[postgis-tickets] [SCM] PostGIS branch master updated. 3.1.0rc1-84-g4b0e00a

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- Log -----------------------------------------------------------------
commit 4b0e00a4e28013f9c3575532524fe2a6653f0658
Author: Daniel Baston <dbaston at gmail.com>
Date:   Wed Feb 17 20:34:04 2021 -0500

    Allow DBSCAN cluster to form when recordset length = minPoints
    
    Fixes #4853

diff --git a/liblwgeom/lwgeom_geos_cluster.c b/liblwgeom/lwgeom_geos_cluster.c
index 76c707f..2438663 100644
--- a/liblwgeom/lwgeom_geos_cluster.c
+++ b/liblwgeom/lwgeom_geos_cluster.c
@@ -401,7 +401,7 @@ union_dbscan_general(LWGEOM** geoms, uint32_t num_geoms, UNIONFIND* uf, double e
 		*in_a_cluster_ret = in_a_cluster;
 
 	/* Bail if we don't even have enough inputs to make a cluster. */
-	if (num_geoms <= min_points)
+	if (num_geoms < min_points)
 	{
 		if (!in_a_cluster_ret)
 			lwfree(in_a_cluster);
diff --git a/regress/core/tickets.sql b/regress/core/tickets.sql
index d4bf140..c73b72a 100644
--- a/regress/core/tickets.sql
+++ b/regress/core/tickets.sql
@@ -1318,3 +1318,6 @@ SELECT '#4727', _ST_DistanceTree('SRID=4326;POLYGON((-179.9 -85.05112877980659,
 SELECT '#4796', st_astext(st_snaptogrid(st_normalize(st_simplifypreservetopology('MULTISURFACE(((178632.044 397744.007,178631.118 397743.786,178646.399 397679.574,178693.864 397690.889,178698.958 397669.487,178700.206 397669.784,178758.532 397683.689,178748.351 397726.468,178752.199 397727.384,178748.782 397741.904,178744.897 397740.98,178738.157 397769.303,178632.044 397744.007)))'::geometry,1)),1));
 
 SELECT '#4812', st_srid('SRID=999999;POINT(1 1)'::geometry);
+
+SELECT '#4853', ST_ClusterDBSCAN(geom,  eps := 0.000906495804256269, minpoints := 4) OVER() AS cid FROM (VALUES ('0101000020E6100000E4141DC9E5934B40D235936FB6193940'::geometry), ('0101000020E6100000C746205ED7934B40191C25AFCE193940'::geometry), ('0101000020E6100000C780ECF5EE934B40B6BE4868CB193940'::geometry), ('0101000020E6100000ABB2EF8AE0934B404451A04FE4193940'::geometry)) AS t(geom);
+
diff --git a/regress/core/tickets_expected b/regress/core/tickets_expected
index 7f346c6..515b09f 100644
--- a/regress/core/tickets_expected
+++ b/regress/core/tickets_expected
@@ -439,3 +439,7 @@ ERROR:  LWGEOM_addpoint: Invalid offset
 #4727|0
 #4796|POLYGON((178632 397744,178738 397769,178745 397741,178749 397742,178752 397727,178748 397726,178759 397684,178699 397669,178694 397691,178646 397680,178632 397744))
 #4812|999999
+#4853|0
+#4853|0
+#4853|0
+#4853|0

-----------------------------------------------------------------------

Summary of changes:
 liblwgeom/lwgeom_geos_cluster.c | 2 +-
 regress/core/tickets.sql        | 3 +++
 regress/core/tickets_expected   | 4 ++++
 3 files changed, 8 insertions(+), 1 deletion(-)


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