sh: can't return one result after comparing 2 files - sh

Question

as an example I will put different inputs to keep the privacy of my files and to avoid long text, these are of the following form :
INPUT1.cfg :
TC # aa # D317
TC # bb # D314
TC # cc # D315
TC # dd # D316
INPUT2.cfg
BL;nn;3
LY;ww;3
LO;xx;3
TC;vv;3
TC;dd;3
OD;pp;3
TC;aa;3
what I want to do is iterate the name (column 2) in the rows of input1 and compare with the name (column 2) in the rows of input2; if they match we will get the line of INPUT2 in an output file otherwise it will return that the table is not found, here is my try code:
#!/bin/bash
input1="input1.cfg";
input2="input2.cfg"
cat $input1|while read line
do
TableNameIN=`echo $line|cut -d"#" -f2`
cat $input2| while read line
do
TableNameOUT=`echo $line|cut -d";" -f2`
if echo "$TableNameOUT" | grep -q $TableNameIN;
then echo "$line" >> output.txt
else
echo "Table $TableNameIN non trouvé"
fi
done
done
this what i get as result :
Table bb not found
Table bb not found
Table bb not found
Table cc not found
Table cc not found
Table cc not found
I manage to write what is equal but the problem with my code is that it has in output "table not found" for each row whereas I just want to write only once at the end of the comparison of all the lines
here is the output i want to get :
Table bb not found
Table cc not found
Can any one help me with this , PS : I don't want to use awk because it's just a part of my code and i already use sh

Answer 1

Assumptions:
for file input2.cfg the 2nd column (table name) is unique
input2.cfg is not so large that we run the risk of using up all memory for storing intput2.cfg in an associative array (otherwise we could store the table names from input1.cfg's - assuming this is a smaller file - in the array and swap the processing order of the two files)
there are no explicit requirements for data to be sorted (otherwise we may need to add a sort or two)
a bash solution is sufficient (based on inclusion of the #!/bin/bash shebang in OPs current code)
There are many ways to slice-n-dice this one (awk being my preference but OP doesn't want to use awk). For this particular answer I'll pull the awk steps out into separate bash commands.
NOTE: While we could use a set of nested loops (as in the OPs code), I've opted to use an associative array to store input2.cfg thus eliminating the need to repeatedly scan input2.cfg.
#!/usr/bin/bash
input1=input1.cfg
input2=input2.cfg
> output.txt # clear out the target file
# load ${input2} into an associative array
unset lines
typeset -A lines # associative array for storing contents of ${input2}
while read -r line
do
x="${line%;*}" # use parameter expansion
tabname="${x#*;}" # to parse out table name
lines["${tabname}"]="${line}" # add to array
done < "${input2}"
# process ${input1}
while read -r c1 c2 tabname rest_of_line
do
[[ -v lines["${tabname}"] ]] && # if tabname has an entry in our array
echo "${lines[${tabname}]}" >> output.txt && # then dump the associated line (from ${input2}) to output.txt
continue # process next line from ${input1}
echo "Table ${tabname} not found" # otherwise print 'not found' message
done < "${input1}"
# display contents of output.txt
echo "++++++++++++++++ output.txt"
cat output.txt
echo "++++++++++++++++"
This generates the following:
Table bb not found
Table cc not found
++++++++++++++++ output.txt
TC;aa;3
TC;dd;3
++++++++++++++++