fix(ingest/redshift): handle multiline alter table commands

metadata-ingestion/setup.py

@@ -166,7 +166,6 @@
     *sqlglot_lib,
     "GitPython>2",
     "python-liquid",
-    *sqlglot_lib,
 }
 
 bigquery_common = {

metadata-ingestion/src/datahub/ingestion/source/redshift/lineage.py

@@ -53,6 +53,7 @@
 )
 from datahub.metadata.urns import DatasetUrn
 from datahub.sql_parsing.schema_resolver import SchemaResolver
+from datahub.sql_parsing.sqlglot_utils import get_dialect, parse_statement
 from datahub.utilities import memory_footprint
 from datahub.utilities.dedup_list import deduplicate_list
 
@@ -128,7 +129,7 @@ def parse_alter_table_rename(default_schema: str, query: str) -> Tuple[str, str,
     Parses an ALTER TABLE ... RENAME TO ... query and returns the schema, previous table name, and new table name.
     """
 
-    parsed_query = sqlglot.parse_one(query, dialect="redshift")
+    parsed_query = parse_statement(query, dialect=get_dialect("redshift"))
     assert isinstance(parsed_query, sqlglot.exp.AlterTable)
     prev_name = parsed_query.this.name
     rename_clause = parsed_query.args["actions"][0]
@@ -865,10 +866,19 @@ def _process_table_renames(
         for rename_row in RedshiftDataDictionary.get_alter_table_commands(
             connection, query
         ):
-            schema, prev_name, new_name = parse_alter_table_rename(
-                default_schema=self.config.default_schema,
-                query=rename_row.query_text,
-            )
+            # Redshift's system table has some issues where it encodes newlines as \n instead a proper
+            # newline character. This can cause issues in our parser.
+            query_text = rename_row.query_text.replace("\\n", "\n")
+
+            try:
+                schema, prev_name, new_name = parse_alter_table_rename(
+                    default_schema=self.config.default_schema,
+                    query=query_text,
+                )
+            except ValueError as e:
+                logger.info(f"Failed to parse alter table rename: {e}")
+                self.report.num_alter_table_parse_errors += 1
+                continue
 
             prev_urn = make_dataset_urn_with_platform_instance(
                 platform=LineageDatasetPlatform.REDSHIFT.value,

metadata-ingestion/src/datahub/ingestion/source/redshift/report.py

@@ -45,6 +45,7 @@ class RedshiftReport(
     num_lineage_dropped_not_support_copy_path: int = 0
     num_lineage_processed_temp_tables = 0
     num_lineage_dropped_s3_path: int = 0
+    num_alter_table_parse_errors: int = 0
 
     lineage_start_time: Optional[datetime] = None
     lineage_end_time: Optional[datetime] = None