Women in Technology

Article:		Relational Modeling of Biological Data: Trees and Graphs
Subject:		fetch() without execute() error in Example 1
Date:		2003-06-15 11:49:37
From:		anonymous2
Response to: fetch() without execute() error in Example 1
Aaron generously offered a solution via email: In the script, replace the following line: while(my ($id) = $children->fetchrow_array) { With this: for my $row (@{$children->fetchall_arrayref}) { my ($id) = @$row; Thanks, Aaron!

Showing messages 1 through 2 of 2.

• fetch() without execute() error in Example 1
  2004-01-11 11:31:44  anonymous2 [View]
  
  
  It took several days(more than a week) on a pentium-4 freebsd machine to run this code for entire ncbi taxonomy. Is there anything I should check with my MySql or table structure? I have indexed the taxon_id and the parent_id.
• fetch() without execute() error in Example 1
  2006-02-06 10:55:01  Aaron Mackey | [View]
  
  
  The $children statement needs an additional clause, as follows:
  
  
my $children = $dbh->prepare("SELECT id
FROM taxon
WHERE parent_id = ?
AND id <> parent_id");