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Top Forums Shell Programming and Scripting Using awk and grep for sql generation Post 302983825 by wahi80 on Monday 17th of October 2016 03:24:46 PM
Old 10-17-2016
Using awk and grep for sql generation

Hi,

I have a file pk.txt which has table related data in following format


Code:
TableName | PK
Employee | id
Contact|name,phone,country

I have another file desc.txt which lists datatype of each field like this:
Code:
Table|Field|Type
Employee|id|int
Contact|name|string
Contact|country|string
Contact|phone|bigint

My Output should be

Code:
Employee | t1.id=s.id
Contact| TRIM(t1.name)=TRIM(s.name) AND t1.phone=t2.phone AND TRIM(t1.country)=TRIM(s.country)

Note: TRIM should be applied only to string fields

I'm able to get the output without the TRIMs by using code below, not sure how to incorporate the TRIM logic.

Code:
awk -F "[ |]*" '
NR>1{
  printf $1 "|" $2 "|"
  flds=split($2, F, ",")
  for(i=0;i<flds;i++)
     printf "%s%s.%s=%s.%s", i?" AND ":"", S, F[i+1], D, F[i+1]
  printf "\n"
}' S=t1 D=t2  pk.txt

I'm guessing I have to grep each fld element and check if it is string, but Im unable to tie the whole output in one line.

Thanks


Moderator's Comments:
Mod Comment Please don't modify posts after people have answered referencing it, pulling the rug from under their feet!

Last edited by RudiC; 10-18-2016 at 05:24 AM.. Reason: Wrong code pasted
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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