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syntax issue mysql in bash script

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# 1  
Old 04-22-2012
syntax issue mysql in bash script
I'm running mysql in a bash script

mysql <<EOF
query
EOF

one query is like this:
Code:
UPDATE $dbname.$prefix"config" SET  value = $var WHERE  "$prefix"config.name =  'table colname';

with variable
but it's giving an error
i'm not sure what to put for
Code:
"$prefix"config.name


the table name is like
prefix_config
where that is one word
and name is a field name in that table


i'm not sure about the syntax, does anyone know the problem? thanks!
# 2  
Old 04-22-2012
There's no _ in
Code:
$prefix"config"

?

Also, try
Code:
set -x

under
#!/bin/bash

in your script and then run the script manually, you'll see tons of diagnostic "goodies" Smilie
# 3  
Old 04-23-2012
well the prefix contains the _
the prefix is a string like cg_
# 4  
Old 04-23-2012
Why the extra quoting?
Your input to mysql would be for example
Code:
UPDATE db.prefix_"config" SET  value =  WHERE  "prefix_"config.name =  'table colname';

I suppose the problem is getting $prefix to expand correctly, because it will try to expand $prefix_config. try using ${prefix}
Code:
UPDATE $dbname.${prefix}config SET  value = '$var' WHERE  ${prefix}config.name =  'table colname';

This User Gave Thanks to neutronscott For This Post:
vanessafan99
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