{
  "schemaVersion": 1,
  "recordedAt": "2026-09-12T23:17:09.118936+00:00",
  "writers": {
    "spark": "3.5.6",
    "iceberg": "1.9.2",
    "delta": "3.3.2"
  },
  "oracle": "Polars 1.44.1 / PyArrow 25.0.1",
  "scope": "Local Hadoop Iceberg catalog and path-based Delta, copy-on-write operations, Delta name column mapping enabled from table creation. No REST catalog, CDF, merge-on-read or generic browser table execution.",
  "originalLocations": {
    "iceberg": "file:///var/folders/sh/6ynfpx_s4j1cd_s7rrtdx2040000gn/T/columnar-paired-history-fk28pylh/warehouse/default/history",
    "delta": "file:///var/folders/sh/6ynfpx_s4j1cd_s7rrtdx2040000gn/T/columnar-paired-history-fk28pylh/delta"
  },
  "steps": [
    {
      "family": "iceberg",
      "operation": "create",
      "version": "3124721227398476787",
      "root": "iceberg/metadata/v2.metadata.json",
      "commands": [
        "INSERT INTO lab.default.history VALUES (1,'south',10),(2,'north',20),(3,'south',30),(4,'north',40),(5,'south',50),(6,'north',60),(7,'south',70),(8,'north',80)"
      ],
      "query": "SELECT * FROM lab.default.history ORDER BY id",
      "rows": [
        {
          "id": 1,
          "category": "south",
          "score": 10
        },
        {
          "id": 2,
          "category": "north",
          "score": 20
        },
        {
          "id": 3,
          "category": "south",
          "score": 30
        },
        {
          "id": 4,
          "category": "north",
          "score": 40
        },
        {
          "id": 5,
          "category": "south",
          "score": 50
        },
        {
          "id": 6,
          "category": "north",
          "score": 60
        },
        {
          "id": 7,
          "category": "south",
          "score": 70
        },
        {
          "id": 8,
          "category": "north",
          "score": 80
        }
      ],
      "fields": [
        {
          "name": "id",
          "id": 1
        },
        {
          "name": "category",
          "id": 2
        },
        {
          "name": "score",
          "id": 3
        }
      ],
      "protocol": {
        "formatVersion": 2
      },
      "files": [
        {
          "path": "iceberg/data/00000-0-706440cd-27c2-4433-8aac-f2b6b42c9207-0-00001.parquet",
          "size": 1061,
          "sha256": "d5efd37a769442eabfe6cb87b1195ce586fd926b3eb7ffe4b3b0fd564d28d28e"
        }
      ],
      "dependencies": [
        "iceberg/metadata/v2.metadata.json",
        "iceberg/metadata/snap-3124721227398476787-1-c51aab01-5603-4670-9ac7-a7f04e401102.avro",
        "iceberg/metadata/c51aab01-5603-4670-9ac7-a7f04e401102-m0.avro"
      ]
    },
    {
      "family": "delta",
      "operation": "create",
      "version": "1",
      "root": "delta/_delta_log/00000000000000000001.json",
      "commands": [
        "INSERT INTO delta.`<workspace>/delta` VALUES (1,'south',10),(2,'north',20),(3,'south',30),(4,'north',40),(5,'south',50),(6,'north',60),(7,'south',70),(8,'north',80)"
      ],
      "query": "SELECT * FROM delta.`<workspace>/delta` ORDER BY id",
      "rows": [
        {
          "id": 1,
          "category": "south",
          "score": 10
        },
        {
          "id": 2,
          "category": "north",
          "score": 20
        },
        {
          "id": 3,
          "category": "south",
          "score": 30
        },
        {
          "id": 4,
          "category": "north",
          "score": 40
        },
        {
          "id": 5,
          "category": "south",
          "score": 50
        },
        {
          "id": 6,
          "category": "north",
          "score": 60
        },
        {
          "id": 7,
          "category": "south",
          "score": 70
        },
        {
          "id": 8,
          "category": "north",
          "score": 80
        }
      ],
      "fields": [
        {
          "name": "id",
          "id": 1,
          "physicalName": "col-3ef1f681-8190-44ee-b0d6-be194603f417"
        },
        {
          "name": "category",
          "id": 2,
          "physicalName": "col-caaa0922-dcdf-418a-b17c-c6749d96593f"
        },
        {
          "name": "score",
          "id": 3,
          "physicalName": "col-0702c016-a016-400b-ab07-3972fa61525e"
        }
      ],
