Do not optimize views with an ORDER BY clause if they are used in a UNION ALL

that also has an ORDER BY clause.  Ticket #1444. (CVS 2723)

FossilOrigin-Name: 6cc57fcf15cfa3ce73c78b1cac90f7806e5bae40

manifest

@@ -1,5 +1,5 @@
-C Fix\suninitialized\svalue\son\sa\sUNION\sALL\sselect\swith\san\sORDER\sBY\sclause.\s(CVS\s2722)
-D 2005-09-19T15:37:07
+C Do\snot\soptimize\sviews\swith\san\sORDER\sBY\sclause\sif\sthey\sare\sused\sin\sa\sUNION\sALL\nthat\salso\shas\san\sORDER\sBY\sclause.\s\sTicket\s#1444.\s(CVS\s2723)
+D 2005-09-19T17:35:53
 F Makefile.in 12784cdce5ffc8dfb707300c34e4f1eb3b8a14f1
 F Makefile.linux-gcc 06be33b2a9ad4f005a5f42b22c4a19dab3cbb5c7
 F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@@ -63,10 +63,10 @@ F src/pragma.c 6d773e25e8af13ef0820531ad2793417f8a8959d
 F src/prepare.c fc098db25d2a121affb08686cf04833fd50452d4
 F src/printf.c bd421c1ad5e01013c89af63c60eab02852ccd15e
 F src/random.c 90adff4e73a3b249eb4f1fc2a6ff9cf78c7233a4
-F src/select.c 2d6a485a3fcb342e132ca1542556c1afaad56686
+F src/select.c 459fb935f1b3f6f0011c548a7664b4d7d062a041
 F src/shell.c 3596c1e559b82663057940d19ba533ad421c7dd3
 F src/sqlite.h.in 461b2535550cf77aedfd44385da11ef7d63e57a2
-F src/sqliteInt.h cc5874662b2b3236e2d70a23429561b9f469c423
+F src/sqliteInt.h f59e1ceccfca73737016b8912ac5f23995dd40c6
 F src/table.c 25b3ff2b39b7d87e8d4a5da0713d68dfc06cbee9
 F src/tclsqlite.c ac94682f9e601dd373912c46414a5a842db2089a
 F src/test1.c 0f1a66f65a54fba029f7e93b7500d49443dc959b
@@ -219,6 +219,7 @@ F test/threadtest1.c 6029d9c5567db28e6dc908a0c63099c3ba6c383b
 F test/threadtest2.c 97a830d53c24c42290501fdfba4a6e5bdd34748b
 F test/tkt1435.test f768e5415d102fa1d8de3f548469d8fd1b79abd8
 F test/tkt1443.test 1e83b6a1e7f6e261682e67106ab3bc05f6c70e90
+F test/tkt1444.test 0f0fc1f277691f904dea2abece6db919dcae2351
 F test/trace.test 9fd28695c463b90c2d32c387a432e01eb26e8ccf
 F test/trans.test 10506dc30305cfb8c4098359f7f6f64786f69c5e
 F test/trigger1.test 152aed5a1fa90709fe171f2ca501a6b7f7901479
@@ -309,7 +310,7 @@ F www/tclsqlite.tcl ddcf912ea48695603c8ed7efb29f0812ef8d1b49
 F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
 F www/version3.tcl a99cf5f6d8bd4d5537584a2b342f0fb9fa601d8b
 F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
-P 41e226d2ff5c0021fd07388da13f6d750fac508b
-R 8bfb93d2bda540419ac9c07075b31e02
+P 92126a216101d30e16390bf063d52d7182fbc763
+R 72c2d98bc3d985fe2db9dcfe0f467d3c
 U drh
-Z fdd630cee04ef4f9384ba8eea195e4c7
+Z 91dd1e861c7623fcdb1db511dd98ef1d

manifest.uuid

@@ -1 +1 @@
-92126a216101d30e16390bf063d52d7182fbc763
+6cc57fcf15cfa3ce73c78b1cac90f7806e5bae40

src/select.c

@@ -12,7 +12,7 @@
 ** This file contains C code routines that are called by the parser
 ** to handle SELECT statements in SQLite.
 **
-** $Id: select.c,v 1.270 2005/09/19 15:37:07 drh Exp $
+** $Id: select.c,v 1.271 2005/09/19 17:35:53 drh Exp $
 */
 #include "sqliteInt.h"
 
