blob

Copying data from LOB Column to Long Raw Column

家住魔仙堡 提交于 2019-12-02 17:04:15
问题 I was looking for a query which picks data from a table having Blob column and update a table having LONG RAW column. It seems Oracle supports only up to 4000 characters. Is there a way to copy full data from blob to long raw. I was using the follwing query insert into APPDBA.QA_SOFTWARE_DUMMY select SOFTWARE_ID, UPDATED_BY, CREATE_CHANGE_DATE, FILE_NAME, DBMS_LOB.SUBSTR(SOFTWARE_FILE, 4000) SOFTWARE_FILE, SOFTWARE_TYPE from APPDBA.QA_SOFTWARE_DUMMY_TEST ; but DBMS_LOB.SUBSTR supports only

Extended ASCII characters in Oracle Text blob not loading into HIVE correctly, showing as '?' instead

北战南征 提交于 2019-12-02 17:02:10
问题 I have text blob data in oracle and I have imported using sqoop into HIVE in Binary. Source blob is textual data with extended ASCII characters in it but in HIVE these special characters are not correct in HIVE. I have tried by creating table using hcat -e and then loaded data in hive using sqoop with hcatalog. I have tried using hcatalog. Created table with Blob in oracle, then created equivalent table in HIVE but set as Binary instead of Blob. Insert sample data with text and special

python blob操作

我是研究僧i 提交于 2019-12-02 16:04:57
最近在学习使用Python,操作Oracle数据库采用的是cx_Oracle模块。 对于基本字段,都可以正常操作。但是对于Blob字段,我试试好几次,都没成功。下面贴出测试代码,与大家讨论讨论。 这是操作的持久对象。本人对Python刚刚接触,不知道Python有没有好的ORM框架。 class Report(object): selectSql="select RPTID,CLGID,RPTNAME,RPTTYPE,RPTDESC,QUALITYSIGNALS,DISPLAYSETTING,EXCELRANGE,HTMLTEMPLATE from rpt_report order by rptid" createTableSql='''/*==============================================================*//* Table: RPT_REPORT *//*==============================================================*/create table RPT_REPORT ( RPTID NUMBER not null, CLGID NUMBER, RPTNAME VARCHAR2(50) not null, RPTTYPE NUMBER not null,

how to convert byte array to pdf and download

坚强是说给别人听的谎言 提交于 2019-12-02 15:54:33
问题 I am trying to do a simple task of downloading a http response to a pdf. I am generating a pdf file but I am getting an error of "Failed to open PDF". Here is what the response looks like. And here is what I am doing. let blob = new Blob([response.data], { type: 'application/pdf' }) FileSaver.saveAs(blob, 'foo.pdf') 回答1: The string from the response seem to be Base-64 encoded (ref. fiddle). You can decode it using fetch() (or XMLHttpRequest() for older browsers): fetch("data:application/pdf

Retrieve image from Oracle DB

梦想的初衷 提交于 2019-12-02 15:51:06
问题 So, i am using a web api to retrieve a image!! But, at the DB the image is a LongRaw. Im seeing at the google that i need to use the OracleDbType.Blob But, when i try to use this, public IEnumerable<FotoEnvolvido> GetFoto(string suspid) { DataSet lretorno = new DataSet(); string connectionString = GetConnectionString(); using (OracleConnection connection = new OracleConnection()) { connection.ConnectionString = connectionString; OracleDataReader reader = null; OracleCommand cmd = new

二十五、clob与blob的区别。

扶醉桌前 提交于 2019-12-02 15:21:48
CLOB 定义   数据库中的一种保存文件所使用的类型。   Character Large Object   SQL 类型 CLOB 在 JavaTM 编程语言中的映射关系。SQL CLOB 是内置类型,它将字符大对象 (Character Large Object) 存储为数据库表某一行中的一个列值。默认情况下,驱动程序使用 SQL locator(CLOB) 实现 Clob 对象,这意味着 CLOB 对象包含一个指向 SQL CLOB 数据的逻辑指针而不是数据本身。Clob 对象在它被创建的事务处理期间有效。   在一些数据库系统里,也使用Text 作为CLOB的别名,比如SQL Server BLOB的含义   BLOB (binary large object),二进制大对象,是一个可以存储二进制文件的容器。   在计算机中,BLOB常常是数据库中用来存储二进制文件的字段类型。   BLOB是一个大文件,典型的BLOB是一张图片或一个声音文件,由于它们的尺寸,必须使用特殊的方式来处理(例如:上传、下载或者存放到一个数据库)。   根据Eric Raymond的说法,处理BLOB的主要思想就是让文件处理器(如数据库管理器)不去理会文件是什么,而是关心如何去处理它。 但也有专家强调,这种处理大数据对象的方法是把双刃剑,它有可能引发一些问题,如存储的二进制文件过大

Binary data not stored properly in MySQL

亡梦爱人 提交于 2019-12-02 14:23:35
I want to store a base64_encoded string as binary data. So use base64_decode() on the string before inserting in a LONGBLOB field of MySQL. So far so good, however when I retrieve the data from MySQL, I can't generate the correct base64_encoded string which I have started with... How is this possible? Thanks in advance EDIT The stored data is an encrypted string with AES-256CBC OPENSSL encryption routine. CODE For my code I use OpenSSL to encrypt a string $string = "Test"; $IV = "1234567890123456"; $key = "12345678901234561234567890123456"; $encrypted = openssl_encrypt($string, "AES-256-CBC",

MySQL blob: how to get just a subset of the stored data

喜欢而已 提交于 2019-12-02 14:08:59
问题 I would like to use MYSQL as a storage system for a huge number of files. I would like to read/write just a portion of the data stored in a column (data is stored as bytes) so I don't have to load the entire file into the application (because it can be > than a GB). So, in brief, I would like to have random read/write access in a blob column without loading the entire data into memory. Are there functions available to perform these operations? Thank you. 回答1: MySQL treats blobs the same as

php: reversing mysql_real_escape_string's effects on binary

假如想象 提交于 2019-12-02 13:38:15
问题 I built a webpage where users can submit a PDF which is then inserted into a MySQL database in a mediumblob for retrieval later. This all works fine, except when the PDF contains images or embedded fonts, in which case the images are corrupted and any text using the font disappears (Acrobat display a message about the missing font). I've determined the problem occurs from my passing the pdf data through the mysql_real_escape_string_function. I have switched to base64_encode/base64_decode on

Import blob through SAS from ORACLE DB

六眼飞鱼酱① 提交于 2019-12-02 12:09:48
问题 Good time of a day to everyone. I face with a huge problem during my work on previous week. Here ia the deal: I need to download exel file (blob) from ORACLE database through SAS. I am using: First step i need to get data from oracle. I used the construction (blob file is nearly 100kb): proc sql; connect to oracle; create table SASTBL as select * from connection to oracle ( select dbms_lob.substr(myblobfield,1,32767) as blob_1, dbms_lob.substr(myblobfield,32768,32767) as blob_2, dbms_lob