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Diffstat (limited to 'odb/odb/relational/mssql/context.hxx')
-rw-r--r-- | odb/odb/relational/mssql/context.hxx | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/odb/odb/relational/mssql/context.hxx b/odb/odb/relational/mssql/context.hxx new file mode 100644 index 0000000..7701aaa --- /dev/null +++ b/odb/odb/relational/mssql/context.hxx @@ -0,0 +1,194 @@ +// file : odb/relational/mssql/context.hxx +// license : GNU GPL v3; see accompanying LICENSE file + +#ifndef ODB_RELATIONAL_MSSQL_CONTEXT_HXX +#define ODB_RELATIONAL_MSSQL_CONTEXT_HXX + +#include <map> + +#include <odb/relational/context.hxx> + +namespace relational +{ + namespace mssql + { + struct sql_type + { + // Keep the order in each block of types. + // + enum core_type + { + // Integral types. + // + BIT, + TINYINT, + SMALLINT, + INT, + BIGINT, + + // Fixed and floating point types. + // + DECIMAL, + SMALLMONEY, + MONEY, + FLOAT, + + // String and binary types. + // + CHAR, + VARCHAR, + TEXT, + + NCHAR, + NVARCHAR, + NTEXT, + + BINARY, + VARBINARY, + IMAGE, + + // Date-time types. + // + DATE, + TIME, + DATETIME, + DATETIME2, + SMALLDATETIME, + DATETIMEOFFSET, + + // Other types. + // + UNIQUEIDENTIFIER, + ROWVERSION, + + // Invalid type. + // + invalid + }; + + sql_type () : + type (invalid), + has_prec (false), prec (0), + has_scale (false), scale (0) + { + } + + core_type type; + + bool has_prec; + unsigned short prec; // Max numeric value is 8000. 0 indicates + // 'max' as in VARCHAR(max). + bool has_scale; + unsigned short scale; // Max value is 38. + + // Conversion expressions for custom database types. + // + std::string to; + std::string from; + }; + + class context: public virtual relational::context + { + public: + sql_type const& + parse_sql_type (string const&, + semantics::data_member&, + bool custom = true); + + // Return true if this type is long data. + // + bool + long_data (sql_type const&); + + public: + struct invalid_sql_type + { + invalid_sql_type (string const& message): message_ (message) {} + + string const& + message () const {return message_;} + + private: + string message_; + }; + + // If custom_db_types is NULL, then this function returns + // invalid type instead of throwing in case an unknown type + // is encountered. + // + static sql_type + parse_sql_type (string const&, custom_db_types const* = 0); + + protected: + virtual string const& + convert_expr (string const&, semantics::data_member&, bool); + + virtual string + quote_id_impl (qname const&) const; + + protected: + virtual string + database_type_impl (semantics::type&, semantics::names*, bool, bool*); + + public: + virtual + ~context (); + + context (); + context (std::ostream&, + semantics::unit&, + options_type const&, + features_type&, + sema_rel::model*); + + static context& + current () + { + return *current_; + } + + private: + static context* current_; + + private: + struct data: base_context::data + { + data (std::ostream& os): base_context::data (os) {} + + struct sql_type_cache_entry + { + sql_type_cache_entry () + : custom_cached (false), straight_cached (false) {} + + sql_type const& + cache_custom (sql_type const& t) + { + custom = t; + custom_cached = true; + return custom; + } + + sql_type const& + cache_straight (sql_type const& t) + { + straight = t; + straight_cached = true; + return straight; + } + + sql_type custom; // With custom mapping. + sql_type straight; // Without custom mapping. + + bool custom_cached; + bool straight_cached; + }; + + typedef std::map<string, sql_type_cache_entry> sql_type_cache; + sql_type_cache sql_type_cache_; + }; + data* data_; + }; + } +} + +#endif // ODB_RELATIONAL_MSSQL_CONTEXT_HXX |