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use 'limit 0' when gathering metadata, also we don't need getFieldSize at all

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This commit is contained in:
Artem Pavlenko 2007-09-07 15:50:40 +00:00
parent ef6f1060d3
commit 92b22558fd
1 changed files with 22 additions and 27 deletions
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11
plugins/input/postgis/postgis.cpp
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@ -99,26 +99,22 @@ postgis_datasource::postgis_datasource(parameters const& params)
// collect attribute desc // collect attribute desc
s.str(""); s.str("");
s << "select * from " << table_ << " limit 1"; s << "select * from " << table_ << " limit 0";
rs=conn->executeQuery(s.str()); rs=conn->executeQuery(s.str());
if (rs->next())
{
int count = rs->getNumFields(); int count = rs->getNumFields();
for (int i=0;i<count;++i) for (int i=0;i<count;++i)
{ {
std::string fld_name=rs->getFieldName(i); std::string fld_name=rs->getFieldName(i);
int length = rs->getFieldLength(i);
int type_oid = rs->getTypeOID(i); int type_oid = rs->getTypeOID(i);
switch (type_oid) switch (type_oid)
{ {
case 21: // int2 case 21: // int2
case 23: // int4 case 23: // int4
desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::Integer,false,length)); desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::Integer));
break; break;
case 700: // float4 case 700: // float4
case 701: // float8 case 701: // float8
desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::Double,false,length)); desc_.add_descriptor(attribute_descriptor(fld_name,mapnik::Double));
case 1042: // bpchar case 1042: // bpchar
case 1043: // varchar case 1043: // varchar
case 25: // text case 25: // text
@ -134,7 +130,6 @@ postgis_datasource::postgis_datasource(parameters const& params)
} }
} }
} }
}
std::string const postgis_datasource::name_="postgis"; std::string const postgis_datasource::name_="postgis";