diff -U3 /tmp/cirrus-ci-build/contrib/btree_gist/expected/without_overlaps.out /tmp/cirrus-ci-build/contrib/btree_gist/results/without_overlaps.out
--- /tmp/cirrus-ci-build/contrib/btree_gist/expected/without_overlaps.out	2024-05-02 14:50:47.072341588 +0000
+++ /tmp/cirrus-ci-build/contrib/btree_gist/results/without_overlaps.out	2024-05-02 14:54:15.696169329 +0000
@@ -16,6 +16,8 @@
  valid_at | daterange |           | not null | 
 Indexes:
     "temporal_rng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
+Check constraints:
+    "valid_at_not_empty" CHECK (NOT isempty(valid_at))
 
 SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_rng_pk';
             pg_get_constraintdef             
@@ -60,6 +62,8 @@
  parent_id | integer   |           |          | 
 Indexes:
     "temporal_fk_rng2rng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
+Check constraints:
+    "valid_at_not_empty" CHECK (NOT isempty(valid_at))
 Foreign-key constraints:
     "temporal_fk_rng2rng_fk" FOREIGN KEY (parent_id, PERIOD valid_at) REFERENCES temporal_rng(id, PERIOD valid_at)