core/src/main/java/org/apache/calcite/adapter/clone/ArrayTable.java (16 lines):
	- line 378: throw new UnsupportedOperationException(); // TODO:
	- line 382: throw new UnsupportedOperationException(); // TODO:
	- line 386: throw new UnsupportedOperationException(); // TODO:
	- line 390: throw new UnsupportedOperationException(); // TODO:
	- line 394: throw new UnsupportedOperationException(); // TODO:
	- line 398: throw new UnsupportedOperationException(); // TODO:
	- line 499: throw new UnsupportedOperationException(); // TODO:
	- line 503: throw new UnsupportedOperationException(); // TODO:
	- line 507: throw new UnsupportedOperationException(); // TODO:
	- line 511: throw new UnsupportedOperationException(); // TODO:
	- line 515: throw new UnsupportedOperationException(); // TODO:
	- line 537: throw new UnsupportedOperationException(); // TODO:
	- line 541: throw new UnsupportedOperationException(); // TODO:
	- line 545: throw new UnsupportedOperationException(); // TODO:
	- line 549: throw new UnsupportedOperationException(); // TODO:
	- line 553: throw new UnsupportedOperationException(); // TODO:


core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java (9 lines):
	- line 293: // TODO jvs 11-Dec-2008:  make this local to performUnconditionalRewrites
	- line 721: // TODO: do real implicit collation here
	- line 788: // TODO: do real implicit collation here
	- line 1913: // TODO jvs 10-Oct-2005:  get rid of this workaround once
	- line 2048: // TODO jvs 12-Feb-2005:  proper type name formatting
	- line 2226: // TODO:  eventually should assert(operandTypeInference != null)
	- line 3067: // FIXME jvs 9-Feb-2005:  Correlation should
	- line 5163: // TODO: when SELECT appears as a value sub-query, should be using
	- line 7346: // TODO: Don't expand the list every time. Maybe keep an expanded


server/src/main/java/org/apache/calcite/server/ServerDdlExecutor.java (8 lines):
	- line 262: requireNonNull(pair.left); // TODO: should not assume parent schema exists
	- line 415: requireNonNull(pair.left); // TODO: should not assume parent schema exists
	- line 438: requireNonNull(pair.left); // TODO: should not assume parent schema exists
	- line 471: requireNonNull(pair.left); // TODO: should not assume parent schema exists
	- line 590: requireNonNull(pair.left); // TODO: should not assume parent schema exists
	- line 606: // TODO: should not assume parent schema exists
	- line 648: requireNonNull(pair.left); // TODO: should not assume parent schema exists
	- line 674: requireNonNull(pair.left); // TODO: should not assume parent schema exists


core/src/main/java/org/apache/calcite/config/CalciteSystemProperty.java (7 lines):
	- line 69: // TODO review zabetak:
	- line 144: // TODO review zabetak:
	- line 287: // TODO review zabetak:
	- line 307: // TODO review zabetak:
	- line 319: // TODO review zabetak:
	- line 330: // TODO review zabetak:
	- line 343: // TODO review zabetak:


core/src/main/java/org/apache/calcite/sql/type/SqlTypeUtil.java (7 lines):
	- line 452: // TODO jvs 9-Dec-2004:  once we support LOB types
	- line 466: // TODO angel 8-June-2005: Multiset should be LOB
	- line 659: // TODO Wael Jan-24-2005: Need a better way to tell fennel this
	- line 814: // TODO jvs 2-Jan-2005:  handle all the other cases like
	- line 1084: // TODO jvs 14-Feb-2005:  generalize to any kind of
	- line 1128: // TODO jvs 28-Dec-2004:  support row types, user-defined types,
	- line 1194: // TODO jvs 28-Dec-2004:  collation


core/src/main/java/org/apache/calcite/sql/type/SqlTypeFactoryImpl.java (6 lines):
	- line 410: // TODO:  refine collation combination rules
	- line 442: // TODO: come up with a cleaner way to support
	- line 501: // TODO:  only promote when required
	- line 524: // TODO: come up with a cleaner way to support
	- line 536: // TODO jvs 4-June-2005:  This shouldn't be necessary;
	- line 549: // TODO: come up with a cleaner way to support


