On 27.06.2024 23:06, Alena Rybakina wrote:
Tobe honest,I've alreadystartedwritingcodetodothis,butI'm facedwitha misunderstandingof howto correctlycreatea conditionfor"OR"expressionsthatare notsubjectto transformation.

For example,the expressions b=1in the query below:

alena@postgres=# explain select * from x where ( (a =5 or a=4) and a = ANY(ARRAY[5,4])) or (b=1); QUERY PLAN ---------------------------------------------------------------------------------- Seq Scan on x (cost=0.00..123.00 rows=1 width=8) Filter: ((((a = 5) OR (a = 4)) AND (a = ANY ('{5,4}'::integer[]))) OR (b = 1)) (2 rows)

I see that two expressions have remained unchanged and it only works for "AND" binary operations.

But I think it might be worth applying this together, where does the optimizer generate indexes (build_paths_for_OR function)?

Iimplementedsuchcode,butatthe analysisstageinplanner,anditwasn'tfullyreadyyet,butIwas ableto drawsomeimportantconclusions.Firstof all,Ifacedtheproblemof the inequalityof the numberof columnsinthe expressionwiththe requiredone,atleastsomeextracolumnappeared,judgingby the crust.Ihaven'tfullyrealizedityet andhaven'tfixedit.

#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=134300960061248)
    at ./nptl/pthread_kill.c:44
#1  __pthread_kill_internal (signo=6, threadid=134300960061248) at ./nptl/pthread_kill.c:78 #2  __GI___pthread_kill (threadid=134300960061248, signo=signo@entry=6) at ./nptl/pthread_kill.c:89 #3  0x00007a2560042476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#4  0x00007a25600287f3 in __GI_abort () at ./stdlib/abort.c:79
#5  0x00005573f9df62a8 in ExceptionalCondition (
    conditionName=0x5573f9fec4c8 "AttrNumberIsForUserDefinedAttr(list_attnums[i]) || !bms_is_member(attnum, clauses_attnums)", fileName=0x5573f9fec11c "dependencies.c", lineNumber=1525) at assert.c:66 #6  0x00005573f9b8b85f in dependencies_clauselist_selectivity (root=0x5573fad534e8,     clauses=0x5573fad0b2d8, varRelid=0, jointype=JOIN_INNER, sjinfo=0x0, rel=0x5573fad54b38,
    estimatedclauses=0x7ffe2e43f178) at dependencies.c:1525
#7  0x00005573f9b8fed9 in statext_clauselist_selectivity (root=0x5573fad534e8, clauses=0x5573fad0b2d8,     varRelid=0, jointype=JOIN_INNER, sjinfo=0x0, rel=0x5573fad54b38, estimatedclauses=0x7ffe2e43f178,
    is_or=false) at extended_stats.c:2035
--Type <RET> for more, q to quit, c to continue without paging--
#8  0x00005573f9a57f88 in clauselist_selectivity_ext (root=0x5573fad534e8, clauses=0x5573fad0b2d8,     varRelid=0, jointype=JOIN_INNER, sjinfo=0x0, use_extended_stats=true) at clausesel.c:153 #9  0x00005573f9a57e30 in clauselist_selectivity (root=0x5573fad534e8, clauses=0x5573fad0b2d8,
    varRelid=0, jointype=JOIN_INNER, sjinfo=0x0) at clausesel.c:106
#10 0x00005573f9a62e03 in set_baserel_size_estimates (root=0x5573fad534e8, rel=0x5573fad54b38)
    at costsize.c:5247
#11 0x00005573f9a51aa5 in set_plain_rel_size (root=0x5573fad534e8, rel=0x5573fad54b38,
    rte=0x5573fad0ec58) at allpaths.c:581
#12 0x00005573f9a516ce in set_rel_size (root=0x5573fad534e8, rel=0x5573fad54b38, rti=1,
    rte=0x5573fad0ec58) at allpaths.c:411
#13 0x00005573f9a514c7 in set_base_rel_sizes (root=0x5573fad534e8) at allpaths.c:322 #14 0x00005573f9a5119d in make_one_rel (root=0x5573fad534e8, joinlist=0x5573fad0adf8) at allpaths.c:183
#15 0x00005573f9a94d45 in query_planner (root=0x5573fad534e8,
    qp_callback=0x5573f9a9b59e <standard_qp_callback>, qp_extra=0x7ffe2e43f540) at planmain.c:280 #16 0x00005573f9a977a8 in grouping_planner (root=0x5573fad534e8, tuple_fraction=0, setops=0x0)
    at planner.c:1520
#17 0x00005573f9a96e47 in subquery_planner (glob=0x5573fad533d8, parse=0x5573fad0ea48, parent_root=0x0,
    hasRecursion=false, tuple_fraction=0, setops=0x0) at planner.c:1089
#18 0x00005573f9a954aa in standard_planner (parse=0x5573fad0ea48,
    query_string=0x5573fad8b3b0 "explain analyze SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = '1'", cursorOptions=2048, boundParams=0x0) at planner.c:415
#19 0x00005573f9a951d4 in planner (parse=0x5573fad0ea48,
--Type <RET> for more, q to quit, c to continue without paging--
    query_string=0x5573fad8b3b0 "explain analyze SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = '1'", cursorOptions=2048, boundParams=0x0) at planner.c:282
#20 0x00005573f9bf4e2e in pg_plan_query (querytree=0x5573fad0ea48,
    query_string=0x5573fad8b3b0 "explain analyze SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = '1'", cursorOptions=2048, boundParams=0x0) at postgres.c:904 #21 0x00005573f98613e7 in standard_ExplainOneQuery (query=0x5573fad0ea48, cursorOptions=2048, into=0x0,
    es=0x5573fad57da0,
    queryString=0x5573fad8b3b0 "explain analyze SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = '1'", params=0x0, queryEnv=0x0) at explain.c:489 #22 0x00005573f9861205 in ExplainOneQuery (query=0x5573fad0ea48, cursorOptions=2048, into=0x0,
    es=0x5573fad57da0,
    queryString=0x5573fad8b3b0 "explain analyze SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = '1'", params=0x0, queryEnv=0x0) at explain.c:445 #23 0x00005573f9860e35 in ExplainQuery (pstate=0x5573fad57c90, stmt=0x5573fad8b5a0, params=0x0,
    dest=0x5573fad57c00) at explain.c:341
#24 0x00005573f9bff3a8 in standard_ProcessUtility (pstmt=0x5573fad8b490,
    queryString=0x5573fad8b3b0 "explain analyze SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = '1'", readOnlyTree=false, context=PROCESS_UTILITY_QUERY, params=0x0,
    queryEnv=0x0, dest=0x5573fad57c00, qc=0x7ffe2e43fcd0) at utility.c:863
#25 0x00005573f9bfe91a in ProcessUtility (pstmt=0x5573fad8b490,
    queryString=0x5573fad8b3b0 "explain analyze SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = '1'", readOnlyTree=false, context=PROCESS_UTILITY_QUERY, params=0x0,
--Type <RET> for more, q to quit, c to continue without paging--
    queryEnv=0x0, dest=0x5573fad57c00, qc=0x7ffe2e43fcd0) at utility.c:523
#26 0x00005573f9bfd195 in PortalRunUtility (portal=0x5573fac6bcf0, pstmt=0x5573fad8b490,     isTopLevel=false, setHoldSnapshot=true, dest=0x5573fad57c00, qc=0x7ffe2e43fcd0) at pquery.c:1158 #27 0x00005573f9bfced2 in FillPortalStore (portal=0x5573fac6bcf0, isTopLevel=false) at pquery.c:1031 #28 0x00005573f9bfd778 in PortalRunFetch (portal=0x5573fac6bcf0, fdirection=FETCH_FORWARD, count=10,
    dest=0x5573fa1d6880 <spi_printtupDR>) at pquery.c:1442
#29 0x00005573f9992675 in _SPI_cursor_operation (portal=0x5573fac6bcf0, direction=FETCH_FORWARD,
    count=10, dest=0x5573fa1d6880 <spi_printtupDR>) at spi.c:3019
#30 0x00005573f9990849 in SPI_cursor_fetch (portal=0x5573fac6bcf0, forward=true, count=10) at spi.c:1805 #31 0x00007a25603e0aa5 in exec_for_query (estate=0x7ffe2e440200, stmt=0x5573fad067c8,
    portal=0x5573fac6bcf0, prefetch_ok=true) at pl_exec.c:5889
#32 0x00007a25603de728 in exec_stmt_dynfors (estate=0x7ffe2e440200, stmt=0x5573fad067c8)
    at pl_exec.c:4647
#33 0x00007a25603d8b1c in exec_stmts (estate=0x7ffe2e440200, stmts=0x5573fad06ec8) at pl_exec.c:2100 #34 0x00007a25603d8697 in exec_stmt_block (estate=0x7ffe2e440200, block=0x5573fad06f18) at pl_exec.c:1943 #35 0x00007a25603d7d9e in exec_toplevel_block (estate=0x7ffe2e440200, block=0x5573fad06f18)
    at pl_exec.c:1634
#36 0x00007a25603d5a2e in plpgsql_exec_function (func=0x5573fac2c1e0, fcinfo=0x5573fad2af60,     simple_eval_estate=0x0, simple_eval_resowner=0x0, procedure_resowner=0x0, atomic=true)
    at pl_exec.c:623
#37 0x00007a25603f277f in plpgsql_call_handler (fcinfo=0x5573fad2af60) at pl_handler.c:277 #38 0x00005573f993589a in ExecMakeTableFunctionResult (setexpr=0x5573facfd8c8, econtext=0x5573facfd798,
--Type <RET> for more, q to quit, c to continue without paging--
    argContext=0x5573fad2ae60, expectedDesc=0x5573facfe130, randomAccess=false) at execSRF.c:234 #39 0x00005573f995299c in FunctionNext (node=0x5573facfd588) at nodeFunctionscan.c:94 #40 0x00005573f993735f in ExecScanFetch (node=0x5573facfd588, accessMtd=0x5573f99528e6 <FunctionNext>,
    recheckMtd=0x5573f9952ced <FunctionRecheck>) at execScan.c:131
#41 0x00005573f99373d8 in ExecScan (node=0x5573facfd588, accessMtd=0x5573f99528e6 <FunctionNext>,
    recheckMtd=0x5573f9952ced <FunctionRecheck>) at execScan.c:180
#42 0x00005573f9952d46 in ExecFunctionScan (pstate=0x5573facfd588) at nodeFunctionscan.c:269 #43 0x00005573f9932c7f in ExecProcNodeFirst (node=0x5573facfd588) at execProcnode.c:464
#44 0x00005573f9925df5 in ExecProcNode (node=0x5573facfd588)
    at ../../../src/include/executor/executor.h:274
#45 0x00005573f9928bf9 in ExecutePlan (estate=0x5573facfd360, planstate=0x5573facfd588,     use_parallel_mode=false, operation=CMD_SELECT, sendTuples=true, numberTuples=0,     direction=ForwardScanDirection, dest=0x5573fad8f6e0, execute_once=true) at execMain.c:1646
#46 0x00005573f992653d in standard_ExecutorRun (queryDesc=0x5573fad87f70,
    direction=ForwardScanDirection, count=0, execute_once=true) at execMain.c:363 #47 0x00005573f9926316 in ExecutorRun (queryDesc=0x5573fad87f70, direction=ForwardScanDirection,
    count=0, execute_once=true) at execMain.c:304
#48 0x00005573f9bfcb7d in PortalRunSelect (portal=0x5573fac6bbe0, forward=true, count=0,
    dest=0x5573fad8f6e0) at pquery.c:924
#49 0x00005573f9bfc7a5 in PortalRun (portal=0x5573fac6bbe0, count=9223372036854775807, isTopLevel=true,     run_once=true, dest=0x5573fad8f6e0, altdest=0x5573fad8f6e0, qc=0x7ffe2e440a60) at pquery.c:768
#50 0x00005573f9bf5512 in exec_simple_query (
--Type <RET> for more, q to quit, c to continue without paging--
    query_string=0x5573fabea030 "SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = ''1''');") at postgres.c:1274
#51 0x00005573f9bfa5b7 in PostgresMain (dbname=0x5573fab52240 "regression",
    username=0x5573fac27c98 "alena") at postgres.c:4680
#52 0x00005573f9bf137e in BackendMain (startup_data=0x7ffe2e440ce4 "", startup_data_len=4)
    at backend_startup.c:105
#53 0x00005573f9b06852 in postmaster_child_launch (child_type=B_BACKEND, startup_data=0x7ffe2e440ce4 "",
    startup_data_len=4, client_sock=0x7ffe2e440d30) at launch_backend.c:265
#54 0x00005573f9b0cd66 in BackendStartup (client_sock=0x7ffe2e440d30) at postmaster.c:3593
#55 0x00005573f9b09db1 in ServerLoop () at postmaster.c:1674
#56 0x00005573f9b09678 in PostmasterMain (argc=8, argv=0x5573fab500d0) at postmaster.c:1372
#57 0x00005573f99b5f79 in main (argc=8, argv=0x5573fab500d0) at main.c:197


