Change the generate_series() table-valued function so that its rowid is just an

alias for its value.  This allows it to be used as the RHS operand of a
RIGHT JOIN.  This fixes the issue raised by
[forum:/forumpost/1e17219c88|forum post 1e17219c88].

FossilOrigin-Name: 77db4d85e70fbf358ae2321c2601966666bdb4d971d7c113ce30a3e541458ee8

ext/misc/series.c

@@ -60,8 +60,7 @@
 **       step HIDDEN
 **     );
 **
-** The virtual table also has a rowid, logically equivalent to n+1 where
-** "n" is the ascending integer in the aforesaid production definition.
+** The virtual table also has a rowid which is an alias for the value.
 **
 ** Function arguments in queries against this virtual table are translated
 ** into equality constraints against successive hidden columns.  In other
@@ -276,6 +275,7 @@ static int seriesConnect(
   int rc;
 
 /* Column numbers */
+#define SERIES_COLUMN_ROWID (-1)
 #define SERIES_COLUMN_VALUE 0
 #define SERIES_COLUMN_START 1
 #define SERIES_COLUMN_STOP  2
@@ -363,13 +363,11 @@ static int seriesColumn(
 #endif
 
 /*
-** Return the rowid for the current row, logically equivalent to n+1 where
-** "n" is the ascending integer in the aforesaid production definition.
+** The rowid is the same as the value.
 */
 static int seriesRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){
   series_cursor *pCur = (series_cursor*)cur;
-  sqlite3_uint64 n = pCur->ss.uSeqIndexNow;
-  *pRowid = (sqlite3_int64)((n<LARGEST_UINT64)? n+1 : 0);
+  *pRowid = pCur->ss.iValueNow;
   return SQLITE_OK;
 }
 
@@ -657,7 +655,10 @@ static int seriesBestIndex(
       continue;
     }
     if( pConstraint->iColumn<SERIES_COLUMN_START ){
-      if( pConstraint->iColumn==SERIES_COLUMN_VALUE && pConstraint->usable ){
+      if( (pConstraint->iColumn==SERIES_COLUMN_VALUE ||
+           pConstraint->iColumn==SERIES_COLUMN_ROWID)
+       && pConstraint->usable
+      ){
         switch( op ){
           case SQLITE_INDEX_CONSTRAINT_EQ:
           case SQLITE_INDEX_CONSTRAINT_IS: {

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\sproblem\sthat\scould\soccur\swhen\sthe\sRHS\sof\san\sIN\soperator\swas\sa\scompound\sSELECT\sfeaturing\san\sORDER\sBY\son\sa\ssubquery\sthat\swas\sflattened\sinto\sone\sof\sthe\scomponent\sSELECTs\sintroduced\sby\s[baa83b460c677c21].\sForum\spost\s[/forumpost/1e17219c88].
-D 2025-03-18T19:21:04.551
+C Change\sthe\sgenerate_series()\stable-valued\sfunction\sso\sthat\sits\srowid\sis\sjust\san\nalias\sfor\sits\svalue.\s\sThis\sallows\sit\sto\sbe\sused\sas\sthe\sRHS\soperand\sof\sa\nRIGHT\sJOIN.\s\sThis\sfixes\sthe\sissue\sraised\sby\n[forum:/forumpost/1e17219c88|forum\spost\s1e17219c88].
+D 2025-03-18T20:15:16.250
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md e108e1e69ae8e8a59e93c455654b8ac9356a11720d3345df2a4743e9590fb20d
@@ -436,7 +436,7 @@ F ext/misc/regexp.c 388e7f237307c7dfbfb8dde44e097946f6c437801d63f0d7ad63f3320d4e
 F ext/misc/remember.c add730f0f7e7436cd15ea3fd6a90fd83c3f706ab44169f7f048438b7d6baa69c
 F ext/misc/rot13.c 51ac5f51e9d5fd811db58a9c23c628ad5f333c173f1fc53c8491a3603d38556c
 F ext/misc/scrub.c 2a44b0d44c69584c0580ad2553f6290a307a49df4668941d2812135bfb96a946
-F ext/misc/series.c 69e0d2b5d193c67bdfee5baf79c10ec24a61a40212c7ca9c219edf7afa24305f
+F ext/misc/series.c 076a4c85dde2ae543d040f1080cdab74ebf3da7f3febfe38e0cd45a2217498bf
 F ext/misc/sha1.c cb5002148c2661b5946f34561701e9105e9d339b713ec8ac057fd888b196dcb9
 F ext/misc/shathree.c fd22d70620f86a0467acfdd3acd8435d5cb54eb1e2d9ff36ae44e389826993df
 F ext/misc/showauth.c 732578f0fe4ce42d577e1c86dc89dd14a006ab52
@@ -1641,7 +1641,7 @@ F test/sharedB.test 1a84863d7a2204e0d42f2e1606577c5e92e4473fa37ea0f5bdf829e4bf8e
 F test/shared_err.test 32634e404a3317eeb94abc7a099c556a346fdb8fb3858dbe222a4cbb8926a939
 F test/sharedlock.test 5ede3c37439067c43b0198f580fd374ebf15d304
 F test/shell1.test 573942b8d0e444956445993d5a5275c6912bc49b654441eec0b5e1e735f2e5b7
-F test/shell2.test 01a01f76ed98088ce598794fbf5b359e148271541a8ddbf79d21cc353cc67a24
+F test/shell2.test ac102ebc0a9ec166257600c4ee8bdefec242163afced295f10b004f4af3fc9dd
 F test/shell3.test db1953a8e59d08e9240b7cc5948878e184f7eb2623591587f8fd1f1a5bd536d8
 F test/shell4.test 522fdc628c55eff697b061504fb0a9e4e6dfc5d9087a633ab0f3dd11bcc4f807
 F test/shell5.test 0e5f8ce08206b9998a778cfe1989e20e47839153c05af2da29198150172e22fc
@@ -1719,7 +1719,7 @@ F test/sync.test 89539f4973c010eda5638407e71ca7fddbcd8e0594f4c9980229f804d433309
 F test/sync2.test 8f9f7d4f6d5be8ca8941a8dadcc4299e558cb6a1ff653a9469146c7a76ef2039
 F test/syscall.test a067468b43b8cb2305e9f9fe414e5f40c875bb5d2cba5f00b8154396e95fcf37
 F test/sysfault.test c9f2b0d8d677558f74de750c75e12a5454719d04
-F test/tabfunc01.test 66d1ea27289c19317bf111744a4d5fda901759945d22ddb5bc964641fc38c185
+F test/tabfunc01.test 76da0509b01b9d12f4e71f8af28ee702d38166a5306bd77a955fb1a370dcd8b5
 F test/table.test 7862a00b58b5541511a26757ea9c5c7c3f8298766e98aa099deec703d9c0a8e0
 F test/tableapi.test e37c33e6be2276e3a96bb54b00eea7f321277115d10e5b30fdb52a112b432750
 F test/tableopts.test dba698ba97251017b7c80d738c198d39ab747930
@@ -2215,8 +2215,8 @@ F tool/version-info.c 3b36468a90faf1bbd59c65fd0eb66522d9f941eedd364fabccd7227350
 F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee87c1b31a7
 F tool/warnings.sh 49a486c5069de041aedcbde4de178293e0463ae9918ecad7539eedf0ec77a139
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 47d34260e74912eeae704bff7c4314b893af86ee66dd96a1bc6f450d3e290702
-R 4ad094e1728498f359eaedd7a6999953
-U dan
-Z 7c0745034fb8db0f32cdbdfb739169c4
+P 7101ccd5331e36fd1a539f540e79ce0ce159be76ec422e1d9436eec6f3908c6e
+R db7ca198487b77ea1364073bfe0ca044
+U drh
+Z c0d28f545eced4435e36308f7af9950b
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-7101ccd5331e36fd1a539f540e79ce0ce159be76ec422e1d9436eec6f3908c6e
+77db4d85e70fbf358ae2321c2601966666bdb4d971d7c113ce30a3e541458ee8

