Java Implementation Method for adding/deleting collection elements in Oracle databases

Oracle DatabaseMediumAdd/delete set ElementsHow to Implement the operation? Actually useJavaFunction can be easily implemented. This article mainly introduces this implementation method.

The source program is as follows:

 
 

  
  
package zgdx.action; import java.math.BigDecimal;  
  
  
import java.sql.Array;  
  
  
//import java.sql.Connection;  
  
  
import java.sql.DriverManager;  
  
  
import java.sql.SQLException;  
  
  
import java.util.ArrayList;  
  
  
import java.util.logging.Level;  
  
  
import java.util.logging.Logger;  
  
  
import oracle.jdbc.*;  
  
  
import oracle.sql.ARRAY;  
  
  
import oracle.sql.ArrayDescriptor; public class OraTools {  
  
  
    static public Array addElementOfArray(ARRAY ary, Object e){  
  
  
        try {  
  
  
            Object[] bigs = null;  
  
  
            if(ary==null)   bigs = new Object[0];  
  
  
            else  bigs =  (Object[]) ary.getArray();  
  
  
            for(int i=0; i<bigs.length; i++)  
  
  
                if(e.equals(bigs[i])){ return ary; }  
  
  
            Object[] objs = new Object[bigs.length+1];  
  
  
            for(int i=0; i<bigs.length; i++)  objs[i] = bigs[i];  
  
  
            objs[objs.length-1] = e;  
  
  
            OracleConnection conn = (OracleConnection) DriverManager.getConnection("jdbc:default:connection:");  
  
  
            //((OracleConnection)conn.unwrap(OracleConnection.class))  
  
  
            //Array arr = conn.createARRAY(typeName.toUpperCase(), objs );  //11g r1  
  
  
            Array arr = new ARRAY(ArrayDescriptor.createDescriptor( ary.getSQLTypeName(), conn), conn, objs);  
  
  
            return arr;  
  
  
        } catch (SQLException ex) {  
  
  
            //Logger.getLogger(OraTools.class.getName()).log(Level.SEVERE, null, ex);  
  
  
            System.err.println("ERROR! addElementOfVarray: " + ex.getMessage());  
  
  
            return ary;     }     static public Array delElementOfArray(ARRAY ary, Object e){  
  
  
        try {  
  
  
            if( ary==null)  return null;  
  
  
            Object[] bigs =  (Object[]) ary.getArray();  
  
  
            ArrayList list = new ArrayList(bigs.length);  
  
  
            for(int i=0; i<bigs.length; i++)  
  
  
                if( ! e.equals(bigs[i])){ list.add(bigs[i]); }  
  
  
            if(list.size()==bigs.length)  return ary;  
  
  
            Object[] objs = list.toArray();  
  
  
            OracleConnection conn = (OracleConnection) DriverManager.getConnection("jdbc:default:connection:");  
  
  
            //Array arr = conn.createARRAY(typeName.toUpperCase(), objs );  //11g r1  
  
  
            Array arr = new ARRAY(ArrayDescriptor.createDescriptor(ary.getSQLTypeName(), conn), conn, objs);  
  
  
            return arr;  
  
  
        } catch (SQLException ex) {  
  
  
            System.err.println("ERROR! addElementOfVarray: " + ex.getMessage());  
  
  
            return ary;     }  
  
  
}  
 
 

Then release: loadjava-f-v-user username/passwd-r OraTools. java

Create call spec:

 
 

  
  
CREATE OR REPLACE function addElementOfInt_nt(ary int_nt, dept_id NUMBER)   
  
  
 
  
  
return int_nt AS LANGUAGE JAVA NAME 'zgdx.action.OraTools.addElementOfArray(java.sql.Array, java.lang.Object) return java.sql.Array'; 
 
 

Test: update test1 set cates = addElementOfInt_nt (cates, 10) where code = 1;

The implementation of Java functions for adding and deleting collection elements in Oracle databases is introduced here. I hope this introduction will be helpful to you.