backend/schema/updater/schema_updater.cc (5 lines):
	- line 2170: // TODO: Return error if the change stream is tracking a
	- line 2172: // TODO: The parser would have returned a parser error if the
	- line 2310: // TODO: Specifying NULLS FIRST/LAST is unsupported in the
	- line 5493: // TODO : Error if any view depends on this table.
	- line 6128: // TODO : These should run in a ReadWriteTransaction with rollback


frontend/handlers/instances.cc (2 lines):
	- line 186: // TODO: In integration tests, the client library currently
	- line 197: // TODO: See discussion above, remove when the issue is fixed.


backend/schema/updater/schema_validation_context.h (2 lines):
	- line 63: // TODO : Split out into a separate Schema update validation
	- line 80: // TODO : Split out into a separate StatementValidationContext.


backend/database/change_stream/change_stream_partition_churner.cc (2 lines):
	- line 155: // TODO: Change stream churn transactions can potentially cause
	- line 186: // TODO : Consider optimizing the query to not return stale


backend/schema/updater/ddl_type_conversion.cc (2 lines):
	- line 82: // TODO : Update when we have a proper way to
	- line 192: // TODO : Update when we have a proper way to


backend/query/information_schema_catalog.cc (2 lines):
	- line 265: // TODO: cleanup the feature flag and revert the functions back
	- line 998: // TODO: Update the View::Column to store the actual


backend/schema/parser/ddl_parser.cc (2 lines):
	- line 2606: // TODO: Add support for column-level FGAC
	- line 2958: // TODO: Move the below if logic to sdl_options.cc.


backend/schema/catalog/schema.h (2 lines):
	- line 381: // TODO: b/395063354 - Remove default value once spangres is migrated
	- line 389: // TODO: b/395063354 - Remove default value once spangres is migrated


backend/schema/validators/change_stream_validator.cc (2 lines):
	- line 57: // TODO: Validate TVF name.
	- line 61: // TODO: Implement ValidateUpdate and add unit tests.


backend/query/query_engine.cc (2 lines):
	- line 217: // TODO : Replace with a better error transforming mechanism,
	- line 296: // TODO: b/310194797 - GSQL reference implementation returns NULL for


common/errors.cc (1 line):
	- line 305: // TODO: We should differentiate parameter type mismatch errors


backend/transaction/flush.h (1 line):
	- line 27: // TODO : Add support to write multiple ops to base storage


backend/schema/validators/udf_validator.cc (1 line):
	- line 96: // TODO Implement this function once UDFs are added to the catalog.


backend/schema/catalog/change_stream.h (1 line):
	- line 178: // TODO: assign the ID during change stream creation


backend/schema/validators/view_validator.cc (1 line):
	- line 162: // TODO : In case of dependency change due to alteration


backend/schema/catalog/proto_bundle.cc (1 line):
	- line 113: // TODO: Implement behavior to validate removals.


backend/schema/validators/property_graph_validator.cc (1 line):
	- line 58: // TODO: Add dependency validation.


backend/query/search/plain_full_text_tokenizer.cc (1 line):
	- line 72: // TODO: handle array gap in search evaluator.


backend/query/queryable_property_graph.h (1 line):
	- line 355: // TODO: Support full graph name path after spanner supports it


common/errors.h (1 line):
	- line 976: // TODO Create a singular function that takes a list of dependent


backend/schema/ddl/operations.proto (1 line):
	- line 805: // TODO: Add support for column-level FGAC


backend/schema/updater/schema_updater_tests/named_schema.cc (1 line):
	- line 49: // TODO: Add more tests once we can add tables, views, indexes, and


backend/schema/backfills/index_backfill.cc (1 line):
	- line 109: // TODO: Use actions framework for index backfills.


backend/schema/catalog/property_graph.proto (1 line):
	- line 21: // TODO: remove this proto and use the ZetaSQL one once when it's released.


backend/schema/validators/check_constraint_validator.cc (1 line):
	- line 188: // TODO When dropping support is added, a check should be added


backend/transaction/resolve.cc (1 line):
	- line 101: // TODO: Find a way of doing this without creating a hash set for


backend/query/catalog.h (1 line):
	- line 68: // TODO: Remove the default value for `options`.


backend/datamodel/key.cc (1 line):
	- line 39: // TODO: Refactor this to account for physical not null vs


backend/schema/catalog/column.h (1 line):
	- line 205: // TODO : Make external friend classes instead of nested classes.


backend/schema/updater/schema_updater_tests/generated_column.cc (1 line):
	- line 347: // TODO: find out why using T gets the "Table not found: T"


backend/query/prepare_property_graph_catalog.h (1 line):
	- line 51: // TODO: Implement this when support for views is needed.


backend/query/spanner_sys_catalog.cc (1 line):
	- line 52: // TODO: Use inheritance and pass SpannerSysColumnsMetadata


backend/schema/validators/column_validator.cc (1 line):
	- line 451: // TODO When dropping support is added, a check should be added


backend/datamodel/key.h (1 line):
	- line 114: // TODO: We may refactor this by creating an immutable class which


backend/schema/validators/database_options_validator.cc (1 line):
	- line 42: // TODO: Implement ValidateUpdate and add unit tests.