expressions

Documentation

Index

• type Avg
  • func NewAvg(column *Column) *Avg
  • func (a *Avg) Write(sw io.StringWriter) error
• type Column
  • func (s Column) Write(sw io.StringWriter) error
• type Count
  • func NewCount(column *Column) *Count
  • func (c *Count) Write(sw io.StringWriter) error
• type Expression
• type List
  • func (e List) Write(writer io.StringWriter) error
• type Max
  • func NewMax(column *Column) *Max
  • func (m *Max) Write(sw io.StringWriter) error
• type Min
  • func NewMin(column *Column) *Min
  • func (m *Min) Write(sw io.StringWriter) error
• type String
  • func NewString(s string) String
  • func (e String) Write(writer io.StringWriter) error
• type Sum
  • func NewSum(column *Column) *Sum
  • func (s *Sum) Write(sw io.StringWriter) error

Types

type Avg

type Avg struct {
	Expr Expression
}

Avg is a avg aggregate function.

func NewAvg

func NewAvg(column *Column) *Avg

NewAvg returns a new Avg aggregate functions expression.

func (*Avg) Write

func (a *Avg) Write(sw io.StringWriter) error

type Column

type Column struct {
	From string // table name
	Name string // column name
}

Column is a column in a table

func (Column) Write

func (s Column) Write(sw io.StringWriter) error

Write writes the column to the given writer

type Count

type Count struct {
	Expr Expression
}

Count is a count aggregate function.

func NewCount

func NewCount(column *Column) *Count

NewCount returns a new Count aggregate functions expression.

func (*Count) Write

func (c *Count) Write(sw io.StringWriter) error

WriteTo implements Expression.

type Expression

type Expression interface {
	Write(io.StringWriter) error
}

Expression is a generic SQL expression.

type List

type List []Expression

List is a list of expressions separated by a comma.

func (List) Write

func (e List) Write(writer io.StringWriter) error

type Max

type Max struct {
	Expr Expression
}

Max is a max aggregate function.

func NewMax

func NewMax(column *Column) *Max

NewMax returns a new Max aggregate functions expression.

func (*Max) Write

func (m *Max) Write(sw io.StringWriter) error

type Min

type Min struct {
	Expr Expression
}

Min is a min aggregate function.

func NewMin

func NewMin(column *Column) *Min

NewMin returns a new Min aggregate functions expression.

func (*Min) Write

func (m *Min) Write(sw io.StringWriter) error

type String

type String string

func NewString

func NewString(s string) String

func (String) Write

func (e String) Write(writer io.StringWriter) error

type Sum

type Sum struct {
	Expr Expression
}

Sum is a sum aggregate function.

func NewSum

func NewSum(column *Column) *Sum

NewSum returns a new Sum aggregate functions expression.

func (*Sum) Write

func (s *Sum) Write(sw io.StringWriter) error