db2

Image uploading and Retrieval from DB2

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问题 H! I'm trying to upload an image in a DB2 database. The image size is a JPG (6.76 kb - 6924 bytes). The database table has a BLOB field of length 1048576. My code to insert the image is as follows: If fileup.PostedFile IsNot Nothing AndAlso fileup.PostedFile.FileName <> "" Then Dim imagesize As Byte() = New Byte(fileup.PostedFile.ContentLength - 1) {} Dim uploadedimage1 As HttpPostedFile = fileup.PostedFile uploadedimage1.InputStream.Read(imagesize, 0, CInt(fileup.PostedFile.ContentLength))

DB2 Exception handling

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问题 The problem that I am facing is primarily on Exception Handling! When an exception occurs I want to put that data in another log table with the error message. However, in DB2 I am not able to figure out a way to retrieve the corresponding error message for the raised SQLSTATE. PS: I have a stored procedure for this migration and I am not using any other language to call it. We could do this through SQLERRM in oracle; probably it should be a small thing, still for some strange reasons I have

DB2 fetch failure error

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问题 Am using DB2 database connection with PHP. When I run the particular query, it throws the below error Error : db2_fetch_assoc(): Fetch Failure in... The query will be like this. SELECT UNIX_TIMESTAMP(concat('2011-07-18 ', hour)) AS orderTime from schedules The query executes well. But When I try to fetch the records, it throws error. The hour value will be like '08:30:00' 回答1: You Should run the same query on DB2 control center or db2cmd first, Then error can be more clear. Moreover you can

DB2表空间

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https://www.ibm.com/developerworks/cn/data/library/techarticles/dm-0902yuancg/ 临时表空间的使用 (sorts or joins) (1) 最好和大多数数据表空间的页大小一致 (2) 批量和顺序的访问，就是说数据行被批量的写入和读取。所以较大的页大小会有利于性能，减少逻辑和物理io 平均行大小小于页大小除以255 (32k*1024/255 = 128byte) 最大255行可以存在于任何页,无论页大小是多少 15byte 在 4k页上会更好 (4k*1024/255 = 16byte) page size过大，会造成浪费 (3) 共享数据表空间的bufferpools (4) reorg table 时，要有匹配的page size，才能使用临时表空间。直接在目标表的表空间重组，需要额外的空间 (5) 添加一个8K 页大小的临时表空间，并使用一个较大的bufferpool。优化器通常会选择较大buffer的临时表空间 (6) 一般情况下，定义具有相同页大小的多个临时表空间没有什么好处 (7) 数据库错误 SQL1585N A system temporary table space with sufficient page size does not exist. SQLSTATE=54048

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DB2缓冲池： 1、缓冲池是由数据库管理分配的一个主存空间部分。缓冲池的目的是从磁盘高速缓存表和索引数据。所有数据库都有自己的缓冲池。默认缓冲池是在创建新数据库时创建的。它被称为：“IBMDEFAULTBP"。 2、每个表空间与数据库中的一个特定的表空间相关联。一个表空间与一个缓冲池相关联。表空间和缓冲池的大小必须一致。 DB2表空间： 1、表空间是一种存储结构。它包含表，索引，大对象和长数据。它可以被用于组织数据库的数据为逻辑存储组，表空间存储在数据库分区组。 DB2存储组： 1、一组存储路径用来存储数据库表或对象。是一个存储组。 DB2模式： 1、模式是数据库中的逻辑分类名对象的集合。 2、模式可以包含表、函数、索引、表空间、过程、触发器等。来源： https://www.cnblogs.com/jsersudo/p/11506772.html

db2数据库磁盘存储

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一次完整的IO操作时间=磁盘轴旋转的时间（旋转延迟）+磁盘臂移动时间（寻到时间）+数据传输时间。一次完整的IO时间的经验值是1/80秒，所以对于大型的数据库而言，频繁的IO操作会将微不足道的时间积累的非常可观。 db2 实际数据库包含许多逻辑对象和物理对象。表，视图，索引，模式，触发器，存储过程，程序包等数据库对象。缓冲池、日志文件、表空间物理存储、表空间容器、目录、文件系统或裸设备。这些对象一部分（比如表或视图）帮助决定如何对数据进行组织，其他对象（比如表空间）涉及数据库的物理实现；最后（比如缓冲池和其他内存对象）处理如何管理数据库性能。另外一些对象（比如日志文件）处理数据库的可恢复性。表空间可以跨许多容器，这就意味着可以突破操作系统对于一个容器可以包含的数据量的限制。操作系统的最小存储单位是块，在Linux中最小的块是512字节，在windows中，最小的存储单位是1kb, 而数据库中最小的事数据页。DB2中有4,8,16,32kb几种数据页。db2 在写物理存储时，为了保证写的吞吐量，引入了更大的单位extent，它是整数倍的datapage的大小。而表空间容器又是由很多extent组成，同时表空间又由很多容器组成。所以一般可以理解为多个extent组成一个container，多个container组成表空间。 DB2中有三种管理类型的表空间系统管理表空间

Pass Array as parameter in DB2 Stored Procedure

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问题 I am trying to create a stored procedure which takes an array as a parameter and in the WHILE loop iterates through this array and adds the chars into a table. For example if I had an array of ['a','b','c'] I would want to pass this into my stored procedure and the characters 'a' , 'b' and 'c' to be placed into a table. My SP creates successfully, but I am having issues when I try to call my procedure. Can anybody point me towards how to pass in an array? My procedure is as follows.... DROP

DB2 jdbc connection error Connection refused. ERRORCODE=-4499, SQLSTATE=08001

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问题 I have a new DB2 server (v10.5.0.3), and I can connect to the database locally just fine. When trying to connect from a remote server using JDBC I am getting the "Connection refused. ERRORCODE=-4499, SQLSTATE=08001" error. Based on information found here https://www-304.ibm.com/support/docview.wss?uid=swg21403644 I have confirmed that [db2inst1@db2 ~]$ db2set -all [i] DB2COMM=TCPIP [i] DB2AUTOSTART=YES [g] DB2SYSTEM=db2.xxxx.com [g] DB2INSTDEF=db2inst1 [g] DB2ADMINSERVER=xxxxxx and [db2inst1

DB2 Stored Procedure: Dynamically Building a Select Statement for cursor

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问题 I am fairly new to stored procedures. I naively thought that I could build up a select statement as follows. I cannot, and some of you will grin with what I came up with. How does one do what I am trying to do though? Thanks in advance. CREATE PROCEDURE GET_CUSTOMER_FOR_BORROWER_LETTER ( IN APPLICATION_ID INTEGER, IN GET_GUARANTOR INTEGER, IN GET_PREFERRED_CONTACT INTEGER ) DYNAMIC RESULT SETS 1 READS SQL DATA P1:BEGIN DECLARE selectStmt VARCHAR(800); DECLARE selectStmtPreferred VARCHAR(400);

iDB2 Select command with parameters returning SQL0418

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问题 I'm developing a .NET application that connects to a DB2 iSeries 7.1 database, using the IBM.Data.DB2.iSeries.dll. I need to do a SELECT command that has n parameters which are defined in the query as @paramX , setting the parameter values afterwards, but when I run the code I get a SQL048 Use of parameter marker not valid. . I've searched everywhere for documentation / examples but everything I've read is in par with the code I'm using. Am I missing something? If this is not valid, what is