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Top Forums Shell Programming and Scripting Awk command to replace specific position characters. Post 302594630 by pinnacle on Tuesday 31st of January 2012 09:22:06 PM
Old 01-31-2012
Thanks Chubler_XL. This works.
Sir could you please explain what we are doing in this.
I understand that we defined a function called "repl" which takes four parameters.
And then calling it 3 times.
I dont understand the following:
Quote:

sprintf("%-*s", t-f+1, v) substr(s,t+1) ---> What does this part does

we are storing all the return values in "a" and printing it. So will the values not get overwritten.
a=repl($0,96,98,"ABC")
a=repl(a,99,113,"DEF")
a=repl(a,190,198,"XYZ")
print a
And also when we are replacing characters from 99 to 113 with "DEF" without trailing spaces. How does it not mess the format.

Would really appreciate if you could explain this to me.
 

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PG_FIELD_SIZE(3)														  PG_FIELD_SIZE(3)

pg_field_size - Returns the internal storage size of the named field

SYNOPSIS
int pg_field_size (resource $result, int $field_number) DESCRIPTION
pg_field_size(3) returns the internal storage size (in bytes) of the field number in the given PostgreSQL $result. Note This function used to be called pg_fieldsize(3). PARAMETERS
o $result - PostgreSQL query result resource, returned by pg_query(3), pg_query_params(3) or pg_execute(3) (among others). o $field_number - Field number, starting from 0. RETURN VALUES
The internal field storage size (in bytes). -1 indicates a variable length field. FALSE is returned on error. EXAMPLES
Example #1 Getting information about fields <?php $dbconn = pg_connect("dbname=publisher") or die("Could not connect"); $res = pg_query($dbconn, "select * from authors where author = 'Orwell'"); $i = pg_num_fields($res); for ($j = 0; $j < $i; $j++) { echo "column $j "; $fieldname = pg_field_name($res, $j); echo "fieldname: $fieldname "; echo "printed length: " . pg_field_prtlen($res, $fieldname) . " characters "; echo "storage length: " . pg_field_size($res, $j) . " bytes "; echo "field type: " . pg_field_type($res, $j) . " "; } ?> The above example will output: column 0 fieldname: author printed length: 6 characters storage length: -1 bytes field type: varchar column 1 fieldname: year printed length: 4 characters storage length: 2 bytes field type: int2 column 2 fieldname: title printed length: 24 characters storage length: -1 bytes field type: varchar SEE ALSO
pg_field_prtlen(3), pg_field_type(3). PHP Documentation Group PG_FIELD_SIZE(3)
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