wehub-resource-sync
49 lines
1.7 KiB
Go
49 lines
1.7 KiB
Go
// 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 tables
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import "github.com/dolthub/go-mysql-server/sql"
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// Handler is an interface that controls how data is represented for some table.
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type Handler interface {
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// Name returns the name of the table.
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Name() string
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// RowIter returns a sql.RowIter that returns the rows of the table.
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RowIter(ctx *sql.Context, partition sql.Partition) (sql.RowIter, error)
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// PkSchema returns the table's schema.
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PkSchema() sql.PrimaryKeySchema
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}
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type IndexedTableHandler interface {
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Handler
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// Indexes returns the table's indexes.
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Indexes() ([]sql.Index, error)
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// LookupPartitions returns a sql.PartitionIter that can be used to look up rows in the table using the given lookup
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LookupPartitions(context *sql.Context, lookup sql.IndexLookup) (sql.PartitionIter, error)
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}
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// handlers is a map from the schema name, to the table name, to the handler.
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var handlers = map[string]map[string]Handler{}
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// AddHandler adds the given handler to the handler set.
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func AddHandler(schemaName string, tableName string, handler Handler) {
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tableMap, ok := handlers[schemaName]
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if !ok {
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tableMap = make(map[string]Handler)
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handlers[schemaName] = tableMap
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}
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tableMap[tableName] = handler
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}
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