Dump Postgres one table script

pg_dump_custom.sh

#!/bin/bash
set -e
set -o pipefail

# https://gist.github.com/kilfu0701/2f545f7f1a8a9d0bd923be8d38028817
function echo_c()
{
    WHITE='\033[1;37m'
    RED='\033[1;31m'
    GREEN='\033[1;32m'
    YELLOW='\033[1;33m'
    BLUE='\033[1;34m'
    PURPLE='\033[1;35m'
    CYAN='\033[1;36m'
    NC='\033[0m'
    str=$1 && color=$2
    printf "${!color}$str$NC\n"
}
function echo_done()
{
    echo_c "  Done!" "WHITE"
    echo ""
}

# check to see if this file is being run or sourced from another script
_is_sourced() {
	# https://unix.stackexchange.com/a/215279
	[ "${#FUNCNAME[@]}" -ge 2 ] \
		&& [ "${FUNCNAME[0]}" = '_is_sourced' ] \
		&& [ "${FUNCNAME[1]}" = 'source' ]
}

_send_notification() {
	local msg=$1
	curl -X POST -H "Content-Type:application/json" -d "{\"text\": \"$1\"}" 'https://chat.googleapis.com/v1/spaces/XXXX/messages?key=YYYYYY&token=ZZZZZ'
}

_dump_process() {
	local dbName=$1
	local tableName=$2

	start=`date +%s%3N`

	echo_c "[_dump_process] Start DB=$dbName TABLE=$tableName" "CYAN"
	mkdir -p /tmp/$tableName
	PGPASSWORD=postgres pg_dump -h 0.0.0.0 -U postgres -Z0 -j 64 --data-only -Fd --table=$tableName $dbName -f "/tmp/$tableName"
	echo_c "[_dump_process] Dump finished" "WHITE"

	end=`date +%s%3N`
	runtime=$( echo "$end - $start")

	hours=$((runtime / 3600 / 1000))
	minutes=$(( (runtime/1000 % 3600) / 60 ))
	seconds=$(( (runtime/1000 % 3600) % 60 ))
	ms=$((runtime % 1000))

	#_send_notification "Dump finished. (DB=$dbName, TABLE=$tableName) \nRuntime: $hours:$minutes:$seconds.$ms sec."
}

_main() {
	if [ $# -eq 2 ]
	then
    		_dump_process $1 $2
	else
		echo_c "invalid argument please pass 2 argument." "RED"
		exit 1
	fi
}

if ! _is_sourced; then
	_main "$@"
fi

Usage

./pg_dump_custom-sh DBName public.TableName