Implement UpdateCount

src/interfaces/jdbc/CHANGELOG

+Sun Apr 11 17:00:00 BST 1999
+	- getUpdateCount() now returns the actual update count (before it
+	  simply returned 1 for everything).
+	- added some updates to example.basic so it would test the new update
+	  count code.
+	- corrected typo in a comment in Statement.java
+
 Mon Jan 25 19:45:00 GMT 1999
 	- created subfolders example/corba and example/corba/idl to hold the
 	  new example showing how to hook CORBA and PostgreSQL via JDBC

src/interfaces/jdbc/example/basic.java

@@ -77,6 +77,10 @@ public class basic
     st.executeUpdate("insert into basic values (2,1)");
     st.executeUpdate("insert into basic values (3,1)");
     
+    // Now change the value of b from 1 to 8
+    st.executeUpdate("update basic set b=8");
+    System.out.println("Updated "+st.getUpdateCount()+" rows");
+    
     // For large inserts, a PreparedStatement is more efficient, because it
     // supports the idea of precompiling the SQL statement, and to store
     // directly, a Java object into any column. PostgreSQL doesnt support

src/interfaces/jdbc/postgresql/Connection.java

@@ -10,7 +10,7 @@ import postgresql.largeobject.*;
 import postgresql.util.*;
 
 /**
- * $Id: Connection.java,v 1.14 1999/01/17 04:51:50 momjian Exp $
+ * $Id: Connection.java,v 1.15 1999/04/11 18:03:00 peter Exp $
  *
  * This abstract class is used by postgresql.Driver to open either the JDBC1 or
  * JDBC2 versions of the Connection class.
@@ -321,6 +321,7 @@ public abstract class Connection
 	    int fqp = 0;
 	    boolean hfr = false;
 	    String recv_status = null, msg;
+		int update_count = 1;
 	    SQLException final_error = null;
 	    
 	    if (sql.length() > 8192)
@@ -358,6 +359,15 @@ public abstract class Connection
 			    break;
 			case 'C':	// Command Status
 			    recv_status = pg_stream.ReceiveString(8192);
+				
+				// Now handle the update count correctly.
+				if(recv_status.startsWith("INSERT") || recv_status.startsWith("UPDATE")) {
+					try {
+						update_count = Integer.parseInt(recv_status.substring(1+recv_status.lastIndexOf(' ')));
+					} catch(NumberFormatException nfe) {
+						throw new SQLException("Unable to fathom update count \""+recv_status+"\"");
+					}
+				}
 			    if (fields != null)
 				hfr = true;
 			    else
@@ -414,8 +424,8 @@ public abstract class Connection
 		}
 	    if (final_error != null)
 		throw final_error;
-	    return getResultSet(this, fields, tuples, recv_status, 1);
-	    //return new ResultSet(this, fields, tuples, recv_status, 1);
+		
+	    return getResultSet(this, fields, tuples, recv_status, update_count);
 	}
     }
 

src/interfaces/jdbc/postgresql/Statement.java

@@ -35,7 +35,7 @@ public class Statement implements java.sql.Statement
 	}
 
 	/**
-	 * Execute a SQL statement that retruns a single ResultSet
+	 * Execute a SQL statement that returns a single ResultSet
 	 *
 	 * @param sql typically a static SQL SELECT statement
 	 * @return a ResulSet that contains the data produced by the query