java - How to apply aggregate functions(like MIN, MAX, COUNT) in JCR-SQL2? -



java - How to apply aggregate functions(like MIN, MAX, COUNT) in JCR-SQL2? -

i have records stored nodes in jcr , name of node primary key. eg 1,2,3. problem starts here,

the records follows 1,2,6,53,54

where numbers above nodes under emp unstructured node. if do

int count=empnode.getnodeiterator().getsize() i 5 there 5 nodes

so count++ gives me 6 6 exists, so can't create node name 6 under emp[nt:unstructred], thats why want apply max(nodenames) in query. should ?

update :: utilize cq5.5. emp unstructered node under content /content/emp. under this(emp) have unstructered nodes hold data. , these node have names 1,2, etc

i tried cq5.4 instance find soloution. unfortunatly tries not successful. when used keywords 'sql2 count' google, found this page. there asked same question , reply was

there no count(*) or grouping selector in jcr sql 1, xpath [2] or jcr-sql2/aqm [3].

to implement such tag cloud, can run 1 query fetches content containing relevant "tag" property:

//element(*, my:article)[@tag]

and iterate on result , count tags on application side looking @ tag property values , using hashmap (tagid -> count).

http://www.day.com/specs/jcr/1.0/ (section 8.5)

http://www.day.com/specs/jcr/1.0/ (section 6.6)

http://www.day.com/specs/jcr/2.0/6_query.html

i think can connect reply max() , min().

java cq5 jcr jcr-sql2

Comments

Post a Comment

Popular posts from this blog

java Multi query from Mysql using netbeans -

java Multi query from Mysql using netbeans - i have java code retrieve info mysql appropriate code in netbeans.the code below. want multi query such illustration finding total number of products , on.could help me please. in advance import java.sql.*; public class javamysqlselectexample { public static void main(string[] args) { seek { string mydriver = "com.mysql.jdbc.driver"; string myurl = "jdbc:mysql://localhost/sample"; class.forname(mydriver); connection conn = drivermanager.getconnection(myurl, "root", "mypasscode1"); string query = "select * products"; statement st = conn.createstatement(); resultset rs = st.executequery(query); while (rs.next()==true) { int code = rs.getint("code"); string productname = rs.getstring("product_name"); string producttype = rs.getstring("product_type"); system.out.format(" %d, %s, %s\n", code, pr
Read more

c# - DotNetZip fails with "stream does not support seek operations" -

c# - DotNetZip fails with "stream does not support seek operations" - i using dotnetzip in c# unzip stream follows: public static void unzipfromstream(stream stream, string outdir) { //omit seek grab block using (zipfile zip = zipfile.read(stream)){ foreach (zipentry e in zip){ e.extract(outdir, extractexistingfileaction.overwritesilently); } } } stream obtained using webclient client = new webclient(); stream fs = client.openread(url); however, got next exception exception during extracting zip stream system.notsupportedexception: stream not back upwards seek operations. @ system.net.connectstream.get_position() @ ionic.zip.zipfile.read(stream zipstream, textwriter statusmessagewriter, encoding encoding, eventhandler`1 readprogress) on server side(asp.net mvc 4), returning filepathresult or filestreamresult both caused exception. should obtain stream differently on client side? or how create server homec
Read more

c++ - StartServiceCtrlDispatcher don't can access 1063 error -

c++ - StartServiceCtrlDispatcher don't can access 1063 error - i write on c++ service , have error, , don't can fixed it. my service main function int main (int argc, tchar *argv[]) {dword f; for(int i=0;i<113;i++) f = getlasterror(); servicepath = lptstr(argv[0]); outputdebugstring(_t("my sample service: main: entry")); //installservice(); service_table_entry servicetable[] = { {service_name, (lpservice_main_function) servicemain}, {null, null} }; // startservice(); if(!startservicectrldispatcher(servicetable)) { f = getlasterror(); //addlogmessage("error: startservicectrldispatcher"); } else if( memcmp(argv[argc-1],"install",7)) { installservice(); } else if( memcmp(argv[argc-1],"remove",6)) { removeservice(); } else if( memcmp(argv[argc-1],"start",5)) { startservice(); } else if( memcmp(argv[argc-1],"stop",4))
Read more