core/src/main/java/org/apache/calcite/util/mapping/Mappings.java (6 lines):
	- line 855: * <p>TODO: figure out which interfaces this should extend
	- line 899: * <p>TODO: figure out which interfaces this should extend
	- line 1569: // FIXME: Mapping type might be weaker than parent.
	- line 1582: // FIXME: It's possible that parent was not the identity but that
	- line 1632: // FIXME: Mapping type might be weaker than parent.
	- line 1637: // FIXME: Possible that parent is not identity but this overriding


core/src/main/java/org/apache/calcite/schema/impl/AggregateFunctionImpl.java (5 lines):
	- line 89: final Method mergeMethod = null; // TODO:
	- line 123: // TODO: check add returns A
	- line 124: // TODO: check merge returns A
	- line 125: // TODO: check merge args are (A, A)
	- line 126: // TODO: check result args are (A)


core/src/main/java/org/apache/calcite/sql2rel/RelDecorrelator.java (5 lines):
	- line 138: * <p>TODO:
	- line 2022: // TODO: ideally this only needs to be called if the result
	- line 2035: // TODO: Comments in RexShuttle.visitCall() mention other
	- line 3021: // TODO: create immutable copies of all maps
	- line 3041: // TODO: Multimap does not have well-defined equals behavior


testkit/src/main/java/org/apache/calcite/sql/parser/SqlParserTest.java (4 lines):
	- line 825: // TODO: should fail in parser
	- line 7416: // TODO: Postgres gives "syntax error at ')'", which might be better
	- line 7421: // TODO: Postgres gives "syntax error at ')'", which might be better
	- line 7451: // TODO: Support this in Calcite.


core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java (4 lines):
	- line 2573: // TODO combine with buildCollation method after support NULLS_FIRST/NULLS_LAST
	- line 3797: // TODO:  add validation rules to SqlValidator also
	- line 3887: // TODO:  handle collation sequence
	- line 3888: // TODO: flag expressions as non-standard


core/src/main/java/org/apache/calcite/plan/hep/HepPlanner.java (4 lines):
	- line 458: // FIXME jvs 25-Sept-2006:  I had to move this earlier because
	- line 486: // TODO jvs 4-Apr-2006:  enhance TopologicalOrderIterator
	- line 686: // TODO jvs 5-Apr-2006:  Take the one that gives the best
	- line 1064: // TODO jvs 20-Apr-2006: This is overly conservative.  Better would be


core/src/main/java/org/apache/calcite/sql/type/OperandTypes.java (4 lines):
	- line 1243: // TODO: datetime+interval checking missing
	- line 1244: // TODO: interval+datetime checking missing
	- line 1266: // TODO:  compatibility check
	- line 1678: // FIXME we assume that there is exactly one operand


core/src/main/java/org/apache/calcite/sql2rel/RelStructuredTypeFlattener.java (3 lines):
	- line 105: // TODO jvs 10-Feb-2005:  factor out generic rewrite helper, with the
	- line 453: // TODO jvs 10-Feb-2005
	- line 790: // TODO jvs 11-Feb-2005:  share code with SqlToRelConverter


core/src/main/java/org/apache/calcite/adapter/clone/CloneSchema.java (3 lines):
	- line 55: // TODO: implement 'driver' property
	- line 56: // TODO: implement 'source' property
	- line 57: // TODO: test Factory


core/src/main/java/org/apache/calcite/prepare/CalcitePrepareImpl.java (3 lines):
	- line 467: // TODO:
	- line 471: // TODO:
	- line 680: // FIXME: getValidatedNodeType is wrong for DML


core/src/main/java/org/apache/calcite/runtime/Enumerables.java (3 lines):
	- line 127: // TODO 26.12.18 jf: add row states (whatever this is?)
	- line 140: recentRows.subList(0, 0); // TODO:
	- line 141: final List<Integer> rowStates = ImmutableList.of(); // TODO:


core/src/main/java/org/apache/calcite/rel/rules/FilterTableFunctionTransposeRule.java (3 lines):
	- line 77: // TODO:  support more than one relational input; requires
	- line 81: // TODO:  support mappings other than 1-to-1
	- line 101: // TODO:  these need to be non-zero once we


linq4j/src/main/java/org/apache/calcite/linq4j/tree/Expressions.java (3 lines):
	- line 1911: // TODO: use method
	- line 2146: // TODO: use method
	- line 3125: // FIXME: Implement the rules in modulo


