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The getFirst() method of the class java.util.LinkedList returns the first element of the current list. Example Live Demo import java.util.*; public class LinkedListDemo { public static void main(String[] args) { LinkedList list = new LinkedList(); list.add("Hello"); list.add(2); list.add("Chocolate"); list.add("10"); System.out.println("LinkedList:" + list); System.out.println("First Element :" + list.getFirst()); } } Output LinkedList:[Hello, 2, Chocolate, 10] First Element :Hello
Following program creates an array with null values. Convert it a list with not-null values only and then get the array of that list.Exampleimport java.util.ArrayList; import java.util.List; public class Tester { public static void main(String[] args) { String[] array = {"I", null, "love", null, "Java" }; List values = new ArrayList(); for(String data: array) { if(data != null) { values.add(data); } } String[] target = values.toArray(new String[values.size()]); for(String data: target) { System.out.println(data + " "); } } }OutputI love Java
There will be a significant change in the output if we have the combination of NULL and other values in the list of strings, provided as arguments in FIELD() function. Following example will demonstrate it Example mysql> Select FIELD('good', 'Ram', 'is', 'good', 'boy'); +---------------------------------------+ | FIELD('good', 'Ram', 'is', 'good', 'boy') | +---------------------------------------+ | 3 | +---------------------------------------+ 1 row in set (0.00 sec) ... Read More
It will use both OLAP and Join engine. The join between the FACT and DIM will be executed in the OLAP engine and joins inside the attribute views will be executed in the JOIN engine so both the engines will be used.
The getLast() method of the class java.util.LinkedList returns the last element in this list.Example:import java.util.*; public class LinkedListDemo { public static void main(String[] args) { LinkedList list = new LinkedList(); list.add("Hello"); list.add(2); list.add("Chocolate"); list.add("10"); System.out.println("LinkedList:" + list); System.out.println("Last Element :" + list.getLast()); } }Output:LinkedList:[Hello, 2, Chocolate, 10] Last Element :10
In SAP HANA system, Session and Transaction Manager is responsible to keep track of all the executed transactions in HANA database. It includes both running transactions and closed transaction. When a transaction in HANA system is failed due to any reason, Transaction Manager informs corresponding engine to handle the error.Session Manager is responsible to manage open and closed sessions and to authorize all the transactions executed in HANA db.
The removeFirst() method of the java.util.LinkedList class removes and returns the first element from this list.Example:import java.util.*; public class LinkedListDemo { public static void main(String[] args) { LinkedList list = new LinkedList(); list.add("Hello"); list.add(2); list.add("Chocolate"); list.add("10"); System.out.println("LinkedList:" + list); System.out.println("First element:" + list.removeFirst()); System.out.println("LinkedList:" + list); } }Output:LinkedList:[Hello, 2, Chocolate, 10] First element:Hello LinkedList:[2, Chocolate, 10]
It consists of various components as mentioned above for processing of SQL statements from application users hosted on the top of HANA system.User requests via user interface/web browsers are sent to Web server hosting application which is communicated to SQL/MDX Processor in form of SQL queries. These are further segregated to different data engines in Index server according to query types.Session and Transaction Manager authorize SQL transactions and keep track of all the transactions either completed or running in the system.
The removeLast() method of the java.util.LinkedList class removes and returns the last element of this list.Example:import java.util.*; public class LinkedListDemo { public static void main(String[] args) { LinkedList list = new LinkedList(); list.add("Hello"); list.add(2); list.add("Chocolate"); list.add("10"); System.out.println("LinkedList:" + list); System.out.println("Last element:" + list.removeLast()); System.out.println("LinkedList:" + list); } }Output:LinkedList:[Hello, 2, Chocolate, 10] Last element:10 LinkedList:[Hello, 2, Chocolate]
Persistence layer is used in case of system failure, database corruption or power failure to restore the database to most recent save point in HANA. Persistence Layer is responsible for data and transaction log backup and also to store configuration of HANA system.Backup of data and transaction log files are taken as per Backup settings in HANA system configuration. It can be set to minutes, Hours and days and destination of backup is also defined under Backup settings.When a backup is run for data and transaction files, system takes the backup from all the servers in HANA system.Persistence Layer is ... Read More