{ "date": "2026-10-24", "purpose": "Correctness-enabling direct scalar ArrayList table-function result fields and atomic results; concrete List arguments retain released planning rejection; no acceleration claim.", "provenance": { "base_revision": "e5c3b4d0b378972f9405375540e2529d0dc86c89", "candidate_source_sha256": { "src/main/java/tech/streamfusion/planner/TableFunctionMatcher.java": "56b1c3f9ed5de72e351d598cbda99148f4549f2dd8354b2cb198d169138c9102", "src/test/java/tech/streamfusion/FlinkTableFunctionConversionSqlHarnessTest.java": "23f17d278f321de095851a12117752a41759406fcf19f2678d8ce7eda706ae52", "src/test/java/tech/streamfusion/ArrayListTableFunctionBenchmark.java": "d9146cbb39d12d2d378c8a301a0416c94765e029649a49a5b0528706469e1282", "src/test/java/tech/streamfusion/UdfTypeBoundaryBenchmark.java": "6972eb7e58ceb67914d6e725b60d4e2f04287c3b62f58f6bd4e49b064d3ba8aa", "src/test/java/tech/streamfusion/FlinkTypedTableFunctionSqlHarnessTest.java": "6b60ac198d3ced66b838d430917364fca25302b7e71b5836e70a2ea381ce7f62", "src/test/java/tech/streamfusion/FlinkTableFunctionIntervalListSqlHarnessTest.java": "62a550d1fb409cfa526dbba8d07dea456037caff26000acf98cdf0322beb7402", "src/test/java/tech/streamfusion/FlinkDateIntArgumentTableFunctionSqlHarnessTest.java": "caf8cd8f2af233930a24ccb0fb62d6bb3be8083d0633d3be3c11c9397361b2dc" }, "native_payload_sha256": "b574491f08427c8b128107d6286cb403421a0bafbdba7a0e5cdd8fea30562d16", "native_source_revision": "1bd9daa8d75586424f3a5d9ad7acc14d600baffb", "native_operational_sources_unchanged": true, "fixture_identity_verified": true, "previous_production_source_unchanged": true, "released_java_source_sha256": { "1.18.1": { "org/apache/flink/table/types/logical/ArrayType.java": "2ed2abb8bd9d704ad36ab41eb82f3393b9194ae90d8273273931ad4296fc0625", "org/apache/flink/table/types/logical/LogicalTypeRoot.java": "1649ace6c6c4beb49671010575b4cad01ffc08dd26e741b5808923fe9f862ac9", "org/apache/flink/table/types/logical/LogicalTypeFamily.java": "7ca3c51d84036d2e293c78be31c953013753a6f3b93adbc9a653dfd650d3b04c", "org/apache/flink/table/types/AtomicDataType.java": "4699eacf00e6cd6dd249dcbfd15a747b219c3af137f6ecbffe197721151ad694", "org/apache/flink/table/data/conversion/ArrayListConverter.java": "4e17abaca15b93192b8b356a41b9703c8ba7fe74d725c1a6ee256e67dde472cf" }, "2.2.1": { "org/apache/flink/table/types/logical/ArrayType.java": "2ed2abb8bd9d704ad36ab41eb82f3393b9194ae90d8273273931ad4296fc0625", "org/apache/flink/table/types/logical/LogicalTypeRoot.java": "3ee891ad1cd58ccbd0b9429d86589b74cb824e0d083547cda34c4ed114d81c61", "org/apache/flink/table/types/logical/LogicalTypeFamily.java": "a2b71862b2adf402eb7d87ef9ec34afcafadc4a620649024ad66df2c219e8367", "org/apache/flink/table/types/AtomicDataType.java": "4699eacf00e6cd6dd249dcbfd15a747b219c3af137f6ecbffe197721151ad694", "org/apache/flink/table/data/conversion/ArrayListConverter.java": "4e17abaca15b93192b8b356a41b9703c8ba7fe74d725c1a6ee256e67dde472cf" } } }, "configuration": { "rows": 262144, "parallelism": 1, "heap": "2g", "transpose_batch_rows": 1024, "warmup_pairs": 2, "measured_alternating_pairs": 5, "source": "Runtime Flink rows cycle 64 prebuilt arrays with scalar edge values; every thirteenth parent is NULL, every seventh other parent is empty, remaining parents have three elements including a NULL middle element. Arguments use List; results use ArrayList or the unchanged List control.", "sink": "Flink blackhole row sink", "both_perimeter_transposes": true, "local_zero_copy_exchange": false, "cluster_per_job": true, "symmetric_untimed_explain": true, "timed_boundary": "executeSql(insert).await(), including planning/submission, callbacks, container conversions, production transport and both transposes; environment setup and EXPLAIN outside timing.", "native_profile": "release, full RocksDB, mimalloc", "java": "openjdk version \"17.0.20.1\" 2026-08-18\nOpenJDK Runtime Environment (build 17.0.20.1+1-1-22.04-Ubuntu)\nOpenJDK 64-Bit Server VM (build 17.0.20.1+1-1-22.04-Ubuntu, mixed mode, sharing)", "os": "Linux-6.18.54.1-microsoft-standard-WSL2-x86_64-with-glibc2.35", "cpu": "12th Gen Intel(R) Core(TM) i7-12650H", "fixture_identity_verified": true, "previous_production_source_unchanged": true, "case_shapes": { "arraylist:INT": { "argument_bridge": "java.util.List", "result_bridge": "java.util.ArrayList", "element_type": "INT" }, "arraylist:STRING": { "argument_bridge": "java.util.List", "result_bridge": "java.util.ArrayList", "element_type": "STRING, including unpaired UTF-16 surrogates" }, "arraylist:DECIMAL(38,18)": { "argument_bridge": "java.util.List", "result_bridge": "java.util.ArrayList", "element_type": "DECIMAL(38,18)" }, "CONTROL_list:STRING": { "argument_bridge": "java.util.List", "result_bridge": "java.util.List", "element_type": "STRING, including