Re: Bug #597: ResultSet.next() throws NullPointerException - Mailing list pgsql-bugs

This has been saved for the 7.3 release:

    http://candle.pha.pa.us/cgi-bin/pgpatches2

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pgsql-bugs@postgresql.org wrote:
> Craig Brown (cbrown@ecmarket.com) reports a bug with a severity of 2
> The lower the number the more severe it is.
>
> Short Description
> ResultSet.next() throws NullPointerException
>
> Long Description
> When invoking the next() method on a ResultSet that has been closed a NullPointerException is thrown.  Ideally, an
SQLExceptionstating that the ResultSet has been closed should be thrown. 
>
> This bug affects several other methods within the jdbc2/ResultSet class.
>
> Sample Code
> This patch fixes the above described problem.
>
> *** ./src/interfaces/jdbc/org/postgresql/errors.properties.orig Tue Feb 19 17:54:02 2002
> --- ./src/interfaces/jdbc/org/postgresql/errors.properties      Tue Feb 19 17:49:55 2002
> ***************
> *** 54,59 ****
> --- 54,60 ----
>   postgresql.res.badshort:Bad Short {0}
>   postgresql.res.badtime:Bad Time {0}
>   postgresql.res.badtimestamp:Bad Timestamp Format at {0} in {1}
> + postgresql.res.closed:The ResultSet has been closed.
>   postgresql.res.colname:The column name {0} not found.
>   postgresql.res.colrange:The column index is out of range.
>   postgresql.serial.interface:You cannot serialize an interface.
> *** ./src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java.orig      Tue Feb 19 17:53:46 2002
> --- ./src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java   Tue Feb 19 17:50:12 2002
> ***************
> *** 110,115 ****
> --- 110,118 ----
>          */
>         public boolean next() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 if (++current_row >= rows.size())
>                         return false;
>                 this_row = (byte [][])rows.elementAt(current_row);
> ***************
> *** 702,707 ****
> --- 705,713 ----
>          */
>         public java.sql.ResultSetMetaData getMetaData() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 return new ResultSetMetaData(rows, fields);
>         }
>
> ***************
> *** 828,833 ****
> --- 834,841 ----
>                 // index is 1-based, but internally we use 0-based indices
>                 int internalIndex;
>
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
>                 if (index == 0)
>                         throw new SQLException("Cannot move to index of 0");
>
> ***************
> *** 866,871 ****
> --- 874,882 ----
>
>         public void afterLast() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 final int rows_size = rows.size();
>                 if (rows_size > 0)
>                         current_row = rows_size;
> ***************
> *** 873,878 ****
> --- 884,892 ----
>
>         public void beforeFirst() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 if (rows.size() > 0)
>                         current_row = -1;
>         }
> ***************
> *** 891,896 ****
> --- 905,913 ----
>
>         public boolean first() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 if (rows.size() <= 0)
>                         return false;
>                 current_row = 0;
> ***************
> *** 1035,1040 ****
> --- 1052,1060 ----
>
>         public int getFetchSize() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 // new in 7.1: In this implementation we return the entire result set, so
>                 // here return the number of rows we have. Sub-classes can return a proper
>                 // value
> ***************
> *** 1078,1083 ****
> --- 1098,1106 ----
>
>         public int getRow() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 final int rows_size = rows.size();
>
>                 if (current_row < 0 || current_row >= rows_size)
> ***************
> *** 1108,1135 ****
> --- 1131,1173 ----
>
>         public boolean isAfterLast() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 final int rows_size = rows.size();
>                 return (current_row >= rows_size && rows_size > 0);
>         }
>
>         public boolean isBeforeFirst() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 return (current_row < 0 && rows.size() > 0);
>         }
>
>         public boolean isFirst() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 return (current_row == 0 && rows.size() >= 0);
>         }
>         public boolean isLast() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 final int rows_size = rows.size();
>                 return (current_row == rows_size - 1 && rows_size > 0);
>         }
>
>         public boolean last() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 final int rows_size = rows.size();
>                 if (rows_size <= 0)
>                         return false;
> ***************
> *** 1152,1157 ****
>
> --- 1190,1198 ----
>
>         public boolean previous() throws SQLException
>         {
> +               if (rows == null)
> +                       throw new PSQLException("postgresql.res.closed");
> +
>                 if (--current_row < 0)
>                         return false;
>                 this_row = (byte [][])rows.elementAt(current_row);
>
>
> No file was uploaded with this report
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>

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