StrToInt converts a string to an integer at the best-effort.

String force casts a []byte to a string. USE AT YOUR OWN RISK

Week returns the week value.

calcDaysInYear calculates days in one year, it works with 0 <= year <= 99.

calcTimeDiff calculates difference between two datetime values as seconds + microseconds. t1 and t2 should be TIME/DATE/DATETIME value. sign can be +1

* countLeadingZeroes returns the number of leading zeroes that can be removed from fraction. @param i start index @param word value to c

parseTwoNumeric is used for pattens 0..31 0..24 0..60 and so on. It returns the parsed int, and remain data after parse.

AppendDuration appends a Duration value to the chunk.

CompareBinary compares two binary json objects. Returns -1 if left < right, 0 if left == right, else returns 1.

ConvertDatumToDecimal converts datum to decimal.

ConvertJSONToFloat casts JSON into float64.

ConvertTimeZone converts the time value from one timezone to another. The input time should be a valid timestamp.

DateFormat returns a textual representation of the time value formatted according to layout. See http://dev.mysql.com/doc/refman/5.7/en/date-and-time-

Decode decodes job from the json buffer, we must use DecodeArgs later to decode special args for this job.

DecodeUint decodes value encoded by EncodeUint before. It returns the leftover un-decoded slice, decoded value if no error.

DecodeVarint decodes value encoded by EncodeVarint before. It returns the leftover un-decoded slice, decoded value if no error.

EncodeFloat encodes a float v into a byte slice which can be sorted lexicographically later. EncodeFloat guarantees that the encoded value is in ascen

EncodeInt appends the encoded value to slice b and returns the appended slice. EncodeInt guarantees that the encoded value is in ascending order for c

End implements the Iterator interface.

End implements the Iterator interface.

End implements the Iterator interface.

End implements the Iterator interface.

Equal checks whether two FieldType objects are equal.

FromInt sets the decimal value from int64.

Gen generates a new *Error with the same class and code, and a new formatted message.

GetDatum gets datum of the expression.

IsStringKind returns true for ETString, ETDatetime, ETTimestamp, ETDuration, ETJson EvalTypes.

IsTypeVarchar returns a boolean indicating whether the tp is the varchar type like a varstring type or a varchar type.

NewTrackedBuffer creates a new TrackedBuffer.

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.

PeekBytesAsJSON trys to peek some bytes from b, until we can deserialize a JSON from those bytes.

Scan scans the tokenizer for the next token and returns the token type and an optional value.

SetFrac sets the frac of the datum.

SetLength sets the length of the datum

SetMysqlBit sets MysqlBit value

SetMysqlDuration sets Duration value

SetString sets string value.

Sha1Hash is an util function to calculate sha1 hash.

String returns the raw value as a string.

* ToBin converts decimal to its binary fixed-length representation two representations of the same length can be compared with memcmp with the correct

TypeStr converts tp to a string.

Weekday returns the Weekday value.

WriteArg writes a value argument into the buffer along with tracking information for future substitutions. arg must contain the ":" or "::" prefix.

YearWeek return year and week.

encode will encode a datum and append it to a byte slice. If comparable is true, the encoded bytes can be sorted as it's original order. If hash is tr

extractSecondMicrosecond extracts second and microsecond from a string and its format is `SS.FFFFFF`.

getDateFromDaynr changes a daynr to year, month and day, daynr 0 is returned as date 00.00.00

getFormatToken takes one format control token from the string. format "%d %H %m" will get token "%d" and the remain is " %H %m".

sub subtracts b and carry from a, returns the diff and new carry.

Add adds d to t, returns the result time value.

AddUint64 adds uint64 a and b if no overflow, else returns error.

Append appends the SQLNode to the buffer.

AppendEnum appends an Enum value to the chunk.

AppendFloat32 appends a float32 value to the chunk.

AppendFloat64 appends a float64 value to the chunk.

AppendInt64 appends a int64 value to the chunk.

AppendJSON appends a JSON value to the chunk.

AppendMyDecimal appends a MyDecimal value to the chunk.

AppendNull appends a null value to the chunk.

AppendSet appends a Set value to the chunk.

AppendTime appends a Time value to the chunk. TODO: change the time structure so it can be directly written to memory.

AppendUint64 appends a uint64 value to the chunk.

CompactStr only considers Tp/CharsetBin/Flen/Deimal. This is used for showing column type in infoschema.