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test_snowflake_merge_func.py
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test_snowflake_merge_func.py
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import os
import unittest
from astro.databases import create_database
from astro.databases.snowflake import SnowflakeDatabase, is_valid_snow_identifier
from astro.table import Metadata, Table
from ..operators import utils as test_utils
class TestSnowflakeMerge(unittest.TestCase):
def setUp(self):
self.target_table_name = test_utils.get_table_name("merge_test_1")
self.target_table = Table(
name=self.target_table_name,
metadata=Metadata(
database=os.getenv("SNOWFLAKE_DATABASE"),
schema=os.getenv("SNOWFLAKE_SCHEMA"),
),
conn_id="snowflake_conn",
)
self.source_table_name = test_utils.get_table_name("merge_test_2")
self.source_table = Table(
name=self.source_table_name,
metadata=Metadata(
database=os.getenv("SNOWFLAKE_DATABASE"),
schema=os.getenv("SNOWFLAKE_SCHEMA"),
),
conn_id="snowflake_conn",
)
self.snowflake_db: SnowflakeDatabase = create_database(conn_id="snowflake_conn")
self.target_table_full_name = self.snowflake_db.get_table_qualified_name(self.target_table)
self.source_table_full_name = self.snowflake_db.get_table_qualified_name(self.source_table)
def test_merge_func(self):
sql, parameters = self.snowflake_db._build_merge_sql(
if_conflicts="update",
source_table=self.source_table,
target_table=self.target_table,
source_to_target_columns_map={"sell": "sell"},
target_conflict_columns=["sell"],
)
assert (
sql == "merge into IDENTIFIER(:target_table) using IDENTIFIER(:source_table) "
"on Identifier(:merge_clause_target_0)=Identifier(:merge_clause_source_0) "
f"when matched then UPDATE SET {self.target_table_name}.sell={self.source_table_name}.sell "
f"when not matched then insert({self.target_table_name}.sell) values ({self.source_table_name}.sell)"
)
assert parameters == {
"merge_clause_target_0": f"{self.target_table_name}.sell",
"merge_clause_source_0": f"{self.source_table_name}.sell",
"target_table": self.target_table_full_name,
"source_table": self.source_table_full_name,
}
def test_merge_func_multiple_clause(self):
sql, parameters = self.snowflake_db._build_merge_sql(
source_table=self.source_table,
target_table=self.target_table,
source_to_target_columns_map={
"list": "list",
"sell": "sell",
"age": "taxes",
},
target_conflict_columns=["list", "sell"],
if_conflicts="update",
)
assert (
sql == "merge into IDENTIFIER(:target_table) using IDENTIFIER(:source_table) "
"on Identifier(:merge_clause_target_0)=Identifier(:merge_clause_source_0) AND "
"Identifier(:merge_clause_target_1)=Identifier(:merge_clause_source_1) "
f"when matched then UPDATE SET {self.target_table_name}.list={self.source_table_name}.list,"
f"{self.target_table_name}.sell={self.source_table_name}.sell,"
f"{self.target_table_name}.taxes={self.source_table_name}.age "
f"when not matched then "
f"insert({self.target_table_name}.list,{self.target_table_name}.sell,{self.target_table_name}.taxes) "
f"values ({self.source_table_name}.list,{self.source_table_name}.sell,{self.source_table_name}.age)"
)
assert parameters == {
"merge_clause_source_0": f"{self.source_table_name}.list",
"merge_clause_source_1": f"{self.source_table_name}.sell",
"merge_clause_target_0": f"{self.target_table_name}.list",
"merge_clause_target_1": f"{self.target_table_name}.sell",
"target_table": self.target_table_full_name,
"source_table": self.source_table_full_name,
}
def test_merge_fun_ignore_with_lower_case(self):
sql, parameters = self.snowflake_db._build_merge_sql(
source_table=self.source_table,
target_table=self.target_table,
source_to_target_columns_map={"sell": "sell"},
target_conflict_columns=["sell"],
if_conflicts="ignore",
)
assert (
sql == "merge into IDENTIFIER(:target_table) using IDENTIFIER(:source_table) "
"on Identifier(:merge_clause_target_0)=Identifier(:merge_clause_source_0) "
f"when not matched then insert({self.target_table_name}.sell) values ({self.source_table_name}.sell)"
)
assert parameters == {
"merge_clause_target_0": f"{self.target_table_name}.sell",
"merge_clause_source_0": f"{self.source_table_name}.sell",
"target_table": self.target_table_full_name,
"source_table": self.source_table_full_name,
}
def test_merge_fun_ignore_with_mixed_case(self):
sql, parameters = self.snowflake_db._build_merge_sql(
source_table=self.source_table,
target_table=self.target_table,
source_to_target_columns_map={"Sell": "Sell"},
target_conflict_columns=["Sell"],
if_conflicts="ignore",
)
assert (
sql == "merge into IDENTIFIER(:target_table) using IDENTIFIER(:source_table) "
"on Identifier(:merge_clause_target_0)=Identifier(:merge_clause_source_0) "
f'when not matched then insert({self.target_table_name}."Sell") values ({self.source_table_name}."Sell")'
)
assert parameters == {
"merge_clause_target_0": f'{self.target_table_name}."Sell"',
"merge_clause_source_0": f'{self.source_table_name}."Sell"',
"target_table": self.target_table_full_name,
"source_table": self.source_table_full_name,
}
def test_is_valid_snow_identifier(self): # skipcq PYL-R0201
valid_strings = [
"ValidName",
"Valid_Name",
'"$valid"',
'"Valid Name"',
'"Valid With ""Quotes"""',
'"\x00 Valid with ""Quotes"" #$@(TSDGfsd"',
]
invalid_strings = [
"$invalid",
"Infvalid\x00",
"Invalid Name",
'"Invalid " Name"',
'"Also Invalid Name""',
]
for v in valid_strings:
assert is_valid_snow_identifier(v)
for i in invalid_strings:
assert not is_valid_snow_identifier(i)