      "protocol": {
        "minReaderVersion": 2,
        "minWriterVersion": 5
      },
      "files": [
        {
          "path": "delta/part-00000-7b3fac55-0b44-4d98-9243-b1255e3ff1f7-c000.snappy.parquet",
          "size": 1800,
          "sha256": "bc146600b1f644a482fae87432f26fd6d24e5db86bdc1b270154927e01642f91"
        }
      ],
      "dependencies": [
        "delta/_delta_log/00000000000000000000.json",
        "delta/_delta_log/00000000000000000001.json"
      ]
    },
    {
      "family": "iceberg",
      "operation": "append",
      "version": "2878365370051537614",
      "root": "iceberg/metadata/v3.metadata.json",
      "commands": [
        "INSERT INTO lab.default.history VALUES (9,'south',90),(10,'north',100),(11,'south',110),(12,'north',120)"
      ],
      "query": "SELECT * FROM lab.default.history ORDER BY id",
      "rows": [
        {
          "id": 1,
          "category": "south",
          "score": 10
        },
        {
          "id": 2,
          "category": "north",
          "score": 20
        },
        {
          "id": 3,
          "category": "south",
          "score": 30
        },
        {
          "id": 4,
          "category": "north",
          "score": 40
        },
        {
          "id": 5,
          "category": "south",
          "score": 50
        },
        {
          "id": 6,
          "category": "north",
          "score": 60
        },
        {
          "id": 7,
          "category": "south",
          "score": 70
        },
        {
          "id": 8,
          "category": "north",
          "score": 80
        },
        {
          "id": 9,
          "category": "south",
          "score": 90
        },
        {
          "id": 10,
          "category": "north",
          "score": 100
        },
        {
          "id": 11,
          "category": "south",
          "score": 110
        },
        {
          "id": 12,
          "category": "north",
          "score": 120
        }
      ],
      "fields": [
        {
          "name": "id",
          "id": 1
        },
        {
          "name": "category",
          "id": 2
        },
        {
          "name": "score",
          "id": 3
        }
      ],
      "protocol": {
        "formatVersion": 2
      },
      "files": [
        {
          "path": "iceberg/data/00000-0-706440cd-27c2-4433-8aac-f2b6b42c9207-0-00001.parquet",
          "size": 1061,
          "sha256": "d5efd37a769442eabfe6cb87b1195ce586fd926b3eb7ffe4b3b0fd564d28d28e"
        },
        {
          "path": "iceberg/data/00000-11-8ca52f43-4e6b-4efa-9151-45cc14c0769a-0-00001.parquet",
          "size": 1036,
          "sha256": "7992440d54b9d825256379add2781a3e0987273698052f20459516eff53cfee8"
        }
      ],
      "dependencies": [
        "iceberg/metadata/v3.metadata.json",
        "iceberg/metadata/snap-2878365370051537614-1-bce3ddee-595b-4d85-b309-aab98dd54f76.avro",
        "iceberg/metadata/bce3ddee-595b-4d85-b309-aab98dd54f76-m0.avro",
        "iceberg/metadata/c51aab01-5603-4670-9ac7-a7f04e401102-m0.avro"
      ]
    },
    {
      "family": "delta",
      "operation": "append",
      "version": "2",
      "root": "delta/_delta_log/00000000000000000002.json",
      "commands": [
        "INSERT INTO delta.`<workspace>/delta` VALUES (9,'south',90),(10,'north',100),(11,'south',110),(12,'north',120)"
      ],
      "query": "SELECT * FROM delta.`<workspace>/delta` ORDER BY id",
      "rows": [
        {
          "id": 1,
          "category": "south",
          "score": 10
        },
        {
          "id": 2,
          "category": "north",
          "score": 20
        },
        {
          "id": 3,
          "category": "south",
          "score": 30
        },
        {
          "id": 4,
          "category": "north",
          "score": 40
        },
        {
          "id": 5,
          "category": "south",
          "score": 50
        },
        {
          "id": 6,
          "category": "north",
          "score": 60
        },
        {
          "id": 7,
          "category": "south",
          "score": 70
        },
        {
          "id": 8,
          "category": "north",
          "score": 80
        },
        {
          "id": 9,
          "category": "south",
          "score": 90
        },
