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Diffstat (limited to 'odb/sqlite/query.hxx')
| -rw-r--r-- | odb/sqlite/query.hxx | 1728 |
1 files changed, 0 insertions, 1728 deletions
diff --git a/odb/sqlite/query.hxx b/odb/sqlite/query.hxx deleted file mode 100644 index c9cbfaa..0000000 --- a/odb/sqlite/query.hxx +++ /dev/null @@ -1,1728 +0,0 @@ -// file : odb/sqlite/query.hxx -// license : GNU GPL v2; see accompanying LICENSE file - -#ifndef ODB_SQLITE_QUERY_HXX -#define ODB_SQLITE_QUERY_HXX - -#include <odb/pre.hxx> - -#include <string> -#include <vector> -#include <cstddef> // std::size_t - -#include <odb/forward.hxx> // odb::query_column -#include <odb/query.hxx> -#include <odb/details/buffer.hxx> -#include <odb/details/shared-ptr.hxx> - -#include <odb/sqlite/version.hxx> -#include <odb/sqlite/forward.hxx> -#include <odb/sqlite/traits.hxx> -#include <odb/sqlite/sqlite-types.hxx> -#include <odb/sqlite/binding.hxx> - -#include <odb/sqlite/details/export.hxx> -#include <odb/sqlite/details/conversion.hxx> - -namespace odb -{ - namespace sqlite - { - template <typename T> - struct val_bind - { - typedef const T& type; - - explicit - val_bind (type v): val (v) {} - - type val; - }; - - template <typename T, std::size_t N> - struct val_bind<T[N]> - { - typedef const T* type; - - explicit - val_bind (type v): val (v) {} - - type val; - }; - - template <typename T> - struct ref_bind - { - typedef const T& type; - - explicit - ref_bind (type r): ref (r) {} - - const void* - ptr () const {return &ref;} - - type ref; - }; - - template <typename T, std::size_t N> - struct ref_bind<T[N]> - { - typedef const T* type; - - explicit - ref_bind (type r): ref (r) {} - - // Allow implicit conversion from decayed ref_bind's. - // - ref_bind (ref_bind<T*> r): ref (r.ref) {} - ref_bind (ref_bind<const T*> r): ref (r.ref) {} - - const void* - ptr () const {return ref;} - - type ref; - }; - - template <typename T, database_type_id ID> - struct val_bind_typed: val_bind<T> - { - explicit - val_bind_typed (typename val_bind<T>::type v): val_bind<T> (v) {} - }; - - template <typename T, database_type_id ID> - struct ref_bind_typed: ref_bind<T> - { - explicit - ref_bind_typed (typename ref_bind<T>::type r): ref_bind<T> (r) {} - }; - - struct LIBODB_SQLITE_EXPORT query_param: details::shared_base - { - virtual - ~query_param (); - - bool - reference () const - { - return value_ != 0; - } - - virtual bool - init () = 0; - - virtual void - bind (sqlite::bind*) = 0; - - protected: - query_param (const void* value) - : value_ (value) - { - } - - protected: - const void* value_; - }; - - class query_base; - - class LIBODB_SQLITE_EXPORT query_params: public details::shared_base - { - public: - typedef sqlite::binding binding_type; - - void - init (); - - binding_type& - binding () {return binding_;} - - private: - friend class query_base; - - query_params (): binding_ (0, 0) {} - query_params (const query_params&); - - query_params& - operator= (const query_params&); - - query_params& - operator+= (const query_params&); - - void - add (details::shared_ptr<query_param>); - - private: - typedef std::vector<details::shared_ptr<query_param> > params; - - params params_; - std::vector<sqlite::bind> bind_; - binding_type binding_; - }; - - // - // - template <typename T, database_type_id ID> - struct query_column; - - class LIBODB_SQLITE_EXPORT query_base - { - public: - struct clause_part - { - enum kind_type - { - kind_column, - kind_param, - kind_native, - kind_bool - }; - - clause_part (kind_type k): kind (k), bool_part (false) {} - clause_part (kind_type k, const std::string& p) - : kind (k), part (p), bool_part (false) {} - clause_part (bool p): kind (kind_bool), bool_part (p) {} - - kind_type kind; - std::string part; // If kind is param, then part is conversion expr. - bool bool_part; - }; - - query_base () - : parameters_ (new (details::shared) query_params) - { - } - - // True or false literal. - // - explicit - query_base (bool v) - : parameters_ (new (details::shared) query_params) - { - append (v); - } - - explicit - query_base (const char* native) - : parameters_ (new (details::shared) query_params) - { - clause_.push_back (clause_part (clause_part::kind_native, native)); - } - - explicit - query_base (const std::string& native) - : parameters_ (new (details::shared) query_params) - { - clause_.push_back (clause_part (clause_part::kind_native, native)); - } - - query_base (const char* table, const char* column) - : parameters_ (new (details::shared) query_params) - { - append (table, column); - } - - template <typename T> - explicit - query_base (val_bind<T> v) - : parameters_ (new (details::shared) query_params) - { - *this += v; - } - - template <typename T, database_type_id ID> - explicit - query_base (val_bind_typed<T, ID> v) - : parameters_ (new (details::shared) query_params) - { - *this += v; - } - - template <typename T> - explicit - query_base (ref_bind<T> r) - : parameters_ (new (details::shared) query_params) - { - *this += r; - } - - template <typename T, database_type_id ID> - explicit - query_base (ref_bind_typed<T, ID> r) - : parameters_ (new (details::shared) query_params) - { - *this += r; - } - - template <database_type_id ID> - query_base (const query_column<bool, ID>&); - - // Translate common query representation to SQLite native. Defined - // in query-dynamic.cxx - // - query_base (const odb::query_base&); - - // Copy c-tor and assignment. - // - query_base (const query_base&); - - query_base& - operator= (const query_base&); - - public: - std::string - clause () const; - - const char* - clause_prefix () const; - - // Initialize the by-reference parameters from bound variables. - // - void - init_parameters () const; - - binding& - parameters_binding () const; - - const details::shared_ptr<query_params>& - parameters () const; - - public: - bool - empty () const - { - return clause_.empty (); - } - - static const query_base true_expr; - - bool - const_true () const - { - return clause_.size () == 1 && - clause_.front ().kind == clause_part::kind_bool && - clause_.front ().bool_part; - } - - void - optimize (); - - public: - template <typename T> - static val_bind<T> - _val (const T& x) - { - return val_bind<T> (x); - } - - template <database_type_id ID, typename T> - static val_bind_typed<T, ID> - _val (const T& x) - { - return val_bind_typed<T, ID> (x); - } - - template <typename T> - static ref_bind<T> - _ref (const T& x) - { - return ref_bind<T> (x); - } - - template <database_type_id ID, typename T> - static ref_bind_typed<T, ID> - _ref (const T& x) - { - return ref_bind_typed<T, ID> (x); - } - - // Some compilers (notably VC++), when deducing const T& from const - // array do not strip const from the array type. As a result, in the - // above signatures we get, for example, T = const char[4] instead - // of T = char[4], which is what we want. So to "fix" such compilers, - // we will have to provide the following specializations of the above - // functions. - // - template <typename T, std::size_t N> - static val_bind<T[N]> - _val (const T (&x) [N]) - { - return val_bind<T[N]> (x); - } - - template <database_type_id ID, typename T, std::size_t N> - static val_bind_typed<T[N], ID> - _val (const T (&x) [N]) - { - return val_bind_typed<T[N], ID> (x); - } - - template <typename T, std::size_t N> - static ref_bind<T[N]> - _ref (const T (&x) [N]) - { - return ref_bind<T[N]> (x); - } - - template <database_type_id ID, typename T, std::size_t N> - static ref_bind_typed<T[N], ID> - _ref (const T (&x) [N]) - { - return ref_bind_typed<T[N], ID> (x); - } - - public: - query_base& - operator+= (const query_base&); - - query_base& - operator+= (const std::string& q) - { - append (q); - return *this; - } - - template <typename T> - query_base& - operator+= (val_bind<T> v) - { - append<T, type_traits<T>::db_type_id> ( - v, details::conversion<T>::to ()); - return *this; - } - - template <typename T, database_type_id ID> - query_base& - operator+= (val_bind_typed<T, ID> v) - { - // We are not using default type_traits so no default conversion - // either. - // - append<T, ID> (v, 0); - return *this; - } - - template <typename T> - query_base& - operator+= (ref_bind<T> r) - { - append<T, type_traits<T>::db_type_id> ( - r, details::conversion<T>::to ()); - return *this; - } - - template <typename T, database_type_id ID> - query_base& - operator+= (ref_bind_typed<T, ID> r) - { - // We are not using default type_traits so no default conversion - // either. - // - append<T, ID> (r, 0); - return *this; - } - - // Implementation details. - // - public: - template <typename T, database_type_id ID> - void - append (val_bind<T>, const char* conv); - - template <typename T, database_type_id ID> - void - append (ref_bind<T>, const char* conv); - - void - append (details::shared_ptr<query_param>, const char* conv); - - void - append (bool v) - { - clause_.push_back (clause_part (v)); - } - - void - append (const std::string& native); - - void - append (const char* native) // Clashes with append(bool). - { - append (std::string (native)); - } - - void - append (const char* table, const char* column); - - private: - typedef std::vector<clause_part> clause_type; - - clause_type clause_; - details::shared_ptr<query_params> parameters_; - }; - - inline query_base - operator+ (const query_base& x, const query_base& y) - { - query_base r (x); - r += y; - return r; - } - - template <typename T> - inline query_base - operator+ (const query_base& q, val_bind<T> b) - { - query_base r (q); - r += b; - return r; - } - - template <typename T> - inline query_base - operator+ (val_bind<T> b, const query_base& q) - { - query_base r; - r += b; - r += q; - return r; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (const query_base& q, val_bind_typed<T, ID> b) - { - query_base r (q); - r += b; - return r; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (val_bind_typed<T, ID> b, const query_base& q) - { - query_base r; - r += b; - r += q; - return r; - } - - template <typename T> - inline query_base - operator+ (const query_base& q, ref_bind<T> b) - { - query_base r (q); - r += b; - return r; - } - - template <typename T> - inline query_base - operator+ (ref_bind<T> b, const query_base& q) - { - query_base r; - r += b; - r += q; - return r; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (const query_base& q, ref_bind_typed<T, ID> b) - { - query_base r (q); - r += b; - return r; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (ref_bind_typed<T, ID> b, const query_base& q) - { - query_base r; - r += b; - r += q; - return r; - } - - inline query_base - operator+ (const query_base& q, const std::string& s) - { - query_base r (q); - r += s; - return r; - } - - inline query_base - operator+ (const std::string& s, const query_base& q) - { - query_base r (s); - r += q; - return r; - } - - template <typename T> - inline query_base - operator+ (const std::string& s, val_bind<T> b) - { - query_base r (s); - r += b; - return r; - } - - template <typename T> - inline query_base - operator+ (val_bind<T> b, const std::string& s) - { - query_base r; - r += b; - r += s; - return r; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (const std::string& s, val_bind_typed<T, ID> b) - { - query_base r (s); - r += b; - return r; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (val_bind_typed<T, ID> b, const std::string& s) - { - query_base r; - r += b; - r += s; - return r; - } - - template <typename T> - inline query_base - operator+ (const std::string& s, ref_bind<T> b) - { - query_base r (s); - r += b; - return r; - } - - template <typename T> - inline query_base - operator+ (ref_bind<T> b, const std::string& s) - { - query_base r; - r += b; - r += s; - return r; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (const std::string& s, ref_bind_typed<T, ID> b) - { - query_base r (s); - r += b; - return r; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (ref_bind_typed<T, ID> b, const std::string& s) - { - query_base r; - r += b; - r += s; - return r; - } - - LIBODB_SQLITE_EXPORT query_base - operator&& (const query_base&, const query_base&); - - LIBODB_SQLITE_EXPORT query_base - operator|| (const query_base&, const