grep entire text based on key words - unix

Question

i have a file consists of oracle select statements as given below.
select count(*) into v_cnt from table;
select
max(num) into v_max
from table2;
select numm from table3;
output is given below -
select count(*) into v_cnt from table;
select
max(num) into v_max
from table2;
i need help on grepping the select statements(from select keyword till semicolon) which has into key word. select statements may goes n number of rows. begining of line is select. ending of line is semicolon. in between these keywords if we have into text. then we need to capture the whole line. i am trying grep/awk statement. but i am not getting exaclty. multiple line select statements are breaking. Any ideas/suggestions from your end. Thanks in advance.

Answer 1

Perl to the rescue!
perl -0x3b -ne 'print if /\binto\b/'
-0x3b sets the record separator to character x3b, i.e. ;
-n reads the input record by record, running the code for each
\b matches a word boundary, so all records containing "into" that's not part of a longer word should be printed
If there are some commands that don't start with select and you want to skip them, change the condition to if /^select\b/m && /\binto\b/ (which can be incorporated into a single regex if /^select\b.*\binto\b/ms). To make the regexes case insensitive, add the /i modifier: /^select\b/mi.

Answer 2

Try this:
tr '\n' '~' < <Input file> | sed 's#;#\n#g' | grep -i 'select.*into.*' | tr '~' '\n'
Demo:
$cat file.txt
select count(*) into v_cnt from table;
select
max(num) into v_max
from table2;
select numm from table3;
$tr '\n' '~' < file.txt | sed 's#;#\n#g' | grep -i 'select.*into.*' | tr '~' '\n'
select count(*) into v_cnt from table
select
max(num) into v_max
from table2
$

Answer 3

With GNU awk for multi-char RS:
$ awk 'BEGIN{RS=ORS=";\n"} /into/' file
select count(*) into v_cnt from table;
select
max(num) into v_max
from table2;
With any awk:
$ awk -v RS=';' -v ORS=';\n' '/into/{sub(/^\n/,""); print}' file
select count(*) into v_cnt from table;
select
max(num) into v_max
from table2;

Answer 4

awk: issel remembers whether select lacked a ;:
{
if (issel = (issel || $0 ~ /select/)) print $0;
issel = !( $0 ~ /;/)
}