commit 819c1abba21c9b59cceedd55962c3fdcb982aad5
Author: Jacob Champion <jacob.champion@enterprisedb.com>
Date:   Thu Sep 26 14:12:38 2024 -0700

    RPR: test larger window partitions
    
    The second test case fails with
    
        ERROR:  wrong pos: 1024

diff --git a/src/test/regress/expected/rpr.out b/src/test/regress/expected/rpr.out
index 0789e09435..dcfd67f143 100644
--- a/src/test/regress/expected/rpr.out
+++ b/src/test/regress/expected/rpr.out
@@ -834,3 +834,40 @@ ERROR:  SEEK is not supported
 LINE 8:  SEEK
          ^
 HINT:  Use INITIAL.
+-- Smoke test for larger partitions.
+WITH s AS (
+ SELECT v, count(*) OVER w AS c
+ FROM (SELECT generate_series(1, 5000) v)
+ WINDOW w AS (
+  ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
+  AFTER MATCH SKIP PAST LAST ROW
+  INITIAL
+  PATTERN ( r+ )
+  DEFINE r AS TRUE
+ )
+)
+-- Should be exactly one long match across all rows.
+SELECT * FROM s WHERE c > 0;
+ v |  c   
+---+------
+ 1 | 5000
+(1 row)
+
+WITH s AS (
+ SELECT v, count(*) OVER w AS c
+ FROM (SELECT generate_series(1, 5000) v)
+ WINDOW w AS (
+  ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
+  AFTER MATCH SKIP PAST LAST ROW
+  INITIAL
+  PATTERN ( r )
+  DEFINE r AS TRUE
+ )
+)
+-- Every row should be its own match.
+SELECT count(*) FROM s WHERE c > 0;
+ count 
+-------
+  5000
+(1 row)
+
diff --git a/src/test/regress/sql/rpr.sql b/src/test/regress/sql/rpr.sql
index 302e2b86a5..6ff61e6d60 100644
--- a/src/test/regress/sql/rpr.sql
+++ b/src/test/regress/sql/rpr.sql
@@ -403,3 +403,32 @@ SELECT company, tdate, price, first_value(price) OVER w, last_value(price) OVER
   UP AS price > PREV(price),
   DOWN AS price < PREV(price)
 );
+
+-- Smoke test for larger partitions.
+WITH s AS (
+ SELECT v, count(*) OVER w AS c
+ FROM (SELECT generate_series(1, 5000) v)
+ WINDOW w AS (
+  ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
+  AFTER MATCH SKIP PAST LAST ROW
+  INITIAL
+  PATTERN ( r+ )
+  DEFINE r AS TRUE
+ )
+)
+-- Should be exactly one long match across all rows.
+SELECT * FROM s WHERE c > 0;
+
+WITH s AS (
+ SELECT v, count(*) OVER w AS c
+ FROM (SELECT generate_series(1, 5000) v)
+ WINDOW w AS (
+  ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING
+  AFTER MATCH SKIP PAST LAST ROW
+  INITIAL
+  PATTERN ( r )
+  DEFINE r AS TRUE
+ )
+)
+-- Every row should be its own match.
+SELECT count(*) FROM s WHERE c > 0;