parse

const (
	ConvertTypeBinary   = "BINARY"
	ConvertTypeChar     = "CHAR"
	ConvertTypeDate     = "DATE"
	ConvertTypeDatetime = "DATETIME"
	ConvertTypeDecimal  = "DECIMAL"
	ConvertTypeSigned   = "SIGNED"
	ConvertTypeUnsigned = "UNSIGNED"
	ConvertTypeTime     = "TIME"
)

const (
	Avg           = "AVG"
	BitAnd        = "BIT_AND"
	BitOr         = "BIT_OR"
	BitXor        = "BIT_XOR"
	Count         = "COUNT"
	CountDistinct = "COUNT(DISTINCT)" //TODO
	GroupConcat   = "GROUP_CONCAT"
	Max           = "MAX"
	Min           = "MIN"
	Std           = "STD"
	StdDev        = "STDDEV"
	StdDevPop     = "STDDEV_POP"
	StdDevSamp    = "STDDEV_SAMP"
	Sum           = "SUM"
	VarPop        = "VAR_POP"
	VarSamp       = "VAR_SAMP"
	Variance      = "VARIANCE"
	Now           = "NOW"
	Concat        = "CONCAT"
)

const (
	ASC  = "ASC"
	DESC = "DESC"
)

const (
	Dual = "dual"
)