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feat(ingestion/sqlglot): add optional default_dialect parameter to sqlglot lineage (#10830)

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Nadav Gross 2024-07-16 22:28:14 +03:00 committed by GitHub
parent bb24651264
commit a8b07c5fe6
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2 changed files with 15 additions and 3 deletions
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2
metadata-ingestion/src/datahub/ingestion/graph/client.py
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@ -1241,6 +1241,7 @@ class DataHubGraph(DatahubRestEmitter):
env: str = DEFAULT_ENV,
default_db: Optional[str] = None,
default_schema: Optional[str] = None,
default_dialect: Optional[str] = None,
) -> "SqlParsingResult":
from datahub.sql_parsing.sqlglot_lineage import sqlglot_lineage
@ -1254,6 +1255,7 @@ class DataHubGraph(DatahubRestEmitter):
schema_resolver=schema_resolver,
default_db=default_db,
default_schema=default_schema,
default_dialect=default_dialect,
)
def create_tag(self, tag_name: str) -> str:

14
metadata-ingestion/src/datahub/sql_parsing/sqlglot_lineage.py
View File

@ -843,8 +843,14 @@ def _sqlglot_lineage_inner(
schema_resolver: SchemaResolverInterface,
default_db: Optional[str] = None,
default_schema: Optional[str] = None,
default_dialect: Optional[str] = None,
) -> SqlParsingResult:
if not default_dialect:
dialect = get_dialect(schema_resolver.platform)
else:
dialect = get_dialect(default_dialect)
if is_dialect_instance(dialect, "snowflake"):
# in snowflake, table identifiers must be uppercased to match sqlglot's behavior.
if default_db:
@ -1003,6 +1009,7 @@ def sqlglot_lineage(
schema_resolver: SchemaResolverInterface,
default_db: Optional[str] = None,
default_schema: Optional[str] = None,
default_dialect: Optional[str] = None,
) -> SqlParsingResult:
"""Parse a SQL statement and generate lineage information.
@ -1020,8 +1027,9 @@ def sqlglot_lineage(
can be brittle with respect to missing schema information and complex
SQL logic like UNNESTs.
The SQL dialect is inferred from the schema_resolver's platform. The
set of supported dialects is the same as sqlglot's. See their
The SQL dialect can be given as an argument called default_dialect or it can
be inferred from the schema_resolver's platform.
The set of supported dialects is the same as sqlglot's. See their
`documentation <https://sqlglot.com/sqlglot/dialects/dialect.html#Dialects>`_
for the full list.
@ -1035,6 +1043,7 @@ def sqlglot_lineage(
schema_resolver: The schema resolver to use for resolving table schemas.
default_db: The default database to use for unqualified table names.
default_schema: The default schema to use for unqualified table names.
default_dialect: A default dialect to override the dialect provided by 'schema_resolver'.
Returns:
A SqlParsingResult object containing the parsed lineage information.
@ -1059,6 +1068,7 @@ def sqlglot_lineage(
schema_resolver=schema_resolver,
default_db=default_db,
default_schema=default_schema,
default_dialect=default_dialect,
)
except Exception as e:
return SqlParsingResult.make_from_error(e)