In Cassandra how to select rows by multiple filters? -

-

मेरे पास नीचे की तरह एक तालिका है: टेबल टेस्ट तैयार करें (एक int; b int; c int; d int; प्राथमिक कुंजी ));

मैं 0 के साथ डेटा का चयन करना चाहता हूं; एक & lt; 10 और 0 & lt; बी एंड एलटी; 10, मुझे प्राथमिक कुंजी कैसे सेट करनी चाहिए और मुझे सीक्यूएल क्वेरी कैसे चलानी चाहिए?

धन्यवाद!

विभाजन कुंजी पर रेंज ऑपरेटर (& lt;>) का उपयोग करने की अनुमति नहीं है जब तक कि आप बाइटऑर्डर्ड पार्टिशनर का उपयोग न करें जो प्रदर्शन से संबंधित कई कमियां हैं।

अन्यथा, डिफ़ॉल्ट Murmur3partitioner के साथ, आपके पास दो विकल्प हैं। पहला समाधान: 

  तालिका परीक्षण (एक int, b int, c int, d int, प्राथमिक कुंजी ((a, b)) बनाएँ;

फिर 1. में 1. एक्स के लिए 

  परीक्षण से * चुनें * जहां a = X और b (1,2,3,4,5 , 6,7,8,9,10)

दूसरा समाधान: 

  तालिका परीक्षण (एक int, b int, c int, d int , प्राथमिक कुंजी (ए, बी));

तब 

  परीक्षण से * चुनें * जहां एक (1,2,3,4,5,6,7,8,9,10) और बी & gt; = 1 और बी & lt; = 10;

Comments

Post a Comment

Popular posts from this blog

mysql - How to enter php data into a html multiple select box -

-
I am working on a page that will create a team. I just want to create a selection box which will list all the users of all the users. After that, the user can select more than one friend (i.e. 5) and can send the request to these 5 people to join the team but I am having problems I did this: Select $ sql = "Select i. *, Join * Connect with M * m.id = i.clique_id where adder_id =: id"; $ Stmt = $ db- & gt; Query ($ sql, array ('id' = & gt; $ _SESSION ['id'])); While ($ record = $ stmt-> fetch ()) {$ surname = $ record ['surname']; } and this: & lt; Select multiple = "true" name = "category" well id = "category" name = "category" category = "" & gt; & Lt; Option value = "& lt ;? php echo $ surname ;? & gt;" & Gt; & Lt ;? Php ek $ nickname; ? & Gt; & Lt; / Options & gt; & Lt; / Select & gt; But only a friend's nickname...
Read more

java - Can't add JTree to JPanel of a JInternalFrame -

-
Image
There are two panels in my JInternalframe. I want to add TopPanel to Jtree to nominate another. But I can not add Jaitari to the top of the panel. Please help me in this piece of code: DefaultMutableTreeNode root = new DefaultMutableTreeNode ("deck"); DefaultMutableTreeNode Item Clubs = New DefaultMutableTreeNode ("Club"); AddAllCard (itemClubs); Root.add (itemClubs); DefaultMutableTreeNode item = New DefaultMutableTreeNode ("Diamonds"); AddAllCard (itemDiamonds); Root.add (itemDiamonds); DefaultMutableTreeNode Itemspads = New DefaultMutableTreeNode ("Spades"); AddAllCard (itemSpades); Root.add (itemSpades); DefaultMutableTreeNode item increases = new DefaultMutableTreeNode ("heart"); AddAllCard (itemHearts); Root.add (itemHearts); Default Trimodel Tree Model = New DefaultTreeModel (Route); Tree = new jetty (tree modal); ScrollPane = new JScrollPane (tree); // scrollPane.setViewportView (tree); . ScrollPane.getViewport () add (tr...
Read more

c++ - Cassandra datastax cpp driver - avoiding unnecessary copies -

-
I use the following method to create my insert statement for Cassandra (using datastax cpp driver) : ssStmt1 & lt; & Lt; "Insert some table (...) value (....)" string sStatement1 = ssStmt1.str (); Castestring cass1 = cass_string_init (sStatement1.c_str ()); CassStatement * pStmt1 = cass_statement_new (cass1, 0); I have also tried the following: CassString cass1 = cass_string_init ("Enter some table (id, date, c) value (? ,?,?); "); CassStatement * pStmt1 = cass_statement_new (cass1, 3); Cass_statement_bind_uuid (pStmt1, 0, uuidKey); Cass_statement_bind_int64 (PSTMT1, 1, timestamp); Cass_statement_bind_string (pStmt1, 2, sSomething); The first pattern works with mixed keys, the second is not. The key has a timestamp and a UUID. Timestamp is one of two errors in the field (based on the used bond statement). If bound in this way: cass_statement_bind_int64_by_name (pStmt1, "date", timestamp); I get the following error: Inva...
Read more