static inline std::string numeric2string(const char* buf) { std::int16_t ndigits = int2net(buf); std::int16_t weight = int2net(buf+2); std::int16_t sign = int2net(buf+4); std::int16_t dscale = int2net(buf+6); std::unique_ptr<std::int16_t[]> digits(new std::int16_t[ndigits]); for (int n=0; n < ndigits ;++n) { digits[n] = int2net(buf+8+n*2); } std::ostringstream ss; if (sign == 0x4000) ss << "-"; int i = std::max(weight,std::int16_t(0)); int d = 0; // Each numeric "digit" is actually a value between 0000 and 9999 stored in a 16 bit field. // For example, the number 1234567809990001 is stored as four digits: [1234] [5678] [999] [1]. // Note that the last two digits show that the leading 0's are lost when the number is split. // We must be careful to re-insert these 0's when building the string. while ( i >= 0) { if (i <= weight && d < ndigits) { // All digits after the first must be padded to make the field 4 characters long if (d != 0) { #ifdef _WINDOWS int dig = digits[d]; if (dig < 10) { ss << "000"; // 0000 - 0009 } else if (dig < 100) { ss << "00"; // 0010 - 0099 } else { ss << "0"; // 0100 - 0999; } #else switch(digits[d]) { case 0 ... 9: ss << "000"; // 0000 - 0009 break; case 10 ... 99: ss << "00"; // 0010 - 0099 break; case 100 ... 999: ss << "0"; // 0100 - 0999 break; } #endif } ss << digits[d++]; } else { if (d == 0)
void pgsql2sqlite(Connection conn, std::string const& query, std::string const& output_table_name, std::string const& output_filename) { namespace sqlite = mapnik::sqlite; sqlite::database db(output_filename); boost::shared_ptr<ResultSet> rs = conn->executeQuery("select * from (" + query + ") as query limit 0;"); int count = rs->getNumFields(); std::ostringstream select_sql; select_sql << "select "; for (int i=0; i<count; ++i) { if (i!=0) select_sql << ","; select_sql << "\"" << rs->getFieldName(i) << "\""; } select_sql << " from (" << query << ") as query"; std::string table_name = mapnik::sql_utils::table_from_sql(query); std::string schema_name=""; std::string::size_type idx=table_name.find_last_of('.'); if (idx!=std::string::npos) { schema_name=table_name.substr(0,idx); table_name=table_name.substr(idx+1); } else { table_name=table_name.substr(0); } std::ostringstream geom_col_sql; geom_col_sql << "select f_geometry_column,srid,type from geometry_columns "; geom_col_sql << "where f_table_name='" << table_name << "'"; if (schema_name.length() > 0) { geom_col_sql <<" and f_table_schema='"<< schema_name <<"'"; } rs = conn->executeQuery(geom_col_sql.str()); int srid = -1; std::string geom_col = "UNKNOWN"; std::string geom_type = "UNKNOWN"; if ( rs->next()) { try { srid = boost::lexical_cast<int>(rs->getValue("srid")); } catch (boost::bad_lexical_cast &ex) { std::clog << ex.what() << std::endl; } geom_col = rs->getValue("f_geometry_column"); geom_type = rs->getValue("type"); } // add AsBinary(<geometry_column>) modifier std::string select_sql_str = select_sql.str(); boost::algorithm::replace_all(select_sql_str, "\"" + geom_col + "\"","AsBinary(" + geom_col+") as " + geom_col); #ifdef MAPNIK_DEBUG std::cout << select_sql_str << "\n"; #endif std::ostringstream cursor_sql; std::string cursor_name("my_cursor"); cursor_sql << "DECLARE " << cursor_name << " BINARY INSENSITIVE NO SCROLL CURSOR WITH HOLD FOR " << select_sql_str << " FOR READ ONLY"; conn->execute(cursor_sql.str()); boost::shared_ptr<CursorResultSet> cursor(new CursorResultSet(conn,cursor_name,10000)); unsigned num_fields = cursor->getNumFields(); if (num_fields == 0) return; std::string feature_id = "fid"; std::ostringstream create_sql; create_sql << "create table if not exists " << output_table_name << " (" << feature_id << " INTEGER PRIMARY KEY AUTOINCREMENT,"; int geometry_oid = -1; std::string output_table_insert_sql = "insert into " + output_table_name + " values (?"; context_ptr ctx = boost::make_shared<context_type>(); for ( unsigned pos = 0; pos < num_fields ; ++pos) { const char* field_name = cursor->getFieldName(pos); ctx->push(field_name); if (pos > 0) { create_sql << ","; } output_table_insert_sql +=",?"; int oid = cursor->getTypeOID(pos); if (geom_col == cursor->getFieldName(pos)) { geometry_oid = oid; create_sql << "'" << cursor->getFieldName(pos) << "' BLOB"; } else { create_sql << "'" << cursor->getFieldName(pos); switch (oid) { case 20: case 21: case 23: create_sql << "' INTEGER"; break; case 700: case 701: create_sql << "' REAL"; break; default: create_sql << "' TEXT"; break; } } } create_sql << ");"; output_table_insert_sql +=")"; std::cout << "client_encoding=" << conn->client_encoding() << "\n"; std::cout << "geometry_column=" << geom_col << "(" << geom_type << ") srid=" << srid << " oid=" << geometry_oid << "\n"; db.execute("begin;"); // output table sql db.execute(create_sql.str()); // spatial index sql std::string spatial_index_sql = "create virtual table idx_" + output_table_name + "_" + geom_col + " using rtree(pkid, xmin, xmax, ymin, ymax)"; db.execute(spatial_index_sql); //blob_to_hex hex; int pkid = 0; std::string spatial_index_insert_sql = "insert into idx_" + output_table_name + "_" + geom_col + " values (?,?,?,?,?)" ; sqlite::prepared_statement spatial_index(db,spatial_index_insert_sql); #ifdef MAPNIK_DEBUG std::cout << output_table_insert_sql << "\n"; #endif sqlite::prepared_statement output_table(db,output_table_insert_sql); while (cursor->next()) { ++pkid; sqlite::record_type output_rec; output_rec.push_back(sqlite::value_type(pkid)); bool empty_geom = true; const char * buf = 0; for (unsigned pos=0 ; pos < num_fields; ++pos) { if (! cursor->isNull(pos)) { int size=cursor->getFieldLength(pos); int oid = cursor->getTypeOID(pos); buf=cursor->getValue(pos); switch (oid) { case 25: case 1042: case 1043: { std::string text(buf); boost::algorithm::replace_all(text,"'","''"); output_rec.push_back(sqlite::value_type(text)); break; } case 23: output_rec.push_back(sqlite::value_type(int4net(buf))); break; case 21: output_rec.push_back(sqlite::value_type(int2net(buf))); break; case 700: { float val; float4net(val,buf); output_rec.push_back(sqlite::value_type(val)); break; } case 701: { double val; float8net(val,buf); output_rec.push_back(sqlite::value_type(val)); break; } case 1700: { std::string str = mapnik::sql_utils::numeric2string(buf); try { double val = boost::lexical_cast<double>(str); output_rec.push_back(sqlite::value_type(val)); } catch (boost::bad_lexical_cast & ex) { std::clog << ex.what() << "\n"; } break; } default: { if (oid == geometry_oid) { mapnik::Feature feat(ctx,pkid); geometry_utils::from_wkb(feat.paths(),buf,size,wkbGeneric); if (feat.num_geometries() > 0) { geometry_type const& geom=feat.get_geometry(0); box2d<double> bbox = geom.envelope(); if (bbox.valid()) { sqlite::record_type rec; rec.push_back(sqlite::value_type(pkid)); rec.push_back(sqlite::value_type(bbox.minx())); rec.push_back(sqlite::value_type(bbox.maxx())); rec.push_back(sqlite::value_type(bbox.miny())); rec.push_back(sqlite::value_type(bbox.maxy())); spatial_index.insert_record(rec); empty_geom = false; } } output_rec.push_back(sqlite::blob(buf,size)); } else { output_rec.push_back(sqlite::null_type()); } break; } } } else { output_rec.push_back(sqlite::null_type()); } } if (!empty_geom) output_table.insert_record(output_rec); if (pkid % 1000 == 0) { std::cout << "\r processing " << pkid << " features"; std::cout.flush(); } if (pkid % 100000 == 0) { db.execute("commit;begin;"); } } // commit db.execute("commit;"); std::cout << "\r processed " << pkid << " features"; db.execute("VACUUM;"); std::cout << "\r vacumming"; std::cout << "\n Done!" << std::endl; }