Added ST_GEOXXX_TO_LONG, _TO_STRING and _TO_GEOSHAPE functions

This is because we want to move the ST_GEOXXX functions to produce longs only, for performance reasons, and need the convenience functions to display these either as strings or as actual shapes.

This is both useful to the users, as well as easier to do manual tests where we visualize the results on a map.

Author: craigtaverner

x-pack/plugin/esql/qa/testFixtures/src/main/resources/spatial-grid.csv-spec

@@ -2,6 +2,50 @@
 # Tests for geo_grid function: ST_GEOHASH
 ###############################################
 
+geohashStringToLong
+required_capability: spatial_grid
+
+ROW geohash = "u3bu"
+| EVAL geohashLong = ST_GEOHASH_TO_LONG(geohash)
+;
+
+geohash:keyword | geohashLong:long
+u3bu            | 13686180
+;
+
+geohashLongToString
+required_capability: spatial_grid
+
+ROW geohash = TO_LONG(13686180)
+| EVAL geohashString = ST_GEOHASH_TO_STRING(geohash)
+;
+
+geohash:long | geohashString:keyword
+13686180     | u3bu
+;
+
+geohashStringToGeoShape
+required_capability: spatial_grid
+
+ROW geohash = "u3bu"
+| EVAL boundary = ST_GEOHASH_TO_GEOSHAPE(geohash)
+;
+
+geohash:keyword | boundary:geo_shape
+u3bu            | BBOX (12.3046875, 12.65625, 55.72265625, 55.546875)
+;
+
+geohashLongToGeoShape
+required_capability: spatial_grid
+
+ROW geohash = TO_LONG(13686180)
+| EVAL boundary = ST_GEOHASH_TO_GEOSHAPE(geohash)
+;
+
+geohash:long | boundary:geo_shape
+13686180     | BBOX (12.3046875, 12.65625, 55.72265625, 55.546875)
+;
+
 geohashLiteral
 required_capability: spatial_grid
 
@@ -190,6 +234,19 @@ count:long | centroid:geo_point
 # Tests for geo_grid function: ST_GEOTILE
 ###############################################
 
+geotileStringToLong
+required_capability: spatial_grid
+
+ROW geotile = "4/8/5"
+| EVAL geotileLong = ST_GEOTILE_TO_LONG(geotile)
+| EVAL geotileString = ST_GEOTILE_TO_STRING(geotileLong)
+| EVAL boundary = ST_GEOTILE_TO_GEOSHAPE(geotile)
+;
+
+geotile:keyword | geotileLong:long    | geotileString:keyword | boundary:geo_shape
+4/8/5           | 1152921508901814277 | 4/8/5                 | BBOX (0.0, 22.5, 55.77657301866769, 40.979898069620134)
+;
+
 geotileLiteral
 required_capability: spatial_grid
 
@@ -361,6 +418,19 @@ count:long | centroid:geo_point
 # Tests for geo_grid function: ST_GEOHEX
 ###############################################
 
+geohexStringToLong
+required_capability: spatial_grid
+
+ROW geohex = "841f059ffffffff"
+| EVAL geohexLong = ST_GEOHEX_TO_LONG(geohex)
+| EVAL geohexString = ST_GEOHEX_TO_STRING(geohexLong)
+| EVAL boundary = ST_GEOHEX_TO_GEOSHAPE(geohex)
+;
+
+geohex:keyword  | geohexLong:long    | geohexString:keyword | boundary:geo_shape
+841f059ffffffff | 595020895127339007 | 841f059ffffffff      | POLYGON ((12.353546327258265 55.80335405461356, 12.2434612967008 55.60502874054935, 12.51733872608954 55.470800201545316, 12.901880149865134 55.53443156197633, 13.014270156228921 55.73262985778208, 12.739822958959069 55.8673267391136, 12.353546327258265 55.80335405461356))
+;
+
 geohexLiteral
 required_capability: spatial_grid