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showwarnings.go
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showwarnings.go
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// Copyright 2020-2021 Dolthub, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package plan
import (
"github.com/dolthub/go-mysql-server/sql"
"github.com/dolthub/go-mysql-server/sql/types"
)
// ShowWarnings is a node that shows the session warnings
type ShowWarnings []*sql.Warning
var _ sql.Node = (*ShowWarnings)(nil)
var _ sql.CollationCoercible = (*ShowWarnings)(nil)
// Resolved implements sql.Node interface. The function always returns true.
func (ShowWarnings) Resolved() bool {
return true
}
// WithChildren implements the Node interface.
func (sw ShowWarnings) WithChildren(children ...sql.Node) (sql.Node, error) {
if len(children) != 0 {
return nil, sql.ErrInvalidChildrenNumber.New(sw, len(children), 0)
}
return sw, nil
}
// CheckPrivileges implements the interface sql.Node.
func (sw ShowWarnings) CheckPrivileges(ctx *sql.Context, opChecker sql.PrivilegedOperationChecker) bool {
return true
}
// CollationCoercibility implements the interface sql.CollationCoercible.
func (ShowWarnings) CollationCoercibility(ctx *sql.Context) (collation sql.CollationID, coercibility byte) {
return sql.Collation_binary, 7
}
// String implements the fmt.Stringer interface.
func (ShowWarnings) String() string {
return "SHOW WARNINGS"
}
func (ShowWarnings) IsReadOnly() bool {
return true
}
// Schema returns a new Schema reference for "SHOW VARIABLES" query.
func (ShowWarnings) Schema() sql.Schema {
return sql.Schema{
&sql.Column{Name: "Level", Type: types.LongText, Nullable: false},
&sql.Column{Name: "Code", Type: types.Int32, Nullable: true},
&sql.Column{Name: "Message", Type: types.LongText, Nullable: false},
}
}
// Children implements sql.Node interface. The function always returns nil.
func (ShowWarnings) Children() []sql.Node { return nil }