query_base&); - - LIBODB_SQLITE_EXPORT query_base - operator! (const query_base&); - - // query_column - // - struct query_column_base - { - // Note that we keep shallow copies of the table, column, and conversion - // expression. The latter can be NULL. - // - query_column_base (const char* table, - const char* column, - const char* conv) - : table_ (table), column_ (column), conversion_ (conv) - { - } - - const char* - table () const - { - return table_; - } - - const char* - column () const - { - return column_; - } - - // Can be NULL. - // - const char* - conversion () const - { - return conversion_; - } - - protected: - const char* table_; - const char* column_; - const char* conversion_; - }; - - template <typename T, database_type_id ID> - struct query_column: query_column_base - { - typedef typename decay_traits<T>::type decayed_type; - - // Note that we keep shallow copies of the table, column, and conversion - // expression. The latter can be NULL. - // - query_column (const char* table, const char* column, const char* conv) - : query_column_base (table, column, conv) {} - - // Implementation is in query-dynamic.ixx. - // - query_column (odb::query_column<T>&, - const char* table, const char* column, const char* conv); - - // is_null, is_not_null - // - public: - query_base - is_null () const - { - query_base q (table_, column_); - q += "IS NULL"; - return q; - } - - query_base - is_not_null () const - { - query_base q (table_, column_); - q += "IS NOT NULL"; - return q; - } - - // in - // - public: - query_base - in (decayed_type, decayed_type) const; - - query_base - in (decayed_type, decayed_type, decayed_type) const; - - query_base - in (decayed_type, decayed_type, decayed_type, decayed_type) const; - - query_base - in (decayed_type, decayed_type, decayed_type, decayed_type, - decayed_type) const; - - template <typename I> - query_base - in_range (I begin, I end) const; - - // like - // - public: - query_base - like (decayed_type pattern) const - { - return like (val_bind<T> (pattern)); - } - - query_base - like (val_bind<T> pattern) const; - - template <typename T2> - query_base - like (val_bind<T2> pattern) const - { - return like (val_bind<T> (decayed_type (pattern.val))); - } - - query_base - like (ref_bind<T> pattern) const; - - query_base - like (decayed_type pattern, decayed_type escape) const - { - return like (val_bind<T> (pattern), escape); - } - - query_base - like (val_bind<T> pattern, decayed_type escape) const; - - template <typename T2> - query_base - like (val_bind<T2> pattern, decayed_type escape) const - { - return like (val_bind<T> (decayed_type (pattern.val)), escape); - } - - query_base - like (ref_bind<T> pattern, decayed_type escape) const; - - // = - // - public: - query_base - equal (decayed_type v) const - { - return equal (val_bind<T> (v)); - } - - query_base - equal (val_bind<T> v) const - { - query_base q (table_, column_); - q += "="; - q.append<T, ID> (v, conversion_); - return q; - } - - template <typename T2> - query_base - equal (val_bind<T2> v) const - { - return equal (val_bind<T> (decayed_type (v.val))); - } - - query_base - equal (ref_bind<T> r) const - { - query_base q (table_, column_); - q += "="; - q.append<T, ID> (r, conversion_); - return q; - } - - friend query_base - operator== (const query_column& c, decayed_type v) - { - return c.equal (v); - } - - friend query_base - operator== (decayed_type v, const query_column& c) - { - return c.equal (v); - } - - friend query_base - operator== (const query_column& c, val_bind<T> v) - { - return c.equal (v); - } - - friend query_base - operator== (val_bind<T> v, const query_column& c) - { - return c.equal (v); - } - - template <typename T2> - friend query_base - operator== (const query_column& c, val_bind<T2> v) - { - return c.equal (v); - } - - template <typename T2> - friend query_base - operator== (val_bind<T2> v, const query_column& c) - { - return c.equal (v); - } - - friend query_base - operator== (const query_column& c, ref_bind<T> r) - { - return c.equal (r); - } - - friend query_base - operator== (ref_bind<T> r, const query_column& c) - { - return c.equal (r); - } - - // != - // - public: - query_base - unequal (decayed_type v) const - { - return unequal (val_bind<T> (v)); - } - - query_base - unequal (val_bind<T> v) const - { - query_base q (table_, column_); - q += "!