aggregation

Jun 13, 2023

Changes in this version

+ var ErrEvalUnsupportedOnAggregation = errors.NewKind(...)

+ var ErrUnsupportedJSONFunction = errors.NewKind("unsupported JSON function: %s")

+ func NewEmptyGroupConcat() sql.Expression

+ func NewJSONObjectAgg(key, value sql.Expression) sql.Expression

+ type Avg struct

+ func NewAvg(e sql.Expression) *Avg

+ func (a *Avg) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (a *Avg) FunctionName() string

+ func (a *Avg) IsNullable() bool

+ func (a *Avg) NewBuffer() (sql.AggregationBuffer, error)

+ func (a *Avg) String() string

+ func (a *Avg) Type() sql.Type

+ func (a *Avg) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type Count struct

+ func NewCount(e sql.Expression) *Count

+ func (c *Count) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (c *Count) FunctionName() string

+ func (c *Count) IsNullable() bool

+ func (c *Count) NewBuffer() (sql.AggregationBuffer, error)

+ func (c *Count) Resolved() bool

+ func (c *Count) String() string

+ func (c *Count) Type() sql.Type

+ func (c *Count) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type CountDistinct struct

+ func NewCountDistinct(e sql.Expression) *CountDistinct

+ func (c *CountDistinct) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (c *CountDistinct) FunctionName() string

+ func (c *CountDistinct) IsNullable() bool

+ func (c *CountDistinct) NewBuffer() (sql.AggregationBuffer, error)

+ func (c *CountDistinct) Resolved() bool

+ func (c *CountDistinct) String() string

+ func (c *CountDistinct) Type() sql.Type

+ func (c *CountDistinct) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type First struct

+ func NewFirst(e sql.Expression) *First

+ func (f *First) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (f *First) FunctionName() string

+ func (f *First) NewBuffer() (sql.AggregationBuffer, error)

+ func (f *First) String() string

+ func (f *First) Type() sql.Type

+ func (f *First) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type GroupConcat struct

+ func NewGroupConcat(distinct string, orderBy sql.SortFields, separator string, ...) (*GroupConcat, error)

+ func (g *GroupConcat) Children() []sql.Expression

+ func (g *GroupConcat) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (g *GroupConcat) FunctionName() string

+ func (g *GroupConcat) IsNullable() bool

+ func (g *GroupConcat) NewBuffer() (sql.AggregationBuffer, error)

+ func (g *GroupConcat) Resolved() bool

+ func (g *GroupConcat) String() string

+ func (g *GroupConcat) Type() sql.Type

+ func (g *GroupConcat) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type JSONArrayAgg struct

+ func NewJSONArrayAgg(arg sql.Expression) *JSONArrayAgg

+ func (j *JSONArrayAgg) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (j *JSONArrayAgg) FunctionName() string

+ func (j *JSONArrayAgg) IsNullable() bool

+ func (j *JSONArrayAgg) NewBuffer() (sql.AggregationBuffer, error)

+ func (j *JSONArrayAgg) Resolved() bool

+ func (j *JSONArrayAgg) String() string

+ func (j *JSONArrayAgg) Type() sql.Type

+ func (j *JSONArrayAgg) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type JSONObjectAgg struct

+ func (j JSONObjectAgg) Children() []sql.Expression

+ func (j JSONObjectAgg) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (j JSONObjectAgg) FunctionName() string

+ func (j JSONObjectAgg) IsNullable() bool

+ func (j JSONObjectAgg) NewBuffer() (sql.AggregationBuffer, error)

+ func (j JSONObjectAgg) Resolved() bool

+ func (j JSONObjectAgg) String() string

+ func (j JSONObjectAgg) Type() sql.Type

+ func (j JSONObjectAgg) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type Last struct

+ func NewLast(e sql.Expression) *Last

+ func (l *Last) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (l *Last) FunctionName() string

+ func (l *Last) NewBuffer() (sql.AggregationBuffer, error)

+ func (l *Last) String() string

+ func (l *Last) Type() sql.Type

+ func (l *Last) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type Max struct

+ func NewMax(e sql.Expression) *Max

+ func (m *Max) DebugString() string

+ func (m *Max) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (m *Max) FunctionName() string

+ func (m *Max) IsNullable() bool

+ func (m *Max) NewBuffer() (sql.AggregationBuffer, error)

+ func (m *Max) String() string

+ func (m *Max) Type() sql.Type

+ func (m *Max) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type Min struct

+ func NewMin(e sql.Expression) *Min

+ func (m *Min) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (m *Min) FunctionName() string

+ func (m *Min) IsNullable() bool

+ func (m *Min) NewBuffer() (sql.AggregationBuffer, error)

+ func (m *Min) String() string

+ func (m *Min) Type() sql.Type

+ func (m *Min) WithChildren(children ...sql.Expression) (sql.Expression, error)

+ type Sum struct

+ func NewSum(e sql.Expression) *Sum

+ func (m *Sum) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

+ func (m *Sum) FunctionName() string

+ func (m *Sum) NewBuffer() (sql.AggregationBuffer, error)

+ func (m *Sum) String() string

+ func (m *Sum) Type() sql.Type

+ func (m *Sum) WithChildren(children ...sql.Expression) (sql.Expression, error)