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fix: handle tables with no properties

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This commit is contained in:
Stepan Kuzmin 2018-06-04 17:46:48 +03:00
parent 241dda3184
commit d6aee81b1b
2 changed files with 11 additions and 13 deletions
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9
src/scripts/get_tile.sql
View File

@ -1,14 +1,7 @@
WITH bounds AS (SELECT {mercator_bounds} as mercator, {original_bounds} as original) WITH bounds AS (SELECT {mercator_bounds} as mercator, {original_bounds} as original)
SELECT ST_AsMVT(tile, '{id}', {extent}, 'geom') FROM ( SELECT ST_AsMVT(tile, '{id}', {extent}, 'geom') FROM (
SELECT SELECT
ST_AsMVTGeom( ST_AsMVTGeom({geometry_column_mercator}, bounds.mercator, {extent}, {buffer}, {clip_geom}) AS geom {properties}
{geometry_column_mercator},
bounds.mercator,
{extent},
{buffer},
{clip_geom}
) AS geom,
{properties}
FROM {id}, bounds FROM {id}, bounds
WHERE {geometry_column} && bounds.original {condition} WHERE {geometry_column} && bounds.original {condition}
) AS tile WHERE geom IS NOT NULL ) AS tile WHERE geom IS NOT NULL

11
src/source.rs
View File

@ -41,12 +41,17 @@ impl Source {
) )
}; };
let columns: Vec<String> = self.properties let properties = if self.properties.is_empty() {
"".to_string()
} else {
let properties = self.properties
.keys() .keys()
.map(|column| format!("\"{0}\"", column)) .map(|column| format!("\"{0}\"", column))
.collect(); .collect::<Vec<String>>()
.join(",");
let properties = columns.join(","); format!(", {0}", properties)
};
let query = format!( let query = format!(
include_str!("scripts/get_tile.sql"), include_str!("scripts/get_tile.sql"),