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fix: Retrieve columns in compound indexes in correct order by waltaskew · Pull Request #798 · googleapis/python-spanner-sqlalchemy · GitHub

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fix: Retrieve columns in compound indexes in correct order #798

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olavloite merged 2 commits into from
Nov 10, 2025
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fix: Retrieve columns in compound indexes in correct order #798

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f904cbe
fix: Retrieve columns in compound indexes in correct order
waltaskew Nov 7, 2025
6851adf
Merge branch 'main' into index-order
olavloite Nov 10, 2025
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15 changes: 9 additions & 6 deletions google/cloud/sqlalchemy_spanner/sqlalchemy_spanner.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1267,33 +1267,36 @@ def get_multi_indexes(
i.table_schema,
i.table_name,
i.index_name,
(
SELECT ARRAY_AGG(ic.column_name)
ARRAY(
SELECT ic.column_name
FROM information_schema.index_columns ic
WHERE ic.index_name = i.index_name
AND ic.table_catalog = i.table_catalog
AND ic.table_schema = i.table_schema
AND ic.table_name = i.table_name
AND ic.column_ordering is not null
ORDER BY ic.ordinal_position
) as columns,
i.is_unique,
(
SELECT ARRAY_AGG(ic.column_ordering)
ARRAY(
SELECT ic.column_ordering
FROM information_schema.index_columns ic
WHERE ic.index_name = i.index_name
AND ic.table_catalog = i.table_catalog
AND ic.table_schema = i.table_schema
AND ic.table_name = i.table_name
AND ic.column_ordering is not null
ORDER BY ic.ordinal_position
) as column_orderings,
(
SELECT ARRAY_AGG(storing.column_name)
ARRAY(
SELECT storing.column_name
FROM information_schema.index_columns storing
WHERE storing.index_name = i.index_name
AND storing.table_catalog = i.table_catalog
AND storing.table_schema = i.table_schema
AND storing.table_name = i.table_name
AND storing.column_ordering is null
ORDER BY storing.ordinal_position
) as storing_columns,
FROM information_schema.indexes as i
JOIN information_schema.tables AS t
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30 changes: 29 additions & 1 deletion test/system/test_basics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@ def define_tables(cls, metadata):
Column("a", String, primary_key=True),
Column("b", String, primary_key=True),
)
Table(
composite_fk = Table(
"composite_fk",
metadata,
Column("my_a", String, primary_key=True),
Expand All @@ -118,6 +118,12 @@ def define_tables(cls, metadata):
name="composite_fk_composite_pk_a_b",
),
)
Index(
"idx_composte_fk_all",
composite_fk.c.my_a,
composite_fk.c.my_b,
composite_fk.c.my_c,
)

def test_hello_world(self, connection):
greeting = connection.execute(text("select 'Hello World'"))
Expand Down Expand Up @@ -356,6 +362,28 @@ def test_composite_fk_lookups(self, connection):
insp.get_multi_foreign_keys(filter_names=["composite_fk"]),
)

def test_composite_index_lookups(self, connection):
"""Ensures we introspect composite indexes."""

engine = connection.engine

insp = inspect(engine)
eq_(
{
(None, "composite_fk"): [
{
"name": "idx_composte_fk_all",
"column_names": ["my_a", "my_b", "my_c"],
"unique": False,
"column_sorting": {"my_a": "asc", "my_b": "asc", "my_c": "asc"},
"include_columns": [],
"dialect_options": {},
}
]
},
insp.get_multi_indexes(filter_names=["composite_fk"]),
)

def test_commit_timestamp(self, connection):
"""Ensures commit timestamps are set."""

Expand Down
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