mirror of
https://github.com/featurebasedb/featurebase.git
synced 2026-08-28 02:44:59 +00:00
284f62dcb9
* create function, create/drop model; re-introduced limit; added COPY; var(); corr() * review feedback
104 lines
2.7 KiB
Go
104 lines
2.7 KiB
Go
// Copyright 2023 Molecula Corp. All rights reserved.
|
|
|
|
package planner
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
|
|
"github.com/featurebasedb/featurebase/v3/sql3"
|
|
"github.com/featurebasedb/featurebase/v3/sql3/planner/types"
|
|
)
|
|
|
|
// PlanOpCreateFunction implements the CREATE FUNCTION operator
|
|
type PlanOpCreateFunction struct {
|
|
planner *ExecutionPlanner
|
|
function *functionSystemObject
|
|
ifNotExists bool
|
|
warnings []string
|
|
}
|
|
|
|
func NewPlanOpCreateFunction(planner *ExecutionPlanner, ifNotExists bool, function *functionSystemObject) *PlanOpCreateFunction {
|
|
return &PlanOpCreateFunction{
|
|
planner: planner,
|
|
function: function,
|
|
ifNotExists: ifNotExists,
|
|
warnings: make([]string, 0),
|
|
}
|
|
}
|
|
|
|
func (p *PlanOpCreateFunction) Schema() types.Schema {
|
|
return types.Schema{}
|
|
}
|
|
|
|
func (p *PlanOpCreateFunction) Iterator(ctx context.Context, row types.Row) (types.RowIterator, error) {
|
|
return newCreateFunctionIter(p.planner, p.ifNotExists, p.function), nil
|
|
}
|
|
|
|
func (p *PlanOpCreateFunction) Children() []types.PlanOperator {
|
|
return []types.PlanOperator{}
|
|
}
|
|
|
|
func (p *PlanOpCreateFunction) WithChildren(children ...types.PlanOperator) (types.PlanOperator, error) {
|
|
if len(children) != 0 {
|
|
return nil, sql3.NewErrInternalf("unexpected number of children '%d'", len(children))
|
|
}
|
|
return NewPlanOpCreateFunction(p.planner, p.ifNotExists, p.function), nil
|
|
}
|
|
|
|
func (p *PlanOpCreateFunction) Plan() map[string]interface{} {
|
|
result := make(map[string]interface{})
|
|
result["_op"] = fmt.Sprintf("%T", p)
|
|
result["_schema"] = p.Schema().Plan()
|
|
result["model"] = p.function.name
|
|
return result
|
|
}
|
|
|
|
func (p *PlanOpCreateFunction) String() string {
|
|
return ""
|
|
}
|
|
|
|
func (p *PlanOpCreateFunction) AddWarning(warning string) {
|
|
p.warnings = append(p.warnings, warning)
|
|
}
|
|
|
|
func (p *PlanOpCreateFunction) Warnings() []string {
|
|
var w []string
|
|
w = append(w, p.warnings...)
|
|
return w
|
|
}
|
|
|
|
type createFunctionIter struct {
|
|
planner *ExecutionPlanner
|
|
function *functionSystemObject
|
|
ifNotExists bool
|
|
}
|
|
|
|
func newCreateFunctionIter(planner *ExecutionPlanner, ifNotExists bool, function *functionSystemObject) *createFunctionIter {
|
|
return &createFunctionIter{
|
|
planner: planner,
|
|
function: function,
|
|
ifNotExists: ifNotExists,
|
|
}
|
|
}
|
|
|
|
func (i *createFunctionIter) Next(ctx context.Context) (types.Row, error) {
|
|
// now check in the functions table to see if it is exists
|
|
v, err := i.planner.getFunctionByName(i.function.name)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if v != nil {
|
|
if i.ifNotExists {
|
|
return nil, types.ErrNoMoreRows
|
|
}
|
|
return nil, sql3.NewErrViewExists(0, 0, i.function.name)
|
|
}
|
|
|
|
// now store the view into fb_functions
|
|
err = i.planner.insertFunction(i.function)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return nil, types.ErrNoMoreRows
|
|
}
|