diff options
Diffstat (limited to 'libodb-oracle/odb/oracle/query.hxx')
| -rw-r--r-- | libodb-oracle/odb/oracle/query.hxx | 2261 |
1 files changed, 2261 insertions, 0 deletions
diff --git a/libodb-oracle/odb/oracle/query.hxx b/libodb-oracle/odb/oracle/query.hxx new file mode 100644 index 0000000..a1cbd80 --- /dev/null +++ b/libodb-oracle/odb/oracle/query.hxx @@ -0,0 +1,2261 @@ +// file : odb/oracle/query.hxx +// license : ODB NCUEL; see accompanying LICENSE file + +#ifndef ODB_ORACLE_QUERY_HXX +#define ODB_ORACLE_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/oracle/version.hxx> +#include <odb/oracle/forward.hxx> +#include <odb/oracle/traits.hxx> +#include <odb/oracle/binding.hxx> + +#include <odb/details/buffer.hxx> +#include <odb/details/shared-ptr.hxx> + +#include <odb/oracle/details/export.hxx> +#include <odb/oracle/details/conversion.hxx> + +namespace odb +{ + namespace oracle + { + // For both precision and scale 0 is a valid value. Furthermore, + // scale can be negative. To indicate that these values are not + // specified, we will use 0xFFF which is out of range for both + // precision (0 to 4000) and scale (-84 to 127). Note also that + // string size (stored in precision) is always in bytes. If a + // national string size is specified as a number of characters + // and not bytes, then this will be a conservative estimate (4 + // bytes per character). + // + template <typename T> + struct val_bind + { + typedef const T& type; + + explicit + val_bind (type v, unsigned short p = 0xFFF, short s = 0xFFF) + : val (v), prec (p), scale (s) {} + + type val; + + unsigned short prec; + short scale; + }; + + template <typename T, std::size_t N> + struct val_bind<T[N]> + { + typedef const T* type; + + explicit + val_bind (type v, unsigned short p = 0xFFF, short s = 0xFFF) + : val (v), prec (p), scale (s) {} + + type val; + + unsigned short prec; + short scale; + }; + + template <typename T> + struct ref_bind + { + typedef const T& type; + + explicit + ref_bind (type r, unsigned short p = 0xFFF, short s = 0xFFF) + : ref (r), prec (p), scale (s) {} + + const void* + ptr () const {return &ref;} + + type ref; + + unsigned short prec; + short scale; + }; + + template <typename T, std::size_t N> + struct ref_bind<T[N]> + { + typedef const T* type; + + explicit + ref_bind (type r, unsigned short p = 0xFFF, short s = 0xFFF) + : ref (r), prec (p), scale (s) {} + + // Allow implicit conversion from decayed ref_bind's. + // + ref_bind (ref_bind<T*> r): ref (r.ref), prec (r.prec), scale (r.scale) {} + ref_bind (ref_bind<const T*> r) + : ref (r.ref), prec (r.prec), scale (r.scale) {} + + const void* + ptr () const {return ref;} + + type ref; + + unsigned short prec; + short scale; + }; + + template <typename T, database_type_id ID> + struct val_bind_typed: val_bind<T> + { + explicit + val_bind_typed (typename val_bind<T>::type v, + unsigned short p = 0xFFF, + short s = 0xFFF): val_bind<T> (v, p, s) {} + }; + + template <typename T, database_type_id ID> + struct ref_bind_typed: ref_bind<T> + { + explicit + ref_bind_typed (typename ref_bind<T>::type r, + unsigned short p = 0xFFF, + short s = 0xFFF): ref_bind<T> (r, p, s) {} + }; + + struct LIBODB_ORACLE_EXPORT query_param: details::shared_base + { + typedef oracle::bind bind_type; + + virtual + ~query_param (); + + bool + reference () const + { + return value_ != 0; + } + + virtual bool + init () = 0; + + virtual void + bind (bind_type*) = 0; + + protected: + query_param (const void* value) + : value_ (value) + { + } + + protected: + const void* value_; + }; + + // + // + template <typename T, database_type_id ID> + struct query_column; + + class LIBODB_ORACLE_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 () + : binding_ (0, 0) + { + } + + // True or false literal. + // + explicit + query_base (bool v) + : binding_ (0, 0) + { + append (v); + } + + explicit + query_base (const char* native) + : binding_ (0, 0) + { + clause_.push_back (clause_part (clause_part::kind_native, native)); + } + + explicit + query_base (const std::string& native) + : binding_ (0, 0) + { + clause_.push_back (clause_part (clause_part::kind_native, native)); + } + + query_base (const char* table, const