[client-v2, jdbc-v2] Lazy String instantiation, Read bytes to buffer first by chernser · Pull Request #2813 · ClickHouse/clickhouse-java

chernser · 2026-03-31T21:09:01Z

Summary

Closes #2263
Closes #2558
Closes #2608

Checklist

Delete items not relevant to your PR:

Closes #
Unit and integration tests covering the common scenarios were added
A human-readable description of the changes was provided to include in CHANGELOG
For significant changes, documentation in https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials

chernser · 2026-04-09T18:48:52Z

This implementation is bad. Closing PR.

…ing with typehinting

github-actions · 2026-04-09T19:28:12Z

Client V2 Coverage

Coverage Report

Package	Coverage	Lines Covered	Total Lines
com.clickhouse.client.api	82.70%	913	1104
com.clickhouse.client.api.command	46.43%	13	28
com.clickhouse.client.api.data_formats	40.29%	141	350
com.clickhouse.client.api.data_formats.internal	73.88%	1686	2282
com.clickhouse.client.api.enums	100.00%	5	5
com.clickhouse.client.api.http	0.00%		1
com.clickhouse.client.api.insert	85.15%	86	101
com.clickhouse.client.api.internal	80.31%	971	1209
com.clickhouse.client.api.metadata	90.74%	49	54
com.clickhouse.client.api.metrics	93.75%	75	80
com.clickhouse.client.api.query	78.88%	127	161
com.clickhouse.client.api.serde	84.21%	48	57
com.clickhouse.client.api.sql	87.50%	28	32
com.clickhouse.client.api.transport	89.29%	50	56