core/src/main/java/org/apache/calcite/sql/type/SqlTypeName.java (3 lines):
	- line 256: // TODO: provide real support for these eventually
	- line 260: // TODO: additional types not yet supported. See ExtraSqlTypes.
	- line 846: // TODO: Minimum numeric scale for decimal


geode/src/main/java/org/apache/calcite/adapter/geode/rel/GeodeFilter.java (2 lines):
	- line 179: // FIXME This will not work in all cases (for example, we ignore string encoding)
	- line 385: // FIXME This will not work in all cases (for example, we ignore string encoding)


core/src/main/java/org/apache/calcite/jdbc/JavaTypeFactoryImpl.java (2 lines):
	- line 82: // FIXME: watch out for recursion
	- line 145: throw new UnsupportedOperationException("TODO: implement " + type);


core/src/main/java/org/apache/calcite/adapter/enumerable/RexImpTable.java (2 lines):
	- line 2226: // TODO: pass in the values of arguments that are literals
	- line 4120: // TODO: verify if the variable is needed


core/src/main/java/org/apache/calcite/util/StackWriter.java (2 lines):
	- line 207: // TODO: something more efficient using searches for
	- line 216: // TODO: something more efficient using searches for


core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableTableModify.java (2 lines):
	- line 62: throw new AssertionError(); // TODO: user error in validator
	- line 90: requireNonNull(expression, "expression"); // TODO: user error in validator


core/src/main/java/org/apache/calcite/rel/core/Project.java (2 lines):
	- line 226: // TODO: move to RelBuilder?
	- line 227: // TODO: replace calls to getNamedProjects


core/src/main/java/org/apache/calcite/util/format/FormatElementEnum.java (2 lines):
	- line 382: // TODO: how to support timezones?
	- line 438: // TODO: be sure to deal with TZ


core/src/main/java/org/apache/calcite/materialize/MaterializationService.java (2 lines):
	- line 238: // TODO: Allow/deny roll-up based on a size factor. If the source is only
	- line 241: // TODO: Use a partially-ordered set data structure, so we are not scanning


core/src/main/java/org/apache/calcite/sql2rel/RelFieldTrimmer.java (2 lines):
	- line 111: * <p>TODO: Change 2nd arg of the {@link #trimFields} method from BitSet to
	- line 846: // FIXME: We ought to collect extra fields for each input


core/src/main/java/org/apache/calcite/rel/rules/MultiJoinOptimizeBushyRule.java (2 lines):
	- line 68: * <p>TODO:
	- line 175: // and 3-or-more-factor conditions are advanced. (TODO:)


core/src/main/java/org/apache/calcite/tools/PigRelBuilder.java (2 lines):
	- line 83: scan(path.replace(".csv", "")); // TODO: use a UDT
	- line 101: // TODO: Use partitioner and parallel


geode/src/main/java/org/apache/calcite/adapter/geode/rel/GeodeRules.java (2 lines):
	- line 319: // FIXME Ignore casts for rel and assume they aren't really necessary
	- line 343: // FIXME Ignore casts for rel and assume they aren't really necessary


splunk/src/main/java/org/apache/calcite/adapter/splunk/SplunkPushDownRule.java (2 lines):
	- line 308: // TODO: use StringBuilder instead of String
	- line 309: // TODO: refactor this to use more tree like parsing, need to also


core/src/main/java/org/apache/calcite/sql/fun/SqlStdOperatorTable.java (2 lines):
	- line 715: // TODO: check if precedence is correct
	- line 727: // TODO: check if precedence is correct


core/src/main/java/org/apache/calcite/jdbc/CalciteMetaImpl.java (2 lines):
	- line 255: // stmt.close(); // TODO: implement
	- line 676: // TODO: share code with prepare and createIterable


core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java (2 lines):
	- line 4924: // TODO: make Locale configurable. ENGLISH set for weekday
	- line 6533: // TODO: use Multisets?


