simple

Documentation

Index

• func CanFastCountBucket(resultExprList ast.ResultExpressionList) bool
• func CanFastCountIndex(index catalog.CountIndex, bucket string, ...) ast.Expression
• func CanIUseThisIndexForThisProjectionNoWhereNoGroupClause(index catalog.RangeIndex, resultExprList ast.ResultExpressionList, ...) (bool, plan.ScanRanges, ast.Expression, error)
• func CanIUseThisIndexForThisWhereClause(index catalog.RangeIndex, where ast.Expression, bucket string) (bool, plan.ScanRanges, ast.Expression, error)
• func DoesIndexCoverStatement(index catalog.RangeIndex, stmt *ast.SelectStatement) bool
• func IndexKeyInFormalNotation(key catalog.IndexKey, bucket string) (catalog.IndexKey, error)
• func MergeRanges(origr plan.ScanRanges, newr *plan.ScanRange) plan.ScanRanges
• func WhereClauseFindById(where ast.Expression) []string
• type ExpressionSargable
  • func NewExpressionSargable(indexExpression ast.Expression) *ExpressionSargable
  • func (this *ExpressionSargable) IsSargable() bool
  • func (this *ExpressionSargable) ScanRanges() plan.ScanRanges
  • func (this *ExpressionSargable) Visit(e ast.Expression) (ast.Expression, error)
• type SimplePlanner
  • func NewSimplePlanner(site catalog.Site, defaultPool string) *SimplePlanner
  • func (this *SimplePlanner) Plan(stmt ast.Statement) (plan.PlanChannel, query.ErrorChannel)

Functions

func CanFastCountBucket

func CanFastCountBucket(resultExprList ast.ResultExpressionList) bool

func CanFastCountIndex

func CanFastCountIndex(index catalog.CountIndex, bucket string, resultExprList ast.ResultExpressionList) ast.Expression

func CanIUseThisIndexForThisProjectionNoWhereNoGroupClause

func CanIUseThisIndexForThisProjectionNoWhereNoGroupClause(index catalog.RangeIndex, resultExprList ast.ResultExpressionList, bucket string) (bool, plan.ScanRanges, ast.Expression, error)

func CanIUseThisIndexForThisWhereClause

func CanIUseThisIndexForThisWhereClause(index catalog.RangeIndex, where ast.Expression, bucket string) (bool, plan.ScanRanges, ast.Expression, error)

func DoesIndexCoverStatement

func DoesIndexCoverStatement(index catalog.RangeIndex, stmt *ast.SelectStatement) bool

func IndexKeyInFormalNotation

func IndexKeyInFormalNotation(key catalog.IndexKey, bucket string) (catalog.IndexKey, error)

func MergeRanges

func MergeRanges(origr plan.ScanRanges, newr *plan.ScanRange) plan.ScanRanges

func WhereClauseFindById

func WhereClauseFindById(where ast.Expression) []string

Types

type ExpressionSargable

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

determines if the given expression is sargable with respect to a given index expression for example is abv > 7 sargable with respect to an index on abv? yes

func NewExpressionSargable

func NewExpressionSargable(indexExpression ast.Expression) *ExpressionSargable

func (*ExpressionSargable) IsSargable

func (this *ExpressionSargable) IsSargable() bool

func (*ExpressionSargable) ScanRanges

func (this *ExpressionSargable) ScanRanges() plan.ScanRanges

func (*ExpressionSargable) Visit

func (this *ExpressionSargable) Visit(e ast.Expression) (ast.Expression, error)

type SimplePlanner

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

func NewSimplePlanner

func NewSimplePlanner(site catalog.Site, defaultPool string) *SimplePlanner

func (*SimplePlanner) Plan

func (this *SimplePlanner) Plan(stmt ast.Statement) (plan.PlanChannel, query.ErrorChannel)