mirror of
https://github.com/featurebasedb/featurebase.git
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4e3856348c
* WIP: Convert SchemaAPI to be DAX-centric
* Tables(), CreateField()
* CreateTable(), DeleteTable(), DeleteField()
* More cleanup
* Remove the old SchemaAPI
(cherry picked from commit a15783cb49)
116 lines
2.9 KiB
Go
116 lines
2.9 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"
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"github.com/molecula/featurebase/v3/sql3/planner/types"
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)
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// PlanOpAlterTable plan operator to alter a table.
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type PlanOpAlterTable struct {
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planner *ExecutionPlanner
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tableName string
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operation alterOperation
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oldColumnName string
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newColumnName string
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columnDef *createTableField
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warnings []string
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}
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func NewPlanOpAlterTable(p *ExecutionPlanner, tableName string, operation alterOperation, oldColumnName string, newColumnName string, columnDef *createTableField) *PlanOpAlterTable {
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return &PlanOpAlterTable{
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planner: p,
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tableName: tableName,
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operation: operation,
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oldColumnName: oldColumnName,
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newColumnName: newColumnName,
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columnDef: columnDef,
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warnings: make([]string, 0),
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}
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}
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func (p *PlanOpAlterTable) 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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result["tableName"] = p.tableName
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return result
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}
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func (p *PlanOpAlterTable) AddWarning(warning string) {
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p.warnings = append(p.warnings, warning)
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}
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func (p *PlanOpAlterTable) Warnings() []string {
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return p.warnings
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}
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func (p *PlanOpAlterTable) String() string {
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return ""
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}
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func (p *PlanOpAlterTable) Schema() types.Schema {
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return types.Schema{}
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}
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func (p *PlanOpAlterTable) Children() []types.PlanOperator {
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return []types.PlanOperator{}
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}
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func (p *PlanOpAlterTable) Iterator(ctx context.Context, row types.Row) (types.RowIterator, error) {
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return &alterTableRowIter{
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planner: p.planner,
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operation: p.operation,
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tableName: p.tableName,
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columnDef: p.columnDef,
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oldColumnName: p.oldColumnName,
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}, nil
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}
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func (p *PlanOpAlterTable) WithChildren(children ...types.PlanOperator) (types.PlanOperator, error) {
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return nil, nil
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}
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type alterTableRowIter struct {
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planner *ExecutionPlanner
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operation alterOperation
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tableName string
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columnDef *createTableField
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oldColumnName string
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}
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var _ types.RowIterator = (*alterTableRowIter)(nil)
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func (i *alterTableRowIter) Next(ctx context.Context) (types.Row, error) {
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switch i.operation {
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case alterOpAdd:
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tname := dax.TableName(i.tableName)
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fname := dax.FieldName(i.columnDef.name)
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fos := i.columnDef.fos
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fld, err := pilosa.FieldFromFieldOptions(fname, fos...)
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if err != nil {
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return nil, err
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}
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if err := i.planner.schemaAPI.CreateField(ctx, tname, fld); err != nil {
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return nil, err
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}
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case alterOpDrop:
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err := i.planner.schemaAPI.DeleteField(ctx, dax.TableName(i.tableName), dax.FieldName(i.oldColumnName))
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if err != nil {
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return nil, err
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}
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case alterOpRename:
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return nil, sql3.NewErrInternal("column rename is unimplemented")
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}
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return nil, types.ErrNoMoreRows
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}
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