Class Coverage

Class	Coverage	Lines Covered	Total Lines
com.clickhouse.client.api.ClickHouseException	85.71%	12	14
com.clickhouse.client.api.Client	84.75%	378	446
com.clickhouse.client.api.Client.Builder	80.37%	176	219
com.clickhouse.client.api.Client.new DataStreamWriter() {...}	100.00%	8	8
com.clickhouse.client.api.ClientConfigProperties	93.37%	183	196
com.clickhouse.client.api.ClientConfigProperties.new ClientConfigProperties() {...}	100.00%	8	8
com.clickhouse.client.api.ClientException	100.00%	4	4
com.clickhouse.client.api.ClientFaultCause	100.00%	7	7
com.clickhouse.client.api.ClientMisconfigurationException	50.00%	2	4
com.clickhouse.client.api.command.CommandResponse	47.06%	8	17
com.clickhouse.client.api.command.CommandSettings	45.45%	5	11
com.clickhouse.client.api.ConnectionInitiationException	50.00%	3	6
com.clickhouse.client.api.ConnectionReuseStrategy	100.00%	3	3
com.clickhouse.client.api.data_formats.internal.AbstractBinaryFormatReader	73.25%	304	415
com.clickhouse.client.api.data_formats.internal.AbstractBinaryFormatReader.RecordWrapper	50.00%	17	34
com.clickhouse.client.api.data_formats.internal.BinaryReaderBackedRecord	14.77%	13	88
com.clickhouse.client.api.data_formats.internal.BinaryStreamReader	83.37%	381	457
com.clickhouse.client.api.data_formats.internal.BinaryStreamReader.ArrayValue	81.40%	35	43
com.clickhouse.client.api.data_formats.internal.BinaryStreamReader.BinaryStringImpl	100.00%	21	21
com.clickhouse.client.api.data_formats.internal.BinaryStreamReader.CachingByteBufferAllocator	100.00%	8	8
com.clickhouse.client.api.data_formats.internal.BinaryStreamReader.DefaultByteBufferAllocator	100.00%	2	2
com.clickhouse.client.api.data_formats.internal.BinaryStreamReader.EnumValue	80.00%	8	10
com.clickhouse.client.api.data_formats.internal.InetAddressConverter	66.67%	18	27
com.clickhouse.client.api.data_formats.internal.MapBackedRecord	45.54%	102	224
com.clickhouse.client.api.data_formats.internal.NumberConverter	86.81%	79	91
com.clickhouse.client.api.data_formats.internal.NumberConverter.NumberType	100.00%	7	7
com.clickhouse.client.api.data_formats.internal.ProcessParser	82.50%	33	40
com.clickhouse.client.api.data_formats.internal.SerializerUtils	82.22%	578	703
com.clickhouse.client.api.data_formats.internal.SerializerUtils.DynamicClassLoader	100.00%	3	3
com.clickhouse.client.api.data_formats.internal.ValueConverters	70.64%	77	109
com.clickhouse.client.api.data_formats.NativeFormatReader	80.77%	42	52
com.clickhouse.client.api.data_formats.NativeFormatReader.Block	66.67%	12	18
com.clickhouse.client.api.data_formats.RowBinaryFormatReader	15.79%	3	19
com.clickhouse.client.api.data_formats.RowBinaryFormatSerializer	19.82%	22	111
com.clickhouse.client.api.data_formats.RowBinaryFormatWriter	27.84%	27	97
com.clickhouse.client.api.data_formats.RowBinaryFormatWriter.InputStreamHolder	0.00%		4
com.clickhouse.client.api.data_formats.RowBinaryFormatWriter.ReaderHolder	0.00%		4
com.clickhouse.client.api.data_formats.RowBinaryWithNamesAndTypesFormatReader	100.00%	22	22
com.clickhouse.client.api.data_formats.RowBinaryWithNamesFormatReader	56.52%	13	23
com.clickhouse.client.api.DataStreamWriter	0.00%		1
com.clickhouse.client.api.DataTransferException	50.00%	2	4
com.clickhouse.client.api.DataTypeUtils	52.50%	63	120
com.clickhouse.client.api.enums.Protocol	100.00%	2	2
com.clickhouse.client.api.enums.ProxyType	100.00%	3	3
com.clickhouse.client.api.http.ClickHouseHttpProto	0.00%		1
com.clickhouse.client.api.insert.InsertResponse	52.94%	9	17