Secondly,Isawdiffchangesinqueriesthatshowedcaseswherethe optimizerdid noteliminateoneofthe redundantexpressionsandprocessedbothof them.Thisindicatestheproblemthatthe optimizerhas notlearnedhow to handleitinallcases.IthinkI'll needtoaddsomecodetohandleit.

 EXPLAIN (COSTS OFF)
 SELECT count(*) FROM tenk1
   WHERE hundred = 42 AND (thousand = 42 OR thousand = 99 OR tenthous < 2) OR thousand = 41;
-                                                         QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------
+ QUERY PLAN
+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Aggregate
    ->  Bitmap Heap Scan on tenk1
-         Recheck Cond: (((hundred = 42) AND ((thousand = ANY ('{42,99}'::integer[])) OR (tenthous < 2))) OR (thousand = 41)) +         Recheck Cond: (((((thousand = 42) AND (thousand = ANY ('{42,99}'::integer[]))) OR ((thousand = 99) AND (thousand = ANY ('{42,99}'::integer[])))) OR (tenthous < 2)) OR (thousand = 41)) +         Filter: (((hundred = 42) AND ((((thousand = 42) OR (thousand = 99)) AND (thousand = ANY ('{42,99}'::integer[]))) OR (tenthous < 2))) OR (thousand = 41))
          ->  BitmapOr
-               ->  BitmapAnd
-                     ->  Bitmap Index Scan on tenk1_hundred
-                           Index Cond: (hundred = 42)
+               ->  BitmapOr
                      ->  BitmapOr
                            ->  Bitmap Index Scan on tenk1_thous_tenthous
-                                 Index Cond: (thousand = ANY ('{42,99}'::integer[])) +                                 Index Cond: ((thousand = 42) AND (thousand = ANY ('{42,99}'::integer[])))
                            ->  Bitmap Index Scan on tenk1_thous_tenthous
-                                 Index Cond: (tenthous < 2)
+                                 Index Cond: ((thousand = 99) AND (thousand = ANY ('{42,99}'::integer[])))
+                     ->  Bitmap Index Scan on tenk1_thous_tenthous
+                           Index Cond: (tenthous < 2)
                ->  Bitmap Index Scan on tenk1_thous_tenthous
                      Index Cond: (thousand = 41)
-(14 rows)
+(15 rows)

 SELECT count(*) FROM tenk1
   WHERE hundred = 42 AND (thousand = 42 OR thousand = 99 OR tenthous < 2) OR thousand = 41;
@@ -1986,20 +1987,21 @@
 EXPLAIN (COSTS OFF)
 SELECT count(*) FROM tenk1
   WHERE hundred = 42 AND (thousand = 42 OR thousand = 41 OR thousand = 99 AND tenthous = 2);
-                                                          QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------
+ QUERY PLAN
+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Aggregate
    ->  Bitmap Heap Scan on tenk1
-         Recheck Cond: ((hundred = 42) AND ((thousand = ANY ('{41,42}'::integer[])) OR ((thousand = 99) AND (tenthous = 2))))
-         ->  BitmapAnd
-               ->  Bitmap Index Scan on tenk1_hundred
-                     Index Cond: (hundred = 42)
+         Recheck Cond: ((((thousand = 42) AND (thousand = ANY ('{41,42}'::integer[]))) OR ((thousand = 41) AND (thousand = ANY ('{41,42}'::integer[])))) OR ((thousand = 99) AND (tenthous = 2)))
+         Filter: (hundred = 42)
+         ->  BitmapOr
                ->  BitmapOr
                      ->  Bitmap Index Scan on tenk1_thous_tenthous
-                           Index Cond: (thousand = ANY ('{41,42}'::integer[])) +                           Index Cond: ((thousand = 42) AND (thousand = ANY ('{41,42}'::integer[])))
                      ->  Bitmap Index Scan on tenk1_thous_tenthous
-                           Index Cond: ((thousand = 99) AND (tenthous = 2))
-(11 rows)
+                           Index Cond: ((thousand = 41) AND (thousand = ANY ('{41,42}'::integer[])))
+               ->  Bitmap Index Scan on tenk1_thous_tenthous
+                     Index Cond: ((thousand = 99) AND (tenthous = 2))
+(12 rows)

 SELECT count(*) FROM tenk1
   WHERE hundred = 42 AND (thousand = 42 OR thousand = 41 OR thousand = 99 AND tenthous = 2); diff -U3 /home/alena/postgrespro5/src/test/regress/expected/inherit.out /home/alena/postgrespro5/src/test/regress/results/inherit.out --- /home/alena/postgrespro5/src/test/regress/expected/inherit.out 2024-06-20 12:28:52.324011724 +0300 +++ /home/alena/postgrespro5/src/test/regress/results/inherit.out 2024-07-11 02:00:55.404006843 +0300
@@ -2126,7 +2126,7 @@
                                    QUERY PLAN
 
