50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
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#ifndef DBS_DATABASE_SCHEMA_H
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#define DBS_DATABASE_SCHEMA_H
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#include "Algebras/DBService2/DatabaseAdapter.hpp"
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#include <string>
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namespace DBService {
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class DatabaseSchema {
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public:
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/*
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Creates the DBService database schema.
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Creates the given database if it doesn't exist already.
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Currently does not support database schema changes.
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TODO Add support for schema changes.
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*/
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static void migrate(std::string database);
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/*
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Truncate all Relations of the given Database.
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This method is part of DatabaseSchema as the operation requires
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knowledge about which relations to be truncated.
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All Records of all RecordTypes will be deleted but the Relations (Tables)
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remain intact.
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*/
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static void truncate(std::string database);
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private:
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/*
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Idempotent creation of relations.
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Creates a relation if it doesn't exist. Does nothing otherwise.
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*/
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template<typename RecordType>
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static void createRelation(std::string database,
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std::shared_ptr<DatabaseAdapter> adapter) {
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// Open the database and create the relation if it doesn't exist, yet.
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adapter->createRelation(
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database,
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RecordType::getRelationName(),
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RecordType::createRelationStatement()
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);
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}
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};
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}
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#endif
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