github.com/dolthub/go-mysql-server@v0.18.0/sql/mysql_db/mysql_table.go (about)

     1  // Copyright 2022 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package mysql_db
    16  
    17  import (
    18  	"gopkg.in/src-d/go-errors.v1"
    19  
    20  	"github.com/dolthub/go-mysql-server/sql"
    21  )
    22  
    23  var errPrimaryKeyUnknownEntry = errors.NewKind("the primary key for the `%s` table was given an unknown entry")
    24  var errPrimaryKeyUnknownSchema = errors.NewKind("the primary key for the `%s` table was given a row belonging to an unknown schema")
    25  
    26  type mysqlTable struct {
    27  	name string
    28  	sch  sql.Schema
    29  	db   *MySQLDb
    30  }
    31  
    32  var _ sql.Table = (*mysqlTable)(nil)
    33  
    34  // newEmptyMySQLTable returns a new MySQL Table that does not contain any row data. Useful when you only need the
    35  // schema of a table to exist, and don't need any data in it.
    36  func newEmptyMySQLTable(name string, sch sql.Schema, db *MySQLDb) *mysqlTable {
    37  	return &mysqlTable{
    38  		name: name,
    39  		db:   db,
    40  		sch:  sch,
    41  	}
    42  }
    43  
    44  // Name implements the interface sql.Table.
    45  func (t *mysqlTable) Name() string {
    46  	return t.name
    47  }
    48  
    49  // String implements the interface sql.Table.
    50  func (t *mysqlTable) String() string {
    51  	return t.name
    52  }
    53  
    54  // Schema implements the interface sql.Table.
    55  func (t *mysqlTable) Schema() sql.Schema {
    56  	return t.sch.Copy()
    57  }
    58  
    59  // Collation implements the interface sql.Table.
    60  func (t *mysqlTable) Collation() sql.CollationID {
    61  	return sql.Collation_utf8mb3_bin
    62  }
    63  
    64  // Partitions implements the interface sql.Table.
    65  func (t *mysqlTable) Partitions(ctx *sql.Context) (sql.PartitionIter, error) {
    66  	return sql.PartitionsToPartitionIter(dummyPartition{}), nil
    67  }
    68  
    69  // PartitionRows implements the interface sql.Table.
    70  func (t *mysqlTable) PartitionRows(ctx *sql.Context, partition sql.Partition) (sql.RowIter, error) {
    71  	return sql.RowsToRowIter(nil), nil
    72  }