Migrate sample of a MySql table to PostgreSQL using pgloadel tool - mysql

Question

Mission: Migrate data from MySQL to PostgreSQL using pgloader. Pgloader is installed using this guide
Context: I have installed pgloader in the machine where MySQL server exists, and I have also a VM Linux that runs postgres.
The MySQL server is accessed from MySQL Workbench. Apparently, the MySQL user does not have privileges to create tables in that MySQL server.
So what I would like to do is to execute the command below:
pgloader mysql://mysql_username:password#mysql_server_ip_/source_database_name postgresql://postgresql_role_name:password#postgresql_server_ip/target_database_name
and load a sample of the MySQL table to Postgres table like a SQL query:
select *
from source_database_name.table1
where year = 2021
limit 1000;
Is that feasible with pgloader or should I migrate the whole MySQL table which probably is 100gb.
Temporary approach
Load the data using a csv file.
Basically, I executed the SQL query to yield 1000 sample rows from a MySQL table.
Then on the same directory with the csv file I have created a csv_file.load file. The file includes the following commands
LOAD CSV
FROM './csv_file_with_data.csv'
INTO postgresql://<my_user>:<my_pass>#<public_ip>:5432/<db_name>?table1_1000
WITH truncate,
skip header = 1,
fields optionally enclosed by '"',
fields escaped by double-quote,
fields terminated by ','
SET client_encoding to 'latin1',
standard_conforming_strings to 'on'
BEFORE LOAD DO
$$ drop table if exists public.table1_1000; $$,
$$ CREATE TABLE IF NOT EXISTS public.table1_1000(
a varchar(4) DEFAULT NULL,
b varchar(20) DEFAULT NULL,
c varchar(15) DEFAULT NULL,
d int DEFAULT NULL,
...
);
$$;
Executed the file like pgloader csv_file.load