---------------------------------------------------------------------------------
  Seq Scan on part_ab_cd list_parted
-   Filter: (((a)::text = 'ab'::text) OR ((a)::text = ANY ('{NULL,cd}'::text[]))) +   Filter: (((a)::text = ANY ('{NULL,cd}'::text[])) OR ((a)::text = 'ab'::text))
 (2 rows)

 explain (costs off) select * from list_parted where a = 'ab';
diff -U3 /home/alena/postgrespro5/src/test/regress/expected/join.out /home/alena/postgrespro5/src/test/regress/results/join.out --- /home/alena/postgrespro5/src/test/regress/expected/join.out 2024-06-28 11:05:44.304135987 +0300 +++ /home/alena/postgrespro5/src/test/regress/results/join.out 2024-07-11 02:00:58.152006921 +0300
@@ -4210,10 +4210,17 @@
 select * from tenk1 a join tenk1 b on
   (a.unique1 = 1 and b.unique1 = 2) or
   ((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
-                                                       QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------
  Nested Loop
-   Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR ((a.unique2 = ANY ('{3,7}'::integer[])) AND (b.hundred = 4))) +   Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR (((a.unique2 = 3) OR (a.unique2 = 7)) AND (a.unique2 = ANY ('{3,7}'::integer[])) AND (b.hundred = 4)))
+   ->  Bitmap Heap Scan on tenk1 a
+         Recheck Cond: ((unique1 = 1) OR (unique2 = ANY ('{3,7}'::integer[])))
+         ->  BitmapOr
+               ->  Bitmap Index Scan on tenk1_unique1
+                     Index Cond: (unique1 = 1)
+               ->  Bitmap Index Scan on tenk1_unique2
+                     Index Cond: (unique2 = ANY ('{3,7}'::integer[]))
    ->  Bitmap Heap Scan on tenk1 b
          Recheck Cond: ((unique1 = 2) OR (hundred = 4))
          ->  BitmapOr
@@ -4221,25 +4228,24 @@
                      Index Cond: (unique1 = 2)
                ->  Bitmap Index Scan on tenk1_hundred
                      Index Cond: (hundred = 4)
-   ->  Materialize
-         ->  Bitmap Heap Scan on tenk1 a
-               Recheck Cond: ((unique1 = 1) OR (unique2 = ANY ('{3,7}'::integer[])))
-               ->  BitmapOr
-                     ->  Bitmap Index Scan on tenk1_unique1
-                           Index Cond: (unique1 = 1)
-                     ->  Bitmap Index Scan on tenk1_unique2
-                           Index Cond: (unique2 = ANY ('{3,7}'::integer[]))
-(17 rows)
+(16 rows)

 SET enable_or_transformation = on;
 explain (costs off)
 select * from tenk1 a join tenk1 b on
   (a.unique1 = 1 and b.unique1 = 2) or
   ((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
-                                                       QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------
  Nested Loop
-   Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR ((a.unique2 = ANY ('{3,7}'::integer[])) AND (b.hundred = 4))) +   Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR (((a.unique2 = 3) OR (a.unique2 = 7)) AND (a.unique2 = ANY ('{3,7}'::integer[])) AND (b.hundred = 4)))
+   ->  Bitmap Heap Scan on tenk1 a
+         Recheck Cond: ((unique1 = 1) OR (unique2 = ANY ('{3,7}'::integer[])))
+         ->  BitmapOr
+               ->  Bitmap Index Scan on tenk1_unique1
+                     Index Cond: (unique1 = 1)
+               ->  Bitmap Index Scan on tenk1_unique2
+                     Index Cond: (unique2 = ANY ('{3,7}'::integer[]))
    ->  Bitmap Heap Scan on tenk1 b
          Recheck Cond: ((unique1 = 2) OR (hundred = 4))
          ->  BitmapOr
@@ -4247,37 +4253,29 @@
                      Index Cond: (unique1 = 2)
                ->  Bitmap Index Scan on tenk1_hundred
                      Index Cond: (hundred = 4)
-   ->  Materialize
-         ->  Bitmap Heap Scan on tenk1 a
-               Recheck Cond: ((unique1 = 1) OR (unique2 = ANY ('{3,7}'::integer[])))
-               ->  BitmapOr
-                     ->  Bitmap Index Scan on tenk1_unique1
-                           Index Cond: (unique1 = 1)
-                     ->  Bitmap Index Scan on tenk1_unique2
-                           Index Cond: (unique2 = ANY ('{3,7}'::integer[]))
-(17 rows)
+(16 rows)

 explain (costs off)
 select * from tenk1 a join tenk1 b on
   (a.unique1 < 20 or a.unique1 = 3 or a.unique1 = 1 and b.unique1 = 2) or
   ((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
- QUERY PLAN
----------------------------------------------------------------------------------------------------------------------------------------------------------------
+ QUERY PLAN
+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Nested Loop
-   Join Filter: ((a.unique1 < 20) OR (a.unique1 = 3) OR ((a.unique1 = 1) AND (b.unique1 = 2)) OR ((a.unique2 = ANY ('{3,7}'::integer[])) AND (b.hundred = 4))) +   Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR (((a.unique2 = 3) OR (a.unique2 = 7)) AND (a.unique2 = ANY ('{3,7}'::integer[])) AND (b.hundred = 4)) OR (a.unique1 < 20) OR (a.unique1 = 3))
    ->  Seq Scan on tenk1 b
    ->  Materialize
          ->  Bitmap Heap Scan on tenk1 a
-               Recheck Cond: ((unique1 < 20) OR (unique1 = 3) OR (unique1 = 1) OR (unique2 = ANY ('{3,7}'::integer[]))) +               Recheck Cond: ((unique1 = 1) OR (unique2 = ANY ('{3,7}'::integer[])) OR (unique1 < 20) OR (unique1 = 3))
                ->  BitmapOr
                      ->  Bitmap Index Scan on tenk1_unique1
-                           Index Cond: (unique1 < 20)
-                     ->  Bitmap Index Scan on tenk1_unique1
-                           Index Cond: (unique1 = 3)
-                     ->  Bitmap Index Scan on tenk1_unique1
                            Index Cond: (unique1 = 1)
                      ->  Bitmap Index Scan on tenk1_unique2
                            Index Cond: (unique2 = ANY ('{3,7}'::integer[]))
+                     ->  Bitmap Index Scan on tenk1_unique1
+                           Index Cond: (unique1 < 20)
+                     ->  Bitmap Index Scan on tenk1_unique1
+                           Index Cond: (unique1 = 3)
 (15 rows)


Thirdly,Ihaveevidencethatthismayaffecttheunderestimationof power.I'll lookinto thisin detaillater.

diff -U3 /home/alena/postgrespro5/src/test/regress/expected/stats_ext.out /home/alena/postgrespro5/src/test/regress/results/stats_ext.out --- /home/alena/postgrespro5/src/test/regress/expected/stats_ext.out 2024-06-28 11:05:44.304135987 +0300 +++ /home/alena/postgrespro5/src/test/regress/results/stats_ext.out 2024-07-11 02:01:06.596007159 +0300
@@ -1156,19 +1156,19 @@
 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a = 1 OR a = 51) AND b = ''1''');
  estimated | actual
 -----------+--------
-         2 |    100
+         1 |    100
 (1 row)

 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a = 1 OR a = 51) AND (b = ''1'' OR b = ''2'')');
  estimated | actual
 -----------+--------
-         4 |    100
+         1 |    100
 (1 row)

 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a = 1 OR a = 2 OR a = 51 OR a = 52) AND (b = ''1'' OR b = ''2'')');
  estimated | actual
 -----------+--------
-         8 |    200
+         1 |    200
 (1 row)

 -- OR clauses referencing different attributes
@@ -1322,19 +1322,19 @@
 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a = 1 OR a = 51) AND b = ''1''');
  estimated | actual
 -----------+--------
-       100 |    100
+         2 |    100
 (1 row)

 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a = 1 OR a = 51) AND (b = ''1'' OR b = ''2'')');
  estimated | actual
 -----------+--------
-       100 |    100
+         2 |    100
 (1 row)

 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a = 1 OR a = 2 OR a = 51 OR a = 52) AND (b = ''1'' OR b = ''2'')');
  estimated | actual
 -----------+--------
-       200 |    200
+         8 |    200
 (1 row)

--
Regards,
Alena Rybakina
Postgres Professional:http://www.postgrespro.com
The Russian Postgres Company
diff --git a/src/backend/nodes/queryjumblefuncs.c 
b/src/backend/nodes/queryjumblefuncs.c
index 129fb447099..b2b457b614c 100644
--- a/src/backend/nodes/queryjumblefuncs.c
+++ b/src/backend/nodes/queryjumblefuncs.c
@@ -140,6 +140,33 @@ JumbleQuery(Query *query)
        return jstate;
 }
 