="; - q.append<T, ID> (v, conversion_); - return q; - } - - template <typename T2> - query_base - unequal (val_bind<T2> v) const - { - return unequal (val_bind<T> (decayed_type (v.val))); - } - - query_base - unequal (ref_bind<T> r) const - { - query_base q (table_, column_); - q += "!="; - q.append<T, ID> (r, conversion_); - return q; - } - - friend query_base - operator!= (const query_column& c, decayed_type v) - { - return c.unequal (v); - } - - friend query_base - operator!= (decayed_type v, const query_column& c) - { - return c.unequal (v); - } - - friend query_base - operator!= (const query_column& c, val_bind<T> v) - { - return c.unequal (v); - } - - friend query_base - operator!= (val_bind<T> v, const query_column& c) - { - return c.unequal (v); - } - - template <typename T2> - friend query_base - operator!= (const query_column& c, val_bind<T2> v) - { - return c.unequal (v); - } - - template <typename T2> - friend query_base - operator!= (val_bind<T2> v, const query_column& c) - { - return c.unequal (v); - } - - friend query_base - operator!= (const query_column& c, ref_bind<T> r) - { - return c.unequal (r); - } - - friend query_base - operator!= (ref_bind<T> r, const query_column& c) - { - return c.unequal (r); - } - - // < - // - public: - query_base - less (decayed_type v) const - { - return less (val_bind<T> (v)); - } - - query_base - less (val_bind<T> v) const - { - query_base q (table_, column_); - q += "<"; - q.append<T, ID> (v, conversion_); - return q; - } - - template <typename T2> - query_base - less (val_bind<T2> v) const - { - return less (val_bind<T> (decayed_type (v.val))); - } - - query_base - less (ref_bind<T> r) const - { - query_base q (table_, column_); - q += "<"; - q.append<T, ID> (r, conversion_); - return q; - } - - friend query_base - operator< (const query_column& c, decayed_type v) - { - return c.less (v); - } - - friend query_base - operator< (decayed_type v, const query_column& c) - { - return c.greater (v); - } - - friend query_base - operator< (const query_column& c, val_bind<T> v) - { - return c.less (v); - } - - friend query_base - operator< (val_bind<T> v, const query_column& c) - { - return c.greater (v); - } - - template <typename T2> - friend query_base - operator< (const query_column& c, val_bind<T2> v) - { - return c.less (v); - } - - template <typename T2> - friend query_base - operator< (val_bind<T2> v, const query_column& c) - { - return c.greater (v); - } - - friend query_base - operator< (const query_column& c, ref_bind<T> r) - { - return c.less (r); - } - - friend query_base - operator< (ref_bind<T> r, const query_column& c) - { - return c.greater (r); - } - - // > - // - public: - query_base - greater (decayed_type v) const - { - return greater (val_bind<T> (v)); - } - - query_base - greater (val_bind<T> v) const - { - query_base q (table_, column_); - q += ">"; - q.append<T, ID> (v, conversion_); - return q; - } - - template <typename T2> - query_base - greater (val_bind<T2> v) const - { - return greater (val_bind<T> (decayed_type (v.val))); - } - - query_base - greater (ref_bind<T> r) const - { - query_base q (table_, column_); - q += ">"; - q.append<T, ID> (r, conversion_); - return q; - } - - friend query_base - operator> (const query_column& c, decayed_type v) - { - return c.greater (v); - } - - friend query_base - operator> (decayed_type v, const query_column& c) - { - return c.less (v); - } - - friend query_base - operator> (const query_column& c, val_bind<T> v) - { - return c.greater (v); - } - - friend query_base - operator> (val_bind<T> v, const query_column& c) - { - return c.less (v); - } - - template <typename T2> - friend query_base - operator> (const query_column& c, val_bind<T2> v) - { - return c.greater (v); - } - - template <typename