.datastore (Log4JLogger.java:error ())-an exception is thrown while Adding/validating Class (es): Specified key was too long; Max key length is bytesCom.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:Specified key was too long; Max key length
Issue create Table:specified Key was too long;Max key length is 767 bytes reason database table is UTF8 encoded, where varchar (255) column has a unique key index and MySQL by default the index of a single column cannot exceed 767 bits (different versions may differ)So UTF8 character encoding, 255*3 byte exceeds the limit resolution 1 using INNODB engine, 2 enabl
Label:Specified Key was too long; Max key length is 767 bytesDescription: An unhandled exception occurred during the execution of the current WEB request. Check the stack trace information For more information about the error and the source of the error in your code.Exception Details: MySql.Data.MySqlClient.MySqlException:Specified key was too long; Max key lengt
Recently looking for the PCI interface of the N more strange rare board, incidentally found that the PCI interface there are many kinds, there are long and short, is basically dizzy. So there are so many different shapes that I've found about explaining why the cards are called PCI interfaces.
the difference between PCI and Pci-x
the difference between PCI and PCI-E
Here's what I copied from Baidu:
Firs
Because the project needs to configure a refresh time in the configuration file, the data taken out of the configuration file is definitely a string, and then the string with the operator is converted to a long type. The specific code is as follows:In the configuration file:Reflash_time = (2*60*1000)The Java code takes
Label: style HTTP strong ar Div HTML time htm Deep Affection [Original sentence]: Hui will be hurt, and his feelings will not be long-lived, and he will be insulted. He is a modest gentleman and gentle as Yu. [Explanation]: a person who is too smart and wise will be damaged by himself. Those who are too addicted and persistent will not last for a
segment not captured, this error occurs very high frequency, I think this should be the TCP link exception related to the error, Therefore, I found the relevant article, found this: Capture packet analysis of "TCP Previous segment not captured";
Links: https://my.oschina.net/moooofly/blog/804568
The article describes a variety of reasons, listed a kind of, and posted the relevant capture package diagram, I a contrast, found to be almost the same as mine, but I do not understand the true mea
Ubuntu Terminal shows the path name is too long how to modify? Ubuntu default terminal, after entering many levels of the directory, the previous prompt will show the full path, so that the command line is too long, people feel uncomfortable, now teach you a way to modify the command line to display only the last level
The example in this article describes the way Android implements a partial or scrolling display when TextView text is too long. Share to everyone for your reference, specific as follows:
There is a Ellipsize property in the TextView that shows how the control should appear when the text is too
String
1. This code is the main body that handles too long strings;
void ItemDataBound (object sender, DataGridItemEventArgs e){Get the string to be displayedstring title = Getthestring ();
Returns the updated text for the specified columnString newtext = Adjusttextfordisplay (title, 1, grid);Set the text including the ToolTip when necessaryE.ITEM.CELLS[1]. Text = NewText;}
The function of the 2.AdjustTextF
When indexing, the database calculates that the length of the key is incremented by the char length of all the fields that are used by index and then multiplied by the following scale to not exceed the specified key length of 1000:Latin1 = 1 byte = 1 characterUft8 = 3 byte = 1 characterGBK = 2 byte = 1 characterFor example, to see more clearly, take GBK as an example:CREATE UNIQUE INDEX ' Unique_record ' on reports (' Report_name ', ' report_client ',
Set fixed time period: 8.2---"8.5That is: two time periods, as long as the intersection can be filtered out:The following two SQL statements achieve the same effect:1: $sql = "SELECT * from Fs_ads where ' start_time ' 2:$sql = "SELECT * FROM (Select Ads_id,file_id,client_type,client_name,brand,model,cal_type Start_time,end_time,CaseWhen (start_time>= ' $SD ') then start_timeWhen (start_timeEnd as Start1,Cas
Silica gel (Silicone grease) is a liquid, but is not moisture and other volatile substances, is basically metal powder and silicone oil and other fillers are mixed.
The liquid component is mainly used to help the metal particles to be filled into the crevice of the metal when the first smear
The computer is like a television, as long as the maintenance is good, can use a decade eight years, but the computer is different from the television, because the computer equipment and system update very fast, every year will come out a lot of updates faster dongdong, so under normal circumstances, the computer can b
For a long time, there is a software concept. Also wrote some code. After writing a few more ideas. Today, the panda and Zhang talked about the idea again. Specifically, this is true:
[Specific ideas, temporary confidentiality]
This is as part of helping teachers deal with the results, which
Today, the number of users using computer win7 systems is growing. Compared to the win7 system download the Open machine is indeed more than the XP system to download the machine will be slower. But recently some users said that the shutdown time is too long, how is it? How
The project encountered the upload video function, need to have a preview and get the video length function, because before using upload (if necessary can refer to my previous article), here do not repeat, directly used to upload video, but before uploading and the successful upload after the hook, not get the length:No time how to do it, can only use the native JS to obtain:After the upload is successful, bind the successful path to videoUse JS to ge
how to make div the default height if the content is too long automatically lengtheneda345500193 | Browse 4,966 times question not open answer | Report recommended at 2016-02-29 19:25:20 Best Answer
min-height:200px; * * When div content does not exceed 200px height, div height is 200px*/Height:auto; * * When the div content exceeds 200px height, div automaticall
In a LAN, when using SSH to log on to other machines, there are times when waiting for more than 10s to properly log on.Reason:Linux uses DNS to resolve the login IP by default, but on the LAN, there is no DNS server, and the machine is not addedThe binding of IP to the domain name (hostname), resulting in a lot of wasted time checking the host name.Workaround:1. Add IP and hostname bindings to the/etc/host
If the file data generated in the system is too long and then automatically truncated, what is the cause? This small editor has encountered problems caused by the loss of post data, let's take a look. If the file data generated in the system is too long and then automaticall
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