+JumbleState *
+JumbleExpr(Expr *expr, uint64 *queryId)
+{
+       JumbleState *jstate = NULL;
+
+       Assert(queryId != NULL);
+
+       jstate = (JumbleState *) palloc(sizeof(JumbleState));
+
+       /* Set up workspace for query jumbling */
+       jstate->jumble = (unsigned char *) palloc(JUMBLE_SIZE);
+       jstate->jumble_len = 0;
+       jstate->clocations_buf_size = 32;
+       jstate->clocations = (LocationLen *)
+               palloc(jstate->clocations_buf_size * sizeof(LocationLen));
+       jstate->clocations_count = 0;
+       jstate->highest_extern_param_id = 0;
+
+       /* Compute query ID */
+       _jumbleNode(jstate, (Node *) expr);
+       *queryId = DatumGetUInt64(hash_any_extended(jstate->jumble,
+                                                                               
                jstate->jumble_len,
+                                                                               
                0));
+
+       return jstate;
+}
+
 /*
  * Enables query identifier computation.
  *
diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c
index 00cd7358ebb..0216d61b801 100644
--- a/src/backend/parser/parse_expr.c
+++ b/src/backend/parser/parse_expr.c
@@ -16,12 +16,15 @@
 #include "postgres.h"
 
 #include "catalog/pg_aggregate.h"
+#include "catalog/pg_operator.h"
 #include "catalog/pg_proc.h"
 #include "catalog/pg_type.h"
 #include "commands/dbcommands.h"
+#include "common/hashfn.h"
 #include "miscadmin.h"
 #include "nodes/makefuncs.h"
 #include "nodes/nodeFuncs.h"
+#include "nodes/queryjumble.h"
 #include "optimizer/optimizer.h"
 #include "parser/analyze.h"
 #include "parser/parse_agg.h"
@@ -41,6 +44,9 @@
 #include "utils/lsyscache.h"
 #include "utils/timestamp.h"
 #include "utils/xml.h"
+#include "utils/syscache.h"
+
+bool           enable_or_transformation = true;
 
 /* GUC parameters */
 bool           Transform_null_equals = false;
@@ -110,6 +116,415 @@ static Expr *make_distinct_op(ParseState *pstate, List 
*opname,
 static Node *make_nulltest_from_distinct(ParseState *pstate,
                                                                                
 A_Expr *distincta, Node *arg);
 
