Using Vim, I'm trying to pipe text selected in visual mode to a UNIX command and have the output appended to the end of the current file. For example, say we have a SQL command such as:
SELECT * FROM mytable;
I want to do something like the following:
<ESC>
V " select text
:'<,'>!mysql -uuser -ppass mydb
But instead of having the output overwrite the currently selected text, I would like to have the output appended to the end of the file. You probably see where this is going. I'm working on using Vim as a simple SQL editor. That way, I don't have to leave Vim to edit, tweak, test SQL code.
How about copying the selected text to the end of the file, select the copy and run the command? If you do not want to repeat the same commands over and over again, you can record the sequence by using q or add a new command. I have tried the latter as follows:
:com -range C <line1>,<line2>yank | $ | put | .,$ !rev
With it you can select some lines and then type :C. This will first yank the selection, then go to the end of the file, paste the yanked text and run the command (rev in this case) over the new text.
If you prefer more programmatic approach, you can have
:call append(line("$"), system("command", GetSelectedText()))
where GetSelectedText is the reusable function:
func! GetSelectedText()
normal gv"xy
let result = getreg("x")
normal gv
return result
endfunc
Try
:r | YourCommand
For example:
:r ! echo foo
adds foo to your buffer.
Related
The case is that I have an SQL clause inside a unix script like:
sqlplus -s user/pass << END_SQL1 >> outfile.txt
set echo off feedback off heading off tab off;
select .....
from ....
where ...
and ...
and ... ;
END_SQL
If the outfile.txt is not empty, which means that I get a result from the above SQL, then I am running an update SQL that should change something at some DB elements.
Then I need to reuse the same SQL above to check if the DB elements that I wanted have changed indeed. So, is that possible to reuse this same SQL, but WITHOUT including this same SQL code again later at the script, instead to run it again and, moreover, even put the result at another output file, e.g. outfile2.txt ?
You can use RETURNING ... INTO ... clause inside the script
UPDATE myTable
SET col1 = <something1>
WHERE col2 = <something2>
RETURNING col3, col1 INTO v_col3, v_col1;
to return the results into the variables v_col3 and v_col1.
You could put your hairy SELECT query in a file, say select.sql. Then whenever you need to run the SQL, you could just do :
sqlplus -s user/pass #select.sql >> outfile.txt
You can adapt the output file as you wish :
sqlplus -s user/pass #select.sql >> outfile2.txt
NB : you said
If the outfile.txt is not empty, which means that I get a result from the above SQL
You probably want to use > when writing to outfile.txt : >> appends to the file, while > replaces it.
I am trying to batch rename multiple files and so far I am pretty close to what I am trying to achieve. I have some files called "website.txt", "website1.txt", "website2.txt", "website3.txt" and I am trying to rename only the files that have a number associated with them (so excluding "website.txt"). My first attempt is as follows (I'm using -n for testing):
rename -n 's/website/website_edit/' *txt
Result:
rename(website1.txt, website_edit1.txt)
rename(website2.txt, website_edit2.txt)
rename(website3.txt, website_edit3.txt)
rename(website.txt, website_edit.txt)
As you can see this almost works but it is renaming the "website.txt" file as well which I don't want. So to try and remove it I did this:
rename -n 's/website\w/website_edit/' *txt
Result:
rename(website1.txt, website_edit.txt)
rename(website2.txt, website_edit.txt)
rename(website3.txt, website_edit.txt)
This time it did remove "website.txt" from the list but it also removed the the numbers from the end on the new names. I have also tried messing around with some regular expressions as well but to no avail.
Try this :
rename -n 's/website(\d+)/website_edit$1/' *txt
____ __
^ ^
| |
capturing at least one digit captured group
Actually , i am working on Mysql in linux terminal .
i want a way or a command to save all the queries i write and their outputs in a file .
well, write every query and redirect it to a file is very hard and useless !
if there is any bash script or command it will be helpfull .
yes , tee command can be use for this purpose .
while logging into mysql you can make this redirection like
mysql -u username -pPassword | tee -a outputfilename
your whole session will be stored in the file
This is a bit advanced, but I've just started playing with org-babel, and it's pretty great for SQL.
