ParseDatetime is a helper function wrapping ParseTime with datetime type and default fsp.

ParseEnumValue creates a Enum with special number.

ParseSetValue creates a Set with special number.

ParseTimeFromInt64 parses mysql time value from int64.

PipeAsArgs takes each row of input, bind to variables in parameter code. The variables are specified via $1, $2, etc. The code is run as the command f

Push implements heap.Interface Push interface.

Read reads one record from r. The record is a slice of strings with each string representing one field.

ReplaceParent means replacing a parent with another one.

ResolveIndicesAndCorCols resolves the index for columns and initializes the correlated columns.

Round rounds the argument f to dec decimal places. dec defaults to 0 if not specified. dec can be negative to cause dec digits left of the decimal poi

RoundFrac rounds fractional seconds precision with new fsp and returns a new one. We will use the “round half up” rule, e.g, >= 0.5 -> 1, < 0.5 -> 0,

RoundFrac rounds fractional seconds precision with new fsp and returns a new one. We will use the “round half up” rule, e.g, >= 0.5 -> 1, < 0.5 -> 0,

Set if key not exists, returns whether already exists.

SetCorrelated implements Plan interface.

SetCorrelated implements Plan interface.

SetDatum sets datum to the expression.

SetLength sets the length of the datum

SetMode sets aggFunctionMode for aggregate function.

SetMysqlBit sets Bit value

SetMysqlSet sets Set value

SetProfiling profiling will generate cpu and memory profile files when the executors are completed.

SetStatusFlag sets the session server status variable. If on is ture sets the flag in session status, otherwise removes the flag.

Sha1Hash is an util function to calculate sha1 hash.

StrToUint converts a string to an unsigned interger at the best-effortt.

SubUint64 subtracts uint64 a with b and returns uint64 if no overflow error.

message contains 3 kinds of data with the formats: the first 4 bytes is int32 flag if flag > 0 actual data row bytes with length = flag else if flag =

ToInfo casts Column to model.ColumnInfo

ToString explains a Plan, returns description string.

Top streams through total n items, picking reverse ordered k items with O(n*log(k)) complexity. Required Memory: about same size as n items in memory

TotalSize hints the total size in MB for all the partitions. This is usually used when sorting is needed.

TypeStr converts tp to a string.

TypeToStr converts a field to a string. It is used for converting Text to Blob, or converting Char to Binary. Args: tp: type enum cs: charset

Union union multiple Datasets as one Dataset

Write implements io.Writer. If a write would cause the log file to be larger than MaxMegaByte, the file is closed, renamed to include a timestamp of

buildInnerApply builds apply plan with outerPlan and innerPlan, which apply inner-join for every row from outerPlan and the whole innerPlan.

See http://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_date-format

See http://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_dayofmonth

See http://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_month

See https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_now

See http://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_week

See http://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_weekday

calcWeek calculates week and year for the time.

composeConditionWithBinaryOp composes condition with binary operator into a balance deep tree, which benefits a lot for pb decoder/encoder.

concatOnAndWhereConds concatenate ON conditions with WHERE conditions.

convert2PhysicalPlanRight converts the right join to *physicalPlanInfo.

convert2PhysicalPlanSemi converts the semi join to *physicalPlanInfo.

datetimeToUint64 converts time value to integer in YYYYMMDDHHMMSS format.

decimalBinSize returns the size of array to hold a binary representation of a decimal.