+typedef struct OrClauseGroupKey
+{
+       NodeTag type;
+
+       Expr   *expr; /* Pointer to the expression tree which has been a source 
for
+                                       the hashkey value */
+       Oid             opno;
+       Oid             exprtype;
+} OrClauseGroupKey;
+
+typedef struct OrClauseGroupEntry
+{
+       OrClauseGroupKey        key;
+
+       List                       *consts;
+       List                       *exprs;
+       FunctionCallInfo        fcinfo;
+} OrClauseGroupEntry;
+
+/*
+ * Hash function to find candidate clauses.
+ */
+static uint32
+orclause_hash(const void *data, Size keysize)
+{
+       OrClauseGroupKey   *key = (OrClauseGroupKey *) data;
+       uint64                          exprHash;
+
+       Assert(keysize == sizeof(OrClauseGroupKey));
+       Assert(IsA(data, Invalid));
+
+       (void) JumbleExpr(key->expr, &exprHash);
+
+       return hash_combine((uint32) exprHash,
+                                               hash_combine((uint32) key->opno,
+                                                                        
(uint32) key->exprtype));
+}
+
+static void *
+orclause_keycopy(void *dest, const void *src, Size keysize)
+{
+       OrClauseGroupKey *src_key = (OrClauseGroupKey *) src;
+       OrClauseGroupKey *dst_key = (OrClauseGroupKey *) dest;
+
+       Assert(sizeof(OrClauseGroupKey) == keysize);
+       Assert(IsA(src, Invalid));
+
+       dst_key->type = T_Invalid;
+       dst_key->expr = src_key->expr;
+       dst_key->opno = src_key->opno;
+       dst_key->exprtype = src_key->exprtype;
+       return dst_key;
+}
+
+/*
+ * Dynahash match function to use in or_group_htab
+ */
+static int
+orclause_match(const void *data1, const void *data2, Size keysize)
+{
+       OrClauseGroupKey   *key1 = (OrClauseGroupKey *) data1;
+       OrClauseGroupKey   *key2 = (OrClauseGroupKey *) data2;
+
+       Assert(sizeof(OrClauseGroupKey) == keysize);
+       Assert(IsA(key1, Invalid));
+       Assert(IsA(key2, Invalid));
+
+       if (key1->opno == key2->opno &&
+               key1->exprtype == key2->exprtype &&
+               equal(key1->expr, key2->expr))
+               return 0;
+
+       return 1;
+}
+
+static FunctionCallInfo locfcinfo = NULL;
+
+static int
+saop_const_comparator(const ListCell *a, const ListCell *b)
+{
+       Node   *leftop = (Node *) lfirst(a);
+       Node   *rightop = (Node *) lfirst(b);
+
+       if (IsA(leftop, RelabelType))
+               leftop = (Node *) ((RelabelType *) leftop)->arg;
+
+       if (IsA(rightop, RelabelType))
+               rightop = (Node *) ((RelabelType *) rightop)->arg;
+
+       Assert(IsA(leftop, Const) && IsA(rightop, Const));
+
+       locfcinfo->args[0].value = ((Const *) leftop)->constvalue;
+       locfcinfo->args[0].isnull = false;
+       locfcinfo->args[1].value = ((Const *) rightop)->constvalue;
+       locfcinfo->args[1].isnull = false;
+       return DatumGetInt32(FunctionCallInvoke(locfcinfo));
+}
+
+static List *
+saop_delete_duplicates(ParseState *pstate, OrClauseGroupEntry *entry,
+                                          Oid scalar_type)
+{
+       ListCell   *lc;
+       List       *result;
+
+       locfcinfo = entry->fcinfo;
+       list_sort(entry->consts, saop_const_comparator);
+
+       result = list_make1(linitial(entry->consts));
+       for_each_from(lc, entry->consts, 1)
+       {
+               Node *node = (Node *) lfirst(lc);
+
+               if (equal(llast(result), node))
+                       continue;
+
+               node = coerce_to_common_type(pstate, node, scalar_type, "IN");
+               result = lappend(result, node);
+       }
+
+       return result;
+}
+
+/*
+ * TransformOrExprToANY -
+ *       Discover the args of an OR expression and try to group similar OR
+ *       expressions to an ANY operation.
+ *       Transformation must be already done on input args list before the 
call.
+ *       Transformation groups two-sided equality operations. One side of such 
an
+ *       operation must be plain constant or constant expression. The other 
side of
+ *       the clause must be a variable expression without volatile functions.
+ *       The grouping technique is based on an equivalence of variable sides 
of the
+ *       expression: using queryId and equal() routine, it groups constant 
sides of
+ *       similar clauses into an array. After the grouping procedure, each 
couple
+ *       ('variable expression' and 'constant array') form a new SAOP 
operation,
+ *       which is added to the args list of the returning expression.
+ *
+ *       NOTE: function returns OR BoolExpr if more than one clause are 
detected in
+ *       the final args list, or ScalarArrayOpExpr if all args were grouped 
into
+ *       the single SAOP expression.
+ */
+static Node *
+TransformOrExprToANY(ParseState *pstate, List *args, int location)
+{
+       List                               *or_list = NIL;
+       List                               *groups = NIL;
+       List                               *unconvinient_ors = NIL;
+       ListCell                           *lc;
+       HASHCTL                                 info;
+       HTAB                               *or_group_htab = NULL;
+       int                                     len_ors = list_length(args);
+       OrClauseGroupEntry         *entry = NULL;
+
+       Assert(enable_or_transformation && len_ors > 1);
+
+       MemSet(&info, 0, sizeof(info));
+       info.keysize = sizeof(OrClauseGroupKey);
+       info.entrysize = sizeof(OrClauseGroupEntry);
+       info.hash = orclause_hash;
+       info.keycopy = orclause_keycopy;
+       info.match = orclause_match;
+       or_group_htab = hash_create("OR Groups",
+                                                               len_ors,
+                                                               &info,
+                                                               HASH_ELEM | 
HASH_FUNCTION | HASH_COMPARE | HASH_KEYCOPY);
+
+       foreach(lc, args)
+       {
+               Node                               *orqual = lfirst(lc);
+               Node                               *const_expr;
+               Node                               *nconst_expr;
+               OrClauseGroupKey                hashkey;
+               bool                                    found;
+               Oid                                             opno;
+               Oid                                             exprtype;
+               Node                               *leftop, *rightop;
+               TypeCacheEntry             *typentry;
+
+               if (!IsA(orqual, OpExpr))
+               {
+                       unconvinient_ors = lappend(unconvinient_ors, orqual);
+                       continue;
+               }
+
+               opno = ((OpExpr *) orqual)->opno;
+               if (get_op_rettype(opno) != BOOLOID)
+               {
+                       /* Only operator returning boolean suits OR -> ANY 
transformation */
+                       unconvinient_ors = lappend(unconvinient_ors, orqual);
+                       continue;
+               }
+
+               /*
+                * Detect the constant side of the clause. Recall non-constant
+                * expression can be made not only with Vars, but also with 
Params,
+                * which is not bonded with any relation. Thus, we detect the 
const
+                * side - if another side is constant too, the orqual couldn't 
be
+                * an OpExpr.
+                * Get pointers to constant and expression sides of the qual.
+                */
+               leftop = get_leftop(orqual);
+               if (IsA(leftop, RelabelType))
+                       leftop = (Node *) ((RelabelType *) leftop)->arg;
+               rightop = get_rightop(orqual);
+               if (IsA(rightop, RelabelType))
+                       rightop = (Node *) ((RelabelType *) rightop)->arg;
+
+               if (IsA(leftop, Const))
+               {
+                       opno = get_commutator(opno);
+
+                       if (!OidIsValid(opno))
+                       {
+                               /* commutator doesn't exist, we can't reverse 
the order */
+                               unconvinient_ors = lappend(unconvinient_ors, 
orqual);
+                               continue;
+                       }
+
+                       nconst_expr = get_rightop(orqual);
+                       const_expr = get_leftop(orqual);
+               }
+               else if (IsA(rightop, Const))
+               {
+                       const_expr = get_rightop(orqual);
+                       nconst_expr = get_leftop(orqual);
+               }
+               else
+               {
+                       unconvinient_ors = lappend(unconvinient_ors, orqual);
+                       continue;
+               }
+
+               /*
+                * Transformation only works with both side type is not
+                * { array | composite | domain | record }.
+                * Also, forbid it for volatile expressions.
+                */
+               exprtype = exprType(nconst_expr);
+               if (type_is_rowtype(exprType(const_expr)) ||
+                       type_is_rowtype(exprtype) ||
+                       contain_volatile_functions((Node *) nconst_expr))
+               {
+                       unconvinient_ors = lappend(unconvinient_ors, orqual);
+                       continue;
+               }
+
+               typentry = lookup_type_cache(exprtype, 
TYPECACHE_CMP_PROC_FINFO);
+
+               /*
+                * Within this transformation we remove duplicates. To avoid
+                * quadratic behavior we need to sort clauses after making a 
list of
+                * elements. So, need sort operator to implement that.
+                */
+               if (!OidIsValid(typentry->cmp_proc_finfo.fn_oid))
+               {
+                       unconvinient_ors = lappend(unconvinient_ors, orqual);
+                       continue;
+               }
+
+               /*
+               * At this point we definitely have a transformable clause.
+               * Classify it and add into specific group of clauses, or create 
new
+               * group.
+               */
+               hashkey.type = T_Invalid;
+               hashkey.expr = (Expr *) nconst_expr;
+               hashkey.opno = opno;
+               hashkey.exprtype = exprtype;
+               entry = hash_search(or_group_htab, &hashkey, HASH_ENTER, 
&found);
+
+               if (unlikely(found))
+               {
+                       entry->consts = lappend(entry->consts, const_expr);
+                       entry->exprs = lappend(entry->exprs, orqual);
+               }
+               else
+               {
+                       entry->consts = list_make1(const_expr);
+                       entry->exprs = list_make1(orqual);
+
+                       /* Prepare funcall for sort comparator */
+                       entry->fcinfo =
+                                               (FunctionCallInfo) 
palloc(SizeForFunctionCallInfo(2));
+                       InitFunctionCallInfoData(*(entry->fcinfo),
+                                                                        
&typentry->cmp_proc_finfo, 2,
+                                                                        
typentry->typcollation, NULL, NULL);
+
+                       /*
+                        * Add the entry to the list. It is needed exclusively 
to manage the
+                        * problem with the order of transformed clauses in 
explain.
+                        * Hash value can depend on the platform and version. 
Hence,
+                        * sequental scan of the hash table would prone to 
change the order
+                        * of clauses in lists and, as a result, break 
regression tests
+                        * accidentially.
+                        */
+                       groups = lappend(groups, entry);
+               }
+       }
+
+       /* Let's convert each group of clauses to an IN operation. */
+
+       /*
+        * Go through the list of groups and convert each, where number of
+        * consts more than 1. trivial groups move to OR-list again
+        */
+       foreach (lc, groups)
+       {
+               Oid                                 scalar_type;
+               Oid                                     array_type;
+
+               if (!IsA(lfirst(lc), Invalid))
+               {
+                       unconvinient_ors = lappend(unconvinient_ors, 
lfirst(lc));
+                       continue;
+               }
+
+               entry = (OrClauseGroupEntry *) lfirst(lc);
+
+               Assert(list_length(entry->consts) > 0);
+               Assert(list_length(entry->exprs) == list_length(entry->consts));
+
+               if (list_length(entry->consts) == 1)
+               {
+                       /*
+                        * Only one element returns origin expression into the 
BoolExpr args
+                        * list unchanged.
+                        */
+                       list_free(entry->consts);
+                       unconvinient_ors = list_concat(unconvinient_ors, 
entry->exprs);
+                       continue;
+               }
+
+               /*
+                * Do the transformation.
+                */
+
+               scalar_type = entry->key.exprtype;
+               array_type = OidIsValid(scalar_type) ? 
get_array_type(scalar_type) :
+                                                                               
           InvalidOid;
+
+               if (OidIsValid(array_type))
+               {
+                       /*
+                        * OK: coerce all the right-hand non-Var inputs to the 
common
+                        * type and build an ArrayExpr for them.
+                        */
+                       List                       *aexprs = NIL;
+                       ArrayExpr                  *newa = NULL;
+                       ScalarArrayOpExpr  *saopexpr = NULL;
+                       HeapTuple                       opertup;
+                       Form_pg_operator        operform;
+                       List                       *namelist = NIL;
+
+                       aexprs = saop_delete_duplicates(pstate, entry, 
scalar_type);
+
+                       newa = makeNode(ArrayExpr);
+                       /* array_collid will be set by parse_collate.c */
+                       newa->element_typeid = scalar_type;
+                       newa->array_typeid = array_type;
+                       newa->multidims = false;
+                       newa->elements = aexprs;
+                       newa->location = -1;
+
+                       opertup = SearchSysCache1(OPEROID,
+                                                                         
ObjectIdGetDatum(entry->key.opno));
+                       if (!HeapTupleIsValid(opertup))
+                               elog(ERROR, "cache lookup failed for operator 
%u",
+                                        entry->key.opno);
+
+                       operform = (Form_pg_operator) GETSTRUCT(opertup);
+                       if (!OperatorIsVisible(entry->key.opno))
+                               namelist = lappend(namelist, 
makeString(get_namespace_name(operform->oprnamespace)));
+
+                       namelist = lappend(namelist, 
makeString(pstrdup(NameStr(operform->oprname))));
+                       ReleaseSysCache(opertup);
+
+                       saopexpr =
+                               (ScalarArrayOpExpr *)
+                                       make_scalar_array_op(pstate,
+                                                                               
 namelist,
+                                                                               
 true,
+                                                                               
 (Node *) entry->key.expr,
+                                                                               
 (Node *) newa,
+                                                                               
 -1);
+
+                       or_list = lappend(or_list, makeBoolExpr(AND_EXPR, 
list_make2(makeBoolExpr(OR_EXPR, entry->exprs, location), saopexpr), -1));
+               }
+               else
+               {
+                       /*
+                        * If the const node (right side of operator 
expression) 's type
+                        *  don't have “true” array type, then we cannnot do 
the transformation.
+                        * We simply concatenate the expression node.
+                        *
+                        */
+                       list_free(entry->consts);
+                       unconvinient_ors = list_concat(unconvinient_ors, 
entry->exprs);
+               }
+       }
+       if(unconvinient_ors != NIL)
+               or_list = lappend(or_list, list_length(unconvinient_ors) > 1 ? 
makeBoolExpr(OR_EXPR, unconvinient_ors, location) : linitial(unconvinient_ors));
+       hash_destroy(or_group_htab);
+       list_free(groups);
+
+       /* One more trick: assemble correct clause */
+       return (Node *) ((list_length(or_list) > 1) ?
+                                        makeBoolExpr(OR_EXPR, or_list, 
location) :
+                                        linitial(or_list));
+}
 
 /*
  * transformExpr -
@@ -1432,6 +1847,11 @@ transformBoolExpr(ParseState *pstate, BoolExpr *a)
                args = lappend(args, arg);
        }
 