com.clickhouse.client.api.insert.InsertSettings	91.67%	77	84
com.clickhouse.client.api.internal.BaseCollectionConverter	100.00%	28	28
com.clickhouse.client.api.internal.BaseCollectionConverter.BaseArrayWriter	100.00%	6	6
com.clickhouse.client.api.internal.BaseCollectionConverter.BaseCollectionWriter	71.43%	15	21
com.clickhouse.client.api.internal.BaseCollectionConverter.BaseListWriter	100.00%	6	6
com.clickhouse.client.api.internal.BaseCollectionConverter.ListConversionState	100.00%	11	11
com.clickhouse.client.api.internal.BasicObjectsPool	0.00%		11
com.clickhouse.client.api.internal.CachingObjectsSupplier	0.00%		10
com.clickhouse.client.api.internal.ClickHouseLZ4InputStream	89.33%	67	75
com.clickhouse.client.api.internal.ClickHouseLZ4OutputStream	92.31%	60	65
com.clickhouse.client.api.internal.ClientStatisticsHolder	50.00%	7	14
com.clickhouse.client.api.internal.CommonSettings	97.14%	68	70
com.clickhouse.client.api.internal.CompressedEntity	80.00%	28	35
com.clickhouse.client.api.internal.DataTypeConverter	76.47%	91	119
com.clickhouse.client.api.internal.DataTypeConverter.ArrayAsStringWriter	100.00%	18	18
com.clickhouse.client.api.internal.DataTypeConverter.ListAsStringWriter	100.00%	16	16
com.clickhouse.client.api.internal.EnvUtils	0.00%		14
com.clickhouse.client.api.internal.Gauge	66.67%	4	6
com.clickhouse.client.api.internal.HttpAPIClientHelper	89.39%	438	490
com.clickhouse.client.api.internal.HttpAPIClientHelper.CustomSSLConnectionFactory	0.00%		9
com.clickhouse.client.api.internal.HttpAPIClientHelper.DummySSLConnectionSocketFactory	0.00%		3
com.clickhouse.client.api.internal.HttpAPIClientHelper.MeteredManagedHttpClientConnectionFactory	50.00%	7	14
com.clickhouse.client.api.internal.LZ4Entity	82.93%	34	41
com.clickhouse.client.api.internal.MapUtils	35.48%	22	62
com.clickhouse.client.api.internal.ServerSettings	0.00%		1
com.clickhouse.client.api.internal.StopWatch	66.67%	10	15
com.clickhouse.client.api.internal.TableSchemaParser	80.77%	21	26
com.clickhouse.client.api.internal.ValidationUtils	55.00%	11	20
com.clickhouse.client.api.internal.ValidationUtils.SettingsValidationException	100.00%	3	3
com.clickhouse.client.api.metadata.DefaultColumnToMethodMatchingStrategy	100.00%	13	13
com.clickhouse.client.api.metadata.NoSuchColumnException	0.00%		2
com.clickhouse.client.api.metadata.TableSchema	92.31%	36	39
com.clickhouse.client.api.metrics.ClientMetrics	100.00%	7	7
com.clickhouse.client.api.metrics.MicrometerLoader	90.91%	40	44
com.clickhouse.client.api.metrics.OperationMetrics	94.12%	16	17
com.clickhouse.client.api.metrics.ServerMetrics	100.00%	12	12
com.clickhouse.client.api.query.NullValueException	50.00%	2	4
com.clickhouse.client.api.query.QueryResponse	60.98%	25	41
com.clickhouse.client.api.query.QuerySettings	96.43%	81	84
com.clickhouse.client.api.query.QueryStatement	0.00%		4
com.clickhouse.client.api.query.Records	60.87%	14	23
com.clickhouse.client.api.query.Records.new Iterator() {...}	100.00%	5	5
com.clickhouse.client.api.serde.DataSerializationException	0.00%		6
com.clickhouse.client.api.serde.POJOSerDe	97.96%	48	49
com.clickhouse.client.api.serde.SerializerNotFoundException	0.00%		2
com.clickhouse.client.api.ServerException	100.00%	13	13
com.clickhouse.client.api.ServerException.ErrorCodes	100.00%	9	9
com.clickhouse.client.api.Session	100.00%	42	42
com.clickhouse.client.api.sql.SQLUtils	87.50%	28	32
com.clickhouse.client.api.transport.HttpEndpoint	88.00%	44	50
com.clickhouse.client.api.transport.HttpEndpoint.EndpointDetails	100.00%	6	6

