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Full Discussion: Loop in bash file for mysql
Top Forums Programming Loop in bash file for mysql Post 302764329 by JohnGraham on Thursday 31st of January 2013 09:47:43 AM
Old 01-31-2013
Okay, you first need to assess whether or not the mysql query went OK or not. Either "set -e" at the start of the script or deal with it when you run the query.

My MySQL is rusty but I checked and you can't run queries by just appending the query string - I get errors (which end up in my variable) when I do that. In stead, do something like:

Code:
result1=$($mysqlExec --skip-column-names -B $database <<< "$query1")

Then instead of checking for the number of results, check if the string is empty.

You might also want to do a MySQL count statement (as opposed to a query) which may also be much better if the database is large. Additionally, when I do queries like that all my results end up on one line - you might want to append "limit 1" to your query to get just one result.

Hope this helps.
 

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BP_META_GFF(1p) 					User Contributed Perl Documentation					   BP_META_GFF(1p)

NAME
bp_meta_gff.pl - Get/set Bio::DB::GFF meta-data SYNOPSIS
# set the following meta data values % bp_meta_gff.pl -d testdb tag1=value1 tag2=value2 # get the indicated meta data value % bp_meta_gff.pl -d testdb tag1 tag2 DESCRIPTION
This script gets or sets metadata in a Bio::DB::GFF database. Not all adaptors support this operation! To set a series of tags, pass a set of tag=value pairs to the script. To get the contents of a series of tags, pass the bare tag names. The output from the get operation will be an easily parseable set of tag=value pairs, one per line. COMMAND-LINE OPTIONS Command-line options can be abbreviated to single-letter options. e.g. -d instead of --database. --database <dsn> Mysql database name (default dbi:mysql:test) --adaptor <adaptor> Mysql adaptor (default dbi::mysqlopt) --user <user> Username for mysql authentication --pass <password> Password for mysql authentication SEE ALSO
Bio::DB::GFF AUTHOR
Lincoln Stein, lstein@cshl.org Copyright (c) 2002 Cold Spring Harbor Laboratory This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See DISCLAIMER.txt for disclaimers of warranty. perl v5.14.2 2012-03-02 BP_META_GFF(1p)
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