Make sure that GROUP BY terms select input column names in preference to

output column names, in compliance with the SQL standard.
Ticket [1c69be2dafc28].

FossilOrigin-Name: f2d175f975cd0be63425424ec322a98fb650019e

manifest

@@ -1,5 +1,5 @@
-C Bare\sidentifiers\sin\sORDER\sBY\sclauses\sbind\smore\stightly\sto\soutput\scolumn\sname,\nbut\sidentifiers\sin\sexpressions\sbind\smore\stightly\sto\sinput\scolumn\snames.\nThis\sis\sa\scompromise\sbetween\sSQL92\sand\sSQL99\sbehavior\sand\sis\swhat\nPostgreSQL\sand\sMS-SQL\sdo.\s\sTicket\s[f617ea3125e9c].
-D 2013-08-15T20:24:27.463
+C Make\ssure\sthat\sGROUP\sBY\sterms\sselect\sinput\scolumn\snames\sin\spreference\sto\noutput\scolumn\snames,\sin\scompliance\swith\sthe\sSQL\sstandard.\nTicket\s[1c69be2dafc28].
+D 2013-08-15T22:40:21.803
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -214,7 +214,7 @@ F src/pragma.c 590c75750d93ec5a1f903e4bb0dc6d2a0845bf8b
 F src/prepare.c fa6988589f39af8504a61731614cd4f6ae71554f
 F src/printf.c 41c49dac366a3a411190001a8ab495fa8887974e
 F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50
-F src/resolve.c 2a760f369ddbcd951f176556c8ec05be04cdd0da
+F src/resolve.c 9d53899cc6e1f4ec0b4632d07e97d57827bf63b9
 F src/rowset.c 64655f1a627c9c212d9ab497899e7424a34222e0
 F src/select.c 8b148eb851f384412aea57091659d14b369918ca
 F src/shell.c 927e17b37b63b24461e372d982138fb22c4df321
@@ -733,7 +733,7 @@ F test/regexp1.test 497ea812f264d12b6198d6e50a76be4a1973a9d8
 F test/reindex.test 44edd3966b474468b823d481eafef0c305022254
 F test/releasetest.mk 2eced2f9ae701fd0a29e714a241760503ccba25a
 F test/releasetest.tcl 06d289d8255794073a58d2850742f627924545ce
-F test/resolver01.test a98ed8a2e9f78600155d783389ad4e6537010285
+F test/resolver01.test 33abf37ff8335e6bf98f2b45a0af3e06996ccd9a
 F test/rollback.test a1b4784b864331eae8b2a98c189efa2a8b11ff07
 F test/rowhash.test 0bc1d31415e4575d10cacf31e1a66b5cc0f8be81
 F test/rowid.test f777404492adb0e00868fd706a3721328fd3af48
@@ -1105,7 +1105,7 @@ F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/wherecosttest.c f407dc4c79786982a475261866a161cd007947ae
 F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
-P 53cd9ebfaf401c7932bf591e134a527c9962b88e
-R b873391074dfe27843eed5ca71b0596f
+P c78b357c00a35ed48ce2ffbc041de8d22570d1e2
+R 0cad26d57aaadc86e4d0689961c53035
 U drh
-Z 52475f320db5f901cc1dc06cbb7fef10
+Z 9ac8068bb659c66e2e7c0f0532626e1f

manifest.uuid

@@ -1 +1 @@
-c78b357c00a35ed48ce2ffbc041de8d22570d1e2
+f2d175f975cd0be63425424ec322a98fb650019e

src/resolve.c

@@ -1043,14 +1043,16 @@ static int resolveOrderGroupBy(
   for(i=0, pItem=pOrderBy->a; i<pOrderBy->nExpr; i++, pItem++){
     Expr *pE = pItem->pExpr;
     Expr *pE2 = sqlite3ExprSkipCollate(pE);
-    iCol = resolveAsName(pParse, pSelect->pEList, pE2);
-    if( iCol>0 ){
-      /* If an AS-name match is found, mark this ORDER BY column as being
-      ** a copy of the iCol-th result-set column.  The subsequent call to
-      ** sqlite3ResolveOrderGroupBy() will convert the expression to a
-      ** copy of the iCol-th result-set expression. */
-      pItem->iOrderByCol = (u16)iCol;
-      continue;
+    if( zType[0]!='G' ){
+      iCol = resolveAsName(pParse, pSelect->pEList, pE2);
+      if( iCol>0 ){
+        /* If an AS-name match is found, mark this ORDER BY column as being
+        ** a copy of the iCol-th result-set column.  The subsequent call to
+        ** sqlite3ResolveOrderGroupBy() will convert the expression to a
+        ** copy of the iCol-th result-set expression. */
+        pItem->iOrderByCol = (u16)iCol;
+        continue;
+      }
     }
     if( sqlite3ExprIsInteger(pE2, &iCol) ){
       /* The ORDER BY term is an integer constant.  Again, set the column

test/resolver01.test

@@ -149,4 +149,60 @@ do_execsql_test resolver01-4.1 {
   SELECT '3', substr(m,2) AS m FROM t4 ORDER BY lower(m);
 } {1 x 1 y 1 z 2 x 2 y 2 z 3 z 3 y 3 x}
 
+##########################################################################
+# Test cases for ticket [1c69be2dafc28]:  Make sure the GROUP BY binds
+# more tightly to the input tables in all cases.
+#
+# This first case case has been wrong in SQLite for time out of mind.
+# For SQLite version 3.7.17 the answer was two rows, which is wrong.
+#
+do_execsql_test resolver01-5.1 {
+  CREATE TABLE t5(m CHAR(2));
+  INSERT INTO t5 VALUES('ax');
+  INSERT INTO t5 VALUES('bx');
+  INSERT INTO t5 VALUES('cy');
+  SELECT count(*), substr(m,2,1) AS m FROM t5 GROUP BY m ORDER BY 1, 2;
+} {1 x 1 x 1 y}
+
+# This case is unambiguous and has always been correct.
+#
+do_execsql_test resolver01-5.2 {
+  SELECT count(*), substr(m,2,1) AS mx FROM t5 GROUP BY m ORDER BY 1, 2;
+} {1 x 1 x 1 y}
+
+# This case is not allowed in standard SQL, but SQLite allows and does
+# the sensible thing.
+#
+do_execsql_test resolver01-5.3 {
+  SELECT count(*), substr(m,2,1) AS mx FROM t5 GROUP BY mx ORDER BY 1, 2;
+} {1 y 2 x}
+do_execsql_test resolver01-5.4 {
+  SELECT count(*), substr(m,2,1) AS mx FROM t5
+   GROUP BY substr(m,2,1) ORDER BY 1, 2;
+} {1 y 2 x}
+
+# These test case weere provided in the 2013-08-14 email from Rob Golsteijn
+# that originally reported the problem of ticket [1c69be2dafc28].
+#
+do_execsql_test resolver01-6.1 {
+  CREATE TABLE t61(name);
+  SELECT min(name) FROM t61 GROUP BY lower(name);
+} {}
+do_execsql_test resolver01-6.2 {
+  SELECT min(name) AS name FROM t61 GROUP BY lower(name); 
+} {}
+do_execsql_test resolver01-6.3 {
+  CREATE TABLE t63(name);
+  INSERT INTO t63 VALUES (NULL);
+  INSERT INTO t63 VALUES ('abc');
+  SELECT count(),
+       NULLIF(name,'abc') AS name
+    FROM t63
+   GROUP BY lower(name);
+} {1 {} 1 {}}
+
+
+
+
+
 finish_test