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ee7ec10b11
This patch adds the parsing for the "CREATE MATERIALIZED VIEW" statement, following Cassandra 3 syntax. For example: CREATE MATERIALIZED VIEW building_by_city AS SELECT * FROM buildings WHERE city IS NOT NULL PRIMARY KEY(city, name); It also adds the "IS NOT NULL" operator needed for this purpose. As in Cassandra, "IS NOT NULL" can only be used for materialized view creation, and not in a normal SELECT. It can only be used with the NULL operand (i.e., "IS NOT 3" will be a syntax error). The current implementation of this statement just does some sanity checking (such as to verify that "city" is a valid column name and that the "building" base table exists), complains that materialized views are not yet supported: SyntaxException: <ErrorMessage code=2000 [Syntax error in CQL query] message="Failed parsing statement: [CREATE MATERIALIZED VIEW building_by_city AS SELECT * FROM buildings WHERE city IS NOT NULL PRIMARY KEY(city, name);] reason: unsupported operation: Materialized views not yet supported"> As mentioned above, the "IS NOT NULL" restriction is not allowed in ordinary selects not creating a materialized views: SELECT * FROM buildings WHERE city IS NOT NULL; InvalidRequest: code=2200 [Invalid query] message="restriction 'city IS NOT null' is only supported in materialized view creation" Signed-off-by: Nadav Har'El <nyh@scylladb.com> Message-Id: <1475742927-30695-1-git-send-email-nyh@scylladb.com>
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
/*
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* This file is part of Scylla.
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* Copyright (C) 2016 ScyllaDB
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*
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "cql3/statements/schema_altering_statement.hh"
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#include "cql3/statements/cf_prop_defs.hh"
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#include "cql3/cql3_type.hh"
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#include "cql3/selection/raw_selector.hh"
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#include "cql3/relation.hh"
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#include "cql3/cf_name.hh"
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#include "service/migration_manager.hh"
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#include "schema.hh"
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#include "core/shared_ptr.hh"
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#include <utility>
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#include <vector>
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#include <experimental/optional>
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namespace cql3 {
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namespace statements {
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/** A <code>CREATE MATERIALIZED VIEW</code> parsed from a CQL query statement. */
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class create_view_statement : public schema_altering_statement {
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private:
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::shared_ptr<cf_name> _base_name;
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std::vector<::shared_ptr<selection::raw_selector>> _select_clause;
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std::vector<::shared_ptr<relation>> _where_clause;
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std::vector<::shared_ptr<cql3::column_identifier::raw>> _partition_keys;
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std::vector<::shared_ptr<cql3::column_identifier::raw>> _clustering_keys;
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const ::shared_ptr<cf_prop_defs> _properties;
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bool _if_not_exists;
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public:
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create_view_statement(
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::shared_ptr<cf_name> view_name,
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::shared_ptr<cf_name> base_name,
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std::vector<::shared_ptr<selection::raw_selector>> select_clause,
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std::vector<::shared_ptr<relation>> where_clause,
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std::vector<::shared_ptr<cql3::column_identifier::raw>> partition_keys,
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std::vector<::shared_ptr<cql3::column_identifier::raw>> clustering_keys,
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::shared_ptr<cf_prop_defs> properties,
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bool if_not_exists);
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// Functions we need to override to subclass schema_altering_statement
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virtual future<> check_access(const service::client_state& state) override;
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virtual void validate(distributed<service::storage_proxy>&, const service::client_state& state) override;
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virtual future<bool> announce_migration(distributed<service::storage_proxy>& proxy, bool is_local_only) override;
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virtual shared_ptr<transport::event::schema_change> change_event() override;
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virtual shared_ptr<prepared> prepare(database& db) override;
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// FIXME: continue here. See create_table_statement.hh and CreateViewStatement.java
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};
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}
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}
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