apply modified patch from Mak Kolybabi fixing up postgres schema support in PostGIS plugin - closes #500 - extends #260
This commit is contained in:
Dane Springmeyer
parent
e03c997024
commit
badbc8706f
4 changed files with 35 additions and 16 deletions
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AUTHORS
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AUTHORS
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@ -31,6 +31,7 @@ Patches
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- Beau Gunderson
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- John Hague
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- Aubrey Holland
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- Mak Kolybabi
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- Dennis Luxen
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- Tom MacWright
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- Michal Migurski
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@ -16,6 +16,8 @@ Mapnik Trunk
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- Fixed reading of PostGIS data on Big Endian systems (#515)
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- PostGIS: Added better support for alterative schemas (#500)
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- AGG Renderer - Enforced default gamma function on all symbolizers to ensure proper antialiasing
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even when gamma is modified on the PolygonSymbolizer. (#512)
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@ -72,6 +72,7 @@ using mapnik::attribute_descriptor;
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postgis_datasource::postgis_datasource(parameters const& params)
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: datasource(params),
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table_(*params_.get<std::string>("table","")),
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schema_(""),
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geometry_table_(*params_.get<std::string>("geometry_table","")),
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geometry_field_(*params_.get<std::string>("geometry_field","")),
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cursor_fetch_size_(*params_.get<int>("cursor_size",0)),
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@ -152,11 +153,10 @@ postgis_datasource::postgis_datasource(parameters const& params)
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{
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geometry_table_ = table_from_sql(table_);
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}
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std::string schema_name="";
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std::string::size_type idx = geometry_table_.find_last_of('.');
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if (idx!=std::string::npos)
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{
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schema_name = geometry_table_.substr(0,idx);
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schema_ = geometry_table_.substr(0,idx);
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geometry_table_ = geometry_table_.substr(idx+1);
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}
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else
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@ -177,8 +177,8 @@ postgis_datasource::postgis_datasource(parameters const& params)
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s << "SELECT f_geometry_column, srid FROM ";
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s << GEOMETRY_COLUMNS <<" WHERE f_table_name='" << unquote(geometry_table_) <<"'";
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if (schema_name.length() > 0)
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s << " AND f_table_schema='" << unquote(schema_name) << "'";
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if (schema_.length() > 0)
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s << " AND f_table_schema='" << unquote(schema_) << "'";
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if (geometry_field_.length() > 0)
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s << " AND f_geometry_column='" << unquote(geometry_field_) << "'";
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@ -468,9 +468,9 @@ featureset_ptr postgis_datasource::features(const query& q) const
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if (!geometryColumn_.length() > 0)
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{
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std::ostringstream s_error;
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s_error << "PostGIS: geometry name lookup failed for table '" << geometry_table_
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s_error << "PostGIS: geometry name lookup failed for table '" << schema_ << "." << geometry_table_
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<< "'. Please manually provide the 'geometry_field' parameter or add an entry "
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<< "in the geometry_columns for '" << geometry_table_ << "'.";
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<< "in the geometry_columns for '" << schema_ << "." << geometry_table_ << "'.";
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throw mapnik::datasource_exception(s_error.str());
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}
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@ -515,9 +515,9 @@ featureset_ptr postgis_datasource::features_at_point(coord2d const& pt) const
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if (!geometryColumn_.length() > 0)
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{
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std::ostringstream s_error;
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s_error << "PostGIS: geometry name lookup failed for table '" << geometry_table_
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s_error << "PostGIS: geometry name lookup failed for table '" << schema_ << "." << geometry_table_
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<< "'. Please manually provide the 'geometry_field' parameter or add an entry "
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<< "in the geometry_columns for '" << geometry_table_ << "'.";
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<< "in the geometry_columns for '" << schema_ << "." << geometry_table_ << "'.";
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throw mapnik::datasource_exception(s_error.str());
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}
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@ -568,33 +568,48 @@ box2d<double> postgis_datasource::envelope() const
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{
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std::ostringstream s_error;
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s_error << "PostGIS: unable to query the layer extent of table '"
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<< geometry_table_ << "' because we cannot determine the geometry field name."
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<< schema_ << "." << geometry_table_ << "' because we cannot determine the geometry field name."
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<< "\nPlease provide either 1) an 'extent' parameter to skip this query, "
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<< "2) a 'geometry_field' and/or 'geometry_table' parameter, or 3) add a "
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<< "record to the 'geometry_columns' for your table.";
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throw mapnik::datasource_exception(s_error.str());
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}
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// TODO - do we need to respect schema here?
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if (estimate_extent && *estimate_extent == "true")
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{
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s << "select xmin(ext),ymin(ext),xmax(ext),ymax(ext)"
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<< " from (select estimated_extent('"
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<< geometry_table_ << "','"
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<< geometryColumn_ << "') as ext) as tmp";
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<< " from (select estimated_extent(";
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if (schema_.length() > 0)
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{
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s << schema_ << ".";
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}
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s << geometry_table_ << ","
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<< geometryColumn_ << ") as ext) as tmp";
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}
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else
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{
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s << "select xmin(ext),ymin(ext),xmax(ext),ymax(ext)"
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<< " from (select extent(" <<geometryColumn_<< ") as ext from ";
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if (extent_from_subquery_)
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{
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// if a subselect limits records then calculating the extent upon the
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// subquery will be faster and the bounds will be more accurate
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s << populate_tokens(table_) << ") as tmp";
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}
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else
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{
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if (schema_.length() > 0)
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{
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s << schema_ << ".";
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}
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// but if the subquery does not limit records then querying the
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// actual table will be faster as indexes can be used
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s << geometry_table_ << ") as tmp";
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}
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}
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/*if (show_queries_)
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{
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@ -57,6 +57,7 @@ class postgis_datasource : public datasource
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const std::string username_;
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const std::string password_;
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const std::string table_;
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mutable std::string schema_;
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mutable std::string geometry_table_;
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const std::string geometry_field_;
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const int cursor_fetch_size_;
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