github-actions · 2026-04-09T19:28:13Z

JDBC V2 Coverage

Coverage Report

Package	Coverage	Lines Covered	Total Lines
com.clickhouse.data	19.23%	5	26
com.clickhouse.jdbc	78.48%	1561	1989
com.clickhouse.jdbc.internal	88.40%	1174	1328
com.clickhouse.jdbc.internal.parser.antlr4	40.76%	6367	15619
com.clickhouse.jdbc.internal.parser.javacc	71.32%	4769	6687
com.clickhouse.jdbc.metadata	84.20%	469	557
com.clickhouse.jdbc.types	55.14%	279	506

Class Coverage

Class	Coverage	Lines Covered	Total Lines
com.clickhouse.data.Tuple	19.23%	5	26
com.clickhouse.jdbc.ClientInfoProperties	100.00%	12	12
com.clickhouse.jdbc.ConnectionImpl	89.62%	233	260
com.clickhouse.jdbc.DataSourceImpl	96.15%	25	26
com.clickhouse.jdbc.Driver	79.17%	38	48
com.clickhouse.jdbc.Driver.FrameworksDetection	90.91%	10	11
com.clickhouse.jdbc.DriverProperties	92.59%	25	27
com.clickhouse.jdbc.internal.DetachedResultSet	80.39%	332	413
com.clickhouse.jdbc.internal.ExceptionUtils	69.57%	16	23
com.clickhouse.jdbc.internal.FeatureManager	100.00%	8	8
com.clickhouse.jdbc.internal.JdbcConfiguration	94.44%	153	162
com.clickhouse.jdbc.internal.JdbcUtils	89.22%	364	408
com.clickhouse.jdbc.internal.JdbcUtils.ArrayProcessingCursor	100.00%	11	11
com.clickhouse.jdbc.internal.ParsedPreparedStatement	96.08%	49	51
com.clickhouse.jdbc.internal.ParsedStatement	93.75%	15	16
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseLexer	77.78%	28	36
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser	45.55%	4793	10522
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AliasContext	66.67%	6	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterPrivilegeContext	0.00%		44
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterStmtContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseAddColumnContext	41.67%	5	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseAddIndexContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseAddProjectionContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseAlterTypeContext	31.25%	5	16
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseAttachContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseClearColumnContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseClearIndexContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseClearProjectionContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseCommentContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseDeleteContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseDetachContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseDropColumnContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseDropIndexContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseDropPartitionContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseDropProjectionContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseFreezePartitionContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseMaterializeIndexContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseMaterializeProjectionContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseModifyCodecContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseModifyCommentContext	38.46%	5	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseModifyContext	50.00%	5	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseModifyOrderByContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseModifyRemoveContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseModifyTTLContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseMovePartitionContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseRemoveTTLContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseRenameContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseReplaceContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableClauseUpdateContext	0.00%		8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableColumnPositionContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AlterTableStmtContext	38.46%	5	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ArrayJoinClauseContext	50.00%	6	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AssignmentExprContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AssignmentExprListContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AssignmentValueContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AssignmentValuesContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AssignmentValuesEmptyContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AssignmentValuesListContext	45.45%	5	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.AttachStmtContext	33.33%	6	18
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CheckAllTablesStmtContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CheckGrantStmtContext	45.45%	5	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CheckStmtContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CheckTableStmtContext	35.71%	5	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ClusterClauseContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CodecArgExprContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CodecExprContext	0.00%		14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnAliasesContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnArgExprContext	66.67%	6	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnArgListContext	46.15%	6	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprAgrFuncWithFilterContext	38.46%	5	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprAliasContext	55.56%	5	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprAndContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprArrayAccessContext	55.56%	5	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprArrayContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprAsteriskContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprBetweenContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprCaseContext	35.71%	5	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprCast2Context	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprCastContext	45.45%	5	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprDateContext	71.43%	5	7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprExtractContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprFunctionContext	38.46%	5	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprIdentifierContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprIntervalContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprIsNullContext	55.56%	5	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprListContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprLiteralContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprNegateContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprNotContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprOrContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprParamContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprParensContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprPrecedence1Context	50.00%	5	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprPrecedence2Context	50.00%	5	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprPrecedence3Context	26.32%	5	19