mongodb/src/main/java/org/apache/calcite/adapter/mongodb/MongoRules.java (2 lines):
	- line 113: return "'" + s + "'"; // TODO: handle embedded quotes
	- line 737: throw new AssertionError(); // TODO:


core/src/main/java/org/apache/calcite/adapter/jdbc/JdbcRules.java (2 lines):
	- line 1036: throw new AssertionError(); // TODO: user error in validator
	- line 1040: throw new AssertionError(); // TODO: user error in validator


core/src/main/java/org/apache/calcite/plan/TableAccessMap.java (2 lines):
	- line 31: // TODO jvs 9-Mar-2006:  move this class to another package; it
	- line 192: // FIXME jvs 1-Feb-2006:  Don't rely on object type here;


core/src/main/java/org/apache/calcite/sql/SqlKind.java (2 lines):
	- line 1191: // TODO: deprecate TUMBLE_START.
	- line 1196: // TODO: deprecate TUMBLE_END.


core/src/main/java/org/apache/calcite/jdbc/CalciteConnectionImpl.java (2 lines):
	- line 285: return castNonNull(null); // TODO:
	- line 289: return castNonNull(null); // TODO:


linq4j/src/main/java/org/apache/calcite/linq4j/tree/Types.java (2 lines):
	- line 138: throw new RuntimeException("unsupported type " + type); // TODO:
	- line 350: // TODO: improve this


core/src/main/java/org/apache/calcite/sql/SqlSetOption.java (2 lines):
	- line 95: * <p>TODO: Rename to 'name' when deprecated `name` field is removed.
	- line 191: // TODO: Rename to 'getName' when deprecated `getName` method is removed.


core/src/main/java/org/apache/calcite/interpreter/AggregateNode.java (2 lines):
	- line 190: SqlConformanceEnum.DEFAULT; // TODO: get this from implementor
	- line 374: // TODO: fix the size of this row.


core/src/main/java/org/apache/calcite/rel/core/Window.java (2 lines):
	- line 218: // TODO #1. Add memory cost.
	- line 219: // TODO #2. MIN and MAX have higher CPU cost than SUM and COUNT.


core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorException.java (1 line):
	- line 59: // TODO: see note in CalciteException constructor


core/src/main/java/org/apache/calcite/plan/RelOptUtil.java (1 line):
	- line 2353: // TODO: change 'equal' to 'eq', which is stronger.


buildSrc/subprojects/javacc/src/main/kotlin/org/apache/calcite/buildtools/javacc/JavaCCPlugin.kt (1 line):
	- line 38: // TODO: use properties for versions


core/src/main/java/org/apache/calcite/rel/rules/materialize/MaterializedViewAggregateRule.java (1 line):
	- line 107: // TODO: Rewriting with grouping sets not supported yet


core/src/main/java/org/apache/calcite/plan/RelTraitPropagationVisitor.java (1 line):
	- line 79: // FIXME: Return the new rel. We can no longer traits in-place,


core/src/main/java/org/apache/calcite/rel/type/RelDataTypeFactoryImpl.java (1 line):
	- line 637: // TODO jvs 13-Dec-2004:  move to OJTypeFactoryImpl?


core/src/main/java/org/apache/calcite/sql/fun/SqlMultisetMemberOfOperator.java (1 line):
	- line 41: // TODO check if precedence is correct


core/src/main/java/org/apache/calcite/rel/metadata/RelMdUtil.java (1 line):
	- line 965: // TODO zfong 6/21/06 - Broadbase has code to handle date


core/src/main/java/org/apache/calcite/materialize/MaterializationActor.java (1 line):
	- line 40: // Not an actor yet -- TODO make members private and add request/response


druid/src/main/java/org/apache/calcite/adapter/druid/DruidQuery.java (1 line):
	- line 868: // TODO Remove it! if else statement is not really needed it


core/src/main/java/org/apache/calcite/rel/rules/LoptOptimizeJoinRule.java (1 line):
	- line 1673: // TODO: is the above if (replacementKeys==null) check placed properly?


core/src/main/java/org/apache/calcite/plan/Strong.java (1 line):
	- line 166: // TODO Enrich with more possible cases?


