AbbrDayOfMonth: Get the abbreviation of month of day.

CalcToSeconds: CalcToDays is used to return a day number (the number of days since year 0).

enum("a","b","c") -> CastIndexToValue(1) -> "a" CastIndexToValue returns enum type index according to the value.

enum("a","b","c") -> CastIndexValueToIndex(1) -> 1 CastIndexValueToIndex returns enum type index according to the index value.

CastNanoToTimestamp returns timestamp string according to the nano.

enum("a","b","c") -> CastValueToIndex("a") -> 1 CastValueToIndex returns enum type index according to the value.

DateFSP gets fsp from date string.

DateStringToDate can still speed up if vec is const.

TODO: I will support template soon.

DateTimeDiff returns t2 - t1 where t1 and t2 are datetime expressions.

DeduceNotNullable helps optimization sometimes.

FormatIntByWidth: Formatintwidthn is used to format ints with width parameter n.

HexString returns a hexadecimal string representation of a string.

TODO: may support soon.

Too confused.

evalate LOCATE(substr, str).

evalate LOCATE(substr, str, pos).

MoTableColMax return the max value of the column.

MoTableColMax return the max value of the column.

MoTableRows returns an estimated row number of a table.

MoTableSize returns an estimated size of a table.

RunFunctionDirectly runs a function directly without any protections.

SerialHelper is unified function used in builtInSerial and BuiltInSerialFull To use it inside builtInSerial, pass the bitMap pointer and set isFull false To use it inside BuiltInSerialFull, pass the bitMap as nil and set isFull to true.

https://dev.mysql.com/doc/refman/8.0/en/encryption-functions.html#function_sha2.

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Add a fault point.

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The number of days in the year 0000 AD.

Seconds in 0000 AD.

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bitmap function.

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be used: enum.

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be used: show snapshots.

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CLUSTER_CENTERS.

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||.

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COSINE_DISTANCE.

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information functionsReference to : https://dev.mysql.com/doc/refman/8.0/en/information-functions.html.

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10MB.

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/.

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=.

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EXTRACT function,such as EXTRACT(MONTH/DAY/HOUR/MINUTE/SECOND FROM p).

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FUNCTION_END_NUMBER is not a function, just a flag to record the max number of function.

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>=.

>.

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Div.

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L1_NORMALIZATION.

L2_DISTANCE.

L2 NORMALIZATION.

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Date and Time functions.

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<=.

<.

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-.

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get mo admin name of account.

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observation function.

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MO_CTL is used to check some internal status, and issue some ctl commands to the service.

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parse date from string, like __mo_filepath.

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Dump memory usage.

parse type/onUpdate/default []byte to visible string.

parse type/onUpdate/default []byte to visible string for enum.

table column max value.

table column min value.

table rows.

table size.

%.

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*.

Sequence function.

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NORMALIZE L2.

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<>.

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&.

|.

<<.

>>.

^.

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+.

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POSITION function, such as POSITION(substr IN str).

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purge mo internal log, like rawlog, statement_info, metric.

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Remove.

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24-hour seconds.

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SUB_VECTOR.

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Array Function.

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Trigger.

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UNARY_MINUS -.

UNARY_PLUS +.

UNARY_TILDE ~.

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be used: insert into t1 values(1,1) on duplicate key update a=values(a)+a+1.

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VECTOR DIMENSIONS.

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AbbrevWeekdayName lists Abbreviation of week names, which are used int builtin function 'date_format'.

19.

20.

MonthNames lists names of months, which are used in builtin function `date_format`.

ScaleTable is a lookup array for digits.

WeekdayNames lists names of weekdays, which are used in builtin function `date_format`.

Arg of Udf.

FuncNew stores all information about a function.

GeneralTime is the internal struct type for Time.

The month represents one month of the year (January=1,...).