optimizer

package

v0.0.0-...-b640dd5 Latest Latest Go to latest Published: May 25, 2024 License: MIT Imports: 19 Imported by: 0

Details

Valid go.mod file

The Go module system was introduced in Go 1.11 and is the official dependency management solution for Go.
Redistributable license

Redistributable licenses place minimal restrictions on how software can be used, modified, and redistributed.
Tagged version

Modules with tagged versions give importers more predictable builds.
Stable version

When a project reaches major version v1 it is considered stable.
Learn more about best practices

Repository

github.com/ryogrid/SamehadaDB

Links

Open Source Insights

Documentation ¶

Index ¶

Variables
func CheckIncludesORInPredicate(exp interface{}) bool
func RewriteQueryInfo(c *catalog.Catalog, qi *parser.QueryInfo) (*parser.QueryInfo, error)
type CostAndPlan
type Direction
type Optimizer
type Range
- func NewRange(valType types.TypeID) *Range
- func (r *Range) Empty() bool
- func (r *Range) Update(op expression.ComparisonType, rhs *types.Value, dir Direction)
type SelingerOptimizer
- func NewSelingerOptimizer(qi *parser.QueryInfo, c *catalog.Catalog) *SelingerOptimizer
- func (so *SelingerOptimizer) Optimize() (plans.Plan, error)

Constants ¶

This section is empty.

Variables ¶

View Source

var CantTableIdentifedErr = errors.New("tableName can't be identified!")

View Source

var InvalidColNameErr = errors.New("invalid column name!")

View Source

var InvalidTableNameErr = errors.New("invalid table name!")

Functions ¶

func CheckIncludesORInPredicate ¶

func CheckIncludesORInPredicate(exp interface{}) bool

func RewriteQueryInfo ¶

func RewriteQueryInfo(c *catalog.Catalog, qi *parser.QueryInfo) (*parser.QueryInfo, error)

add table name prefix to column name if column name doesn't have it and attach predicate of ON clause to one of WHERE clause ATTENTION: this func modifies *qi* arg

Types ¶

type CostAndPlan ¶

type CostAndPlan struct {
	// contains filtered or unexported fields
}

type Direction ¶

type Direction bool

const (
	DIR_RIGHT Direction = false
	DIR_LEFT  Direction = true
)

type Optimizer ¶

type Optimizer interface {
	Optimize(*parser.QueryInfo, *executors.ExecutorContext, *catalog.Catalog, *access.Transaction) (plans.Plan, error)
}

type Range ¶

type Range struct {
	Min          *types.Value
	Max          *types.Value
	MinInclusive bool
	MaxInclusive bool
}

func NewRange ¶

func NewRange(valType types.TypeID) *Range

func (*Range) Empty ¶

func (r *Range) Empty() bool

func (*Range) Update ¶

func (r *Range) Update(op expression.ComparisonType, rhs *types.Value, dir Direction)

type SelingerOptimizer ¶

type SelingerOptimizer struct {
	// contains filtered or unexported fields
}

func NewSelingerOptimizer ¶

func NewSelingerOptimizer(qi *parser.QueryInfo, c *catalog.Catalog) *SelingerOptimizer

func (*SelingerOptimizer) Optimize ¶

func (so *SelingerOptimizer) Optimize() (plans.Plan, error)

TODO: (SDB) [OPT] adding support of ON clause (Optimize, findBestJoin, findBestJoinInner, findBestScans, findBestScan)

Source Files ¶

View all Source files

?	: This menu
/	: Search site
f or F	: Jump to
y or Y	: Canonical URL