unix parse values from key-value pairs and print nested results - bash

Question

I managed to parse a custom yaml using below script from How can I parse a YAML file from a Linux shell script? by Stefan:
function parse_yaml {
local prefix=$2
local s='[[:space:]]*' w='[a-zA-Z0-9_]*' fs=$(echo #|tr # '\034')
sed -ne "s|^\($s\):|\1|" \
-e "s|^\($s\)\($w\)$s:$s[\"']\(.*\)[\"']$s\$|\1$fs\2$fs\3|p" \
-e "s|^\($s\)\($w\)$s:$s\(.*\)$s\$|\1$fs\2$fs\3|p" $1 |
awk -F$fs '{
indent = length($1)/2;
vname[indent] = $2;
for (i in vname) {if (i > indent) {delete vname[i]}}
if (length($3) > 0) {
vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")}
printf("%s%s%s=\"%s\"\n", "'$prefix'",vn, $2, $3);
}
}'
}
Output:
$ parse_yaml new_export.yaml
schemas_name="exports"
schemas_tables_name="TEST1"
schemas_tables_description="'"Tracks analysis"
schemas_tables_active_date="2019-01-07 00:00:00"
schemas_tables_columns_name="event_create_ts"
schemas_tables_columns_type="timestamp without time zone"
schemas_tables_columns_name="issue_id"
schemas_tables_columns_type="bigint"
schemas_tables_columns_description="conv id"
schemas_tables_columns_example="21352352"
schemas_tables_columns_name="company_id"
schemas_tables_columns_type="bigint"
schemas_tables_columns_description="'"Tracks analysis"
schemas_tables_columns_example="10001"
schemas_tables_name="TEST2"
schemas_tables_description="This table presents funny encounters"
schemas_tables_active_date="2018-12-18 00:00:00"
schemas_tables_columns_name="instance_ts"
schemas_tables_columns_type="datetime"
schemas_tables_columns_description="|-"
schemas_tables_columns_example="2018-03-03 12:30:00"
schemas_tables_columns_name="address_id"
schemas_tables_columns_type="bigint"
How can I generate a csv file out of it using nested hierarchy for each table and its colum etc based on the Keys ?
Something like below:
exports.TEST1.event_create_ts,"timestamp without time zone"
exports.TEST1.issue_id,bigint,"conv id",21352352
exports.TEST1.company_id,bigint,"'"Tracks analysis",10001
exports.TEST2.instance_ts,datetime,"|-","2018-03-03 12:30:00"
exports.TEST2.address_id,bigint
Any help would be appreciated!