GoogleCloudPlatform / cloud-spanner-emulator

Intro

Conditional complexity (also called cyclomatic complexity) is a term used to measure the complexity of software. The term refers to the number of possible paths through a program function. A higher value ofter means higher maintenance and testing costs (infosecinstitute.com).
Conditional complexity is calculated by counting all conditions in the program that can affect the execution path (e.g. if statement, loops, switches, and/or operators, try and catch blocks...).
Conditional complexity is measured at the unit level (methods, functions...).
Units are classified in four categories based on the measured McCabe index: 1-5 (simple units), 6-10 (medium complex units), 11-25 (complex units), 26+ (very complex units).

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Conditional Complexity Overall

There are 2,691 units with 41,550 lines of code in units (60.4% of code).

2 very complex units (559 lines of code)
17 complex units (2,778 lines of code)
108 medium complex units (8,558 lines of code)
207 simple units (7,005 lines of code)
2,357 very simple units (22,650 lines of code)

Legend:

51+

26-50

11-25

6-10

1-5

Alternative Visuals

3D view of all units

Conditional Complexity per Extension

51+

26-50

11-25

6-10

1-5

Conditional Complexity per Logical Component

primary logical decomposition

51+

26-50

11-25

6-10

1-5

Most Complex Units

Top 50 most complex units

Unit	# lines	McCabe index	# params
absl::StatusOr ValueFromProto() in frontend/converters/values.cc	282	89	2
void BuildCloudDDLStatement() in backend/schema/parser/ddl_parser.cc	277	68	4
absl::Status ColumnValidator::ValidateUpdate() in backend/schema/validators/column_validator.cc	142	48	3
absl::Status SchemaUpdaterImpl::SetColumnDefinition() in backend/schema/updater/schema_updater.cc	204	47	6
absl::Status SchemaUpdaterImpl::AlterTable() in backend/schema/updater/schema_updater.cc	238	42	2
absl::Status QueryValidator::CheckHintValue() in backend/query/query_validator.cc	128	41	4
absl::Status IndexValidator::Validate() in backend/schema/validators/index_validator.cc	131	39	2
absl::StatusOr ValueToProto() in frontend/converters/values.cc	166	35	1
void PGCatalog::FillPGAttributeTable() in backend/query/pg_catalog.cc	206	33	0
void InformationSchemaCatalog::FillColumnsTable() in backend/query/information_schema_catalog.cc	176	33	0
absl::Status ColumnValidator::Validate() in backend/schema/validators/column_validator.cc	80	33	2
void PGCatalog::FillPGProcTable() in backend/query/pg_catalog.cc	235	30	0
absl::StatusOr SearchEvaluator::MatchQueryNode() in backend/query/search/search_evaluator.cc	113	30	3
void PGCatalog::FillPGClassTable() in backend/query/pg_catalog.cc	347	29	0
absl::Status TableValidator::ValidateUpdate() in backend/schema/validators/table_validator.cc	102	29	3
absl::Status TableValidator::Validate() in backend/schema/validators/table_validator.cc	126	28	2
absl::Status SchemaUpdaterImpl::CreateTable() in backend/schema/updater/schema_updater.cc	143	28	2
absl::Status ExecuteStreamingSql() in frontend/handlers/queries.cc	137	26	3
ddl::DDLStatementList Schema::Dump() in backend/schema/catalog/schema.cc	104	26	0
absl::Status ExecuteSql() in frontend/handlers/queries.cc	110	24	3
absl::Status SchemaUpdaterImpl::ValidateAlterDatabaseOptions() in backend/schema/updater/schema_updater.cc	54	24	1
CREATE TABLE T() in backend/schema/updater/schema_updater_tests/views.cc	452	24	2
int Key::Compare() in backend/datamodel/key.cc	36	23	1
absl::StatusOr DDLColumnTypeToGoogleSqlType() in backend/schema/updater/ddl_type_conversion.cc	106	23	3
absl::Status TypeToProto() in frontend/converters/types.cc	113	22	2
void ActionRegistry::BuildActionRegistry() in backend/actions/manager.cc	85	22	0
absl::StatusOr DDLColumnTypeToGoogleSqlType() in backend/schema/updater/ddl_type_conversion.cc	88	22	3
absl::StatusOr RewriteColumnValue() in backend/schema/backfills/column_value_backfill.cc	54	22	3
absl::Status TypeFromProto() in frontend/converters/types.cc	117	21	4
absl::Status GetNotNullColumns() in backend/query/ann_validator.cc	69	21	3
ddl::TypeDefinition GoogleSqlTypeToDDLType() in backend/schema/updater/ddl_type_conversion.cc	52	21	1
absl::Status SetVectorIndexOptions() in backend/schema/updater/schema_updater.cc	63	21	3
absl::Status SchemaUpdaterImpl::CreateFunction() in backend/schema/updater/schema_updater.cc	111	21	1
void TopologicalOrderSchemaNodes() in backend/schema/printer/print_ddl.cc	71	21	3
bool IsSupportedColumnType() in backend/datamodel/types.cc	41	20	1
bool IsAllowedTypeChange() in backend/schema/validators/column_validator.cc	30	20	2
ddl::ColumnDefinition GoogleSqlTypeToDDLColumnType() in backend/schema/updater/ddl_type_conversion.cc	53	20	1
absl::Status SchemaUpdaterImpl::ValidateSequenceOptions() in backend/schema/updater/schema_updater.cc	61	20	2
void PGCatalog::FillPGConstraintTable() in backend/query/pg_catalog.cc	174	19	0
absl::Status ANNValidator::VisitResolvedLimitOffsetScan() in backend/query/ann_validator.cc	74	19	1
absl::Status ModelValidator::Validate() in backend/schema/validators/model_validator.cc	62	19	2
void InformationSchemaCatalog::FillConstraintColumnUsageTable() in backend/query/information_schema_catalog.cc	117	18	0
absl::Status GeneratedColumnEffector::Effect() in backend/actions/generated_column.cc	57	18	3
absl::Status SchemaUpdaterImpl::AlterSequence() in backend/schema/updater/schema_updater.cc	64	18	2
absl::Status ExecuteBatchDml() in frontend/handlers/queries.cc	78	17	3
absl::Status FilterResolvedFunction() in backend/query/feature_filter/sql_feature_filter.cc	41	17	3
absl::Status TransactionStore::Read() in backend/transaction/transaction_store.cc	73	17	5
absl::Status UdfValidator::ValidateUpdate() in backend/schema/validators/udf_validator.cc	74	17	3
absl::Status SchemaUpdaterImpl::AlterColumnSetDropDefault() in backend/schema/updater/schema_updater.cc	72	17	5
absl::Status SchemaUpdaterImpl::ValidateChangeStreamForClause() in backend/schema/updater/schema_updater.cc	72	17	2