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Top Forums Shell Programming and Scripting Use of awk and printf - help needed Post 302749521 by LDHB2012 on Friday 28th of December 2012 01:13:07 PM
Old 12-28-2012
Use of awk and printf - help needed

I have a very large file with more than 500,000 lines of dated events.

The first field contains the date/time in the following format:
20120727-files.files:20120727090044

where the first 8 numbers represent yyyymmdd. The last set of numbers represent yyyy/mm/dd/hh:mm:ss

I would like to change the value of the first field to:
YYYY-MM-DD HH:MM:SS

I have no clue how to do this. I started with displaying the first field only to simplify things.

Code:
awk -F"|" '{ print $1 }' infile

I've tried to find a cheatsheet for printf but couldn't find anything good. Is printf universal to many languages? Or is printf in bash unique to all....?

Thanks for reading..

-David
 

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CUBRID_FETCH_FIELD(3)							 1						     CUBRID_FETCH_FIELD(3)

cubrid_fetch_field - Get column information from a result and return as an object

SYNOPSIS
object cubrid_fetch_field (resource $result, [int $field_offset]) DESCRIPTION
This function returns an object with certain properties of the specific column. The properties of the object are: o $name -column name o $table -name of the table that the column belongs to o $def -default value of the column o $max_length -maximum length of the column o $not_null -1 if the column cannot be NULL o $primary_key -1 if the column is a primary key o $unique_key -1 if the column is an unique key o $multiple_key -1 if the column is a non-unique key o $numeric -1 if the column is numeric o $blob -1 if the column is a BLOB o $type -the type of the column o $unsigned -1 if the column is unsigned o $zerofill -1 if the column is zero-filled PARAMETERS
o $result -$result comes from a call to cubrid_execute(3) o $field_offset - The numerical field offset. If the field offset is not specified, the next field (that was not yet retrieved by this function) is retrieved. The $field_offset starts at 0. RETURN VALUES
Object with certain properties of the specific column, when process is successful. FALSE on failure. EXAMPLES
Example #1 cubrid_fetch_field(3) example <?php $conn = cubrid_connect("localhost", 33000, "demodb"); $req = cubrid_execute($conn, "SELECT event_code,athlete_code,nation_code,game_date FROM game WHERE host_year=1988 and event_code=20001;"); var_dump(cubrid_fetch_row($req)); cubrid_field_seek($req, 1); $field = cubrid_fetch_field($req); printf(" --- Field Properties --- "); printf("%-30s %s ", "name:", $field->name); printf("%-30s %s ", "table:", $field->table); printf("%-30s "%s" ", "default value:", $field->def); printf("%-30s %d ", "max length:", $field->max_length); printf("%-30s %d ", "not null:", $field->not_null); printf("%-30s %d ", "primary key:", $field->primary_key); printf("%-30s %d ", "unique key:", $field->unique_key); printf("%-30s %d ", "multiple key:", $field->multiple_key); printf("%-30s %d ", "numeric:", $field->numeric); printf("%-30s %d ", "blob:", $field->blob); printf("%-30s %s ", "type:", $field->type); printf("%-30s %d ", "unsigned:", $field->unsigned); printf("%-30s %d ", "zerofill:", $field->zerofill); cubrid_close_request($req); cubrid_disconnect($conn); ?> The above example will output: array(4) { [0]=> string(5) "20001" [1]=> string(5) "16681" [2]=> string(3) "KOR" [3]=> string(9) "1988-9-30" } --- Field Properties --- name: athlete_code table: game default value: "" max length: 0 not null: 1 primary key: 1 unique key: 1 multiple key: 0 numeric: 1 blob: 0 type: integer unsigned: 0 zerofill: 0 PHP Documentation Group CUBRID_FETCH_FIELD(3)
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