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Top Forums Shell Programming and Scripting get part of file with unique & non-unique string Post 302354245 by durden_tyler on Thursday 17th of September 2009 02:32:27 PM
Old 09-17-2009
Quote:
Originally Posted by andrewsc
... However, on the first page I actually need to start 5 lines above the "123456" (6 including that line).
So in case of file f1, you want to start from line (7-5=) 2:

Code:
$
$ cat -n f1
     1  456789
     2  stm1 - line 1
     3  stm1 - line 2
     4  stm1 - line 3
     5  ENDSTM
     6
     7  123456
     8  stm2 - line 1
     9  stm2 - line 2
    10  stm2 - line 3
    11  stm2 - line 4
    12  ENDSTM
    13
    14  345678
    15  stm3 - line 1
    16  stm3 - line 2
    17  ENDSTM
    18
    19  567890
    20  stm4 - line 1
    21  stm4 - line 2
    22  stm4 - line 3
    23  stm4 - line 4
    24  ENDSTM
    25
$
$
$ ##
$ perl -ne 'BEGIN{undef $/} {/.*\n(([^\n]*\n){5}123456.*?)ENDSTM/s && print $1}' f1
stm1 - line 1
stm1 - line 2
stm1 - line 3
ENDSTM
 
123456
stm2 - line 1
stm2 - line 2
stm2 - line 3
stm2 - line 4
$
$

tyler_durden
 

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EXECUTE(7)                                                         SQL Commands                                                         EXECUTE(7)

NAME
EXECUTE - execute a prepared statement SYNOPSIS
EXECUTE name [ ( parameter [, ...] ) ] DESCRIPTION
EXECUTE is used to execute a previously prepared statement. Since prepared statements only exist for the duration of a session, the pre- pared statement must have been created by a PREPARE statement executed earlier in the current session. If the PREPARE statement that created the statement specified some parameters, a compatible set of parameters must be passed to the EXECUTE statement, or else an error is raised. Note that (unlike functions) prepared statements are not overloaded based on the type or number of their parameters; the name of a prepared statement must be unique within a database session. For more information on the creation and usage of prepared statements, see PREPARE [prepare(7)]. PARAMETERS
name The name of the prepared statement to execute. parameter The actual value of a parameter to the prepared statement. This must be an expression yielding a value that is compatible with the data type of this parameter, as was determined when the prepared statement was created. OUTPUTS
The command tag returned by EXECUTE is that of the prepared statement, and not EXECUTE. EXAMPLES
Examples are given in the Examples [prepare(7)] section of the PREPARE [prepare(7)] documentation. COMPATIBILITY
The SQL standard includes an EXECUTE statement, but it is only for use in embedded SQL. This version of the EXECUTE statement also uses a somewhat different syntax. SEE ALSO
DEALLOCATE [deallocate(7)], PREPARE [prepare(7)] SQL - Language Statements 2010-05-14 EXECUTE(7)

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