        {
          "id": 10,
          "category": "north",
          "score": 100
        },
        {
          "id": 11,
          "category": "south",
          "score": 110
        },
        {
          "id": 12,
          "category": "north",
          "score": 120
        }
      ],
      "fields": [
        {
          "name": "id",
          "id": 1,
          "physicalName": "col-3ef1f681-8190-44ee-b0d6-be194603f417"
        },
        {
          "name": "category",
          "id": 2,
          "physicalName": "col-caaa0922-dcdf-418a-b17c-c6749d96593f"
        },
        {
          "name": "score",
          "id": 3,
          "physicalName": "col-0702c016-a016-400b-ab07-3972fa61525e"
        }
      ],
      "protocol": {
        "minReaderVersion": 2,
        "minWriterVersion": 5
      },
      "files": [
        {
          "path": "delta/part-00000-5e6a1e37-40f2-4398-914f-88f21f8189ab-c000.snappy.parquet",
          "size": 1748,
          "sha256": "f9ec870a7dd28d33d52ac7cef0214dc7ebbc9bbf37ab41962836f9709ad9582d"
        },
        {
          "path": "delta/part-00000-7b3fac55-0b44-4d98-9243-b1255e3ff1f7-c000.snappy.parquet",
          "size": 1800,
          "sha256": "bc146600b1f644a482fae87432f26fd6d24e5db86bdc1b270154927e01642f91"
        }
      ],
      "dependencies": [
        "delta/_delta_log/00000000000000000000.json",
        "delta/_delta_log/00000000000000000001.json",
        "delta/_delta_log/00000000000000000002.json"
      ]
    },
    {
      "family": "iceberg",
      "operation": "update-delete",
      "version": "3280043265753418937",
      "root": "iceberg/metadata/v5.metadata.json",
      "commands": [
        "UPDATE lab.default.history SET score=score+7 WHERE id=3",
        "DELETE FROM lab.default.history WHERE id=9"
      ],
      "query": "SELECT * FROM lab.default.history ORDER BY id",
      "rows": [
        {
          "id": 1,
          "category": "south",
          "score": 10
        },
        {
          "id": 2,
          "category": "north",
          "score": 20
        },
        {
          "id": 3,
          "category": "south",
          "score": 37
        },
        {
          "id": 4,
          "category": "north",
          "score": 40
        },
        {
          "id": 5,
          "category": "south",
          "score": 50
        },
        {
          "id": 6,
          "category": "north",
          "score": 60
        },
        {
          "id": 7,
          "category": "south",
          "score": 70
        },
        {
          "id": 8,
          "category": "north",
          "score": 80
        },
        {
          "id": 10,
          "category": "north",
          "score": 100
        },
        {
          "id": 11,
          "category": "south",
          "score": 110
        },
        {
          "id": 12,
          "category": "north",
          "score": 120
        }
      ],
      "fields": [
        {
          "name": "id",
          "id": 1
        },
        {
          "name": "category",
          "id": 2
        },
        {
          "name": "score",
          "id": 3
        }
      ],
      "protocol": {
        "formatVersion": 2
      },
      "files": [
        {
          "path": "iceberg/data/00000-25-7df2a031-cb6a-4a81-9eab-e77363b957a5-0-00001.parquet",
          "size": 1098,
          "sha256": "4cf5928ff9b0c641112678e217158e1e9be7452e2e80a173f137996745ea9e9e"
        },
        {
          "path": "iceberg/data/00000-29-cde18156-06fb-47a8-9ac7-9eebeafe6359-0-00001.parquet",
          "size": 1066,
          "sha256": "1c559c40ed8499f678a1281c3cd8ebe8cf3140daa18fde09dbf318a0020a4542"
        }
      ],
      "dependencies": [
        "iceberg/metadata/v5.metadata.json",
        "iceberg/metadata/snap-3280043265753418937-1-df6358e3-f68b-4941-aa63-3527496df4cb.avro",
        "iceberg/metadata/df6358e3-f68b-4941-aa63-3527496df4cb-m1.avro",
        "iceberg/metadata/c1abc745-f3dc-4797-a380-f354c0aaa8da-m1.avro",
        "iceberg/metadata/df6358e3-f68b-4941-aa63-3527496df4cb-m0.avro"
      ]
    },
    {
      "family": "delta",
      "operation": "update-delete",
      "version": "4",
      "root": "delta/_delta_log/00000000000000000004.json",
      "commands": [
        "UPDATE delta.`<workspace>/delta` SET score=score+7 WHERE id=3",
