TypeCHBlock is used by TiSpark and TiFlash, in this encode mode, TiFlash will encode the data using native ch block format.

Column reference.

Aggregate functions.

Mysql specific types.

Values are encoded bytes.

Window functions.

Scalar Function.

Encoded value list.

math.

encryption.

other.

String functions.

unimplemented in tidb.

Casting.

compare.

unimplemented in tidb.

info.

time.

control.

json.

unimplemented in tidb.

like.

op.

arithmetic.

miscellaneous.

Bucket is an element of histogram.

ByItem type for group by and order by.

Chunk contains multiple rows data and rows meta.

DAGRequest represents the request that will be handled with DAG mode.

ExchangeReceiver accept connection and receiver data from ExchangeSender.

ExchangeSender will build connection with ExchangeReceiver.

It represents a Executor.

Evaluators should implement evaluation functions for every expression type.

FMSketch is used to count distinct values for columns.

KeyRange is the encoded index key range, low is closed, high is open.

values are all in text format.

RowMeta contains row handle and length of a row.

Expression organized in RPN form.

SampleCollector is used for collect samples and calculate the count and ndv of an column.

Response for SelectRequest.