apache / calcite - Conditional Complexity

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 11,819 units with 121,401 lines of code in units (42.3% of code).

8 very complex units (1,784 lines of code)
45 complex units (5,149 lines of code)
291 medium complex units (17,262 lines of code)
646 simple units (18,862 lines of code)
10,829 very simple units (78,344 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
public SqlKind getFunctionKind() in core/src/main/java/org/apache/calcite/sql/SqlKind.java	88	82	0
throw newValidationError() in core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java	473	79	2
private SqlNode registerFrom() in core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java	339	76	9
private Expression getConvertExpression() in core/src/main/java/org/apache/calcite/adapter/enumerable/RexToLixTranslator.java	261	74	4
protected FrameImpl createListFrame() in core/src/main/java/org/apache/calcite/sql/pretty/SqlPrettyWriter.java	196	62	4
public RexNode makeLiteral() in core/src/main/java/org/apache/calcite/rex/RexBuilder.java	154	59	4
private static void parse() in druid/src/main/java/org/apache/calcite/adapter/druid/DruidConnectionImpl.java	162	58	6
public T getValueAs() in core/src/main/java/org/apache/calcite/sql/SqlLiteral.java	111	51	1
public static boolean valueMatchesType() in core/src/main/java/org/apache/calcite/rex/RexLiteral.java	85	50	3
throw newValidationError() in core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java	231	48	2
protected void perform() in core/src/main/java/org/apache/calcite/rel/rules/materialize/MaterializedViewRule.java	252	46	3
public static Expression convert() in core/src/main/java/org/apache/calcite/adapter/enumerable/EnumUtils.java	172	46	3
private void findSubQueries() in core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java	94	44	4
public static Expression createExpression() in core/src/main/java/org/apache/calcite/runtime/rtti/RuntimeTypeInformation.java	119	43	1
RexNode simplify() in core/src/main/java/org/apache/calcite/rex/RexSimplify.java	73	41	2
private static void parseFieldForName() in druid/src/main/java/org/apache/calcite/adapter/druid/DruidConnectionImpl.java	123	40	6
private static void splitJoinCondition() in core/src/main/java/org/apache/calcite/plan/RelOptUtil.java	157	40	7
public static Expression translateLiteral() in core/src/main/java/org/apache/calcite/adapter/enumerable/RexToLixTranslator.java	106	40	4
private static void appendAsJava() in core/src/main/java/org/apache/calcite/rex/RexLiteral.java	126	39	6
private static ExpressionWriter write() in linq4j/src/main/java/org/apache/calcite/linq4j/tree/ConstantExpression.java	150	38	3
public static boolean valueMatchesType() in core/src/main/java/org/apache/calcite/sql/SqlLiteral.java	59	38	2
private void translateAgg() in core/src/main/java/org/apache/calcite/sql2rel/AggConverter.java	198	38	6
private void substituteSubQuery() in core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java	187	38	2
public SqlNode toSql() in core/src/main/java/org/apache/calcite/rel/rel2sql/SqlImplementor.java	170	37	2
public RexNode makeCast() in core/src/main/java/org/apache/calcite/rex/RexBuilder.java	85	36	6
public boolean isValid() in core/src/main/java/org/apache/calcite/util/PartiallyOrderedSet.java	125	36	1
public static boolean canCastFrom() in core/src/main/java/org/apache/calcite/sql/type/SqlTypeUtil.java	90	35	3
public static DatabaseProduct getProduct() in core/src/main/java/org/apache/calcite/sql/SqlDialect.java	77	34	2
public double typeValueSize() in core/src/main/java/org/apache/calcite/rel/metadata/RelMdSize.java	47	34	2
private boolean needNewSubQuery() in core/src/main/java/org/apache/calcite/rel/rel2sql/SqlImplementor.java	73	33	4
static void dumpGraphviz() in core/src/main/java/org/apache/calcite/plan/volcano/Dumpers.java	167	33	2
private static Expression checkExpressionPadTruncate() in core/src/main/java/org/apache/calcite/adapter/enumerable/RexToLixTranslator.java	80	33	3
public Query simplify() in core/src/main/java/org/apache/calcite/sql/advise/SqlSimpleParser.java	100	32	1
private static boolean checkSupport() in core/src/main/java/org/apache/calcite/plan/RexImplicationChecker.java	52	32	2
private void registerQuery() in core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java	300	31	7
public boolean supportsFunction() in core/src/main/java/org/apache/calcite/sql/SqlDialect.java	38	31	3
private RelBuilder project_() in core/src/main/java/org/apache/calcite/tools/RelBuilder.java	135	30	5
private static boolean supportedRexCall() in elasticsearch/src/main/java/org/apache/calcite/adapter/elasticsearch/PredicateAnalyzer.java	61	29	1
private boolean optimize() in linq4j/src/main/java/org/apache/calcite/linq4j/tree/BlockBuilder.java	90	28	2
public Collection getTypeNames() in core/src/main/java/org/apache/calcite/sql/type/SqlTypeFamily.java	64	28	0
private static boolean canRollUp() in core/src/main/java/org/apache/calcite/rex/RexSimplify.java	48	28	2
public static void print() in core/src/main/java/org/apache/calcite/util/Util.java	105	28	3
protected void convertFrom() in core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java	114	28	3
Profile profile() in core/src/main/java/org/apache/calcite/profile/SimpleProfiler.java	122	28	1
public String sql() in core/src/main/java/org/apache/calcite/materialize/Lattice.java	112	27	4
protected void validateJoin() in core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java	105	27	2
public SqlTypeName typeName() in core/src/main/java/org/apache/calcite/sql/SqlIntervalQualifier.java	45	27	0
protected void perform() in core/src/main/java/org/apache/calcite/rel/rules/FilterJoinRule.java	103	27	3
boolean canRemoveCastFromLiteral() in core/src/main/java/org/apache/calcite/rex/RexBuilder.java	69	27	2
private void matchRecurse() in core/src/main/java/org/apache/calcite/plan/volcano/VolcanoRuleCall.java	118	27	1