T2> - friend query_base - operator> (val_bind<T2> v, const query_column& c) - { - return c.less (v); - } - - friend query_base - operator> (const query_column& c, ref_bind<T> r) - { - return c.greater (r); - } - - friend query_base - operator> (ref_bind<T> r, const query_column& c) - { - return c.less (r); - } - - // <= - // - public: - query_base - less_equal (decayed_type v) const - { - return less_equal (val_bind<T> (v)); - } - - query_base - less_equal (val_bind<T> v) const - { - query_base q (table_, column_); - q += "<="; - q.append<T, ID> (v, conversion_); - return q; - } - - template <typename T2> - query_base - less_equal (val_bind<T2> v) const - { - return less_equal (val_bind<T> (decayed_type (v.val))); - } - - query_base - less_equal (ref_bind<T> r) const - { - query_base q (table_, column_); - q += "<="; - q.append<T, ID> (r, conversion_); - return q; - } - - friend query_base - operator<= (const query_column& c, decayed_type v) - { - return c.less_equal (v); - } - - friend query_base - operator<= (decayed_type v, const query_column& c) - { - return c.greater_equal (v); - } - - friend query_base - operator<= (const query_column& c, val_bind<T> v) - { - return c.less_equal (v); - } - - friend query_base - operator<= (val_bind<T> v, const query_column& c) - { - return c.greater_equal (v); - } - - template <typename T2> - friend query_base - operator<= (const query_column& c, val_bind<T2> v) - { - return c.less_equal (v); - } - - template <typename T2> - friend query_base - operator<= (val_bind<T2> v, const query_column& c) - { - return c.greater_equal (v); - } - - friend query_base - operator<= (const query_column& c, ref_bind<T> r) - { - return c.less_equal (r); - } - - friend query_base - operator<= (ref_bind<T> r, const query_column& c) - { - return c.greater_equal (r); - } - - // >= - // - public: - query_base - greater_equal (decayed_type v) const - { - return greater_equal (val_bind<T> (v)); - } - - query_base - greater_equal (val_bind<T> v) const - { - query_base q (table_, column_); - q += ">="; - q.append<T, ID> (v, conversion_); - return q; - } - - template <typename T2> - query_base - greater_equal (val_bind<T2> v) const - { - return greater_equal (val_bind<T> (decayed_type (v.val))); - } - - query_base - greater_equal (ref_bind<T> r) const - { - query_base q (table_, column_); - q += ">="; - q.append<T, ID> (r, conversion_); - return q; - } - - friend query_base - operator>= (const query_column& c, decayed_type v) - { - return c.greater_equal (v); - } - - friend query_base - operator>= (decayed_type v, const query_column& c) - { - return c.less_equal (v); - } - - friend query_base - operator>= (const query_column& c, val_bind<T> v) - { - return c.greater_equal (v); - } - - friend query_base - operator>= (val_bind<T> v, const query_column& c) - { - return c.less_equal (v); - } - - template <typename T2> - friend query_base - operator>= (const query_column& c, val_bind<T2> v) - { - return c.greater_equal (v); - } - - template <typename T2> - friend query_base - operator>= (val_bind<T2> v, const query_column& c) - { - return c.less_equal (v); - } - - friend query_base - operator>= (const query_column& c, ref_bind<T> r) - { - return c.greater_equal (r); - } - - friend query_base - operator>= (ref_bind<T> r, const query_column& c) - { - return c.less_equal (r); - } - - // Column comparison. - // - public: - template <typename T2, database_type_id ID2> - query_base - operator== (const query_column<T2, ID2>& c) const - { - // We can compare columns only if we can compare their C++ types. - // - (void) (sizeof (decay_traits<T>::instance () == - decay_traits<T2>::instance ())); - - query_base q (table_, column_); - q += "="; - q.append (c.table (), c.column ()); - return q; - } - - template <typename T2, database_type_id ID2> - query_base - operator!= (const query_column<T2, ID2>& c) const - { - // We can compare columns only if we can compare their C++ types. - // - (void) (sizeof (decay_traits<T>::instance () != - decay_traits<T2>::instance ())); - - query_base q (table_, column_); - q += "!