When flattening a SELECT query, do not discard collation sequences explicitly attached to expressions in the parent query. Fix for #3997. (CVS 6949)

FossilOrigin-Name: b2784cf5d8b520fb714efdb2d2746b2c88b56edf

manifest

@@ -1,5 +1,5 @@
-C Fixed\sreversed\slabels\sin\sWHERETRACE()\sstatement.\s\sDebugging\scode\sonly.\s(CVS\s6948)
-D 2009-07-28T08:43:09
+C When\sflattening\sa\sSELECT\squery,\sdo\snot\sdiscard\scollation\ssequences\sexplicitly\sattached\sto\sexpressions\sin\sthe\sparent\squery.\sFix\sfor\s#3997.\s(CVS\s6949)
+D 2009-07-28T13:30:31
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in df9359da7a726ccb67a45db905c5447d5c00c6ef
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -159,7 +159,7 @@ F src/printf.c 508a1c59433353552b6553cba175eaa7331f8fc1
 F src/random.c 676b9d7ac820fe81e6fb2394ac8c10cff7f38628
 F src/resolve.c 4a61d03e49b15440878096e6030863fc628828f0
 F src/rowset.c c64dafba1f9fd876836c8db8682966b9d197eb1f
-F src/select.c 71748b8e244112cf73df9446c4246c192276c30d
+F src/select.c 90bc99bfcf8faae5ebb8d8948366c7c2a1b4cc00
 F src/shell.c db2643650b9268df89a4bedca3f1c6d9e786f1bb
 F src/sqlite.h.in 5672d9a6e19f80c1c7f1276dbe10e7d51c8fd97b
 F src/sqlite3ext.h 1db7d63ab5de4b3e6b83dd03d1a4e64fef6d2a17
@@ -658,6 +658,7 @@ F test/tkt3922.test 022ace32c049e3964f68492c12eb803e8e4856d8
 F test/tkt3929.test 6a4c3baefb4e75127356b7d675b5df42c35c00d1
 F test/tkt3935.test e15261fedb9e30a4305a311da614a5d8e693c767
 F test/tkt3992.test c193b9643b1c25d020c503a986d5e4089e65c530
+F test/tkt3997.test a335fa41ca3985660a139df7b734a26ef53284bd
 F test/tokenize.test ce430a7aed48fc98301611429595883fdfcab5d7
 F test/trace.test 19ffbc09885c3321d56358a5738feae8587fb377
 F test/trans.test d887cb07630dc39879a322d958ad8b006137485c
@@ -739,7 +740,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl 672f81d693a03f80f5ae60bfefacd8a349e76746
-P 224bc69a04f4fe6d1004125847761b7842c2bfe0
-R 4ca3c5bfa0c281d0c8065c6aa9f9769d
-U shane
-Z dd29c0202db09ae4eaced40be14766c5
+P 614a8d83158eb59e3fbe78d62461635bfcc13525
+R 975e8b479e878820dd333965b8b9186b
+U danielk1977
+Z 57f9d4273370bcb522584f6e1fe3cab8

manifest.uuid

@@ -1 +1 @@
-614a8d83158eb59e3fbe78d62461635bfcc13525
+b2784cf5d8b520fb714efdb2d2746b2c88b56edf

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 1.524 2009/06/12 03:27:27 drh Exp $
+** $Id: select.c,v 1.525 2009/07/28 13:30:31 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 
@@ -2355,6 +2355,9 @@ static Expr *substExpr(
       assert( pEList!=0 && pExpr->iColumn<pEList->nExpr );
       assert( pExpr->pLeft==0 && pExpr->pRight==0 );
       pNew = sqlite3ExprDup(db, pEList->a[pExpr->iColumn].pExpr, 0);
+      if( pExpr->pColl ){
+	pNew->pColl = pExpr->pColl;
+      }
       sqlite3ExprDelete(db, pExpr);
       pExpr = pNew;
     }

test/tkt3997.test

@@ -0,0 +1,73 @@
+# 2001 September 15
+#
+# 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.
+#
+#***********************************************************************
+#
+# Tests to make sure #3997 is fixed.
+#
+# $Id: tkt3997.test,v 1.1 2009/07/28 13:30:31 danielk1977 Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+proc reverse {lhs rhs} {
+  return [string compare $rhs $lhs]
+}
+proc usual {lhs rhs} {
+  return [string compare $lhs $rhs]
+}
+
+db collate reverse reverse
+db collate usual usual
+
+do_test tkt3997-1.1 {
+  execsql {
+    create table mytext(name BLOB);
+    INSERT INTO mytext VALUES('abc');
+    INSERT INTO mytext VALUES('acd');
+    INSERT INTO mytext VALUES('afe');
+  }
+} {}
+do_test tkt3997-1.2 {
+  execsql { 
+    SELECT name 
+    FROM mytext 
+    ORDER BY name COLLATE reverse 
+  }
+} {afe acd abc}
+do_test tkt3997-1.3 {
+  execsql { 
+    SELECT name 
+    FROM (SELECT name FROM mytext)  
+    ORDER BY name COLLATE reverse 
+  }
+} {afe acd abc}
+
+do_test tkt3997-2.1 {
+  execsql { 
+    CREATE TABLE mytext2(name COLLATE reverse);
+    INSERT INTO mytext2 SELECT name FROM mytext;
+  }
+} {}
+do_test tkt3997-2.2 {
+  execsql { 
+    SELECT name 
+    FROM (SELECT name FROM mytext2)  
+    ORDER BY name
+  }
+} {afe acd abc}
+do_test tkt3997-2.3 {
+  execsql { 
+    SELECT name 
+    FROM (SELECT name FROM mytext2)
+    ORDER BY name COLLATE usual
+  }
+} {abc acd afe}
+
+finish_test