+       /* Make an attempt to group similar OR clauses into ANY operation */
+       if (enable_or_transformation && a->boolop == OR_EXPR &&
+               list_length(args) >0)
+               return TransformOrExprToANY(pstate, args, a->location);
+
        return (Node *) makeBoolExpr(a->boolop, args, a->location);
 }
 
diff --git a/src/backend/utils/misc/guc_tables.c 
b/src/backend/utils/misc/guc_tables.c
index 46c258be282..f5da097fcdf 100644
--- a/src/backend/utils/misc/guc_tables.c
+++ b/src/backend/utils/misc/guc_tables.c
@@ -1007,6 +1007,17 @@ struct config_bool ConfigureNamesBool[] =
                true,
                NULL, NULL, NULL
        },
+       {
+               {"enable_or_transformation", PGC_USERSET, QUERY_TUNING_OTHER,
+                       gettext_noop("Transform a sequence of OR clauses to an 
array expression."),
+                       gettext_noop("The planner will replace expression like 
'x=c1 OR x=c2 ..'"
+                                                "to the expression 'x = 
ANY(ARRAY[c1,c2,..])'"),
+                       GUC_EXPLAIN
+               },
+               &enable_or_transformation,
+               true,
+               NULL, NULL, NULL
+       },
        {
                /*
                 * Not for general use --- used by SET SESSION AUTHORIZATION 
and SET
diff --git a/src/include/nodes/queryjumble.h b/src/include/nodes/queryjumble.h
index f1c55c8067f..a9ae048af52 100644
--- a/src/include/nodes/queryjumble.h
+++ b/src/include/nodes/queryjumble.h
@@ -65,6 +65,7 @@ extern PGDLLIMPORT int compute_query_id;
 
 extern const char *CleanQuerytext(const char *query, int *location, int *len);
 extern JumbleState *JumbleQuery(Query *query);
+extern JumbleState *JumbleExpr(Expr *expr, uint64 *queryId);
 extern void EnableQueryId(void);
 
 extern PGDLLIMPORT bool query_id_enabled;
diff --git a/src/include/optimizer/optimizer.h 
b/src/include/optimizer/optimizer.h
index 7b63c5cf718..35ab5775019 100644
--- a/src/include/optimizer/optimizer.h
+++ b/src/include/optimizer/optimizer.h
@@ -50,6 +50,7 @@ struct PlannedStmt;
 struct ParamListInfoData;
 struct HeapTupleData;
 
+extern PGDLLIMPORT bool enable_or_transformation;
 
 /* in path/clausesel.c: */
 
diff --git a/src/test/regress/expected/join.out 
b/src/test/regress/expected/join.out
index 6b16c3a6769..ccf280001a0 100644
--- a/src/test/regress/expected/join.out
+++ b/src/test/regress/expected/join.out
@@ -4210,10 +4210,10 @@ explain (costs off)
 select * from tenk1 a join tenk1 b on
   (a.unique1 = 1 and b.unique1 = 2) or
   ((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
-                                                      QUERY PLAN               
                                       
-----------------------------------------------------------------------------------------------------------------------
+                                                       QUERY PLAN              
                                         
+------------------------------------------------------------------------------------------------------------------------
  Nested Loop
-   Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR (((a.unique2 = 3) OR 
(a.unique2 = 7)) AND (b.hundred = 4)))
+   Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR ((a.unique2 = ANY 
('{3,7}'::integer[])) AND (b.hundred = 4)))
    ->  Bitmap Heap Scan on tenk1 b
          Recheck Cond: ((unique1 = 2) OR (hundred = 4))
          ->  BitmapOr
@@ -4223,16 +4223,64 @@ select * from tenk1 a join tenk1 b on
                      Index Cond: (hundred = 4)
    ->  Materialize
          ->  Bitmap Heap Scan on tenk1 a
-               Recheck Cond: ((unique1 = 1) OR (unique2 = 3) OR (unique2 = 7))
+               Recheck Cond: ((unique1 = 1) OR (unique2 = ANY 
('{3,7}'::integer[])))
                ->  BitmapOr
                      ->  Bitmap Index Scan on tenk1_unique1
                            Index Cond: (unique1 = 1)
                      ->  Bitmap Index Scan on tenk1_unique2
-                           Index Cond: (unique2 = 3)
+                           Index Cond: (unique2 = ANY ('{3,7}'::integer[]))
+(17 rows)
+
+SET enable_or_transformation = on;
+explain (costs off)
+select * from tenk1 a join tenk1 b on
+  (a.unique1 = 1 and b.unique1 = 2) or
+  ((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
+                                                       QUERY PLAN              
                                         
+------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+   Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR ((a.unique2 = ANY 
('{3,7}'::integer[])) AND (b.hundred = 4)))
+   ->  Bitmap Heap Scan on tenk1 b
+         Recheck Cond: ((unique1 = 2) OR (hundred = 4))
+         ->  BitmapOr
+               ->  Bitmap Index Scan on tenk1_unique1
+                     Index Cond: (unique1 = 2)
+               ->  Bitmap Index Scan on tenk1_hundred
+                     Index Cond: (hundred = 4)
+   ->  Materialize
+         ->  Bitmap Heap Scan on tenk1 a
+               Recheck Cond: ((unique1 = 1) OR (unique2 = ANY 
('{3,7}'::integer[])))
+               ->  BitmapOr
+                     ->  Bitmap Index Scan on tenk1_unique1
+                           Index Cond: (unique1 = 1)
                      ->  Bitmap Index Scan on tenk1_unique2
-                           Index Cond: (unique2 = 7)
-(19 rows)
+                           Index Cond: (unique2 = ANY ('{3,7}'::integer[]))
+(17 rows)
+
+explain (costs off)
+select * from tenk1 a join tenk1 b on
+  (a.unique1 < 20 or a.unique1 = 3 or a.unique1 = 1 and b.unique1 = 2) or
+  ((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
+                                                                          
QUERY PLAN                                                                      
     
+---------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+   Join Filter: ((a.unique1 < 20) OR (a.unique1 = 3) OR ((a.unique1 = 1) AND 
(b.unique1 = 2)) OR ((a.unique2 = ANY ('{3,7}'::integer[])) AND (b.hundred = 
4)))
+   ->  Seq Scan on tenk1 b
+   ->  Materialize
+         ->  Bitmap Heap Scan on tenk1 a
+               Recheck Cond: ((unique1 < 20) OR (unique1 = 3) OR (unique1 = 1) 
OR (unique2 = ANY ('{3,7}'::integer[])))
+               ->  BitmapOr
+                     ->  Bitmap Index Scan on tenk1_unique1
+                           Index Cond: (unique1 < 20)
+                     ->  Bitmap Index Scan on tenk1_unique1
+                           Index Cond: (unique1 = 3)
+                     ->  Bitmap Index Scan on tenk1_unique1
+                           Index Cond: (unique1 = 1)
+                     ->  Bitmap Index Scan on tenk1_unique2
+                           Index Cond: (unique2 = ANY ('{3,7}'::integer[]))
+(15 rows)
 
+RESET enable_or_transformation;
 --
 -- test placement of movable quals in a parameterized join tree
 --
diff --git a/src/test/regress/expected/partition_prune.out 
b/src/test/regress/expected/partition_prune.out
index 7ca98397aec..9c2a4d75619 100644
--- a/src/test/regress/expected/partition_prune.out
+++ b/src/test/regress/expected/partition_prune.out
@@ -82,25 +82,47 @@ explain (costs off) select * from lp where a is null;
 (2 rows)
 
 explain (costs off) select * from lp where a = 'a' or a = 'c';
-                        QUERY PLAN                        
-----------------------------------------------------------
+                  QUERY PLAN                   
+-----------------------------------------------
  Append
    ->  Seq Scan on lp_ad lp_1
-         Filter: ((a = 'a'::bpchar) OR (a = 'c'::bpchar))
+         Filter: (a = ANY ('{a,c}'::bpchar[]))
    ->  Seq Scan on lp_bc lp_2
-         Filter: ((a = 'a'::bpchar) OR (a = 'c'::bpchar))
+         Filter: (a = ANY ('{a,c}'::bpchar[]))
 (5 rows)
 
 explain (costs off) select * from lp where a is not null and (a = 'a' or a = 
'c');
-                                   QUERY PLAN                                  
 
---------------------------------------------------------------------------------
+                             QUERY PLAN                              
+---------------------------------------------------------------------
  Append
    ->  Seq Scan on lp_ad lp_1
-         Filter: ((a IS NOT NULL) AND ((a = 'a'::bpchar) OR (a = 'c'::bpchar)))
+         Filter: ((a IS NOT NULL) AND (a = ANY ('{a,c}'::bpchar[])))
    ->  Seq Scan on lp_bc lp_2
-         Filter: ((a IS NOT NULL) AND ((a = 'a'::bpchar) OR (a = 'c'::bpchar)))
+         Filter: ((a IS NOT NULL) AND (a = ANY ('{a,c}'::bpchar[])))
 (5 rows)
 
+SET enable_or_transformation = on;
+explain (costs off) select * from lp where a = 'a' or a = 'c';
+                  QUERY PLAN                   
+-----------------------------------------------
+ Append
+   ->  Seq Scan on lp_ad lp_1
+         Filter: (a = ANY ('{a,c}'::bpchar[]))
+   ->  Seq Scan on lp_bc lp_2
+         Filter: (a = ANY ('{a,c}'::bpchar[]))
+(5 rows)
+
+explain (costs off) select * from lp where a is not null and (a = 'a' or a = 
'c');
+                             QUERY PLAN                              
+---------------------------------------------------------------------
+ Append
+   ->  Seq Scan on lp_ad lp_1
+         Filter: ((a IS NOT NULL) AND (a = ANY ('{a,c}'::bpchar[])))
+   ->  Seq Scan on lp_bc lp_2
+         Filter: ((a IS NOT NULL) AND (a = ANY ('{a,c}'::bpchar[])))
+(5 rows)
+
+RESET enable_or_transformation;
 explain (costs off) select * from lp where a <> 'g';
              QUERY PLAN             
 ------------------------------------
@@ -515,10 +537,10 @@ explain (costs off) select * from rlp where a <= 31;
 (27 rows)
 
 explain (costs off) select * from rlp where a = 1 or a = 7;
-           QUERY PLAN           
---------------------------------
+                QUERY PLAN                
+------------------------------------------
  Seq Scan on rlp2 rlp
-   Filter: ((a = 1) OR (a = 7))
+   Filter: (a = ANY ('{1,7}'::integer[]))
 (2 rows)
 
 explain (costs off) select * from rlp where a = 1 or b = 'ab';
@@ -596,13 +618,13 @@ explain (costs off) select * from rlp where a < 1 or (a > 
20 and a < 25);
 