core/src/main/java/org/apache/calcite/plan/volcano/VolcanoPlanner.java (1 line):
	- line 391: // TODO: restructure RelTraitSet to allow a list of entries


core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableBatchNestedLoopJoin.java (1 line):
	- line 142: // TODO Add cost of last loop (the one that looks for the match)


core/src/main/java/org/apache/calcite/rel/rules/FilterJoinRule.java (1 line):
	- line 105: // TODO - add logic to derive additional filters.  E.g., from


core/src/main/java/org/apache/calcite/runtime/Pattern.java (1 line):
	- line 73: final Stack<Pattern> stack = new Stack<>(); // TODO: replace with Deque


core/src/main/java/org/apache/calcite/sql2rel/SqlNodeToRexConverterImpl.java (1 line):
	- line 106: // TODO:  preserve fixed-point precision and large integers


core/src/main/java/org/apache/calcite/interpreter/JoinNode.java (1 line):
	- line 94: // TODO: CALCITE-4308, JointNode in Interpreter might fail with NPE for FULL join


core/src/main/java/org/apache/calcite/plan/VisitorDataContext.java (1 line):
	- line 152: // TODO: Support few more supported cases


pig/src/main/java/org/apache/calcite/adapter/pig/PigFilter.java (1 line):
	- line 137: * <p>TODO: do proper literal to string conversion + escaping


core/src/main/java/org/apache/calcite/rel/RelNode.java (1 line):
	- line 172: * TODO: is this required?


file/src/main/java/org/apache/calcite/adapter/file/FileReader.java (1 line):
	- line 162: // TODO: this needs to be reworked to properly cache the headings


core/src/main/java/org/apache/calcite/sql/fun/SqlExtractFunction.java (1 line):
	- line 55: // TODO: Return type should be decimal for seconds


core/src/main/java/org/apache/calcite/rel/metadata/RelMdMaxRowCount.java (1 line):
	- line 210: // FIXME This is a short-term fix for [CALCITE-1018]. A complete


core/src/main/java/org/apache/calcite/plan/hep/HepProgramBuilder.java (1 line):
	- line 69: * <p>TODO: support classification via rule annotations.


core/src/main/java/org/apache/calcite/sql/validate/SelectScope.java (1 line):
	- line 159: // TODO: compare fully qualified names


core/src/main/java/org/apache/calcite/rel/rules/AbstractJoinExtractFilterRule.java (1 line):
	- line 58: // FIXME Enable this rule for joins with system fields


core/src/main/java/org/apache/calcite/adapter/enumerable/EnumUtils.java (1 line):
	- line 438: // TODO use Expressions#convertChecked to throw exception in case of overflow (CALCITE-6366)


core/src/main/java/org/apache/calcite/util/XmlOutput.java (1 line):
	- line 373: // TODO: support string that contains cdataEnd literal values


spark/src/main/java/org/apache/calcite/adapter/spark/SparkRules.java (1 line):
	- line 110: // TODO: add SparkProjectRule, SparkFilterRule, SparkProjectToCalcRule,


core/src/main/java/org/apache/calcite/runtime/CalciteException.java (1 line):
	- line 62: // TODO: Force the caller to pass in a Logger as a trace argument for


core/src/main/java/org/apache/calcite/util/BuiltInMethod.java (1 line):
	- line 982: // TODO: split enum in three different ones


core/src/main/java/org/apache/calcite/sql/validate/IdentifierNamespace.java (1 line):
	- line 194: // TODO:  expand qualifiers for column references also


piglet/src/main/java/org/apache/calcite/piglet/PigRelOpVisitor.java (1 line):
	- line 456: // TODO Hanlde custom sortFunc from Pig???


druid/src/main/java/org/apache/calcite/adapter/druid/DruidConnectionImpl.java (1 line):
	- line 137: /*@TODO This need to be revisited. The logic seems implying that only


mongodb/src/main/java/org/apache/calcite/adapter/mongodb/MongoSort.java (1 line):
	- line 71: // TODO: NULLS FIRST and NULLS LAST


core/src/main/java/org/apache/calcite/rel/metadata/CachingRelMetadataProvider.java (1 line):
	- line 73: // TODO jvs 30-Mar-2006: Use meta-metadata to decide which metadata


core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableCalc.java (1 line):
	- line 254: // TODO: generics


core/src/main/java/org/apache/calcite/materialize/LatticeSuggester.java (1 line):
	- line 349: // TODO: assign alias based on node in bestMatch


core/src/main/java/org/apache/calcite/plan/volcano/TopDownRuleDriver.java (1 line):
	- line 65: private final Stack<Task> tasks = new Stack<>(); // TODO: replace with Deque