Set up org-babel in your init.el:
(org-babel-do-load-languages 'org-babel-load-languages
'((sql . t)))
(setq org-confirm-babel-evaluate nil
org-src-fontify-natively t
org-src-tab-acts-natively t)
And create an org-mode buffer. You can just run M-x org-mode in *scratch* if you want.
Then write your SQL:
#+BEGIN_SRC sql :engine "mysql" :dbhost "db.example.com" :dbuser "jqhacker" :dbpassword "passw0rd" :database "the_db"
show tables
select * from the_table limit 10
#+END_SRC
Evaluate it by putting the cursor in the SQL block and type C-c C-c. The results show up in the buffer. You can write as many source blocks as you like, and evaluate them in any order.
There's a lot more to org-babel: http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-sql.html
i just founded that there is an sql command to save query and output in a file ;
mysql> tee filename ;
example :
mysql> tee tmp/output.out;
..logging to file 'tmp/output.out'
now : every query and his output will be saved in a output.out file.
note : " remember to write file name without quotes"
I want to save the output of a program to a variable.
I use the following approach ,but fail.
$ PIPE RUN TEST | DEFINE/JOB VALUE #SYS$PIPE
$ x = f$logical("VALUE")
I got an error:%DCL-W-MAXPARM, too many parameters - reenter command with fewer parameters
\WORLD\
reference :
How to assign the output of a program to a variable in a DCL com script on VMS?
The usual way to do this is to write the output to a file and read from the file and put that into a DCL symbol (or logical). Although not obvious, you can do this with the PIPE command was well:
$ pipe r 2words
hello world
$ pipe r 2words |(read sys$pipe line ; line=""""+line+"""" ; def/job value &line )
$ sh log value
"VALUE" = "hello world" (LNM$JOB_85AB4440)
$
IF you are able to change the program, add some code to it to write the required values into symbols or logicals (see LIB$ routines)
If you can modify the program, using LIB$SET_SYMBOL in the program defines a DCL symbol (what you are calling a variable) for DCL. That's the cleanest way to do this. If it really needs to be a logical, then there are system calls that define logicals.
I'm trying to load a sql from a file in bash and execute the loaded sql. The sql file needs to be versatile, meaning it cannot be altered in order to make things easy while being run in bash (escaping special characters like * )
So I have run into some problems:
If I read my sample.sql
SELECT * FROM SAMPLETABLE
to a variable with
ab=`cat sample.sql`
and execute it
db2 `echo $ab`
I receive an sql error because by doing a cat the * has been replaced by all the files in the directory of sample.sql.
Easy solution would be to replace "" with "\" . But I cannot do this, because the file needs to stay executable in programs like DB Visualizer etc.
Could someone give me hint in the right direction?
The DB2 command line processor has options that accept a filename as input, so you shouldn't need to load statements from a text file into a shell variable.
This command will execute all SQL statements in the file, with newline treated as the statement terminator:
db2 -f sample.sql
This command will execute all SQL statements in the file, with semicolon treated as the statement terminator:
db2 -t -f sample.sql
Other useful CLP flags are:
-x : Suppress the column headings
-v : Echo the statement text immediately before execution
-z : Tee a copy of all CLP output to the filename immediately following this flag
Redirect stdin from the file.
db2 < sample.sql
In case, you have a variable used in your script and wanted to get it replaced by the shell before executed in DB2 then use this approach:
Contents of File.sql:
cat <<xEOF
insert values(1,2) into ${MY_SCHEMA}.${MY_TABLE};
select * from ${MY_SCHEMA}.${MY_TABLE};
xEOF
In command prompt do:
export MY_SCHEMA='STAR'
export MY_TAVLE='DIMENSION'
Then you are all good to get it executed in DB2:
eval File.sq |db2 +p -t
The shell will replace the global variables and then DB2 will execute it.
Hope it helps.