        "DELETE FROM delta.`<workspace>/delta` WHERE id=9"
      ],
      "query": "SELECT * FROM delta.`<workspace>/delta` ORDER BY id",
      "rows": [
        {
          "id": 1,
          "category": "south",
          "score": 10
        },
        {
          "id": 2,
          "category": "north",
          "score": 20
        },
        {
          "id": 3,
          "category": "south",
          "score": 37
        },
        {
          "id": 4,
          "category": "north",
          "score": 40
        },
        {
          "id": 5,
          "category": "south",
          "score": 50
        },
        {
          "id": 6,
          "category": "north",
          "score": 60
        },
        {
          "id": 7,
          "category": "south",
          "score": 70
        },
        {
          "id": 8,
          "category": "north",
          "score": 80
        },
        {
          "id": 10,
          "category": "north",
          "score": 100
        },
        {
          "id": 11,
          "category": "south",
          "score": 110
        },
        {
          "id": 12,
          "category": "north",
          "score": 120
        }
      ],
      "fields": [
        {
          "name": "id",
          "id": 1,
          "physicalName": "col-3ef1f681-8190-44ee-b0d6-be194603f417"
        },
        {
          "name": "category",
          "id": 2,
          "physicalName": "col-caaa0922-dcdf-418a-b17c-c6749d96593f"
        },
        {
          "name": "score",
          "id": 3,
          "physicalName": "col-0702c016-a016-400b-ab07-3972fa61525e"
        }
      ],
      "protocol": {
        "minReaderVersion": 2,
        "minWriterVersion": 5
      },
      "files": [
        {
          "path": "delta/part-00000-1e535b8e-edaa-44fe-8f97-76519a8ae3c8-c000.snappy.parquet",
          "size": 1800,
          "sha256": "d54f724451f16f547437ff634d93dac2e466f3fa620d40b83e54888e6bb6c954"
        },
        {
          "path": "delta/part-00000-4dd9bbdd-cff4-4987-84a5-10e3beea566d-c000.snappy.parquet",
          "size": 1738,
          "sha256": "be5cd054c8a4a2cdeb6f0069529fd84ab7b4deefcefc7d4cc1677296eb618eb9"
        }
      ],
      "dependencies": [
        "delta/_delta_log/00000000000000000000.json",
        "delta/_delta_log/00000000000000000001.json",
        "delta/_delta_log/00000000000000000002.json",
        "delta/_delta_log/00000000000000000003.json",
        "delta/_delta_log/00000000000000000004.json"
      ]
    },
    {
      "family": "iceberg",
      "operation": "compact",
      "version": "7946738146742953327",
      "root": "iceberg/metadata/v6.metadata.json",
      "commands": [
        "CALL lab.system.rewrite_data_files(table=>'default.history', options=>map('rewrite-all','true'))"
      ],
      "query": "SELECT * FROM lab.default.history ORDER BY id",
      "rows": [
        {
          "id": 1,
          "category": "south",
          "score": 10
        },
        {
          "id": 2,
          "category": "north",
          "score": 20
        },
        {
          "id": 3,
          "category": "south",
          "score": 37
        },
        {
          "id": 4,
          "category": "north",
          "score": 40
        },
        {
          "id": 5,
          "category": "south",
          "score": 50
        },
        {
          "id": 6,
          "category": "north",
          "score": 60
        },
        {
          "id": 7,
          "category": "south",
          "score": 70
        },
        {
          "id": 8,
          "category": "north",
          "score": 80
        },
        {
          "id": 10,
          "category": "north",
          "score": 100
        },
        {
          "id": 11,
          "category": "south",
          "score": 110
        },
        {
          "id": 12,
          "category": "north",
          "score": 120
        }
      ],
      "fields": [
        {
          "name": "id",
          "id": 1
        },
        {
          "name": "category",
          "id": 2
        },
        {
          "name": "score",
          "id": 3
        }
      ],
      "protocol": {
        "formatVersion": 2
      },
      "files": [
        {
          "path": "iceberg/data/00000-51-89ea6294-d001-4ec0-bff2-ccb07a3f0592-0-00001.parquet",
