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Full Discussion: file is getting overwritten
Top Forums Shell Programming and Scripting file is getting overwritten Post 302446266 by arundhati_s on Wednesday 18th of August 2010 06:37:50 AM
Old 08-18-2010
file is getting overwritten

Hello All,

I am writing a bash script on Solaris O/S. I looping through an array. For each iteration, i connect to the datatabase and use select statement. Output of which is redirected to .CSV file. here is the code for it.
Code:
output="loop.csv"

elements=${#currency_pair[@]}

for((i=0;i<$elements;i++)); do
  echo ${currency_pair[${i}]}
  results=`isql -U$DBLOGIN -P$DBPASSWD -D$DBNAME -b -w 2000 -s',' - o$output <<EOF
 select Code,BidRate,AskRate from FXPoint where RelativeDateType = 1  and
(Code = '${currency_pair[${i}]}')
go
EOF`
done

But the problem is that .CSV file is getting overwritten because, for each iteration of the loop, database connection is getting opened and closed.

How to modify this code to
1) Open the database connection only once.
2) Loop through entire array. Pass the select statement output to the .CSV file
3) close database connection.

Any help is appreciated.

Thanks & Regards
Arundhati

Last edited by jim mcnamara; 08-18-2010 at 07:44 AM.. Reason: code tags please
 

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FPUTCSV(3)								 1								FPUTCSV(3)

fputcsv - Format line as CSV and write to file pointer

SYNOPSIS
int fputcsv (resource $handle, array $fields, [string $delimiter = ","], [string $enclosure = '"'], [string $escape_char = " DESCRIPTION
fputcsv(3) formats a line (passed as a $fields array) as CSV and write it (terminated by a newline) to the specified file $handle. PARAMETERS
o $handle -The file pointer must be valid, and must point to a file successfully opened by fopen(3) or fsockopen(3) (and not yet closed by fclose(3)). o $fields - An array of values. o $delimiter - The optional $delimiter parameter sets the field delimiter (one character only). o $enclosure - The optional $enclosure parameter sets the field enclosure (one character only). o $escape_char - The optional $escape_char parameter sets the escape character (one character only). RETURN VALUES
Returns the length of the written string or FALSE on failure. CHANGELOG
+--------+---------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------+ | 5.5.4 | | | | | | | The $escape_char parameter was added | | | | +--------+---------------------------------------+ EXAMPLES
Example #1 fputcsv(3) example <?php $list = array ( array('aaa', 'bbb', 'ccc', 'dddd'), array('123', '456', '789'), array('"aaa"', '"bbb"') ); $fp = fopen('file.csv', 'w'); foreach ($list as $fields) { fputcsv($fp, $fields); } fclose($fp); ?> The above example will write the following to file.csv: aaa,bbb,ccc,dddd 123,456,789 """aaa""","""bbb""" NOTES
Note If PHP is not properly recognizing the line endings when reading files either on or created by a Macintosh computer, enabling the auto_detect_line_endings run-time configuration option may help resolve the problem. SEE ALSO
fgetcsv(3). PHP Documentation Group FPUTCSV(3)
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