splunk/src/main/java/org/apache/calcite/adapter/splunk/search/SplunkConnectionImpl.java (1 line):
	- line 163: // TODO: remove this once the csv parser can handle leading spaces


core/src/main/java/org/apache/calcite/sql/type/MultisetOperandTypeChecker.java (1 line):
	- line 60: // TODO: this won't work if element types are of ROW types and there is


cassandra/src/main/java/org/apache/calcite/adapter/cassandra/CassandraFilter.java (1 line):
	- line 281: // FIXME This will not work in all cases (for example, we ignore string encoding)


core/src/main/java/org/apache/calcite/schema/impl/ListTransientTable.java (1 line):
	- line 103: // TODO cleaner way to handle non-array objects?


core/src/main/java/org/apache/calcite/sql/validate/AggChecker.java (1 line):
	- line 128: // TODO: It would be better if we always compared fully-qualified


core/src/main/java/org/apache/calcite/rel/core/Values.java (1 line):
	- line 180: // TODO jvs 19-Feb-2006: strengthen this a bit.  For example,


linq4j/src/main/java/org/apache/calcite/linq4j/EnumerableDefaults.java (1 line):
	- line 1111: // TODO: the implementation assumes accumulatorAdder always produces non-nullable values


core/src/main/java/org/apache/calcite/sql2rel/StandardConvertletTable.java (1 line):
	- line 724: // TODO: adopt a more conventional definition/instance structure


core/src/main/java/org/apache/calcite/sql/type/ObjectSqlType.java (1 line):
	- line 87: // TODO jvs 10-Feb-2005:  proper quoting; dump attributes withDetail?


core/src/main/java/org/apache/calcite/rex/RexProgramBuilder.java (1 line):
	- line 569: * <p>TODO: Refactor the above create method in terms of this one.


core/src/main/java/org/apache/calcite/rel/rules/JoinCommuteRule.java (1 line):
	- line 250: // FIXME Enable this rule for joins with system fields


core/src/main/java/org/apache/calcite/rel/RelNodes.java (1 line):
	- line 80: // TODO: a new method RelNode.accept(RexVisitor, BiConsumer), with similar


core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableWindow.java (1 line):
	- line 992: // TODO: support date + interval somehow


buildSrc/subprojects/fmpp/src/main/kotlin/org/apache/calcite/buildtools/fmpp/FmppPlugin.kt (1 line):
	- line 36: // TODO: use properties for versions


core/src/main/java/org/apache/calcite/sql/type/MultisetSqlType.java (1 line):
	- line 66: // TODO jvs 2-Dec-2004:  This gives each multiset type its


core/src/main/java/org/apache/calcite/util/ChunkList.java (1 line):
	- line 399: // FIXME We create a new chunk, but the next chunk might be


geode/src/main/java/org/apache/calcite/adapter/geode/util/JavaTypeFactoryExtImpl.java (1 line):
	- line 55: // FIXME: watch out for recursion


core/src/main/java/org/apache/calcite/interpreter/JaninoRexCompiler.java (1 line):
	- line 103: SqlConformanceEnum.DEFAULT; // TODO: get this from implementor


cassandra/src/main/java/org/apache/calcite/adapter/cassandra/CassandraRules.java (1 line):
	- line 192: // FIXME Ignore casts for new and assume they aren't really necessary


core/src/main/java/org/apache/calcite/util/ReflectiveVisitDispatcher.java (1 line):
	- line 31: * <p>TODO: obsolete {@link ReflectUtil#lookupVisitMethod}, and use caching in


core/src/main/java/org/apache/calcite/rel/rules/JoinAssociateRule.java (1 line):
	- line 98: // FIXME Enable this rule for joins with system fields


core/src/main/java/org/apache/calcite/rel/core/RepeatUnion.java (1 line):
	- line 89: // TODO implement a more accurate row count?