          "size": 1117,
          "sha256": "b08a2d5925774e98e0d377d96871bffc985d07812f47894dcc31994b5df52429"
        }
      ],
      "dependencies": [
        "iceberg/metadata/v6.metadata.json",
        "iceberg/metadata/snap-7946738146742953327-1-2ed4b32b-259d-4423-b144-03fb1763c6be.avro",
        "iceberg/metadata/2ed4b32b-259d-4423-b144-03fb1763c6be-m2.avro",
        "iceberg/metadata/2ed4b32b-259d-4423-b144-03fb1763c6be-m1.avro",
        "iceberg/metadata/2ed4b32b-259d-4423-b144-03fb1763c6be-m0.avro"
      ]
    },
    {
      "family": "delta",
      "operation": "compact",
      "version": "5",
      "root": "delta/_delta_log/00000000000000000005.json",
      "commands": [
        "OPTIMIZE delta.`<workspace>/delta`"
      ],
      "query": "SELECT * FROM delta.`<workspace>/delta` ORDER BY id",
      "rows": [
        {
          "id": 1,
          "category": "south",
          "score": 10
        },
        {
          "id": 2,
          "category": "north",
          "score": 20
        },
        {
          "id": 3,
          "category": "south",
          "score": 37
        },
        {
          "id": 4,
          "category": "north",
          "score": 40
        },
        {
          "id": 5,
          "category": "south",
          "score": 50
        },
        {
          "id": 6,
          "category": "north",
          "score": 60
        },
        {
          "id": 7,
          "category": "south",
          "score": 70
        },
        {
          "id": 8,
          "category": "north",
          "score": 80
        },
        {
          "id": 10,
          "category": "north",
          "score": 100
        },
        {
          "id": 11,
          "category": "south",
          "score": 110
        },
        {
          "id": 12,
          "category": "north",
          "score": 120
        }
      ],
      "fields": [
        {
          "name": "id",
          "id": 1,
          "physicalName": "col-3ef1f681-8190-44ee-b0d6-be194603f417"
        },
        {
          "name": "category",
          "id": 2,
          "physicalName": "col-caaa0922-dcdf-418a-b17c-c6749d96593f"
        },
        {
          "name": "score",
          "id": 3,
          "physicalName": "col-0702c016-a016-400b-ab07-3972fa61525e"
        }
      ],
      "protocol": {
        "minReaderVersion": 2,
        "minWriterVersion": 5
      },
      "files": [
        {
          "path": "delta/part-00000-c68fa54e-9bff-4c2f-aca3-986d41aa9161-c000.snappy.parquet",
          "size": 1835,
          "sha256": "ed13166adf16d11480006420ad69f5deca1ea011a9c127d6c243261e7957dfaa"
        }
      ],
      "dependencies": [
        "delta/_delta_log/00000000000000000000.json",
        "delta/_delta_log/00000000000000000001.json",
        "delta/_delta_log/00000000000000000002.json",
        "delta/_delta_log/00000000000000000003.json",
        "delta/_delta_log/00000000000000000004.json",
        "delta/_delta_log/00000000000000000005.json"
      ]
    },
    {
      "family": "iceberg",
      "operation": "rename",
      "version": "7946738146742953327",
      "root": "iceberg/metadata/v7.metadata.json",
      "commands": [
        "ALTER TABLE lab.default.history RENAME COLUMN score TO reading"
      ],
      "query": "SELECT * FROM lab.default.history ORDER BY id",
      "rows": [
        {
          "id": 1,
          "category": "south",
          "reading": 10
        },
        {
          "id": 2,
          "category": "north",
          "reading": 20
        },
        {
          "id": 3,
          "category": "south",
          "reading": 37
        },
        {
          "id": 4,
          "category": "north",
          "reading": 40
        },
        {
          "id": 5,
          "category": "south",
          "reading": 50
        },
        {
          "id": 6,
          "category": "north",
          "reading": 60
        },
        {
          "id": 7,
          "category": "south",
          "reading": 70
        },
        {
          "id": 8,
          "category": "north",
          "reading": 80
        },
        {
          "id": 10,
          "category": "north",
          "reading": 100
        },
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