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprRegexpContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprSubqueryContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprSubstringContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprTernaryOpContext	55.56%	5	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprTimestampContext	71.43%	5	7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprTrimContext	0.00%		14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprTupleAccessContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprTupleContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprWinFunctionContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnExprWinFunctionTargetContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnIdentifierContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnLambdaExprContext	40.00%	6	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnPrivilegeContext	42.86%	6	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnsClauseContext	53.85%	7	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnsExprAsteriskContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnsExprColumnContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnsExprContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnsExprSubqueryContext	0.00%		8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnTypeExprComplexContext	41.67%	5	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnTypeExprContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnTypeExprEnumContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnTypeExprNestedContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnTypeExprParamContext	55.56%	5	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ColumnTypeExprSimpleContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateDatabaseStmtContext	38.46%	5	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateDictionaryStmtContext	21.74%	5	23
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateFunctionStmtContext	33.33%	5	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateLiveViewStmtContext	0.00%		21
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateMaterializedViewStmtContext	0.00%		20
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateNamedCollectionStmtContext	27.78%	5	18
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreatePolicyStmtContext	17.24%	5	29
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreatePrivilegeContext	0.00%		24
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateProfileStmtContext	14.71%	5	34
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateQuotaStmtContext	18.52%	5	27
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateRoleStmtContext	26.32%	5	19
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateStmtContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateTableStmtContext	25.00%	5	20
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateUserStmtContext	17.86%	5	28
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CreateViewStmtContext	26.32%	5	19
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CteClauseContext	42.86%	6	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CteUnboundColContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CteUnboundColExprContext	50.00%	5	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CteUnboundColLiteralContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CteUnboundColParamContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.CteUnboundSubQueryContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DatabaseIdentifierContext	63.64%	7	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DataClauseContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DataClauseFormatContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DataClauseSelectContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DataClauseValuesContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DeleteStmtContext	42.86%	6	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DescribeStmtContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DestinationClauseContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DictionaryArgExprContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DictionaryAttrDfntContext	40.00%	6	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DictionaryEngineClauseContext	75.00%	6	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DictionaryPrimaryKeyClauseContext	46.15%	6	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DictionarySchemaClauseContext	46.15%	6	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DictionarySettingsClauseContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DropPrivilegeContext	0.00%		24
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.DropStmtContext	15.00%	6	40
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.EngineClauseContext	75.00%	6	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.EngineExprContext	46.15%	6	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.EnumValueContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ExchangeStmtContext	42.86%	6	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ExistsDatabaseStmtContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ExistsStmtContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ExistsTableStmtContext	31.25%	5	16
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ExplainStmtContext	33.33%	6	18
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.FilenameContext	0.00%		8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.FloatingLiteralContext	50.00%	6	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.FrameBetweenContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.FrameStartContext	0.00%		6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.FromClauseContext	36.84%	7	19
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.GrantStmtContext	20.69%	6	29
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.GrantTableIdentifierContext	50.00%	6	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.GroupByClauseContext	42.86%	6	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.HavingClauseContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.IdentifierContext	50.00%	6	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.IdentifierOrNullContext	66.67%	6	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.InserParameterExprContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.InsertParameterContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.InsertParameterFuncExprContext	55.56%	5	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.InsertRawValueContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.InsertStmtContext	53.33%	8	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.IntervalContext	40.00%	6	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinConstraintClauseContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinExprContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinExprCrossOpContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinExprOpContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinExprParensContext	0.00%		8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinExprTableContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinOpContext	0.00%		6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinOpCrossContext	50.00%	6	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinOpFullContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinOpInnerContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.JoinOpLeftRightContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.KeywordContext	1.89%	6	318
