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from datetime import datetime
import polars as pl
from polars_queries import utils
Q_NUM = 9
def q():
part_ds = utils.get_part_ds()
supplier_ds = utils.get_supplier_ds()
line_item_ds = utils.get_line_item_ds()
part_supp_ds = utils.get_part_supp_ds()
orders_ds = utils.get_orders_ds()
nation_ds = utils.get_nation_ds()
q_final = (
line_item_ds.join(supplier_ds, left_on="l_suppkey", right_on="s_suppkey")
.join(
part_supp_ds,
left_on=["l_suppkey", "l_partkey"],
right_on=["ps_suppkey", "ps_partkey"],
)
.join(part_ds, left_on="l_partkey", right_on="p_partkey")
.join(orders_ds, left_on="l_orderkey", right_on="o_orderkey")
.join(nation_ds, left_on="s_nationkey", right_on="n_nationkey")
.filter(pl.col("p_name").str.contains("green"))
.select(
[
pl.col("n_name").alias("nation"),
pl.col("o_orderdate").dt.year().alias("o_year"),
(
pl.col("l_extendedprice") * (1 - pl.col("l_discount"))
- pl.col("ps_supplycost") * pl.col("l_quantity")
).alias("amount"),
]
)
.group_by(["nation", "o_year"])
.agg(pl.sum("amount").round(2).alias("sum_profit"))
.sort(by=["nation", "o_year"], descending=[False, True])
)
utils.run_query(Q_NUM, q_final)
if __name__ == "__main__":
q()
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