Polybase performance issues -


i trying connect hadoop clusters (cloudera) polybase 2016. when querying hadoop clusters polybase, performance getting slow. in fact, 50 times slower local sql server tables on same data size. did 1 has worked on improve query performance on polybase?

regards,

ritu ranjan


Comments

Post a Comment

Popular posts from this blog

android - ConstraintLayout: Realign baseline constraint in case if dependent view visibility was set to GONE -

Image
is there way realign baseline constraint textview in case if dependent view visibility set gone? my layout code: <android.support.constraint.constraintlayout android:layout_width="match_parent" android:layout_height="wrap_content"> <textview android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="test title" android:textcolor="@color/black" android:textsize="24sp" app:layout_constraintleft_toleftof="parent" app:layout_constraintright_torightof="parent"/> <textview android:id="@+id/subtitle1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="subtitle 1" android:textsize="11sp" app:layout_constraintb...
Read more

How to put a lock and transaction on table using spring 4 or above using jdbcTemplate and annotations like @Transactional? -

i trying put lock on table while writing on table , if happened in between roll-back . trying convert below code lock table test_g1 read; lock table test_g write; -- begin; start transaction; insert test_g1 values(143); insert test_g values(145); select * test_g1; select * test_g; rollback; select * test_g; unlock tables; how convert above code @transactional spring jdbctemplate code? @transactional(rollbackfor={dataaccessexception.class}) public void test(){ jdbctemplate.execute("insert test1 (id, nam) values (4, 'a')"); throw new dataaccessexception("error") { }; } here trying throw error, insert statement should rollback it's not happening . thanks edit-1 attaching code , doing in jdbcdaoimpl.java , mentioned problem comment above test() . app.java package com.cgiri.javabrains.spring4; import org.springframework.beans.factory.annotation.autowired; import org.springframework.context.applic...
Read more

c# - Update a combobox from a presenter (MVP) -

i using mvp in project, new in mvp. have 2 comboboxes. when select option in combobox, combobox should filled new data. this action in presenter. view 'view1' in presenter, , introduced combobox1 , combobox2 properties in 'view1', because need 'datasource', 'displaymember', 'valuemember' , 'refresh()' in method below. but, when using pattern, enough send property like public string combobox2 { { return combobox1.selectedvalue.tosstring(); } } into presenter not whole combobox. how can solve problem? public void onselectedindexchangedcombobox1() { if (view1.combobox1.selectedindex == -1) { return; } datatable dt = tools.getdatatable("a path"); var query = (from o in dt.asenumerable() o.field<string>("afield") == farmerview.combobox1.selectedvalue.tostring() orderby o.field<string>("anotherfield") select...
Read more