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Full Discussion: Advise on how to print range of lines above and below a number?
Top Forums UNIX for Beginners Questions & Answers Advise on how to print range of lines above and below a number? Post 303010190 by newbie_01 on Thursday 28th of December 2017 09:22:28 AM
Old 12-28-2017
Advise on how to print range of lines above and below a number?
Hi,

I have attached an output file which is some kind of database file mapping. It is basically like an allocation mapping of a tablespace and its datafile/s.

The output is generated by the SQL script that I found from 401 Authorization Required

Excerpts of the file are as below:

Code:
Tablespace        File    Block NbBlocks Segment
---------------- ----- -------- -------- ---------------------------------------------------------------------
ABC_XYZXYZ_TXT      18        1      127
                            128      128 TEST.ABCD_MARTIAN_IDX
                            256      128 TEST.ABCD_MARTIAN_IDX
                            384      128
                            512     1024
                           1536      128
                           1664      128
...
...
...
                        3555712    16512
                        3572224     1024
                        3573248    24576
                        3597824     1024
                        3598848   149120

                    43        1      127
                            128      128 TEST.HEY_ARNOLD_FANS
                            256      128 TEST.ABC_BATMAN_ROBIN_N1
                            384      128
                            512        8
                            520        8
                            528        8
...
...
...

I have modified and rename the content but just mainly the segment name, I have put some segment name as an example.

In this example, the tablespace name is ABC_XYZXYZ_TXT and it is composed of two datafiles, file 18 and file 14. I am guessing Block 1 is the file header of each datafile hence the segment column is empty for where it is Block 1.

I'll try my best to explain what I am wanting to do. Before I go write a long script for it, I want to know first if maybe I can 'simply' use awk inside the script to search and print a range of lines above and below a given number.

For example, if I do x.ksh 3000, the script should print out something like below based on what's on testfile.txt.

Code:
ABC_XYZXYZ_TXT      18        1      127
                           2432      128
                           2560      128
                           2688      128
                           2816      128
                           2944      128
                           3072      128
                           3200      128
                           3328      128
                           3456      128
                           3584      128
                           3712      128
                    43        1      127
                           2560      128
                           2688      128
                           2816      128
                           2944      128
                           3072      128
                           3200      128
                           3328      128
                           3456      128
                           3584      128
                           3712      128

At the moment, I am thinking of reading the file one at a time and comparing the third field to the given argument that is 3000. While it seem easy to print the next 5 records > 3000, I can't think of a way of saving the last 5 that are less than 3000?

I am hoping I can get some advice on how to achieve what I am wanting to do.

Any reply much appreciated. Thanks in advance.
testfile.txt (334.4 KB) 
 

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