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https://github.com/featurebasedb/featurebase.git
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a15783cb49
* WIP: Convert SchemaAPI to be DAX-centric * Tables(), CreateField() * CreateTable(), DeleteTable(), DeleteField() * More cleanup * Remove the old SchemaAPI
90 lines
2.1 KiB
Go
90 lines
2.1 KiB
Go
// Copyright 2021 Molecula Corp. All rights reserved.
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package planner
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import (
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"context"
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"fmt"
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pilosa "github.com/molecula/featurebase/v3"
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"github.com/molecula/featurebase/v3/dax"
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"github.com/molecula/featurebase/v3/sql3/planner/types"
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)
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// PlanOpDropTable plan operator to drop a table.
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type PlanOpDropTable struct {
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planner *ExecutionPlanner
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index *pilosa.IndexInfo
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warnings []string
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}
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func NewPlanOpDropTable(p *ExecutionPlanner, index *pilosa.IndexInfo) *PlanOpDropTable {
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return &PlanOpDropTable{
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planner: p,
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index: index,
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warnings: make([]string, 0),
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}
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}
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func (p *PlanOpDropTable) Plan() map[string]interface{} {
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result := make(map[string]interface{})
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result["_op"] = fmt.Sprintf("%T", p)
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ps := make([]string, 0)
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for _, e := range p.Schema() {
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ps = append(ps, fmt.Sprintf("'%s', '%s', '%s'", e.ColumnName, e.RelationName, e.Type.TypeDescription()))
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}
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result["_schema"] = ps
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result["tableName"] = p.index.Name
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return result
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}
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func (p *PlanOpDropTable) String() string {
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return ""
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}
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func (p *PlanOpDropTable) AddWarning(warning string) {
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p.warnings = append(p.warnings, warning)
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}
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func (p *PlanOpDropTable) Warnings() []string {
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return p.warnings
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}
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func (p *PlanOpDropTable) Schema() types.Schema {
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return types.Schema{}
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}
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func (p *PlanOpDropTable) Children() []types.PlanOperator {
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return []types.PlanOperator{}
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}
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func (p *PlanOpDropTable) Iterator(ctx context.Context, row types.Row) (types.RowIterator, error) {
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return &dropTableRowIter{
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planner: p.planner,
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index: p.index,
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}, nil
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}
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func (p *PlanOpDropTable) WithChildren(children ...types.PlanOperator) (types.PlanOperator, error) {
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return nil, nil
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}
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type dropTableRowIter struct {
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planner *ExecutionPlanner
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index *pilosa.IndexInfo
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}
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var _ types.RowIterator = (*dropTableRowIter)(nil)
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func (i *dropTableRowIter) Next(ctx context.Context) (types.Row, error) {
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err := i.planner.checkAccess(ctx, i.index.Name, accessTypeDropObject)
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if err != nil {
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return nil, err
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}
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err = i.planner.schemaAPI.DeleteTable(ctx, dax.TableName(i.index.Name))
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if err != nil {
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return nil, err
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}
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return nil, types.ErrNoMoreRows
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}
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