Talend query data in mysql based on inputs from hive -


I need to query a column in the hive and depending on the output I want to query it in MySQL DB.

The flow is something similar to:

  1. Get the list of questions hive tables, IDs
  2. Use the list of IDs to query the MySQL table >

    How do I do this?

    You just need to use a tHiveInput component to retrieve the ID to create your query And then you get two options, the easiest way or the hard (and better) way:

    For easy way you can then run from a tHiveInput component on a tFlowToIterate and then a tmySqlInput component Can iterate Your query in the TMySqlInput component will look something similar: 

      "SELECT a, b, c fROM x WHERE id = '" + ((integer) globalMap.get ("row1.id") ) + "'"

    Line 1 here represents the row running in your TflotOitrate. You can also get this variable by kissing the ctrl + space and selecting the tFlowToIterate_x.id option.

    You can add a tBufferOutput component to your tMySqlInput component to collect all iterations again and then read it with a TuberFinder input component for further processing.

    This is clearly a simple combination that is not the best method for efficiency and is definitely open for SQL injection. But this is a difficult and ready way.

    Your other (hard but potentially better) option is to use a parameterized query using a tMySqlRow component (currently not supported in tmySqlInput component as Tamnand 5.4).

    In Talend, some details about parameterized queries go into the form of a solution of another problem (increasing efficiency) as mentioned in the answer, there is more details on parameterized queries.


-

Comments

Post a Comment

Popular posts from this blog

sqlite3 - UPDATE a table from the SELECT of another one -

I have the first table article where some data is missing. In the table, articles_tmp I have a part of the missing data. So I want to update the articles. Where the path path is data in articles_tmp.path where the path is not zero . With SQLite , it does not work: update article SET path = (SELECT at.path FROM Articles_tmp as AS, WHERE at.article_id = a.id and a.asp, the text is in the form and not on. It has been transmitted) where the path is null MS Access Along with, it works fine: Update Articles Join the Inner Articles at articles_tmp articles.id = articles_tmp.id SETP articles.path = articles_tmp.path Can anyone help? Sin CE SQL Server Syntax, which I provided, was not working, here this solution With whom I have come. A little modification of your original query, but with my "correlation" suggestion added. There is a SQL Bella for this: Here is the code: update article SET path = (SELECT path from articles_tmp AS T WHERE t.id
Read more

c# - Showing a SelectedItem's Property -

So I have enabled a rightclick option for my DataGrid. I want to display the only chosen property but it is not behaving like what I would like it to display my name and additional. Public category Paymentinfo {public int PaymentNo {get; Set; } Public string date {get; Set; } Public Double Pay {get; Set; } Public Double Principle {get; Set; } Public Double Interest {get; Set; } Public Double Balance {Received; Set; }} Private Zero MenuItem_OnClick (Object Sender, RoutedEventArgs e) {MessageBox.Show (AmortGrid.SelectedItem.ToString ()); } I'm trying to apply it without using a View Module! If I place a breakpoint where the messagebox and the recipient place it on selected ITEM, then this property will display the payment. A date-payment-principle-interest-balance is the only value that needs payment. Was hoping that it would be something like this MessageBox.Show (AmortGrid.SelectedItem.PaymentNo.ToString ()); When you call ToString () So you get the class typ
Read more

javascript - Render HTML after each iteration in loop -

I'm trying to gradually increase the font size of text on a web page. The code works in my place, although the new HTML / CSS does not render after every iteration of the loop and when all this is done, then display only the text of 100 px size. To see the text as if it is slowly zooming, I need to do this JavaScript is down because it is being used from a different file here is what I have ... < Pre> & lt; P class = "game-title" style = "font-size: 50px" & gt; Test & lt; / P & gt; Function sleep (milliseconds) {var start = new date (). GetTime (); For (var i = 0; i & lt; 1e7; i ++) {if ((new date). GetTime () - start) & gt; Milliseconds {break; CSS ('font-size', 'parseInt ($ (' game-title '). CSS (' font-size ')) + 1 + "pixels"); } While (parasont ($ ('# text'). Css ('font-size')) & lt; = 100) {sleep (1000); IncreaseSize (); Using CSS: Use of jQuery (sample):
Read more