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.KeywordForAliasContext	2.33%	6	258
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.KillMutationStmtContext	35.71%	5	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.KillQueryStmtContext	35.71%	5	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.KillStmtContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.LayoutClauseContext	40.00%	6	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.LifetimeClauseContext	42.86%	6	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.LimitByClauseContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.LimitClauseContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.LimitExprContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.LiteralContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.MoveStmtContext	33.33%	6	18
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.NameCollectionKeyContext	50.00%	6	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.NamedQueryContext	40.00%	6	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.NestedIdentifierContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.NumberLiteralContext	40.00%	6	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.OptimizeByExprContext	30.00%	6	20
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.OptimizeStmtContext	40.00%	6	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.OrderByClauseContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.OrderExprContext	37.50%	6	16
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.OrderExprListContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.PartitionByClauseContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.PartitionClauseContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.PrewhereClauseContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.PrimaryKeyClauseContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.PrivelegeListContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.PrivilegeContext	13.64%	6	44
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ProjectionOrderByClauseContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ProjectionSelectStmtContext	0.00%		14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.QueryContext	38.24%	13	34
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.QueryStmtContext	46.67%	7	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.QuotaForClauseContext	33.33%	6	18
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.QuotaMaxExprContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.RangeClauseContext	0.00%		14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.RatioExprContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.RenameStmtContext	37.50%	6	16
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.RevokeStmtContext	26.09%	6	23
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SampleByClauseContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SampleClauseContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SchemaAsFunctionClauseContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SchemaAsTableClauseContext	71.43%	5	7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SchemaDescriptionClauseContext	45.45%	5	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SelectStmtContext	21.43%	6	28
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SelectStmtWithParensContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SelectUnionStmtContext	40.00%	6	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SetRolesListContext	63.64%	7	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SetRoleStmtContext	38.10%	8	21
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SetStmtContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SettingExprContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SettingExprListContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SettingsClauseContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowAccessStmtContext	71.43%	5	7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowClustersStmtContext	27.78%	5	18
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowClusterStmtContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowColumnsStmtContext	23.81%	5	21
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowCreatePolicyStmtContext	41.67%	5	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowCreateProfileContext	38.46%	5	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowCreateQuotaStmtContext	38.46%	5	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowCreateRoleStmtContext	41.67%	5	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowCreateStmtContext	27.78%	5	18
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowCreateUserStmtContext	38.46%	5	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowDatabasesStmtContext	0.00%		18
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowDictionariesStmtContext	26.32%	5	19
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowEnginesStmtContext	41.67%	5	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowFromDbClauseContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowFromTableFromDbClauseContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowFSCachesStmtContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowFunctionsStmtContext	45.45%	5	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowGrantsStmtContext	33.33%	5	15
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowIndexStmtContext	22.73%	5	22
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowMergesStmtContext	27.78%	5	18
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowPoliciesStmtContext	50.00%	5	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowPrivilegeContext	0.00%		25
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowProcessListStmtContext	41.67%	5	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowProfilesStmtContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowQuotasStmtContext	71.43%	5	7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowQuotaStmtContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowRolesStmtContext	55.56%	5	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowSettingsStmtContext	45.45%	5	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowSettingStmtContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowStmtContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowTablesStmtContext	23.81%	5	21