core/src/main/java/org/apache/calcite/interpreter/Bindables.java (1 line):
	- line 309: throw new UnsupportedOperationException(); // TODO:


core/src/main/java/org/apache/calcite/plan/RexImplicationChecker.java (1 line):
	- line 266: // TODO: CheckSupport should not allow this exception to be thrown


core/src/main/java/org/apache/calcite/runtime/Matcher.java (1 line):
	- line 160: // TODO add strategy


core/src/main/java/org/apache/calcite/util/NumberUtil.java (1 line):
	- line 47: // TODO: DecimalFormat uses ROUND_HALF_EVEN, not ROUND_HALF_UP


core/src/main/java/org/apache/calcite/sql/SqlProcedureCallOperator.java (1 line):
	- line 41: // TODO jvs 18-Jan-2005:  rewrite to SELECT * FROM TABLE f(x)


core/src/main/java/org/apache/calcite/sql/parser/SqlParserUtil.java (1 line):
	- line 428: // PostgreSQL); TODO: require time fields except in Babel's lenient mode


core/src/main/java/org/apache/calcite/sql/fun/SqlRowOperator.java (1 line):
	- line 33: * <p>TODO: describe usage for row-value construction and row-type construction


core/src/main/java/org/apache/calcite/rel/core/TableFunctionScan.java (1 line):
	- line 196: // UNION ALL.  TODO jvs 10-Sep-2007: UDX-supplied costing metadata.


core/src/main/java/org/apache/calcite/rel/rules/materialize/MaterializedViewRule.java (1 line):
	- line 221: // TODO: Filtering of relevant materializations can be improved to be more fine-grained.


core/src/main/java/org/apache/calcite/sql/type/ExtraSqlTypes.java (1 line):
	- line 47: int GEOMETRY = 2015; // TODO: confirm


core/src/main/java/org/apache/calcite/plan/RelOptNode.java (1 line):
	- line 64: // TODO: We don't want to require that nodes have very detailed row type. It


core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableTableFunctionScan.java (1 line):
	- line 107: @SuppressWarnings("unused") Prefer pref) { // TODO: remove or use


core/src/main/java/org/apache/calcite/plan/CommonRelSubExprRule.java (1 line):
	- line 25: // TODO: obsolete this?


arrow/src/main/java/org/apache/calcite/adapter/arrow/ArrowTranslator.java (1 line):
	- line 185: // FIXME This will not work in all cases (for example, we ignore string encoding)


core/src/main/java/org/apache/calcite/schema/impl/StarTable.java (1 line):
	- line 63: // TODO: we'll also need a list of join conditions between tables. For now


core/src/main/java/org/apache/calcite/rel/rules/MeasureRules.java (1 line):
	- line 175: // TODO rename field and class


core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableTableSpool.java (1 line):
	- line 66: // TODO for the moment only LAZY read & write is supported


core/src/main/java/org/apache/calcite/rel/metadata/RelMdMinRowCount.java (1 line):
	- line 170: // FIXME This is a short-term fix for [CALCITE-1018]. A complete


core/src/main/java/org/apache/calcite/rel/rules/ReduceDecimalsRule.java (1 line):
	- line 541: // TODO: make a validator exception for this


core/src/main/java/org/apache/calcite/sql/type/SameOperandTypeChecker.java (1 line):
	- line 148: throw new UnsupportedOperationException(); // TODO:


core/src/main/java/org/apache/calcite/rex/RexCallBinding.java (1 line):
	- line 118: // TODO: Is it possible to have more than one RelFieldCollation for a RexInputRef?


bom/build.gradle.kts (1 line):
	- line 166: // TODO: https://issues.apache.org/jira/browse/CALCITE-4862


core/src/main/java/org/apache/calcite/util/ReflectUtil.java (1 line):
	- line 617: // TODO: think about arrays (e.g. int[] and String[])


core/src/main/java/org/apache/calcite/sql/type/AssignableOperandTypeChecker.java (1 line):
	- line 75: // TODO: add in unresolved function type cast.


core/src/main/java/org/apache/calcite/sql/fun/SqlPositionFunction.java (1 line):
	- line 35: // FIXME jvs 25-Jan-2009:  POSITION should verify that


core/src/main/java/org/apache/calcite/rel/externalize/RelXmlWriter.java (1 line):
	- line 42: // TODO jvs 23-Dec-2005:  honor detail level.  The current inheritance


core/src/main/java/org/apache/calcite/rel/mutable/MutableTableFunctionScan.java (1 line):
	- line 91: // TODO Auto-generated method stub


spark/src/main/java/org/apache/calcite/adapter/spark/EnumerableToSparkConverter.java (1 line):
	- line 80: final Expression source = null; // TODO: