package PWC321; /** * PL/Java implementation for PWC 321 * Task 2 * See * * * To compile on the local machine: $ export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64/ # if not already set $ mvn clean build $ scp target/PWC321-1.jar luca@rachel:/tmp * To install into PostgreSQL execute: select sqlj.install_jar( 'file:///tmp/PWC321-1.jar', 'PWC321', true ); select sqlj.set_classpath( 'public', 'PWC321' ); select pwc321.task2_pljava(); and then to redeploy: select sqlj.replace_jar( 'file:///tmp/PWC321-1.jar', 'PWC321', true ); */ import org.postgresql.pljava.*; import org.postgresql.pljava.annotation.Function; import static org.postgresql.pljava.annotation.Function.Effects.IMMUTABLE; import static org.postgresql.pljava.annotation.Function.OnNullInput.RETURNS_NULL; import java.util.*; import java.util.stream.*; import java.sql.SQLException; import java.util.logging.*; import java.sql.ResultSet; import java.sql.Date; public class Task2 { private final static Logger logger = Logger.getAnonymousLogger(); @Function( schema = "pwc321", onNullInput = RETURNS_NULL, effects = IMMUTABLE ) public static final boolean task2_pljava( String left, String right ) throws SQLException { logger.log( Level.INFO, "Entering pwc321.task2_pljava" ); return left.replaceAll( ".[#]", "" ).equals( right.replaceAll( ".[#]", "" ) ); } }