unpaired UTF-16 surrogates" } }, "input_patterns": "Cycle 64 prebuilt arrays. Within that fixture: index%13==0 gives a NULL parent; otherwise index%7==0 gives an empty parent; all other parents have three elements with the middle element NULL. Scalar edge values repeat by seven slots. The function mutates the first element and clears the List after synchronous collection." }, "validation": { "22": [ { "test": "FlinkDateIntArgumentTableFunctionSqlHarnessTest", "tests": 21, "failures": 0, "errors": 0, "skipped": 0 }, { "test": "FlinkPrimitiveResultTableFunctionSqlHarnessTest", "tests": 133, "failures": 0, "errors": 0, "skipped": 0 }, { "test": "FlinkMixedPrimitiveTableFunctionSqlHarnessTest", "tests": 48, "failures": 0, "errors": 0, "skipped": 0 }, { "test": "FlinkTableFunctionConversionSqlHarnessTest", "tests": 82, "failures": 0, "errors": 0, "skipped": 0 }, { "test": "FlinkTableFunctionIntervalListSqlHarnessTest", "tests": 4, "failures": 0, "errors": 0, "skipped": 0 }, { "test": "FlinkNestedTableFunctionSqlHarnessTest", "tests": 61, "failures": 0, "errors": 0, "skipped": 0 }, { "test": "FlinkTypedTableFunctionSqlHarnessTest", "tests": 64, "failures": 0, "errors": 0, "skipped": 0 }, { "test": "FlinkTableFunctionSqlHarnessTest", "tests": 15, "failures": 0, "errors": 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"warmup": false, "rows": 262144, "seconds": 0.481727 } ] } ] } ], "limits": [ "Short complete-job measurements include startup and JIT variability; they do not establish sustained throughput.", "Prior production runs in a separate JVM with its own stock controls; ranges and all trials remain visible.", "No builds or tests from this goal overlap timings. Other local Java/build activity, available memory, swap, load and CPU pressure were sampled once per second; this is not an exclusive CPU reservation.", "Slower verified UDF coverage follows the accepted maintainer performance exception." ], "earlier_measurements": [ { "reason": "Initial 2.2 candidate overlapped two other Java processes. A one-time quieter 2.2 follow-up retained all trials. Subsequent review replaced the no-children scalar proxy with the explicit atomic type category, excluding zero-field ROW; the final exact-source matrix above measures that planner-only refinement. The callback and Arrow runtime did not change. 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"org.apache.flink.table.functions.TableFunction.collect", 4 ], [ "org.apache.flink.table.runtime.util.StreamRecordCollector.collect", 3 ], [ "tech.streamfusion.arrow.writers.ArrayWriter$ArrayWriterForRow.isNullAt", 2 ], [ "org.apache.arrow.vector.complex.ListVector.startNewValue", 2 ], [ "org.apache.flink.table.data.conversion.ArrayObjectArrayConverter.toJavaArray", 2 ], [ "org.apache.flink.table.data.conversion.ArrayObjectArrayConverter.toExternal", 2 ], [ "org.apache.flink.table.data.conversion.ArrayListConverter.toExternal", 2 ], [ "ColumnarJvmTableFunction$12$TableFunctionCollector$2.collect", 2 ], [ "org.apache.flink.table.runtime.collector.WrappingCollector.outputResult", 2 ], [ "org.apache.flink.table.runtime.collector.TableFunctionCollector.outputResult", 2 ], [ "java.lang.Integer.valueOf", 2 ], [ "java.util.ArrayList.clear", 1 ], [ "tech.streamfusion.arrow.ArrowConversion.createArrowReader", 1 ] ], "global_leaf": [ [ "sun.nio.ch.Net.accept", 214 ], [ "sun.nio.ch.EPoll.wait", 201 ], [ "java.io.FileInputStream.readBytes", 182 ], [ "org.apache.flink.streaming.runtime.io.RecordProcessorUtils$$Lambda$3150+0x00007ebea8dad7c0.1544176931.accept", 29 ], [ "org.apache.flink.table.data.binary.BinarySegmentUtils.allocateReuseBytes", 27 ], [ "java.lang.ThreadLocal$ThreadLocalMap.getEntryAfterMiss", 25 ], [ "org.apache.flink.table.data.binary.BinaryStringData.fromAddress", 23 ], [ "org.apache.flink.table.data.conversion.RowRowConverter.toInternal", 17 ], [ "org.apache.arrow.vector.complex.ListVector.setNull", 17 ], [ "org.apache.flink.table.data.binary.BinaryStringData.ensureMaterialized", 15 ], [ "java.util.zip.Inflater.inflateBytesBytes", 14 ], [ "tech.streamfusion.arrow.writers.IntWriter$IntWriterForRow.isNullAt", 14 ], [ "org.apache.flink.table.data.binary.BinarySection.pointTo", 10 ], [ "tech.streamfusion.arrow.writers.VarCharWriter.doWrite", 10 ], [ "org.apache.flink.table.runtime.typeutils.ArrayDataSerializer.toBinaryArray", 9 ] ], "decision": "Stop after one sixteen-second profile. 48 table-operator stacks point to the existing callback and owned Arrow writes (14 leaves in IntWriter null checks); no isolated concrete-result bridge hotspot or easy safe class-specific improvement. 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Callback/Arrow implementations and timed fixture bodies are unchanged; one profile, no optimization prototype." }, "retained_timing_trials": 784 }