b18cc8145f
In this commit we make use of splitted functions introduced before. Pattern is as follows: - in merge_tables_and_views we call some preparatory functions - in schema_applier::update we call non-yielding step - in schema_applier::post_commit we call cleanups and other finalizing async functions Additionally we introduce frozen_schema_diff because converting schema_ptr to global_schema_ptr triggers schema registration and with atomic changes we need to place registration only in commit phase. Schema freezing is the same method global_schema_ptr uses to transport schema across shards (via schema_registry cache).
45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
/*
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* Copyright 2015-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.0
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*/
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#pragma once
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#include "schema/schema_fwd.hh"
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#include "mutation/frozen_mutation.hh"
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#include "bytes_ostream.hh"
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#include "db/view/base_info.hh"
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namespace db {
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class schema_ctxt;
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}
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// Transport for schema_ptr across shards/nodes.
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// It's safe to access from another shard by const&.
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class frozen_schema {
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bytes_ostream _data;
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public:
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explicit frozen_schema(bytes_ostream);
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frozen_schema(const schema_ptr&);
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frozen_schema(frozen_schema&&) = default;
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frozen_schema(const frozen_schema&) = default;
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frozen_schema& operator=(const frozen_schema&) = default;
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frozen_schema& operator=(frozen_schema&&) = default;
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schema_ptr unfreeze(const db::schema_ctxt&, std::optional<db::view::base_dependent_view_info> base_info = {}) const;
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const bytes_ostream& representation() const;
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};
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// To unfreeze view without base table added to schema registry
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// we need base_info.
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class frozen_schema_with_base_info : public frozen_schema {
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public:
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frozen_schema_with_base_info(const schema_ptr& c);
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schema_ptr unfreeze(const db::schema_ctxt& ctxt) const;
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private:
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// Set only for views.
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std::optional<db::view::base_dependent_view_info> base_info;
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};
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