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ShowUsersStmtContext	71.43%	5	7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SourceClauseContext	42.86%	6	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SourcePrivilegeContext	0.00%		25
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SubqueryClauseContext	66.67%	6	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SystemPrivilegeContext	0.00%		81
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.SystemStmtContext	5.88%	6	102
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableArgExprContext	60.00%	6	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableArgListContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableColumnDfntContext	35.29%	6	17
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableColumnPropertyExprContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableColumnPropertyTypeContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableElementExprColumnContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableElementExprConstraintContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableElementExprContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableElementExprIndexContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableElementExprProjectionContext	0.00%		7
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableExprAliasContext	55.56%	5	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableExprContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableExprFunctionContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableExprIdentifierContext	100.00%	6	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableExprSubqueryContext	62.50%	5	8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableFunctionExprContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableIdentifierContext	80.00%	8	10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableIndexDfntContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableProjectionDfntContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TableSchemaClauseContext	83.33%	5	6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TopClauseContext	0.00%		11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TruncateStmtContext	42.86%	6	14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TtlClauseContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.TtlExprContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UndropStmtContext	50.00%	6	12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UpdateStmtContext	46.15%	6	13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UserCreateGranteesClauseContext	0.00%		19
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UserCreateHostClauseContext	0.00%		14
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UserCreateHostDefContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UserIdentifiedClauseContext	27.27%	6	22
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UserIdentifiedWithClauseContext	17.14%	6	35
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UserIdentifierContext	54.55%	6	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UseStmtContext	77.78%	7	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.UuidClauseContext	66.67%	6	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ValidUntilClauseContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ViewIdentifierContext	0.00%		8
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.ViewParamContext	63.64%	7	11
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WatchStmtContext	0.00%		12
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WhereClauseContext	66.67%	6	9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WindowClauseContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WindowExprContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WinFrameBoundContext	0.00%		13
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WinFrameClauseContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WinFrameExtendContext	0.00%		6
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WinOrderByClauseContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WinPartitionByClauseContext	0.00%		10
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParser.WithClauseContext	0.00%		9
com.clickhouse.jdbc.internal.parser.antlr4.ClickHouseParserBaseListener	64.86%	382	589
com.clickhouse.jdbc.internal.parser.javacc.AbstractCharStream	43.88%	86	196
com.clickhouse.jdbc.internal.parser.javacc.ClickHouseSqlParser	71.17%	2871	4034
com.clickhouse.jdbc.internal.parser.javacc.ClickHouseSqlParserConstants	100.00%	1	1
com.clickhouse.jdbc.internal.parser.javacc.ClickHouseSqlParserTokenManager	82.98%	1648	1986
com.clickhouse.jdbc.internal.parser.javacc.ClickHouseSqlStatement	36.05%	53	147
com.clickhouse.jdbc.internal.parser.javacc.ClickHouseSqlUtils	68.57%	24	35
com.clickhouse.jdbc.internal.parser.javacc.JdbcParseHandler	24.05%	19	79
com.clickhouse.jdbc.internal.parser.javacc.LanguageType	100.00%	6	6
com.clickhouse.jdbc.internal.parser.javacc.OperationType	100.00%	2	2
com.clickhouse.jdbc.internal.parser.javacc.ParseException	3.95%	3	76
com.clickhouse.jdbc.internal.parser.javacc.ParseHandler	50.00%	2	4
com.clickhouse.jdbc.internal.parser.javacc.SimpleCharStream	30.00%	9	30
com.clickhouse.jdbc.internal.parser.javacc.StatementType	92.50%	37	40
com.clickhouse.jdbc.internal.parser.javacc.Token	66.67%	8	12
com.clickhouse.jdbc.internal.parser.javacc.TokenMgrException	0.00%		39
com.clickhouse.jdbc.internal.SqlParserFacade	90.63%	29	32
com.clickhouse.jdbc.internal.SqlParserFacade.ANTLR4AndParamsParser	90.91%	10	11
com.clickhouse.jdbc.internal.SqlParserFacade.ANTLR4AndParamsParser.ParseStatementAndParamsListener	92.86%	13	14
com.clickhouse.jdbc.internal.SqlParserFacade.ANTLR4Parser	97.30%	36	37
com.clickhouse.jdbc.internal.SqlParserFacade.ANTLR4Parser.ParsedPreparedStatementListener	94.34%	50	53
com.clickhouse.jdbc.internal.SqlParserFacade.ANTLR4Parser.ParsedStatementListener	100.00%	15	15
com.clickhouse.jdbc.internal.SqlParserFacade.ANTLR4Parser.ParserErrorListener	100.00%	2	2
com.clickhouse.jdbc.internal.SqlParserFacade.JavaCCParser	98.53%	67	68
com.clickhouse.jdbc.internal.SqlParserFacade.SQLParser	100.00%	4	4
com.clickhouse.jdbc.JdbcV2Wrapper	100.00%	4	4
com.clickhouse.jdbc.metadata.DatabaseMetaDataImpl	81.57%	385	472
com.clickhouse.jdbc.metadata.DatabaseMetaDataImpl.TableType	100.00%	14	14
com.clickhouse.jdbc.metadata.ParameterMetaDataImpl	100.00%	23	23
com.clickhouse.jdbc.metadata.ResultSetMetaDataImpl	97.92%	47	48
com.clickhouse.jdbc.PreparedStatementImpl	77.30%	378	489
com.clickhouse.jdbc.PreparedStatementImpl.ArrayProcessingCursor	100.00%	7	7
com.clickhouse.jdbc.ResultSetImpl	82.20%	508	618
com.clickhouse.jdbc.StatementImpl	92.81%	258	278
com.clickhouse.jdbc.types.Array	88.00%	44	50
com.clickhouse.jdbc.types.ArrayResultSet	50.67%	227	448
com.clickhouse.jdbc.types.Struct	100.00%	8	8
com.clickhouse.jdbc.WriterStatementImpl	30.14%	63	209

