translator

Documentation

Index

• func Bind(mappings []*types.Mapping, queries []*types.Query) (map[*types.Query][]*types.Mapping, error)
• type Binding
• type Constraint
  • func GetConstraint(graph Graph, funcDeps map[types.Entity]map[string]interface{}) ([]Constraint, map[types.Node]string, error)
• type Graph
  • func (graph Graph) String() string
• type ProvInfo
• type Translation
  • func Translate(mappings []*types.Mapping, nodes []types.Node, queries []*types.Query, ...) (*Translation, error)

Functions

func Bind

func Bind(mappings []*types.Mapping, queries []*types.Query) (map[*types.Query][]*types.Mapping, error)

Bind binds mapping and query statements.

Types

type Binding

type Binding struct {
	Query   *types.Query
	Mapping *types.Mapping
}

Binding contains a query and mapping object which bind together.

type Constraint

type Constraint struct {
	// Left hand side of an SQL condition
	LHS types.Column
	// Right hand side of an SQL condition
	RHS interface{}
}

Constraint wraps the SQL lhs and rhs variable.

func GetConstraint

func GetConstraint(
	graph Graph,
	funcDeps map[types.Entity]map[string]interface{}) ([]Constraint, map[types.Node]string, error)

GetConstraint obtains a list of constraints object that can be used to construct SQL query.

type Graph

type Graph map[interface{}]map[interface{}]struct{}

Graph represents the struct for terms matching.

func (Graph) String

func (graph Graph) String() string

String gets the string reprentation of a graph.

type ProvInfo

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

ProvInfo contains the provenance query metadata

type Translation

type Translation struct {
	SQL        string
	Nodes      []types.Node
	Bindings   []Binding
	Constraint []Constraint
	Prov       map[int][]int
}

Translation contains the translated result.

func Translate

func Translate(
	mappings []*types.Mapping, nodes []types.Node, queries []*types.Query,
	subTypeMap map[string]string, options ...*types.QueryOptions) (
	*Translation, error)

Translate takes a datalog query and translates to GoogleSQL query based on schema mapping.