 -- where clause contradicts sub-partition's constraint
 explain (costs off) select * from rlp where a = 20 or a = 40;
-               QUERY PLAN               
-----------------------------------------
+                    QUERY PLAN                    
+--------------------------------------------------
  Append
    ->  Seq Scan on rlp4_1 rlp_1
-         Filter: ((a = 20) OR (a = 40))
+         Filter: (a = ANY ('{20,40}'::integer[]))
    ->  Seq Scan on rlp5_default rlp_2
-         Filter: ((a = 20) OR (a = 40))
+         Filter: (a = ANY ('{20,40}'::integer[]))
 (5 rows)
 
 explain (costs off) select * from rlp3 where a = 20;   /* empty */
@@ -671,6 +693,163 @@ explain (costs off) select * from rlp where (a = 1 and a 
= 3) or (a > 1 and a =
          Filter: (((a = 1) AND (a = 3)) OR ((a > 1) AND (a = 15)))
 (11 rows)
 
+SET enable_or_transformation = on;
+explain (costs off) select * from rlp where a = 1 or a = 7;
+                QUERY PLAN                
+------------------------------------------
+ Seq Scan on rlp2 rlp
+   Filter: (a = ANY ('{1,7}'::integer[]))
+(2 rows)
+
+explain (costs off) select * from rlp where a = 1 or b = 'ab';
+                      QUERY PLAN                       
+-------------------------------------------------------
+ Append
+   ->  Seq Scan on rlp1 rlp_1
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp2 rlp_2
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp3abcd rlp_3
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp4_1 rlp_4
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp4_2 rlp_5
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp4_default rlp_6
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp5_1 rlp_7
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp5_default rlp_8
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp_default_10 rlp_9
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp_default_30 rlp_10
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp_default_null rlp_11
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+   ->  Seq Scan on rlp_default_default rlp_12
+         Filter: ((a = 1) OR ((b)::text = 'ab'::text))
+(25 rows)
+
+explain (costs off) select * from rlp where a > 20 and a < 27;
+               QUERY PLAN                
+-----------------------------------------
+ Append
+   ->  Seq Scan on rlp4_1 rlp_1
+         Filter: ((a > 20) AND (a < 27))
+   ->  Seq Scan on rlp4_2 rlp_2
+         Filter: ((a > 20) AND (a < 27))
+(5 rows)
+
+explain (costs off) select * from rlp where a = 29;
+          QUERY PLAN          
+------------------------------
+ Seq Scan on rlp4_default rlp
+   Filter: (a = 29)
+(2 rows)
+
+explain (costs off) select * from rlp where a >= 29;
+                 QUERY PLAN                  
+---------------------------------------------
+ Append
+   ->  Seq Scan on rlp4_default rlp_1
+         Filter: (a >= 29)
+   ->  Seq Scan on rlp5_1 rlp_2
+         Filter: (a >= 29)
+   ->  Seq Scan on rlp5_default rlp_3
+         Filter: (a >= 29)
+   ->  Seq Scan on rlp_default_30 rlp_4
+         Filter: (a >= 29)
+   ->  Seq Scan on rlp_default_default rlp_5
+         Filter: (a >= 29)
+(11 rows)
+
+explain (costs off) select * from rlp where a < 1 or (a > 20 and a < 25);
+                      QUERY PLAN                      
+------------------------------------------------------
+ Append
+   ->  Seq Scan on rlp1 rlp_1
+         Filter: ((a < 1) OR ((a > 20) AND (a < 25)))
+   ->  Seq Scan on rlp4_1 rlp_2
+         Filter: ((a < 1) OR ((a > 20) AND (a < 25)))
+(5 rows)
+
+explain (costs off) select * from rlp where a = 20 or a = 40;
+                    QUERY PLAN                    
+--------------------------------------------------
+ Append
+   ->  Seq Scan on rlp4_1 rlp_1
+         Filter: (a = ANY ('{20,40}'::integer[]))
+   ->  Seq Scan on rlp5_default rlp_2
+         Filter: (a = ANY ('{20,40}'::integer[]))
+(5 rows)
+
+explain (costs off) select * from rlp3 where a = 20;   /* empty */
+        QUERY PLAN        
+--------------------------
+ Result
+   One-Time Filter: false
+(2 rows)
+
+explain (costs off) select * from rlp where a > 1 and a = 10;  /* only default 
*/
+            QUERY PLAN            
+----------------------------------
+ Seq Scan on rlp_default_10 rlp
+   Filter: ((a > 1) AND (a = 10))
+(2 rows)
+
+explain (costs off) select * from rlp where a > 1 and a >=15;  /* rlp3 
onwards, including default */
+                  QUERY PLAN                  
+----------------------------------------------
+ Append
+   ->  Seq Scan on rlp3abcd rlp_1
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp3efgh rlp_2
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp3nullxy rlp_3
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp3_default rlp_4
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp4_1 rlp_5
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp4_2 rlp_6
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp4_default rlp_7
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp5_1 rlp_8
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp5_default rlp_9
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp_default_30 rlp_10
+         Filter: ((a > 1) AND (a >= 15))
+   ->  Seq Scan on rlp_default_default rlp_11
+         Filter: ((a > 1) AND (a >= 15))
+(23 rows)
+
+explain (costs off) select * from rlp where a = 1 and a = 3;   /* empty */
+        QUERY PLAN        
+--------------------------
+ Result
+   One-Time Filter: false
+(2 rows)
+
+explain (costs off) select * from rlp where (a = 1 and a = 3) or (a > 1 and a 
= 15);
+                            QUERY PLAN                             
+-------------------------------------------------------------------
+ Append
+   ->  Seq Scan on rlp2 rlp_1
+         Filter: (((a = 1) AND (a = 3)) OR ((a > 1) AND (a = 15)))
+   ->  Seq Scan on rlp3abcd rlp_2
+         Filter: (((a = 1) AND (a = 3)) OR ((a > 1) AND (a = 15)))
+   ->  Seq Scan on rlp3efgh rlp_3
+         Filter: (((a = 1) AND (a = 3)) OR ((a > 1) AND (a = 15)))
+   ->  Seq Scan on rlp3nullxy rlp_4
+         Filter: (((a = 1) AND (a = 3)) OR ((a > 1) AND (a = 15)))
+   ->  Seq Scan on rlp3_default rlp_5
+         Filter: (((a = 1) AND (a = 3)) OR ((a > 1) AND (a = 15)))
+(11 rows)
+
+RESET enable_or_transformation;
 -- multi-column keys
 create table mc3p (a int, b int, c int) partition by range (a, abs(b), c);
 create table mc3p_default partition of mc3p default;
@@ -2072,10 +2251,10 @@ explain (costs off) select * from hp where a = 1 and b 
= 'abcde';
 
 explain (costs off) select * from hp where a = 1 and b = 'abcde' and
   (c = 2 or c = 3);
-                              QUERY PLAN                              
-----------------------------------------------------------------------
+                                   QUERY PLAN                                  
 
+--------------------------------------------------------------------------------
  Seq Scan on hp2 hp
-   Filter: ((a = 1) AND (b = 'abcde'::text) AND ((c = 2) OR (c = 3)))
+   Filter: ((c = ANY ('{2,3}'::integer[])) AND (a = 1) AND (b = 'abcde'::text))
 (2 rows)
 
 drop table hp2;
diff --git a/src/test/regress/expected/stats_ext.out 
b/src/test/regress/expected/stats_ext.out
index 8c4da955084..7678744181c 100644
--- a/src/test/regress/expected/stats_ext.out
+++ b/src/test/regress/expected/stats_ext.out
@@ -1322,19 +1322,19 @@ SELECT * FROM check_estimated_rows('SELECT * FROM 
functional_dependencies WHERE
 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies 
WHERE (a = 1 OR a = 51) AND b = ''1''');
  estimated | actual 
 -----------+--------
-        99 |    100
+       100 |    100
 (1 row)
 
 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies 
WHERE (a = 1 OR a = 51) AND (b = ''1'' OR b = ''2'')');
  estimated | actual 
 -----------+--------
-        99 |    100
+       100 |    100
 (1 row)
 
 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies 
WHERE (a = 1 OR a = 2 OR a = 51 OR a = 52) AND (b = ''1'' OR b = ''2'')');
  estimated | actual 
 -----------+--------
-       197 |    200
+       200 |    200
 (1 row)
 
