06-14-2005
Quote:
Originally Posted by yongho
Question: I just started learning shell scripting a few days ago and I was under the assumption that you didn't need to typeset anything.
you don't.
if you
don't,
count=$((count + 1))
becomes
count=$((
$count + 1))
Quote:
Originally Posted by yongho
One of my previous counters looked like this (in a while statement, not an if statement:
var1=`expr $var1 + $var2`
..and it worked.
this
NOT using ksh/bash
builtin capabilities for doing simple integer math.
Quote:
Originally Posted by yongho
But when I tried the expr command in the if statement, it didn't increment at all. Would you know why this is? Could it be because once you enter an if statement, you must use different rules?
nope, that's not it.
are you saying that the 'expr ' increment
did not work, but the 'count=$((count+1))'
did?
there must be something else different in your 'while' loop.
is your 'while' loopbeing
piped with data?
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MOVE(7) PostgreSQL 9.2.7 Documentation MOVE(7)
NAME
MOVE - position a cursor
SYNOPSIS
MOVE [ direction [ FROM | IN ] ] cursor_name
where direction can be empty or one of:
NEXT
PRIOR
FIRST
LAST
ABSOLUTE count
RELATIVE count
count
ALL
FORWARD
FORWARD count
FORWARD ALL
BACKWARD
BACKWARD count
BACKWARD ALL
DESCRIPTION
MOVE repositions a cursor without retrieving any data. MOVE works exactly like the FETCH command, except it only positions the cursor and
does not return rows.
The parameters for the MOVE command are identical to those of the FETCH command; refer to FETCH(7) for details on syntax and usage.
OUTPUTS
On successful completion, a MOVE command returns a command tag of the form
MOVE count
The count is the number of rows that a FETCH command with the same parameters would have returned (possibly zero).
EXAMPLES
BEGIN WORK;
DECLARE liahona CURSOR FOR SELECT * FROM films;
-- Skip the first 5 rows:
MOVE FORWARD 5 IN liahona;
MOVE 5
-- Fetch the 6th row from the cursor liahona:
FETCH 1 FROM liahona;
code | title | did | date_prod | kind | len
-------+--------+-----+------------+--------+-------
P_303 | 48 Hrs | 103 | 1982-10-22 | Action | 01:37
(1 row)
-- Close the cursor liahona and end the transaction:
CLOSE liahona;
COMMIT WORK;
COMPATIBILITY
There is no MOVE statement in the SQL standard.
SEE ALSO
CLOSE(7), DECLARE(7), FETCH(7)
PostgreSQL 9.2.7 2014-02-17 MOVE(7)