diff options
Diffstat (limited to 'odb/relational/mysql/schema.cxx')
| -rw-r--r-- | odb/relational/mysql/schema.cxx | 171 |
1 files changed, 69 insertions, 102 deletions
diff --git a/odb/relational/mysql/schema.cxx b/odb/relational/mysql/schema.cxx index 485fa9f..428db1c 100644 --- a/odb/relational/mysql/schema.cxx +++ b/odb/relational/mysql/schema.cxx @@ -20,143 +20,110 @@ namespace relational // Create. // - struct create_common: virtual relational::create_common + struct create_column: relational::create_column, context { - virtual void - create_table_post () - { - os << ")"; - - string const& engine (options.mysql_engine ()); - - if (engine != "default") - os << endl - << " ENGINE=" << engine; - - os << endl; - } - }; - - struct object_columns: relational::object_columns, context - { - object_columns (base const& x): base (x) {} + create_column (base const& x): base (x) {} virtual void - null (semantics::data_member& m) + null (sema_rel::column& c) { // MySQL TIMESTAMP is by default NOT NULL. If we want it // to contain NULL values, we need to explicitly declare // the column as NULL. // - if (context::null (m, prefix_) && - column_sql_type (m, prefix_).type == sql_type::TIMESTAMP) - os << " NULL"; - else - base::null (m); + if (c.null ()) + { + // This should never fail since we have already parsed this. + // + sql_type const& t (parse_sql_type (c.type ())); + + if (t.type == sql_type::TIMESTAMP) + { + os << " NULL"; + return; + } + } + + base::null (c); } virtual void - default_bool (semantics::data_member&, bool v) + auto_ (sema_rel::column&) { - // MySQL has TRUE and FALSE as just aliases for 1 and 0. Still - // use them for self-documentation. - // - os << " DEFAULT " << (v ? "TRUE" : "FALSE"); + os << " AUTO_INCREMENT"; } + }; + entry<create_column> create_column_; + + struct create_foreign_key: relational::create_foreign_key, context + { + create_foreign_key (base const& x): base (x) {} virtual void - default_enum (semantics::data_member& m, tree en, string const& name) + traverse (sema_rel::foreign_key& fk) { - // Make sure the column is mapped to an ENUM or integer type. + // MySQL does not support deferred constraint checking. Output + // such foreign keys as comments, for documentation, unless we + // are generating embedded schema. // - sql_type const& t (column_sql_type (m)); - - switch (t.type) - { - case sql_type::ENUM: - case sql_type::TINYINT: - case sql_type::SMALLINT: - case sql_type::MEDIUMINT: - case sql_type::INT: - case sql_type::BIGINT: - break; - default: - { - cerr << m.file () << ":" << m.line () << ":" << m.column () - << ": error: column with default value specified as C++ " - << "enumerator must map to MySQL ENUM or integer type" - << endl; - - throw operation_failed (); - } - } - - using semantics::enum_; - using semantics::enumerator; - - enumerator& er (dynamic_cast<enumerator&> (*unit.find (en))); - enum_& e (er.enum_ ()); - - if (t.type == sql_type::ENUM) + if (fk.deferred ()) { - // Assuming the enumerators in the C++ enum and MySQL ENUM are - // in the same order, calculate the poistion of the C++ - // enumerator and use that as an index in the MySQL ENUM. + // Don't bloat C++ code with comment strings if we are + // generating embedded schema. // - size_t pos (0); - - for (enum_::enumerates_iterator i (e.enumerates_begin ()), - end (e.enumerates_end ()); i != end; ++i) + if (format_ != schema_format::embedded) { - if (&i->enumerator () == &er) - break; - - pos++; - } + os << endl + << endl + << " /*" << endl; - if (pos < t.enumerators.size ()) - os << " DEFAULT " << t.enumerators[pos]; - else - { - cerr << m.file () << ":" << m.line () << ":" << m.column () - << ": error: unable to map C++ enumerator '" << name - << "' to MySQL ENUM value" << endl; + base::create (fk); - throw operation_failed (); + os << endl + << " */"; } } else - { - if (e.unsigned_ ()) - os << " DEFAULT " << er.value (); - else - os << " DEFAULT " << static_cast<long long> (er.value ()); - } + base::traverse (fk); } - virtual void - constraints (semantics::data_member& m) + virtual string + name (sema_rel::foreign_key& fk) { - base::constraints (m); - - if (m.count ("auto")) - os << " AUTO_INCREMENT"; + // In MySQL, foreign key names are database-global. Make them + // unique by prefixing the key name with table name. + // + return static_cast<sema_rel::table&> (fk.scope ()).name () + + '_' + fk.name (); } + virtual void + deferred () + { + // MySQL doesn't support deferred. + } }; - entry<object_columns> object_columns_; + entry<create_foreign_key> create_foreign_key_; - struct member_create: relational::member_create, create_common + struct create_table: relational::create_table, context { - member_create (base const& x): base (x) {} - }; - entry<member_create> member_create_; + create_table (base const& x): base (x) {} - struct class_create: relational::class_create, create_common - { - class_create (base const& x): base (x) {} + virtual void + create_post () + { + os << ")"; + + string const& engine (options.mysql_engine ()); + + if (engine != "default") + os << endl + << " ENGINE=" << engine; + + os << endl; + } }; - entry<class_create> class_create_; + entry<create_table> create_table_; } } } |