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e1f7f04752
* Rename DDLDependencyVisitor -> DDLLoadingDependencyVisitor. * Move building a loading graph to TablesLoader. * Implement referential dependencies for tables and use them when restoring tables from a backup. * Remove StorageID::operator < (because of its inconsistency with ==). * Add new tests. * Fix test. * Fix memory leak. Co-authored-by: Nikita Mikhaylov <mikhaylovnikitka@gmail.com>
28 lines
1.0 KiB
C++
28 lines
1.0 KiB
C++
#pragma once
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#include <Interpreters/Context_fwd.h>
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namespace DB
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{
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/// Load tables from system database. Only real tables like query_log, part_log.
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/// You should first load system database, then attach system tables that you need into it, then load other databases.
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void loadMetadataSystem(ContextMutablePtr context);
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/// Load tables from databases and add them to context. Database 'system' and 'information_schema' is ignored.
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/// Use separate function to load system tables.
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void loadMetadata(ContextMutablePtr context, const String & default_database_name = {});
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/// Background operations in system tables may slowdown loading of the rest tables,
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/// so we startup system tables after all databases are loaded.
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void startupSystemTables();
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/// Converts `system` database from Ordinary to Atomic (if needed)
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void maybeConvertSystemDatabase(ContextMutablePtr context);
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/// Converts all databases (except system) from Ordinary to Atomic if convert_ordinary_to_atomic flag exists
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void convertDatabasesEnginesIfNeed(ContextMutablePtr context);
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}
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