physical

package

v0.0.0-...-5633d0c Latest Latest Go to latest Published: Jan 1, 2023 License: MIT Imports: 10 Imported by: 0

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Repository

github.com/jacobsimpson/mtsql

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Documentation ¶

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type PlanDescription ¶

type PlanDescription struct {
	Name        string
	Description string
}

type RowReader ¶

type RowReader interface {
	Columns() []*metadata.Column
	Read() ([]string, error)
	Reset() error
	Close()

	PlanDescription() *PlanDescription
	Children() []RowReader
}

func Convert ¶

func Convert(o logical.Operation, tables map[string]*md.Relation) (RowReader, error)

func NewColumnFilter ¶

func NewColumnFilter(rowReader RowReader, left, right *metadata.Column) (RowReader, error)

func NewFilter ¶

func NewFilter(rowReader RowReader, column *metadata.Column, value *ast.Constant) (RowReader, error)

func NewMemoryScan ¶

func NewMemoryScan(columns []*metadata.Column, rows [][]string) RowReader

func NewNestedLoopJoin ¶

func NewNestedLoopJoin(left, right RowReader) (RowReader, error)

func NewProjection ¶

func NewProjection(rowReader RowReader, columns []*metadata.Column) (RowReader, error)

func NewSortScan ¶

func NewSortScan(rowReader RowReader, columns []SortScanCriteria) (RowReader, error)

func NewTableScan ¶

func NewTableScan(tableName, fileName string) (RowReader, error)

type SortOrder ¶

type SortOrder string

const (
	Asc  SortOrder = "Asc"
	Desc SortOrder = "Desc"
)

type SortScanCriteria ¶

type SortScanCriteria struct {
	Column    *metadata.Column
	SortOrder SortOrder
}

Source Files ¶

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