feature method
Looks up a feature entry by name.
@param name THe name of the feature entry.
@return The entry, or null
if no such entry exists.
Implementation
FeatureEntry? feature(TableName name) {
if (!_sqliteDb
.hasTable(TableName(TABLE_GEOMETRY_COLUMNS, schemaSupported: false))) {
return null;
}
String compat =
forceVectorMobileCompatibility ? "and c.srs_id = $WGS84LL_SRID" : "";
String sql = """
SELECT a.*, b.column_name, b.geometry_type_name, b.m, b.z, c.organization_coordsys_id, c.definition
FROM $TABLE_GEOPACKAGE_CONTENTS a, $TABLE_GEOMETRY_COLUMNS b, $TABLE_SPATIAL_REF_SYS c WHERE a.table_name = b.table_name
AND a.srs_id = c.srs_id $compat AND lower(a.table_name) = lower(?)
AND a.data_type = ?
""";
var res = _sqliteDb.select(sql, [name.name, DataType.Feature.value]);
if (res.length != 0) {
return createFeatureEntry(res.first);
}
return null;
}