160 lines
3.3 KiB
Go
160 lines
3.3 KiB
Go
// Copyright © 2016 Abcum Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package db
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import (
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"fmt"
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"context"
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"github.com/abcum/surreal/sql"
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"github.com/abcum/surreal/util/data"
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"github.com/abcum/surreal/util/keys"
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)
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func (e *executor) executeDelete(ctx context.Context, stm *sql.DeleteStatement) ([]interface{}, error) {
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var what sql.Exprs
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for _, val := range stm.What {
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w, err := e.fetch(ctx, val, nil)
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if err != nil {
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return nil, err
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}
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what = append(what, w)
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}
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i := newIterator(e, ctx, stm, false)
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for _, w := range what {
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switch what := w.(type) {
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default:
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return nil, fmt.Errorf("Can not execute DELETE query using value '%v'", what)
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case *sql.Table:
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key := &keys.Table{KV: stm.KV, NS: stm.NS, DB: stm.DB, TB: what.TB}
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i.processTable(ctx, key)
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case *sql.Ident:
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key := &keys.Table{KV: stm.KV, NS: stm.NS, DB: stm.DB, TB: what.ID}
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i.processTable(ctx, key)
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case *sql.Thing:
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key := &keys.Thing{KV: stm.KV, NS: stm.NS, DB: stm.DB, TB: what.TB, ID: what.ID}
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i.processThing(ctx, key)
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case *sql.Model:
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key := &keys.Thing{KV: stm.KV, NS: stm.NS, DB: stm.DB, TB: what.TB, ID: nil}
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i.processModel(ctx, key, what)
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case *sql.Batch:
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key := &keys.Thing{KV: stm.KV, NS: stm.NS, DB: stm.DB, TB: what.TB, ID: nil}
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i.processBatch(ctx, key, what)
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}
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}
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return i.Yield(ctx)
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}
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func (e *executor) fetchDelete(ctx context.Context, stm *sql.DeleteStatement, doc *data.Doc) (interface{}, error) {
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ctx = dive(ctx)
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if doc != nil {
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vars := data.New()
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vars.Set(doc.Data(), varKeyParent)
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ctx = context.WithValue(ctx, ctxKeySubs, vars)
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}
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out, err := e.executeDelete(ctx, stm)
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if err != nil {
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return nil, err
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}
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switch len(out) {
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case 1:
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return data.Consume(out).Get(docKeyOne, docKeyId).Data(), nil
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default:
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return data.Consume(out).Get(docKeyAll, docKeyId).Data(), nil
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}
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}
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func (d *document) runDelete(ctx context.Context, stm *sql.DeleteStatement) (interface{}, error) {
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var ok bool
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var err error
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var met = _DELETE
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defer d.close()
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if err = d.setup(); err != nil {
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return nil, err
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}
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if d.val.Exi() == false {
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return nil, nil
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}
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if ok, err = d.allow(ctx, met); err != nil {
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return nil, err
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} else if ok == false {
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return nil, nil
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}
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if ok, err = d.check(ctx, stm.Cond); err != nil {
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return nil, err
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} else if ok == false {
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return nil, nil
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}
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if err = d.erase(); err != nil {
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return nil, err
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}
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if err = d.purgeIndex(); err != nil {
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return nil, err
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}
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if stm.Hard {
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if err = d.eraseThing(); err != nil {
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return nil, err
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}
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} else {
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if err = d.purgeThing(); err != nil {
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return nil, err
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}
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}
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if err = d.table(ctx, met); err != nil {
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return nil, err
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}
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if err = d.event(ctx, met); err != nil {
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return nil, err
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}
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if err = d.lives(ctx, met); err != nil {
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return nil, err
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}
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return d.yield(ctx, stm, stm.Echo)
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}
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