chernser · 2026-04-10T21:11:36Z

Summary

Closes #2263
Closes #2558
Closes #2608

chernser · 2026-04-10T21:12:10Z

@claude[agent] review changes. give short summary in comment.

Claude · 2026-04-10T21:14:09Z

@claude[agent] review changes. give short summary in comment.

Review Summary

Changed: This PR adds lazy String instantiation by reading string bytes into ByteBuffers first, with opt-in BinaryString type for deferred conversion. Also includes Session API formalization, improved error messages, Variant null handling, and DNS/auth fixes.

Core Changes:

BinaryString interface with BinaryStringImpl for lazy String conversion via ByteBuffer (client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/BinaryStreamReader.java:1452-1504)
Type hint system allowing BinaryString.class to defer String allocation (client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/BinaryStreamReader.java:135-146)
Session extracted into dedicated Session class with thread-safe operations (client-v2/src/main/java/com/clickhouse/client/api/Session.java:1-100)

Compatibility Risk: MEDIUM

Breaking/High-Risk Changes:

readValue() signature changed to accept Class<?> type hint - impacts internal callers in AbstractBinaryFormatReader
Array/Map item reading now forces String.class hint instead of BinaryString - prevents unexpected type changes in collections (client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/BinaryStreamReader.java:684,867)
Variant null discriminator byte handling changed: 0xFF now treated as null (client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/BinaryStreamReader.java:916-918)
readValue() error context enhanced with row number and timing - exception messages changed
BinaryStringImpl.asBytes() throws UnsupportedOperationException for off-heap buffers - new failure mode
AbstractBinaryFormatReader.readValue() now unwraps BinaryString to String automatically - output type preserved

Issues Found:

Bug - Incorrect buffer handling in BinaryStringImpl (client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/BinaryStreamReader.java:1487-1492)
- new String(buffer.array(), ...) reads entire backing array, not just the buffer range
- Should use new String(buffer.array(), buffer.position(), buffer.remaining(), ...)
- Impact: Extra bytes or incorrect strings when buffer doesn't start at 0 or uses a slice
Inconsistency - Missing BinaryString unwrapping in readValue(String) (client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/AbstractBinaryFormatReader.java:230)
- readValue(int) unwraps BinaryString, but readValue(String) delegates without unwrapping
- Impact: Column-by-name access could return BinaryString when column-by-index returns String
Performance - Unnecessary allocation in error path (client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/AbstractBinaryFormatReader.java:260-269)
- timeSinceLastNext() called twice per exception
- Minor: Pre-calculate before constructing message

Tests: Variant null tests added and passing. No dedicated BinaryString tests visible in diff. Session tests added.

Docs: No changes to docs/features.md despite new type-hint API being user-facing in custom reader scenarios.

sonarqubecloud · 2026-04-10T21:23:17Z

Quality Gate failed

Failed conditions
77.5% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

chernser added 4 commits March 31, 2026 14:06

Implemented reading string to bytebuffers

33270ad

Merge branch 'main' into 03/31/26/store_string_as_buffer

57dfd9e

Fixed build

f9ab74c

Finalized impl. This is too complex to handle and UX will be terrible

4867db6

chernser closed this Apr 9, 2026

chernser reopened this Apr 9, 2026

Made read String as String by default. Option is to read as BinaryStr…

8724b94

…ing with typehinting

chernser added 4 commits April 9, 2026 16:13

Added ability to set custom type mapping for reader

2db49b4

fixed type mapping in jdbc

11f68f1

fixed type mapping in jdbc

74aff7d

Merge branch 'main' into 03/31/26/store_string_as_buffer

4417d4e

Claude started work on behalf of chernser April 10, 2026 21:12 View session

chernser marked this pull request as ready for review April 10, 2026 21:13

chernser requested a review from mzitnik as a code owner April 10, 2026 21:13

Claude finished work on behalf of chernser April 10, 2026 21:14

Claude started work on behalf of chernser April 10, 2026 21:15 View session

Claude finished work on behalf of chernser April 10, 2026 21:16

chernser marked this pull request as draft April 10, 2026 21:18

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[client-v2, jdbc-v2] Lazy String instantiation, Read bytes to buffer first#2813

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