blob

SQL Server: select on a table that contains a blob

由 北城以北 提交于 2019-12-11 10:59:59
问题 My app is querying - among the rest - a table that has a blob column and other metadata columns (no other LOB columns). I've read that if the object itself is not too big, it may still be stored inside the table and not as a link to itself. In this case, a 'SELECT' statement on such a table, even if it does not contain the blob, like: SELECT Date FROM MyTable might still retrieve the blob (in the server only), thus taking longer to perform. Is this true? Can anyone provide an explanation or a

mysql blob image displaying with php/html

由 ぃ、小莉子 提交于 2019-12-11 10:59:44
问题 After two days of search I come here with the hope of finding a solution. I am actually trying to store files in the database (mysql), I know how bad it is, but we actually need to do a footprint of the application, so we can't store them with the sources. I use 3 files: my form (classic html/php file) a php file who process data from form in order to put them into the DB another php file in order to get an image from the DB, sending a ID with GET The problem is that I can't display my image.

Convert Blob to Image in Go

由 别说谁变了你拦得住时间么 提交于 2019-12-11 10:42:25
问题 I'm trying to create an mbtiles server in Go. The file follows the mbtiles spec. The tile_data field is a BLOB and i'm trying to query the database and get the corresponding images (stored as blob types). So far the queries are OK but i'm getting corrupted tile_data results. I'm not sure how to map a SQLite BLOB to a proper Go data structure. So far i tried using var tileData []byte without success following this github gombtiles sample. The return value gets me an array of only 4 bytes which

Export a BLOB image from table

由 扶醉桌前 提交于 2019-12-11 09:57:48
问题 I have table in Oracle 11G R2, named as PERSON_IMAGE with ID (Number) and IMAGE(BLOB) fields. Now without using the application i need to export multiple BLOBs. How can i do this? Do we have any tool/ utility for this? Example will really assist me. 回答1: SQLDeveloper can do it: http://www.thatjeffsmith.com/archive/2014/05/exporting-multiple-blobs-with-oracle-sql-developer/ I just tried it in version 4.0.3 and although the interface was a little unintuitive, it worked fine. I ended up with a

Mysql query check the blob column type in where clause

由 廉价感情. 提交于 2019-12-11 09:27:15
问题 I found out that CONVERT(object USING utf8) is for converting blob to text, but it doesn't seem efficient in the where clause, like this: Select * from Page where CONVERT(Page.page_title USING utf8) = 'AccessibleComputing' Is this the only way and the correct way? because it is taking too much time. Or should I convert 'AccessibleComputing' to binary in a way and then put it there? 回答1: I tried this and it worked: Select * from Page where Page.page_title = 'AccessibleComputing' I think after

Including jsp in jsf gives exception as Input length = 1

由 柔情痞子 提交于 2019-12-11 08:53:27
问题 I have below code in jsp myDisplayImage.jsp <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JSP Page</title> </head> <body> <h1>Hello World!</h1> <%@ page import="java.sql.*"%> <%@ page import="java.io.*"%> <% Blob image = null; Connection con = null; byte[] imgData = null; Statement stmt = null; ResultSet rs = null; try { Class.forName("com.mysql.jdbc.Driver"); con = DriverManager.getConnection("jdbc:mysql://localhost:8889/mySacDB",

Convert a plot with ellipses to binary image in MATLAB

由 爱⌒轻易说出口 提交于 2019-12-11 08:52:05
问题 This is my first question here and a I have a plot in matlab, with some ellipses. I want to convert this plot to a binary image. Can someone help me? The image with the ellipses is shown here - Thanks in advance for any help! 回答1: Code %%// ---- Your Plot done until this point %%// Remove frames set(gca, 'visible', 'off') set(gcf, 'color', 'w'); %%// Get the figure as a uint8 variable im = export_fig; %// Output binary image BW = ~im2bw(uint8(255.*im2double(im)),0.99); Note: You need to get

Store a Blob from Java to BD: Data size bigger than max size for this type when is clearly not

由 大憨熊 提交于 2019-12-11 08:26:15
问题 Ok, here we go... I am trying to call a Stored Procedure (PL/SQL), one of the parameters is a blob, but when I execute the OracleCallableStatement I get this error: java.sql.SQLException: Data size bigger than max size for this type That is oh so very frustrating.. I have tried to do the following and fails... oracleCallableStatement.setBinaryStream(3, new ByteArrayInputStream(someByteArray), someByteArray.length); I get the same error with: oracleCallableStatement.setBytes(3, someByteArray);

save the content of HTML editor as an HTML file on desktop

由 纵饮孤独 提交于 2019-12-11 08:25:11
问题 I want to save the content of a TinyMce HTML editor by clicking on a button. The TinyMce is on a local installation, and I use it in Chrome. I have see this answer and that one but I am not able to implement them. When I click on the Save button, I don't get the download pop up, even though my code on JSfidle is working So here is my TinyMCEnote.hmlt (save in desktop/TinyMceLocal) <!DOCTYPE html> <html> <head> <script type="text/javascript"> function saveTextAsFile() { var textToWrite =

Showing an image blob in MVC2

由 柔情痞子 提交于 2019-12-11 08:09:01
问题 I'm trying (without success) to fetch a blob image from a service and show it as an image in html. my html is: <img src="<%: Url.Action("GetPersonImage", new { pid = Model.PersonId }) %>" alt="" /> witch shows in the Source as <img src="/demo4/ABook/GetPersonImage/?pid=210092" alt=""> my action is: public void GetPersonImage(int pid) { string src = so.GetPersonImage(pid); byte[] bytes = System.Text.Encoding.UTF8.GetBytes(src); Response.Clear(); Response.AddHeader("Content-Length", src.Length
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