wehub-resource-sync
100 lines
4.1 KiB
Go
100 lines
4.1 KiB
Go
// Copyright 2022 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 information_schema
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import (
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/go-mysql-server/sql/information_schema"
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"github.com/dolthub/doltgresql/server/functions"
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"github.com/dolthub/doltgresql/postgres/parser/parser"
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"github.com/dolthub/doltgresql/postgres/parser/sem/tree"
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)
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// newViewsTable creates a new information_schema.VIEWS table.
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func newViewsTable() *information_schema.InformationSchemaTable {
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return &information_schema.InformationSchemaTable{
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TableName: information_schema.ViewsTableName,
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TableSchema: viewsSchema,
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Reader: viewsRowIter,
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}
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}
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// viewsSchema is the schema for the information_schema.VIEWS table.
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var viewsSchema = sql.Schema{
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{Name: "table_catalog", Type: sql_identifier, Default: nil, Nullable: true, Source: information_schema.ViewsTableName},
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{Name: "table_schema", Type: sql_identifier, Default: nil, Nullable: true, Source: information_schema.ViewsTableName},
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{Name: "table_name", Type: sql_identifier, Default: nil, Nullable: true, Source: information_schema.ViewsTableName},
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{Name: "view_definition", Type: character_data, Default: nil, Nullable: true, Source: information_schema.ViewsTableName},
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{Name: "check_option", Type: character_data, Default: nil, Nullable: true, Source: information_schema.ViewsTableName},
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{Name: "is_updatable", Type: yes_or_no, Default: nil, Nullable: true, Source: information_schema.ViewsTableName},
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{Name: "is_insertable_into", Type: yes_or_no, Default: nil, Nullable: true, Source: information_schema.ViewsTableName},
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{Name: "is_trigger_updatable", Type: yes_or_no, Default: nil, Nullable: true, Source: information_schema.ViewsTableName},
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{Name: "is_trigger_deletable", Type: yes_or_no, Default: nil, Nullable: false, Source: information_schema.ViewsTableName},
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{Name: "is_trigger_insertable_into", Type: yes_or_no, Default: nil, Nullable: false, Source: information_schema.ViewsTableName},
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}
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// viewsRowIter implements the sql.RowIter for the information_schema.VIEWS table.
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func viewsRowIter(ctx *sql.Context, catalog sql.Catalog) (sql.RowIter, error) {
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var rows []sql.Row
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err := functions.IterateCurrentDatabase(ctx, functions.Callbacks{
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View: func(ctx *sql.Context, schema functions.ItemSchema, view functions.ItemView) (cont bool, err error) {
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stmts, err := parser.Parse(view.Item.CreateViewStatement)
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if err != nil {
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return false, err
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}
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if len(stmts) == 0 {
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return false, sql.ErrViewCreateStatementInvalid.New(view.Item.CreateViewStatement)
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}
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cv, ok := stmts[0].AST.(*tree.CreateView)
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if !ok {
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return false, sql.ErrViewCreateStatementInvalid.New(view.Item.CreateViewStatement)
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}
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viewDef := cv.AsSource.String()
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checkOpt := "NONE"
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if cv.CheckOption == tree.ViewCheckOptionCascaded {
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checkOpt = "CASCADED"
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}
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if cv.CheckOption == tree.ViewCheckOptionLocal {
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checkOpt = "LOCAL"
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}
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// TODO: Fill out the rest of the columns.
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rows = append(rows, sql.Row{
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schema.Item.Name(), // table_catalog
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schema.Item.SchemaName(), // table_schema
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view.Item.Name, // table_name
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viewDef, // view_definition
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checkOpt, // check_option
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nil, // is_updatable
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nil, // is_insertable_into
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nil, // is_trigger_updatable
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nil, // is_trigger_deletable
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nil, // is_trigger_insertable_into
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})
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return true, nil
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},
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})
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if err != nil {
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return nil, err
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}
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return sql.RowsToRowIter(rows...), nil
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}
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