 -- OR clauses referencing different attributes are incompatible
@@ -1664,19 +1664,19 @@ SELECT * FROM check_estimated_rows('SELECT * FROM 
functional_dependencies WHERE
 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies 
WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = ''1''');
  estimated | actual 
 -----------+--------
-        99 |    100
+       100 |    100
 (1 row)
 
 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies 
WHERE ((a * 2) = 2 OR (a * 2) = 102) AND (upper(b) = ''1'' OR upper(b) = 
''2'')');
  estimated | actual 
 -----------+--------
-        99 |    100
+       100 |    100
 (1 row)
 
 SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies 
WHERE ((a * 2) = 2 OR (a * 2) = 4 OR (a * 2) = 102 OR (a * 2) = 104) AND 
(upper(b) = ''1'' OR upper(b) = ''2'')');
  estimated | actual 
 -----------+--------
-       197 |    200
+       200 |    200
 (1 row)
 
 -- OR clauses referencing different attributes
diff --git a/src/test/regress/expected/sysviews.out 
b/src/test/regress/expected/sysviews.out
index dbfd0c13d46..6123351a9a8 100644
--- a/src/test/regress/expected/sysviews.out
+++ b/src/test/regress/expected/sysviews.out
@@ -147,6 +147,7 @@ select name, setting from pg_settings where name like 
'enable%';
  enable_memoize                 | on
  enable_mergejoin               | on
  enable_nestloop                | on
+ enable_or_transformation       | on
  enable_parallel_append         | on
  enable_parallel_hash           | on
  enable_partition_pruning       | on
diff --git a/src/test/regress/sql/create_index.sql 
b/src/test/regress/sql/create_index.sql
index e296891cab8..057c6d2bda1 100644
--- a/src/test/regress/sql/create_index.sql
+++ b/src/test/regress/sql/create_index.sql
@@ -738,6 +738,41 @@ SELECT count(*) FROM tenk1
 SELECT count(*) FROM tenk1
   WHERE hundred = 42 AND (thousand = 42 OR thousand = 99);
 
+SET enable_or_transformation = on;
+EXPLAIN (COSTS OFF)
+SELECT * FROM tenk1
+  WHERE thousand = 42 AND (tenthous = 1 OR tenthous = 3 OR tenthous = 42);
+SELECT * FROM tenk1
+  WHERE thousand = 42 AND (tenthous = 1 OR tenthous = 3 OR tenthous = 42);
+
+EXPLAIN (COSTS OFF)
+SELECT count(*) FROM tenk1
+  WHERE hundred = 42 AND (thousand = 42 OR thousand = 99);
+SELECT count(*) FROM tenk1
+  WHERE hundred = 42 AND (thousand = 42 OR thousand = 99);
+EXPLAIN (COSTS OFF)
+SELECT count(*) FROM tenk1
+  WHERE hundred = 42 AND (thousand < 42 OR thousand < 99 OR 43 > thousand OR 
42 > thousand);
+
+EXPLAIN (COSTS OFF)
+SELECT count(*) FROM tenk1
+  WHERE thousand = 42 AND (tenthous = 1 OR tenthous = 3) OR thousand = 41;
+SELECT count(*) FROM tenk1
+  WHERE thousand = 42 AND (tenthous = 1 OR tenthous = 3) OR thousand = 41;
+
+EXPLAIN (COSTS OFF)
+SELECT count(*) FROM tenk1
+  WHERE hundred = 42 AND (thousand = 42 OR thousand = 99 OR tenthous < 2) OR 
thousand = 41;
+SELECT count(*) FROM tenk1
+  WHERE hundred = 42 AND (thousand = 42 OR thousand = 99 OR tenthous < 2) OR 
thousand = 41;
+
+EXPLAIN (COSTS OFF)
+SELECT count(*) FROM tenk1
+  WHERE hundred = 42 AND (thousand = 42 OR thousand = 41 OR thousand = 99 AND 
tenthous = 2);
+SELECT count(*) FROM tenk1
+  WHERE hundred = 42 AND (thousand = 42 OR thousand = 41 OR thousand = 99 AND 
tenthous = 2);
+RESET enable_or_transformation;
+
 --
 -- Check behavior with duplicate index column contents
 --
diff --git a/src/test/regress/sql/join.sql b/src/test/regress/sql/join.sql
index 8bfe3b7ba67..c77b5c50f01 100644
--- a/src/test/regress/sql/join.sql
+++ b/src/test/regress/sql/join.sql
@@ -1408,6 +1408,16 @@ explain (costs off)
 select * from tenk1 a join tenk1 b on
   (a.unique1 = 1 and b.unique1 = 2) or
   ((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
+SET enable_or_transformation = on;
+explain (costs off)
+select * from tenk1 a join tenk1 b on
+  (a.unique1 = 1 and b.unique1 = 2) or
+  ((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
+explain (costs off)
+select * from tenk1 a join tenk1 b on
+  (a.unique1 < 20 or a.unique1 = 3 or a.unique1 = 1 and b.unique1 = 2) or
+  ((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
+RESET enable_or_transformation;
 
 --
 -- test placement of movable quals in a parameterized join tree
diff --git a/src/test/regress/sql/partition_prune.sql 
b/src/test/regress/sql/partition_prune.sql
index a09b27d820c..9717c8c835c 100644
--- a/src/test/regress/sql/partition_prune.sql
+++ b/src/test/regress/sql/partition_prune.sql
@@ -21,6 +21,12 @@ explain (costs off) select * from lp where a is not null;
 explain (costs off) select * from lp where a is null;
 explain (costs off) select * from lp where a = 'a' or a = 'c';
 explain (costs off) select * from lp where a is not null and (a = 'a' or a = 
'c');
+
+SET enable_or_transformation = on;
+explain (costs off) select * from lp where a = 'a' or a = 'c';
+explain (costs off) select * from lp where a is not null and (a = 'a' or a = 
'c');
+RESET enable_or_transformation;
+
 explain (costs off) select * from lp where a <> 'g';
 explain (costs off) select * from lp where a <> 'a' and a <> 'd';
 explain (costs off) select * from lp where a not in ('a', 'd');
@@ -99,6 +105,22 @@ explain (costs off) select * from rlp where a > 1 and a 
>=15;       /* rlp3 onwards, i
 explain (costs off) select * from rlp where a = 1 and a = 3;   /* empty */
 explain (costs off) select * from rlp where (a = 1 and a = 3) or (a > 1 and a 
= 15);
 
+
+SET enable_or_transformation = on;
+explain (costs off) select * from rlp where a = 1 or a = 7;
+explain (costs off) select * from rlp where a = 1 or b = 'ab';
+explain (costs off) select * from rlp where a > 20 and a < 27;
+explain (costs off) select * from rlp where a = 29;
+explain (costs off) select * from rlp where a >= 29;
+explain (costs off) select * from rlp where a < 1 or (a > 20 and a < 25);
+explain (costs off) select * from rlp where a = 20 or a = 40;
+explain (costs off) select * from rlp3 where a = 20;   /* empty */
+explain (costs off) select * from rlp where a > 1 and a = 10;  /* only default 
*/
+explain (costs off) select * from rlp where a > 1 and a >=15;  /* rlp3 
onwards, including default */
+explain (costs off) select * from rlp where a = 1 and a = 3;   /* empty */
+explain (costs off) select * from rlp where (a = 1 and a = 3) or (a > 1 and a 
= 15);
+RESET enable_or_transformation;
+
 -- multi-column keys
 create table mc3p (a int, b int, c int) partition by range (a, abs(b), c);
 create table mc3p_default partition of mc3p default;
diff --git a/src/test/regress/sql/tidscan.sql b/src/test/regress/sql/tidscan.sql
index 313e0fb9b67..0499bedb9eb 100644
--- a/src/test/regress/sql/tidscan.sql
+++ b/src/test/regress/sql/tidscan.sql
@@ -22,6 +22,12 @@ EXPLAIN (COSTS OFF)
 SELECT ctid, * FROM tidscan WHERE ctid = '(0,2)' OR '(0,1)' = ctid;
 SELECT ctid, * FROM tidscan WHERE ctid = '(0,2)' OR '(0,1)' = ctid;
 
+SET enable_or_transformation = on;
+EXPLAIN (COSTS OFF)
+SELECT ctid, * FROM tidscan WHERE ctid = '(0,2)' OR '(0,1)' = ctid;
+SELECT ctid, * FROM tidscan WHERE ctid = '(0,2)' OR '(0,1)' = ctid;
+RESET enable_or_transformation;
+
 -- ctid = ScalarArrayOp - implemented as tidscan
 EXPLAIN (COSTS OFF)
 SELECT ctid, * FROM tidscan WHERE ctid = ANY(ARRAY['(0,1)', '(0,2)']::tid[]);
diff --git a/src/tools/pgindent/typedefs.list b/src/tools/pgindent/typedefs.list
index 61ad417cde6..94450939331 100644
--- a/src/tools/pgindent/typedefs.list
+++ b/src/tools/pgindent/typedefs.list
@@ -1714,6 +1714,8 @@ NumericVar
 OM_uint32
 OP
 OSAPerGroupState
+OrClauseGroupEntry
+OrClauseGroupKey
 OSAPerQueryState
 OSInfo
 OSSLCipher

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