test/shell2.test

@@ -224,24 +224,24 @@ do_test shell2-1.4.10 {
  set res [catchcmd :memory: [string trim {
  SELECT * FROM generate_series(9223372036854775807,9223372036854775807,1);
  SELECT * FROM generate_series(9223372036854775807,9223372036854775807,-1);
- SELECT avg(rowid),min(value),max(value) FROM generate_series(
+ SELECT avg(value),min(value),max(value) FROM generate_series(
   -9223372036854775808,9223372036854775807,1085102592571150095);
  SELECT * FROM generate_series(-9223372036854775808,9223372036854775807,
   9223372036854775807);
- SELECT value,rowid FROM generate_series(-4611686018427387904,
+ SELECT value FROM generate_series(-4611686018427387904,
   4611686018427387904, 4611686018427387904) ORDER BY value DESC;
  SELECT * FROM generate_series(0,-2,-1);
  SELECT * FROM generate_series(0,-2);
  SELECT * FROM generate_series(0,2) LIMIT 3;}]]
 } {0 {9223372036854775807
 9223372036854775807
-9.5|-9223372036854775808|9223372036854775807
+-0.5|-9223372036854775808|9223372036854775807
 -9223372036854775808
 -1
 9223372036854775806
-4611686018427387904|3
-0|2
--4611686018427387904|1
+4611686018427387904
+0
+-4611686018427387904
 0
 -1
 -2

test/tabfunc01.test

@@ -61,10 +61,10 @@ do_execsql_test tabfunc01-1.8 {
 } {30 25 20 15 10 5 0}
 do_execsql_test tabfunc01-1.9 {
   SELECT rowid, * FROM generate_series(0,32,5) ORDER BY value DESC;
-} {7 30 6 25 5 20 4 15 3 10 2 5 1 0}
+} {30 30 25 25 20 20 15 15 10 10 5 5 0 0}
 do_execsql_test tabfunc01-1.10 {
   SELECT rowid, * FROM generate_series(0,32,5) ORDER BY +value DESC;
-} {7 30 6 25 5 20 4 15 3 10 2 5 1 0}
+} {30 30 25 25 20 20 15 15 10 10 5 5 0 0}
 
 do_execsql_test tabfunc01-1.20 {
   CREATE VIEW v1(a,b) AS VALUES(1,2),(3,4);
@@ -383,7 +383,18 @@ do_execsql_test 1100 {
     where (ref_3.value) in (select 1);
 } {1}
 
-
+# 2025-03-18 /forumpost/1e17219c88
+# The generate_series() table-valued function is modified so that its
+# rowid is always its value. That way it can be used on the RHS of a
+# RIGHT JOIN.
+#
+do_execsql_test 1200 {
+  DROP TABLE IF EXISTS t1;
+  CREATE TABLE t1(value INT);
+  INSERT INTO t1 VALUES (1),(2),(3);
+  SELECT t1.value, t2.value
+    FROM t1 RIGHT JOIN generate_series(1,3,1) AS t2 USING(value);
+} {1 1 2 2 3 3}
 
 # Free up memory allocations
 intarray_addr