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builtins: add ST_RelatePattern #51858

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Jul 24, 2020
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builtins: add ST_RelatePattern #51858

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2 changes: 2 additions & 0 deletions docs/generated/sql/functions.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1400,6 +1400,8 @@ Negative azimuth values and values greater than 2π (360 degrees) are supported.
<tr><td><a name="st_relate"></a><code>st_relate(geometry_a: geometry, geometry_b: geometry, pattern: <a href="string.html">string</a>) &rarr; <a href="bool.html">bool</a></code></td><td><span class="funcdesc"><p>Returns whether the DE-9IM spatial relation between geometry_a and geometry_b matches the DE-9IM pattern.</p>
<p>This function utilizes the GEOS module.</p>
</span></td></tr>
<tr><td><a name="st_relatematch"></a><code>st_relatematch(intersection_matrix: <a href="string.html">string</a>, pattern: <a href="string.html">string</a>) &rarr; <a href="bool.html">bool</a></code></td><td><span class="funcdesc"><p>Returns whether the given DE-9IM intersection matrix satisfies the given pattern.</p>
</span></td></tr>
<tr><td><a name="st_segmentize"></a><code>st_segmentize(geography: geography, max_segment_length_meters: <a href="float.html">float</a>) &rarr; geography</code></td><td><span class="funcdesc"><p>Returns a modified Geography having no segment longer than the given max_segment_length meters.</p>
<p>The calculations are done on a sphere.</p>
<p>This function utilizes the S2 library for spherical calculations.</p>
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11 changes: 11 additions & 0 deletions pkg/sql/logictest/testdata/logic_test/geospatial
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Expand Up @@ -1912,6 +1912,17 @@ SELECT ST_NPoints(ST_Buffer('SRID=4326;POINT(0 0)', 10.0))
33

# DE-9IM relations
query B
SELECT
ST_RelateMatch(m, pattern)
FROM ( VALUES
('101202FFF', 'TTTTTTFFF'),
('101202FTF', 'TTTTTTFFF')
) tbl(m, pattern)
----
true
false

query TTTB
SELECT
a.dsc,
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24 changes: 24 additions & 0 deletions pkg/sql/sem/builtins/geo_builtins.go
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Expand Up @@ -2421,6 +2421,30 @@ Note if geometries are the same, it will return the LineString with the minimum
Volatility: tree.VolatilityImmutable,
},
),
"st_relatematch": makeBuiltin(
defProps(),
tree.Overload{
Types: tree.ArgTypes{
{"intersection_matrix", types.String},
{"pattern", types.String},
},
Fn: func(ctx *tree.EvalContext, args tree.Datums) (tree.Datum, error) {
matrix := string(tree.MustBeDString(args[0]))
pattern := string(tree.MustBeDString(args[1]))

matches, err := geomfn.MatchesDE9IM(matrix, pattern)
if err != nil {
return nil, err
}
return tree.MakeDBool(tree.DBool(matches)), nil
},
ReturnType: tree.FixedReturnType(types.Bool),
Info: infoBuilder{
info: "Returns whether the given DE-9IM intersection matrix satisfies the given pattern.",
}.String(),
Volatility: tree.VolatilityImmutable,
},
),

//
// Validity checks
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