@@ -1571,6 +1571,7 @@ static int multiSelect(
       }
       p->pPrior = 0;
       p->pOrderBy = 0;
+      p->disallowOrderBy = pOrderBy!=0;
       pLimit = p->pLimit;
       p->pLimit = 0;
       pOffset = p->pOffset;
@@ -1971,7 +1972,7 @@ static int flattenSubquery(
      return 0;
   }
   if( p->isDistinct && subqueryIsAgg ) return 0;
-  if( p->pOrderBy && pSub->pOrderBy ) return 0;
+  if( (p->disallowOrderBy || p->pOrderBy) && pSub->pOrderBy ) return 0;
 
   /* Restriction 3:  If the subquery is a join, make sure the subquery is 
   ** not used as the right operand of an outer join.  Examples of why this

src/sqliteInt.h

@@ -11,7 +11,7 @@
 *************************************************************************
 ** Internal interface definitions for SQLite.
 **
-** @(#) $Id: sqliteInt.h,v 1.419 2005/09/17 15:20:27 drh Exp $
+** @(#) $Id: sqliteInt.h,v 1.420 2005/09/19 17:35:53 drh Exp $
 */
 #ifndef _SQLITEINT_H_
 #define _SQLITEINT_H_
@@ -1118,6 +1118,7 @@ struct Select {
   u8 isResolved;         /* True once sqlite3SelectResolve() has run. */
   u8 isAgg;              /* True if this is an aggregate query */
   u8 usesVirt;           /* True if uses an OpenVirtual opcode */
+  u8 disallowOrderBy;    /* Do not allow an ORDER BY to be attached if TRUE */
   SrcList *pSrc;         /* The FROM clause */
   Expr *pWhere;          /* The WHERE clause */
   ExprList *pGroupBy;    /* The GROUP BY clause */

test/tkt1444.test

@@ -0,0 +1,51 @@
+# 2005 September 19
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.
+#
+# This file implements tests to verify that ticket #1444 has been
+# fixed.  
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# The use of a VIEW that contained an ORDER BY clause within a UNION ALL
+# was causing problems.  See ticket #1444.
+#
+do_test tkt1444-1.1 {
+  execsql {
+    CREATE TABLE DemoTable (x INTEGER, TextKey TEXT, DKey Real);
+    CREATE INDEX DemoTableIdx ON DemoTable (TextKey);
+    INSERT INTO DemoTable VALUES(9,8,7);
+    INSERT INTO DemoTable VALUES(1,2,3);
+    CREATE VIEW DemoView AS SELECT * FROM DemoTable ORDER BY TextKey;
+    SELECT * FROM DemoTable UNION ALL SELECT * FROM DemoView ORDER BY 1;
+  }
+} {1 2 3 1 2 3 9 8 7 9 8 7}
+do_test tkt1444-1.2 {
+  execsql {
+    SELECT * FROM DemoTable UNION ALL SELECT * FROM DemoView;
+  }
+} {9 8 7 1 2 3 1 2 3 9 8 7}
+do_test tkt1444-1.3 {
+  execsql {
+    DROP VIEW DemoView;
+    CREATE VIEW DemoView AS SELECT * FROM DemoTable;
+    SELECT * FROM DemoTable UNION ALL SELECT * FROM DemoView ORDER BY 1;
+  }
+} {1 2 3 1 2 3 9 8 7 9 8 7}
+do_test tkt1444-1.4 {
+  execsql {
+    SELECT * FROM DemoTable UNION ALL SELECT * FROM DemoView;
+  }
+} {9 8 7 1 2 3 9 8 7 1 2 3}
+
+finish_test