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fix(ingest): enable fuzzy case resolution for oracle sql #12778

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merged 3 commits into from
Mar 5, 2025
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fix(ingest): enable fuzzy case resolution for oracle sql #12778

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de02904
start updating oracle
hsheth2 Mar 4, 2025
a17f8d0
add new tests
hsheth2 Mar 4, 2025
06a67df
update oracle test
hsheth2 Mar 4, 2025
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7 changes: 7 additions & 0 deletions metadata-ingestion/src/datahub/sql_parsing/sql_parsing_common.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,12 +24,19 @@
# For SQL server, the default collation rules mean that all identifiers (schema, table, column names)
# are case preserving but case insensitive.
"mssql",
# Oracle automatically converts unquoted identifiers to uppercase.
# https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/Database-Object-Names-and-Qualifiers.html#GUID-3C59E44A-5140-4BCA-B9E1-3039C8050C49
# In our Oracle connector, we then normalize column names to lowercase. This behavior
# actually comes from the underlying Oracle sqlalchemy dialect.
# https://github.com/sqlalchemy/sqlalchemy/blob/d9b4d8ff3aae504402d324f3ebf0b8faff78f5dc/lib/sqlalchemy/dialects/oracle/base.py#L2579
"oracle",
}
DIALECTS_WITH_DEFAULT_UPPERCASE_COLS = {
# In some dialects, column identifiers are effectively case insensitive
# because they are automatically converted to uppercase. Most other systems
# automatically lowercase unquoted identifiers.
"snowflake",
"oracle",
}
assert DIALECTS_WITH_DEFAULT_UPPERCASE_COLS.issubset(
DIALECTS_WITH_CASE_INSENSITIVE_COLS
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