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// file : odb/oracle/query-dynamic.cxx
// license : ODB NCUEL; see accompanying LICENSE file
#include <cstddef> // std::size_t
#include <odb/oracle/query-dynamic.hxx>
#include <odb/oracle/exceptions.hxx> // lob_comparison
using namespace std;
namespace odb
{
namespace oracle
{
static const char* logic_operators[] = {") AND (", ") OR ("};
static const char* comp_operators[] = {"=", "!=", "<", ">", "<=", ">="};
static void
translate (query_base& q, const odb::query_base& s, size_t p)
{
typedef odb::query_base::clause_part part;
const part& x (s.clause ()[p]);
switch (x.kind)
{
case part::kind_column:
{
const query_column_base* c (
static_cast<const query_column_base*> (
x.native_info[id_oracle].column));
q.append (c->table (), c->column ());
break;
}
case part::kind_param_val:
case part::kind_param_ref:
{
const query_column_base& qc (
*static_cast<const query_column_base*> (
x.native_info[id_oracle].column));
query_param_factory f (
reinterpret_cast<query_param_factory> (
x.native_info[id_oracle].param_factory));
// If factory is NULL, then this is a LOB value.
//
if (f == 0)
throw lob_comparison ();
const odb::query_param* p (
reinterpret_cast<const odb::query_param*> (x.data));
q.append (f (p->value, qc, x.kind == part::kind_param_ref),
qc.conversion ());
break;
}
case part::kind_native:
{
q.append (s.strings ()[x.data]);
break;
}
case part::kind_true:
case part::kind_false:
{
q.append (x.kind == part::kind_true);
break;
}
case part::op_add:
{
translate (q, s, x.data);
translate (q, s, p - 1);
break;
}
case part::op_and:
case part::op_or:
{
q += "(";
translate (q, s, x.data);
q += logic_operators[x.kind - part::op_and];
translate (q, s, p - 1);
q += ")";
break;
}
case part::op_not:
{
q += "NOT (";
translate (q, s, p - 1);
q += ")";
break;
}
case part::op_null:
case part::op_not_null:
{
translate (q, s, p - 1);
q += (x.kind == part::op_null ? "IS NULL" : "IS NOT NULL");
break;
}
case part::op_in:
{
if (x.data != 0)
{
size_t b (p- x.data);
translate (q, s, b - 1); // column
q += "IN (";
for (size_t i (b); i != p; ++i)
{
if (i != b)
q += ",";
translate (q, s, i);
}
q += ")";
}
else
q.append (false);
break;
}
case part::op_like:
{
translate (q, s, p - 2); // column
q += "LIKE";
translate (q, s, p - 1); // pattern
break;
}
case part::op_like_escape:
{
translate (q, s, p - 3); // column
q += "LIKE";
translate (q, s, p - 2); // pattern
q += "ESCAPE";
translate (q, s, p - 1); // escape
break;
}
case part::op_eq:
case part::op_ne:
case part::op_lt:
case part::op_gt:
case part::op_le:
case part::op_ge:
{
translate (q, s, x.data);
q += comp_operators[x.kind - part::op_eq];
translate (q, s, p - 1);
break;
}
}
}
query_base::
query_base (const odb::query_base& q)
: binding_ (0, 0)
{
if (!q.empty ())
translate (*this, q, q.clause ().size () - 1);
}
}
}
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