="; - q.append (c.table (), c.column ()); - return q; - } - - template <typename T2, database_type_id ID2> - query_base - operator< (const query_column<T2, ID2>& c) const - { - // We can compare columns only if we can compare their C++ types. - // - (void) (sizeof (decay_traits<T>::instance () < - decay_traits<T2>::instance ())); - - query_base q (table_, column_); - q += "<"; - q.append (c.table (), c.column ()); - return q; - } - - template <typename T2, database_type_id ID2> - query_base - operator> (const query_column<T2, ID2>& c) const - { - // We can compare columns only if we can compare their C++ types. - // - (void) (sizeof (decay_traits<T>::instance () > - decay_traits<T2>::instance ())); - - query_base q (table_, column_); - q += ">"; - q.append (c.table (), c.column ()); - return q; - } - - template <typename T2, database_type_id ID2> - query_base - operator<= (const query_column<T2, ID2>& c) const - { - // We can compare columns only if we can compare their C++ types. - // - (void) (sizeof (decay_traits<T>::instance () <= - decay_traits<T2>::instance ())); - - query_base q (table_, column_); - q += "<="; - q.append (c.table (), c.column ()); - return q; - } - - template <typename T2, database_type_id ID2> - query_base - operator>= (const query_column<T2, ID2>& c) const - { - // We can compare columns only if we can compare their C++ types. - // - (void) (sizeof (decay_traits<T>::instance () >= - decay_traits<T2>::instance ())); - - query_base q (table_, column_); - q += ">="; - q.append (c.table (), c.column ()); - return q; - } - }; - - // Provide operator+() for using columns to construct native - // query fragments (e.g., ORDER BY). - // - template <typename T, database_type_id ID> - inline query_base - operator+ (const query_column<T, ID>& c, const std::string& s) - { - query_base q (c.table (), c.column ()); - q += s; - return q; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (const std::string& s, const query_column<T, ID>& c) - { - query_base q (s); - q.append (c.table (), c.column ()); - return q; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (const query_column<T, ID>& c, const query_base& q) - { - query_base r (c.table (), c.column ()); - r += q; - return r; - } - - template <typename T, database_type_id ID> - inline query_base - operator+ (const query_base& q, const query_column<T, ID>& c) - { - query_base r (q); - r.append (c.table (), c.column ()); - return r; - } - - // - // - template <typename T, database_type_id> - struct query_param_impl; - - // INTEGER - // - template <typename T> - struct query_param_impl<T, id_integer>: query_param - { - query_param_impl (ref_bind<T> r) : query_param (r.ptr ()) {} - query_param_impl (val_bind<T> v) : query_param (0) {init (v.val);} - - virtual bool - init () - { - init (*static_cast<const T*> (value_)); - return false; - } - - virtual void - bind (sqlite::bind* b) - { - b->type = sqlite::bind::integer; - b->buffer = &image_; - } - - private: - void - init (typename decay_traits<T>::type v) - { - bool is_null (false); // Can't be NULL. - value_traits<T, id_integer>::set_image (image_, is_null, v); - } - - private: - long long image_; - }; - - // REAL - // - template <typename T> - struct query_param_impl<T, id_real>: query_param - { - query_param_impl (ref_bind<T> r) : query_param (r.ptr ()) {} - query_param_impl (val_bind<T> v) : query_param (0) {init (v.val);} - - virtual bool - init () - { - init (*static_cast<const T*> (value_)); - return false; - } - - virtual void - bind (sqlite::bind* b) - { - b->type = sqlite::bind::real; - b->buffer = &image_; - } - - private: - void - init (typename decay_traits<T>::type v) - { - bool is_null (false); // Can't be NULL. - value_traits<T, id_real>::set_image (image_, is_null, v); - } - - private: - double image_; - }; - - // TEXT - // - template <typename T> - struct query_param_impl<T, id_text>: query_param - { - query_param_impl (ref_bind<T> r) : query_param (r.ptr ()) {} - query_param_impl (val_bind<T> v) : query_param (0) {init (v.val);} - - virtual bool - init () - { - return init (*static_cast<const T*> (value_)); - } - - virtual void - bind (sqlite::bind* b) - { - b->type = image_traits<T, id_text>::bind_value; - b->buffer = buffer_.data (); - b->size = &size_; - } - - private: - bool - init (typename decay_traits<T>::type v) - { - bool is_null (false); // Can't be NULL. - std::size_t cap (buffer_.capacity ()); - value_traits<T, id_text>::set_image (buffer_, size_, is_null, v); - return cap != buffer_.capacity (); - } - - private: - details::buffer buffer_; - std::size_t size_; - }; - - // BLOB - // - template <typename T> - struct query_param_impl<T, id_blob>: query_param - { - query_param_impl (ref_bind<T> r) : query_param (r.ptr ()) {} - query_param_impl (val_bind<T> v) : query_param (0) {init (v.val);} - - virtual bool - init () - { - return init (*static_cast<const T*> (value_)); - } - - virtual void - bind (sqlite::bind* b) - { - b->type = sqlite::bind::blob; - b->buffer = buffer_.data (); - b->size = &size_; - } - - private: - bool - init (typename decay_traits<T>::type v) - { - bool is_null (false); // Can't be NULL. - std::size_t cap (buffer_.capacity ()); - value_traits<T, id_blob>::set_image (buffer_, size_, is_null, v); - return cap != buffer_.capacity (); - } - - private: - details::buffer buffer_; - std::size_t size_; - }; - - // TEXT STREAM (reduce to id_text). - // - template <typename T> - struct query_param_impl<T, id_text_stream>: query_param_impl<T, id_text> - { - query_param_impl (ref_bind<T> r) : query_param_impl<T, id_text> (r) {} - query_param_impl (val_bind<T> v) : query_param_impl<T, id_text> (v) {} - }; - - // BLOB STREAM (reduce to id_blob). - // - template <typename T> - struct query_param_impl<T, id_blob_stream>: query_param_impl<T, id_blob> - { - query_param_impl (ref_bind<T> r) : query_param_impl<T, id_blob> (r) {} - query_param_impl (val_bind<T> v) : query_param_impl<T, id_blob> (v) {} - }; - } -} - -// odb::sqlite::query and odb::query specialization for SQLite. -// -namespace odb -{ - namespace sqlite - { - template <typename T> - class query: public query_base, - public query_selector<T, id_sqlite>::columns_type - { - public: - // We don't define any typedefs here since they may clash with - // column names defined by our base type. - // - - query () - { - } - - explicit - query (bool v) - : query_base (v) - { - } - - explicit - query (const char* q) - : query_base (q) - { - } - - explicit - query (const std::string& q) - : query_base (q) - { - } - - template <typename T2> - explicit - query (val_bind<T2> v) - : query_base (v) - { - } - - template <typename T2> - explicit - query (ref_bind<T2> r) - : query_base (r) - { - } - - query (const query_base& q) - : query_base (q) - { - } - - template <database_type_id ID> - query (const query_column<bool, ID>& qc) - : query_base (qc) - { - } - - query (const odb::query_base& q) - : query_base (q) - { - } - }; - - namespace core - { - using sqlite::query; - } - } - - // Derive odb::query from odb::sqlite::query so that it can be - // implicitly converted in sqlite::database::query() calls. - // - template <typename T> - class query<T, sqlite::query_base>: public sqlite::query<T> - { - public: - // We don't define any typedefs here since they may clash with - // column names defined by our base type. - // - - query () - { - } - - explicit - query (bool v) - : sqlite::query<T> (v) - { - } - - explicit - query (const char* q) - : sqlite::query<T> (q) - { - } - - explicit - query (const std::string& q) - : sqlite::query<T> (q) - { - } - - template <typename T2> - explicit - query (sqlite::val_bind<T2> v) - : sqlite::query<T> (v) - { - } - - template <typename T2> - explicit - query (sqlite::ref_bind<T2> r) - : sqlite::query<T> (r) - { - } - - query (const sqlite::query_base& q) - : sqlite::query<T> (q) - { - } - - template <sqlite::database_type_id ID> - query (const sqlite::query_column<bool, ID>& qc) - : sqlite::query<T> (qc) - { - } - }; -} - -#include <odb/sqlite/query.ixx> -#include <odb/sqlite/query.txx> - -#include <odb/post.hxx> - -#endif // ODB_SQLITE_QUERY_HXX |