bash read from CSV multiple columns whith hash key - bash

Question

I tried to read verticaly a csv file as follow to insert in graphite/carbon DB.
"No.","time","00:00:00","00:00:01","00:00:02","00:00:03","00:00:04","00:00:05","00:00:06","00:00:07","00:00:08","00:00:09","00:00:0A"
"1","2021/09/12 02:16",235,610,345,997,446,130,129,94,555,274,4
"2","2021/09/12 02:17",364,210,371,341,294,87,179,106,425,262,3
"3","2021/09/12 02:18",297,343,860,216,275,81,73,113,566,274,3
"4","2021/09/12 02:19",305,243,448,262,387,64,63,119,633,249,3
"5","2021/09/12 02:20",276,151,164,263,315,86,92,175,591,291,1
"6","2021/09/12 02:21",264,343,287,542,312,83,72,122,630,273,4
"7","2021/09/12 02:22",373,157,266,446,246,90,173,90,442,273,2
"8","2021/09/12 02:23",265,112,241,307,329,64,71,82,515,260,3
"9","2021/09/12 02:24",285,247,240,372,176,92,67,83,609,620,1
"10","2021/09/12 02:25",289,964,277,476,356,84,74,104,560,294,1
"11","2021/09/12 02:26",279,747,227,573,569,82,77,99,589,229,5
"12","2021/09/12 02:27",338,370,315,439,653,85,165,346,367,281,2
"13","2021/09/12 02:28",269,135,372,262,307,73,86,93,512,283,4
"14","2021/09/12 02:29",281,207,688,322,233,75,69,85,663,276,2
...
I wish to generate commands for each column header 00:00:XX taking into account the hour in column $ 2 and of the value during this time
echo "perf.$type.$serial.$object.00:00:00.TOTAL_IOPS" "235" "epoch time (2021/09/12 02:16)" | nc "localhost" "2004"
echo "perf.$type.$serial.$object.00:00:00.TOTAL_IOPS" "364" "epoch time (2021/09/12 02:17)" | nc "localhost" "2004"
...
echo "perf.$type.$serial.$object.00:00:01.TOTAL_IOPS" "610" "epoch time (2021/09/12 02:16)" | nc "localhost" "2004"
echo "perf.$type.$serial.$object.00:00:01.TOTAL_IOPS" "210" "epoch time (2021/09/12 02:17)" | nc "localhost" "2004"
.. etc..
I dont know by which way to start, i tried with awk without success
Trial1: awk -F "," 'BEGIN{FS=","}NR==1{for(i=1;i<=NF;i++) header[i]=$i}{for(i=1;i<=NF;i++) { print header[i] } }' file.csv
Trial2: awk '{time=$2; for(i=3;i<=NF;i++){time=time" "$i}; print time}' file.csv
Many thanks for any help.

Answer 1

In plain bash:
#!/bin/bash
{
IFS=',' read -ra header
header=("${header[#]//\"}")
nf=${#header[#]}
row_nr=0
while IFS=',' read -ra flds; do
datetime[row_nr++]=$(date -d "${flds[1]//\"}" '+%s')
for ((i = 2; i < nf; ++i)); do
col[i]+=" ${flds[i]}"
done
done
} < file
for ((i = 2; i < nf; ++i)); do
v=(${col[i]})
for ((j = 0; j < row_nr; ++j)); do
printf 'echo "perf.$type.$serial.$object.%s.TOTAL_IOPS" "%s" "epoch time (%s)" | nc "localhost" "2004"\n' \
"${header[i]}" "${v[j]}" "${datetime[j]}"
done
done

Answer 2

Would you please try the following:
awk -F, '
NR==1 { # process the header line
for (i = 3; i <= NF; i++) {
gsub(/"/, "", $i) # remove double quotes
tt[i-2] = $i # assign time array
}
next
}
{ # process the body
gsub(/"/, "", $0)
dt[NR - 1] = $2 # assign datetime array
for (i = 3; i <= NF; i++) {
key[NR-1, i-2] = $i # assign key values
}
}
END {
for (i = 1; i <= NF - 2; i++) {
for (j = 1; j <= NR - 1; j++) {
printf "echo \"perf.$type.$serial.$object.%s.TOTAL_IOPS\" \"%d\" \"epoch time (%s)\" | nc \"localhost\" \"2004\"\n", tt[i], key[j, i], dt[j]
}
}
}
' file.csv