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ID Category Severity Reproducibility Date Submitted Last Update
0002541 [Quercus] minor always 03-20-08 08:41 05-29-08 17:21
Reporter ferg View Status public  
Assigned To ferg
Priority normal Resolution fixed Platform
Status closed   OS
Projection none   OS Version
ETA none Fixed in Version 3.2.0 Product Version 3.1.5
  Product Build
Summary 0002541: mysql fetch_field with DESCRIBE
Description (rep by jarmstrong)


I found the issue finally the metadata is not being returned for DESCRIBE
queries. So the part I haven't determined yet. Is metadata handled or
ignored for differnt SQL Statement types in Quercus? The ORM mapping within
CakePHP relies heavily on the metadata being returned from describe
statements.


** After some weird testing I just found the problem with the metadata not
being returned.
1) *Works* 'SELECT * FROM users'
2) *Fails* 'DESCRIBE users'

PHP Code.


    function resultSet(&$results) {
        $this->results =& $results;
        $this->map = array();
        
        
        $num_fields = mysqli_num_fields($results);
            
        $index = 0;
        $j = 0;
        while ($j < $num_fields) {
            $column = mysqli_fetch_field_direct($results, $j);
            
            if (!empty($column->table)) {
                $this->map[$index++] = array($column->table, $column->name);
            } else {
                $this->map[$index++] = array(0, $column->name);
            }
            $j++;
        }
    
    }
Steps To Reproduce
Additional Information
Attached Files

- Relationships

- Notes
(0002877)
ferg
03-24-08 08:40

 I found the problem, but I am not sure what the best solution for this would
be. The issue is that huge IF statement at the beginning of
Mysqli::fetchFieldDirect() is getting back a null value for the table name
with a "DESCRIBE users" statement, but standard SQL statements work fine.

Output from tests: (0000001 metadat.toString(), 0000002 my log.log entries showing
empty table name and valid field name)
--------------------------------------------------------
[23:06:53.921] {http--8080-0}
com.mysql.jdbc.Field@94aa42[catalog=,tableName=C
OLUMNS,originalTableName=,columnName=Extra,originalColumnName=EXTRA,mysqlType=25
3(FIELD_TYPE_VAR_STRING),flags=, charsetIndex=33, charsetName=UTF-8]
[23:06:53.921] {http--8080-0} getFieldTable::EMPTY TABLE::
[23:06:53.921] {http--8080-0} getFieldTable::EMPTY TABLE:-1:
[23:06:53.921] {http--8080-0} fetchFieldDirect()::long_if::
[23:06:53.921] {http--8080-0} fetchFieldDirect()::long_if::EXTRA
 
(0002929)
mo
03-28-08 15:33

 php/144e.qa
 
(0003009)
nam
04-24-08 16:14

 Does not affect:
MySQL JDBC 3.1

Affects:
MySQL JDBC 5.x

Issue:
MySQL JDBC 5.x changed what was returned from a DESCRIBE statement.

Workaround:
use 3.1 until we figure out what to do with 5.x drivers (special case?)
 
(0003014)
omnijared
04-25-08 06:11

 I tried this with MySql JDBC 3.1.14, and resin head from 04/22/08 and I still see the same error. If Quercus is getting the DESCRIBE values returned from JDBC 3.1.x correctly it is not returning it to fetchFieldDirect properly.
 
(0003118)
ferg
05-29-08 17:21

 php/1f56
 

- Issue History
Date Modified Username Field Change
03-20-08 08:41 ferg New Issue
03-20-08 14:27 omnijared Issue Monitored: omnijared
03-24-08 08:40 ferg Note Added: 0002877
03-28-08 15:33 mo Note Added: 0002929
04-24-08 16:14 nam Note Added: 0003009
04-25-08 06:11 omnijared Note Added: 0003014
05-29-08 17:21 ferg Note Added: 0003118
05-29-08 17:21 ferg Assigned To  => ferg
05-29-08 17:21 ferg Status new => closed
05-29-08 17:21 ferg Resolution open => fixed
05-29-08 17:21 ferg Fixed in Version  => 3.2.0

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