package risinglight.rowset

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Checksum of a block.

• BlockChecksum.ChecksumType checksum_type = 1

• uint64 checksum = 2

Used in: BlockChecksum

• None = 0

• CRC32 = 1

Index of a block, which contains necessary information to identify what's inside a block.

• uint64 offset = 2

  Block offset (in bytes) in the `.col` file.

• uint64 length = 3

  Block length (in bytes).

• uint32 first_rowid = 4

  RowID of the first item in the block.

• uint32 row_count = 5

  Total count of rows in the block.

• bytes first_key = 6

  First key in the block. Only used in sorted index.

• repeated BlockStatistics stats = 7

  Statistics of the block.

• bool is_first_key_null = 8

  If first_key is null

Type of the current block. The type is stored in block header, and won't be stored in BlockIndex.

• Plain = 0

• RunLength = 1

• ZstdCompress = 2

• PlainNullable = 3

• PlainFixedChar = 4

• PlainVarchar = 5

• RleNullable = 6

• RleFixedChar = 7

• RleVarchar = 8

• Dictionary = 9

• DictNullable = 10

• DictFixedChar = 11

• DictVarchar = 12

• PlainNullableFixedChar = 13

• PlainNullableVarchar = 14

• RleNullableFixedChar = 15

• RleNullableVarchar = 16

• DictNullableFixedChar = 17

• DictNullableVarchar = 18

Statistics of a block.

Used in: BlockIndex

• BlockStatistics.BlockStatisticsType block_stat_type = 1

• bytes body = 2

  Encoded data of the aggregated value. Generally, it should be an encoded `DataValue`.

Description and usage of each statistics is described in `statistics.rs`.

Used in: BlockStatistics

• RowCount = 0

• DistinctValue = 1

An entry of a delete record.

• uint32 row_id = 2