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show_triggers.go
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show_triggers.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"
)
type ShowTriggers struct {
db sql.Database
Triggers []*CreateTrigger
}
var _ sql.Databaser = (*ShowTriggers)(nil)
var _ sql.Node = (*ShowTriggers)(nil)
var _ sql.CollationCoercible = (*ShowTriggers)(nil)
var showTriggersSchema = sql.Schema{
&sql.Column{Name: "Trigger", Type: types.LongText, Nullable: false},
&sql.Column{Name: "Event", Type: types.LongText, Nullable: false},
&sql.Column{Name: "Table", Type: types.LongText, Nullable: false},
&sql.Column{Name: "Statement", Type: types.LongText, Nullable: false},
&sql.Column{Name: "Timing", Type: types.LongText, Nullable: false},
&sql.Column{Name: "Created", Type: types.Datetime, Nullable: false},
&sql.Column{Name: "sql_mode", Type: types.LongText, Nullable: false},
&sql.Column{Name: "Definer", Type: types.LongText, Nullable: false},
&sql.Column{Name: "character_set_client", Type: types.LongText, Nullable: false},
&sql.Column{Name: "collation_connection", Type: types.LongText, Nullable: false},
&sql.Column{Name: "Database Collation", Type: types.LongText, Nullable: false},
}
// NewShowCreateTrigger creates a new ShowCreateTrigger node for SHOW TRIGGER statements.
func NewShowTriggers(db sql.Database) *ShowTriggers {
return &ShowTriggers{
db: db,
}
}
// String implements the sql.Node interface.
func (s *ShowTriggers) String() string {
return "SHOW TRIGGERS"
}
func (s *ShowTriggers) IsReadOnly() bool {
return true
}
// Resolved implements the sql.Node interface.
func (s *ShowTriggers) Resolved() bool {
_, ok := s.db.(sql.UnresolvedDatabase)
return !ok
}
// Children implements the sql.Node interface.
func (s *ShowTriggers) Children() []sql.Node {
return nil
}
// Schema implements the sql.Node interface.
func (s *ShowTriggers) Schema() sql.Schema {
return showTriggersSchema
}
// WithChildren implements the sql.Node interface.
func (s *ShowTriggers) WithChildren(children ...sql.Node) (sql.Node, error) {
return NillaryWithChildren(s, children...)
}
// CheckPrivileges implements the interface sql.Node.
func (s *ShowTriggers) CheckPrivileges(ctx *sql.Context, opChecker sql.PrivilegedOperationChecker) bool {
//TODO: figure out what privileges are needed here
return true
}
// CollationCoercibility implements the interface sql.CollationCoercible.
func (*ShowTriggers) CollationCoercibility(ctx *sql.Context) (collation sql.CollationID, coercibility byte) {
return sql.Collation_binary, 7
}
// Database implements the sql.Databaser interface.
func (s *ShowTriggers) Database() sql.Database {
return s.db
}
// WithDatabase implements the sql.Databaser interface.
func (s *ShowTriggers) WithDatabase(db sql.Database) (sql.Node, error) {
ns := *s
ns.db = db
return &ns, nil
}