wehub-resource-sync
74 lines
2.3 KiB
Go
Executable File
74 lines
2.3 KiB
Go
Executable File
// Copyright 2024 Dolthub, Inc.
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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 node
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import (
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"context"
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"github.com/dolthub/go-mysql-server/sql"
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vitess "github.com/dolthub/vitess/go/vt/sqlparser"
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)
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// DiscardStatement is just a marker type, since all functionality is handled by the connection handler,
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// rather than the engine. It has to conform to the sql.ExecSourceRel interface to be used in the handler, but this
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// functionality is all unused.
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type DiscardStatement struct{}
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var _ vitess.Injectable = DiscardStatement{}
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var _ sql.ExecSourceRel = DiscardStatement{}
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// Children implements the interface sql.ExecSourceRel.
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func (d DiscardStatement) Children() []sql.Node {
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return nil
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}
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// IsReadOnly implements the interface sql.ExecSourceRel.
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func (d DiscardStatement) IsReadOnly() bool {
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return true
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}
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// Resolved implements the interface sql.ExecSourceRel.
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func (d DiscardStatement) Resolved() bool {
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return true
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}
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// RowIter implements the interface sql.ExecSourceRel.
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func (d DiscardStatement) RowIter(ctx *sql.Context, r sql.Row) (sql.RowIter, error) {
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panic("DISCARD ALL should be handled by the connection handler")
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}
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// Schema implements the interface sql.ExecSourceRel.
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func (d DiscardStatement) Schema(ctx *sql.Context) sql.Schema {
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return nil
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}
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// String implements the interface sql.ExecSourceRel.
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func (d DiscardStatement) String() string {
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return "DISCARD ALL"
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}
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// WithChildren implements the interface sql.ExecSourceRel.
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func (d DiscardStatement) WithChildren(ctx *sql.Context, children ...sql.Node) (sql.Node, error) {
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return d, nil
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}
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// WithResolvedChildren implements the interface vitess.Injectable.
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func (d DiscardStatement) WithResolvedChildren(ctx context.Context, children []any) (any, error) {
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if len(children) != 0 {
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return nil, ErrVitessChildCount.New(0, len(children))
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}
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return d, nil
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}
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