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Top Forums Shell Programming and Scripting Taking information from a postgres sql query and putting it into a shell script array Post 302900134 by JSNY on Monday 5th of May 2014 01:52:55 AM
Old 05-05-2014
Taking information from a postgres sql query and putting it into a shell script array

I have a postgres sql statement that is the following:

select age from students;

which gives me the entries:

Code:
Age
---
10
15
13
12
9
14
10

which is about 7 rows of data.

Now what I would like to do with this is use a shell script to create an array age[]. As a results age[1]=10, age[2]=15, age[3]=13, age [4]=12, age[5]=9, age[6]=14, age[7]=10.

Any ideas on how to create a shell script.

I have been able to do the following:

Code:
Unix_Array=$(psql -h $PSQL_HOST $PSQL_RDB $PSQL_USER << EOFF
BEGIN TRANSACTION;
select age from students;
END TRANSACTION;
\q
EOFF
)
echo $Unix_Array

Unix_Array gives me all the ages at once like this:
Code:
10
15
13
12
9
14
10


but I cannot for example parse Unix_Array into individual variables such Unix_Array[1]=10, Unix[2]=15 and so on like I described above. Any ideas?

Thanks,

Jason


Last edited by Scrutinizer; 05-05-2014 at 07:04 AM.. Reason: code tags
 

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DB2_NUM_FIELDS(3)							 1							 DB2_NUM_FIELDS(3)

db2_num_fields - Returns the number of fields contained in a result set

SYNOPSIS
int db2_num_fields (resource $stmt) DESCRIPTION
Returns the number of fields contained in a result set. This is most useful for handling the result sets returned by dynamically generated queries, or for result sets returned by stored procedures, where your application cannot otherwise know how to retrieve and use the results. PARAMETERS
o $stmt - A valid statement resource containing a result set. RETURN VALUES
Returns an integer value representing the number of fields in the result set associated with the specified statement resource. Returns FALSE if the statement resource is not a valid input value. EXAMPLES
Example #1 Retrieving the number of fields in a result set The following example demonstrates how to retrieve the number of fields returned in a result set. <?php $sql = "SELECT id, name, breed, weight FROM animals ORDER BY breed"; $stmt = db2_prepare($conn, $sql); db2_execute($stmt, $sql); $columns = db2_num_fields($stmt); echo "There are {$columns} columns in the result set."; ?> The above example will output: There are 4 columns in the result set. SEE ALSO
db2_execute(3), db2_field_display_size(3), db2_field_name(3), db2_field_num(3), db2_field_precision(3), db2_field_scale(3), db2_field_type(3), db2_field_width(3). PHP Documentation Group DB2_NUM_FIELDS(3)
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