char* column) + : binding_ (0, 0) + { + append (table, column); + } + + template <typename T> + explicit + query_base (val_bind<T> v) + : binding_ (0, 0) + { + *this += v; + } + + template <typename T, database_type_id ID> + explicit + query_base (val_bind_typed<T, ID> v) + : binding_ (0, 0) + { + *this += v; + } + + template <typename T> + explicit + query_base (ref_bind<T> r) + : binding_ (0, 0) + { + *this += r; + } + + template <typename T, database_type_id ID> + explicit + query_base (ref_bind_typed<T, ID> r) + : binding_ (0, 0) + { + *this += r; + } + + template <database_type_id ID> + query_base (const query_column<bool, ID>&); + + // Translate common query representation to Oracle 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; + + 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, unsigned short prec = 0xFFF, short scale = 0xFFF) + { + return val_bind<T> (x, prec, scale); + } + + template <database_type_id ID, typename T> + static val_bind_typed<T, ID> + _val (const T& x, unsigned short prec = 0xFFF, short scale = 0xFFF) + { + return val_bind_typed<T, ID> (x, prec, scale); + } + + template <typename T> + static ref_bind<T> + _ref (const T& x, unsigned short prec = 0xFFF, short scale = 0xFFF) + { + return ref_bind<T> (x, prec, scale); + } + + template <database_type_id ID, typename T> + static ref_bind_typed<T, ID> + _ref (const T& x, unsigned short prec = 0xFFF, short scale = 0xFFF) + { + return ref_bind_typed<T, ID> (x, prec, scale); + } + + // 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], unsigned short prec = 0xFFF, short scale = 0xFFF) + { + return val_bind<T[N]> (x, prec, scale); + } + + template <database_type_id ID, typename T, std::size_t N> + static val_bind_typed<T[N], ID> + _val (const T (&x) [N], unsigned short prec = 0xFFF, short scale = 0xFFF) + { + return val_bind_typed<T[N], ID> (x, prec, scale); + } + + template <typename T, std::size_t N> + static ref_bind<T[N]> + _ref (const T (&x) [N], unsigned short prec = 0xFFF, short scale = 0xFFF) + { + return ref_bind<T[N]> (x, prec, scale); + } + + template <database_type_id ID, typename T, std::size_t N> + static ref_bind_typed<T[N], ID> + _ref (const T (&x) [N], unsigned short prec = 0xFFF, short scale = 0xFFF) + { + return ref_bind_typed<T[N], ID> (x, prec, scale); + } + + 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; + typedef std::vector<details::shared_ptr<query_param> > parameters_type; + + clause_type clause_; + parameters_type parameters_; + mutable std::vector<bind> bind_; + mutable binding binding_; + }; + + 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_ORACLE_EXPORT query_base + operator&& (const query_base& x, const query_base& y); + + LIBODB_ORACLE_EXPORT query_base + operator|| (const query_base& x, const query_base& y); + + LIBODB_ORACLE_EXPORT query_base + operator! (const query_base& x); + + // query_column + // + struct LIBODB_ORACLE_EXPORT 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, + unsigned short prec, + short scale) + : table_ (table), column_ (column), conversion_ (conv), + prec_ (prec), scale_ (scale) + { + } + + const char* + table () const + { + return table_; + } + + const char* + column () const + { + return column_; + } + + // Can be NULL. + // + const char* + conversion () const + { + return conversion_; + } + + unsigned short + prec () const + { + return prec_; + } + + short + scale () const + { + return scale_; + } + + protected: + const char* table_; + const char* column_; + const char* conversion_; + + unsigned short prec_; + short scale_; + }; + + 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 shalow copies of the table, column, and conversion + // expression. The latter can be NULL. + // + query_column (const char* table, + const char* column, + const char* conv, + unsigned short prec = 0xFFF, + short scale = 0xFFF) + : query_column_base (table, column, conv, prec, scale) {} + + // Implementation is in query-dynamic.ixx. + // + query_column (odb::query_column<T>&, + const char* table, + const char* column, + const char* conv, + unsigned short prec = 0xFFF, + short scale = 0xFFF); + + // 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 + { + v.prec = prec_; + v.scale = scale_; + + 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 + { + r.prec = prec_; + r.scale = scale_; + + 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 + { + v.prec = prec_; + v.scale = scale_; + + 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 + { + r.prec = prec_; + r.scale = scale_; + + 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 + { + v.prec = prec_; + v.scale = scale_; + + 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 + { + r.prec = prec_; + r.scale = scale_; + + 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 + { + v.prec = prec_; + v.scale = scale_; + + 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 + { + r.prec = prec_; + r.scale = scale_; + + 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 + { + v.prec = prec_; + v.scale = scale_; + + 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 + { + r.prec = prec_; + r.scale = scale_; + + 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 + { + v.prec = prec_; + v.scale = scale_; + + 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 + { + r.prec = prec_; + r.scale = scale_; + + 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; + } + }; + + // + // Oracle does not support comparison operations between LOB columns. + // query_column therefore only supports the IS NULL and IS NOT NULL + // predicates for these types. + // + + struct LIBODB_ORACLE_EXPORT lob_query_column: query_column_base + { + // Note that we keep shallow copies of the table and column names. + // There is also no need for conversion expression since the only + // valid tests are is IS NULL/IS NOT NULL. + // + lob_query_column (const char* table, const char* column) + : query_column_base (table, column, 0, 0xFFF, 0xFFF) + { + } + + // 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; + } + }; + + template <typename T> + struct query_column<T, id_blob>: lob_query_column + { + query_column (const char* table, const char* column, const char*) + : lob_query_column (table, column) + { + } + + // Implementation is in query-dynamic.ixx. + // + query_column (odb::query_column<T>&, + const char* table, const char* column, const char*); + }; + + template <typename T> + struct query_column<T, id_clob>: lob_query_column + { + query_column (const char* table, const char* column, const char*) + : lob_query_column (table, column) + { + } + + // Implementation is in query-dynamic.ixx. + // + query_column (odb::query_column<T>&, + const char* table, const char* column, const char*); + }; + + template <typename T> + struct query_column<T, id_nclob>: lob_query_column + { + query_column (const char* table, const char* column, const char*) + : lob_query_column (table, column) + { + } + + // Implementation is in query-dynamic.ixx. + // + query_column (odb::query_column<T>&, + const char* table, const char* column, const char*); + }; + + // 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; + + // id_int32. + // + template <typename T> + struct query_param_impl<T, id_int32>: 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 (bind_type* b) + { + b->type = image_traits<T, id_int32>::buffer_type; + b->buffer = &image_; + b->capacity = sizeof (image_); + b->size = 0; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + value_traits<T, id_int32>::set_image (image_, is_null, v); + } + + private: + typename image_traits<T, id_int32>::image_type image_; + }; + + // id_int64. + // + template <typename T> + struct query_param_impl<T, id_int64>: 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 (bind_type* b) + { + b->type = image_traits<T, id_int64>::buffer_type; + b->buffer = &image_; + b->capacity = sizeof (image_); + b->size = 0; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + value_traits<T, id_int64>::set_image (image_, is_null, v); + } + + private: + typename image_traits<T, id_int64>::image_type image_; + }; + + // id_big_int. + // + template <typename T> + struct query_param_impl<T, id_big_int>: 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 (bind_type* b) + { + b->type = bind_type::number; + b->buffer = &image_; + b->capacity = sizeof (image_); + b->size = &size_; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + