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Patch level : 12.0 nopatch

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Files correlati     :

Commento        :
sistemata add_between_filter. Aggiunte add_between_num_filter add_between_date_filter
This commit is contained in:
Alessandro Bonazzi 2021-05-22 21:50:20 +02:00
parent 7a4f105218
commit 30e1e22190
2 changed files with 64 additions and 31 deletions
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86
src/include/recset.cpp
View File

@ -1713,34 +1713,70 @@ const TString& TISAM_recordset::driver_version() const
return tmp; return tmp;
} }
TString& TISAM_recordset::add_between_filter(const TString& field, const TString& from_val, const TString& to_val, TString& TISAM_recordset::add_between_filter(TString & clause, const TString& field, const char* from_val, const char * to_val)
TString from_fld, TString to_fld)
{ {
// Se from_fld e to_fld sono vuoti vengono valorizzati con il nome del campo preceduti da #DA e #A
if (from_fld.empty() || to_fld.empty())
{
const TString qf = field.find('.') < 0 ? field : field.sub(field.find('.') + 1);
if (from_fld.empty())
from_fld << "#DA" << qf;
if (to_fld.empty())
to_fld << "#A" << qf;
}
TString& ret = get_tmp_string(); TString& ret = get_tmp_string();
if (from_val.full() && to_val.full())
{
ret << "&&(BETWEEN(" << field << ", " << from_fld << ", " << to_fld << "))";
}
else if (from_val.full())
{
ret << "&&(" << field << ">=" << from_fld << ")";
}
else if (to_val.full())
{
ret << "&&(" << field << "<=" << to_fld << ")";
}
return ret; if (from_val && *from_val && to_val && *to_val)
ret << "(BETWEEN(" << field << ", \"" << from_val << "\", \"" << to_val << "\"))";
else
if (from_val && *from_val)
ret << "(" << field << ">=\"" << from_val << "\")";
else
if (to_val && *to_val)
ret << "(\"" << field << "<=" << to_val << "\")";
if (ret.full())
{
if (clause.full())
clause << "&&";
clause << ret;
}
return ret;
}
TString& TISAM_recordset::add_between_num_filter(TString & clause, const TString& field, const char* from_val, const char * to_val)
{
TString& ret = get_tmp_string();
if (from_val && *from_val && to_val && *to_val)
ret << "(BETWEEN(" << field << ", " << from_val << ", " << to_val << "))";
else
if (from_val && *from_val)
ret << "(" << field << ">=" << from_val << ")";
else
if (to_val && *to_val)
ret << "(" << field << "<=" << to_val << ")";
if (ret.full())
{
if (clause.full())
clause << "&&";
clause << ret;
}
return ret;
}
TString& TISAM_recordset::add_between_date_filter(TString & clause, const TString& field, const TDate & from_val, const TDate & to_val)
{
TString& ret = get_tmp_string();
if (from_val && *from_val && to_val && *to_val)
ret << "(BETWEEN(" << field << ", " << from_val.date2ansi() << ", " << to_val.date2ansi() << "))";
else
if (from_val && *from_val)
ret << "(ANSI(" << field << ")>=" << from_val.date2ansi() << ")";
else
if (to_val && *to_val)
ret << "(ANSI(" << field << ")<=" << to_val.date2ansi() << ")";
if (ret.full())
{
if (clause.full())
clause << "&&";
clause << ret;
}
return ret;
} }
TISAM_recordset::TISAM_recordset(const char* use) TISAM_recordset::TISAM_recordset(const char* use)

9
src/include/recset.h
View File

@ -187,12 +187,9 @@ public:
virtual const TString& driver_version() const; virtual const TString& driver_version() const;
virtual const TString& query_text() const { return _use; } virtual const TString& query_text() const { return _use; }
// Utility static TString& add_between_filter(TString & clause, const TString& field, const char * from_val, const char * to_val);
/* Ritorna un filtro che può essere: static TString& add_between_num_filter(TString & clause, const TString& field, const char * from_val, const char * to_val);
* from_val && to_val: field between static TString& add_between_date_filter(TString & clause, const TString& field, const TDate & from_val, const TDate & to_val);
* solo from_from: field >= from_val
* solo to_from: field <= to_val */
static TString& add_between_filter(const TString& field, const TString& from_val, const TString& to_val, TString from_fld = "", TString to_fld = "");
TISAM_recordset(const char* use); TISAM_recordset(const char* use);
TISAM_recordset(TCursor & c); TISAM_recordset(TCursor & c);