std::size_t size (0); + value_traits<T, id_big_int>::set_image (image_, size, is_null, v); + size_ = static_cast<ub2> (size); + } + + private: + char image_[21]; + ub2 size_; + }; + + // id_float. + // + template <typename T> + struct query_param_impl<T, id_float>: 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 (bind_type* b) + { + b->type = bind_type::binary_float; + b->buffer = &image_; + b->capacity = sizeof (image_); + b->size = 0; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + value_traits<T, id_float>::set_image (image_, is_null, v); + } + + private: + float image_; + }; + + // id_double. + // + template <typename T> + struct query_param_impl<T, id_double>: 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 (bind_type* b) + { + b->type = bind_type::binary_double; + b->buffer = &image_; + b->capacity = sizeof (image_); + b->size = 0; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + value_traits<T, id_double>::set_image (image_, is_null, v); + } + + private: + double image_; + }; + + // id_big_float. + // + template <typename T> + struct query_param_impl<T, id_big_float>: 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 (bind_type* b) + { + b->type = bind_type::number; + b->buffer = &image_; + b->capacity = sizeof (image_); + b->size = &size_; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + std::size_t size (0); + value_traits<T, id_big_float>::set_image (image_, size, is_null, v); + size_ = static_cast<ub2> (size); + } + + private: + char image_[21]; + ub2 size_; + }; + + // id_date. + // + template <typename T> + struct query_param_impl<T, id_date>: 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 (bind_type* b) + { + b->type = bind_type::date; + b->buffer = &image_; + b->capacity = sizeof (image_); + b->size = 0; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + value_traits<T, id_date>::set_image (image_, is_null, v); + } + + private: + char image_[7]; + }; + + // id_timestamp + // + template <typename T> + struct query_param_impl<T, id_timestamp>: query_param + { + query_param_impl (ref_bind<T> r) + : query_param (r.ptr ()), + image_ (descriptor_cache) // Cache, don't free. + { + } + + query_param_impl (val_bind<T> v) + : query_param (0), + image_ (0) // Don't cache, don't free. + { + init (v.val); + } + + virtual bool + init () + { + init (*static_cast<const T*> (value_)); + return false; + } + + virtual void + bind (bind_type* b) + { + b->type = bind_type::timestamp; + b->buffer = &image_; + b->capacity = sizeof (OCIDateTime*); + b->size = 0; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + value_traits<T, id_timestamp>::set_image (image_, is_null, v); + } + + private: + datetime image_; + }; + + // id_interval_ym + // + template <typename T> + struct query_param_impl<T, id_interval_ym>: query_param + { + query_param_impl (ref_bind<T> r) + : query_param (r.ptr ()), + image_ (descriptor_cache) // Cache, don't free. + { + } + + query_param_impl (val_bind<T> v) + : query_param (0), + image_ (0) // Don't cache, don't free. + { + init (v.val); + } + + virtual bool + init () + { + init (*static_cast<const T*> (value_)); + return false; + } + + virtual void + bind (bind_type* b) + { + b->type = bind_type::interval_ym; + b->buffer = &image_; + b->capacity = sizeof (OCIInterval*); + b->size = 0; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + value_traits<T, id_interval_ym>::set_image (image_, is_null, v); + } + + private: + interval_ym image_; + }; + + // id_interval_ds + // + template <typename T> + struct query_param_impl<T, id_interval_ds>: query_param + { + query_param_impl (ref_bind<T> r) + : query_param (r.ptr ()), + image_ (descriptor_cache) // Cache, don't free. + { + } + + query_param_impl (val_bind<T> v) + : query_param (0), + image_ (0) // Don't cache, don't free. + + { + init (v.val); + } + + virtual bool + init () + { + init (*static_cast<const T*> (value_)); + return false; + } + + virtual void + bind (bind_type* b) + { + b->type = bind_type::interval_ds; + b->buffer = &image_; + b->capacity = sizeof (OCIInterval*); + b->size = 0; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + value_traits<T, id_interval_ds>::set_image (image_, is_null, v); + } + + private: + interval_ds image_; + }; + + // id_string. + // + template <typename T> + struct query_param_impl<T, id_string>: query_param + { + query_param_impl (ref_bind<T> r) + : query_param (r.ptr ()), + // Default to max (4000). + buf_ (r.prec != 0xFFF ? r.prec : 4000) + { + } + + query_param_impl (val_bind<T> v) + : query_param (0), + // Default to max (4000). + buf_ (v.prec != 0xFFF ? v.prec : 4000) + + { + init (v.val); + } + + virtual bool + init () + { + init (*static_cast<const T*> (value_)); + return false; + } + + virtual void + bind (bind_type* b) + { + b->type = bind_type::string; + b->buffer = buf_.data (); + b->capacity = static_cast<ub4> (buf_.capacity ()); + b->size = &size_; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + std::size_t size (0); + value_traits<T, id_string>::set_image ( + buf_.data (), buf_.capacity (), size, is_null, v); + size_ = static_cast<ub2> (size); + } + + private: + details::buffer buf_; + ub2 size_; + }; + + // id_nstring + // + template <typename T> + struct query_param_impl<T, id_nstring>: query_param + { + query_param_impl (ref_bind<T> r) + : query_param (r.ptr ()), + // Default to max (4000). + buf_ (r.prec != 0xFFF ? r.prec : 4000) + { + } + + query_param_impl (val_bind<T> v) + : query_param (0), + // Default to max (4000). + buf_ (v.prec != 0xFFF ? v.prec : 4000) + + { + init (v.val); + } + + virtual bool + init () + { + init (*static_cast<const T*> (value_)); + return false; + } + + virtual void + bind (bind_type* b) + { + b->type = bind_type::nstring; + b->buffer = buf_.data (); + b->capacity = static_cast<ub4> (buf_.capacity ()); + b->size = &size_; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + std::size_t size (0); + value_traits<T, id_nstring>::set_image ( + buf_.data (), buf_.capacity (), size, is_null, v); + size_ = static_cast<ub2> (size); + } + + private: + details::buffer buf_; + ub2 size_; + }; + + // id_raw + // + template <typename T> + struct query_param_impl<T, id_raw>: query_param + { + query_param_impl (ref_bind<T> r) + : query_param (r.ptr ()), + // Default to max (2000). + buf_ (r.prec != 0xFFF ? r.prec : 2000) + { + } + + query_param_impl (val_bind<T> v) + : query_param (0), + // Default to max (2000). + buf_ (v.prec != 0xFFF ? v.prec : 2000) + + { + init (v.val); + } + + virtual bool + init () + { + init (*static_cast<const T*> (value_)); + return false; + } + + virtual void + bind (bind_type* b) + { + b->type = bind_type::raw; + b->buffer = buf_.data (); + b->capacity = static_cast<ub4> (buf_.capacity ()); + b->size = &size_; + } + + private: + void + init (typename decay_traits<T>::type v) + { + bool is_null (false); // Can't be NULL. + std::size_t size (0); + value_traits<T, id_raw>::set_image ( + buf_.data (), buf_.capacity (), size, is_null, v); + size_ = static_cast<ub2> (size); + } + + private: + details::buffer buf_; + ub2 size_; + }; + } +} + +// odb::oracle::query and odb::query specialization for Oracle. +// +namespace odb +{ + namespace oracle + { + template <typename T> + class query: public query_base, + public query_selector<T, id_oracle>::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 oracle::query; + } + } + + // Derive odb::query from odb::oracle::query so that it can be + // implicitly converted in oracle::database::query() calls. + // + template <typename T> + class query<T, oracle::query_base>: public oracle::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) + : oracle::query<T> (v) + { + } + + explicit + query (const char* q) + : oracle::query<T> (q) + { + } + + explicit + query (const std::string& q) + : oracle::query<T> (q) + { + } + + template <typename T2> + explicit + query (oracle::val_bind<T2> v) + : oracle::query<T> (v) + { + } + + template <typename T2> + explicit + query (oracle::ref_bind<T2> r) + : oracle::query<T> (r) + { + } + + query (const oracle::query_base& q) + : oracle::query<T> (q) + { + } + + template <oracle::database_type_id ID> + query (const oracle::query_column<bool, ID>& qc) + : oracle::query<T> (qc) + { + } + }; +} + +#include <odb/oracle/query.ixx> +#include <odb/oracle/query.txx> + +#include <odb/post.hxx> + +#endif // ODB_ORACLE_QUERY_HXX |