Make sure the columns of a VALUES() clause are named "column%d" even if

the VALUES() clause is a subquery in the FROM clause of an outer query.

FossilOrigin-Name: acf3b9cc9c3932431979995a1dceacc06c659ab400fad95ce3728ff8895a022b

manifest

@@ -1,5 +1,5 @@
-C Add\sthe\s--icc,\s--gcc7,\sand\s--orm\soptions\sto\sthe\sspeed-check.sh\stest\sscript.
-D 2017-07-08T22:30:30.933
+C Make\ssure\sthe\scolumns\sof\sa\sVALUES()\sclause\sare\snamed\s"column%d"\seven\sif\nthe\sVALUES()\sclause\sis\sa\ssubquery\sin\sthe\sFROM\sclause\sof\san\souter\squery.
+D 2017-07-09T00:30:58.430
 F Makefile.in 081e48dfe7f995d57ce1a88ddf4d2917b4349158648a6cd45b42beae30de3a12
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 20850e3e8d4d4791e0531955852d768eb06f24138214870d543abb1a47346fba
@@ -448,7 +448,7 @@ F src/printf.c 8757834f1b54dae512fb25eb1acc8e94a0d15dd2290b58f2563f65973265adb2
 F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
 F src/resolve.c 6aa1fb1212e601f65b983ee1215d69a591986c8f97a3805c425c625a53839539
 F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac
-F src/select.c c9f7b7196e196e93979665680d055a789938b8e025556097bf484b184c0dd576
+F src/select.c c1e669e01cb37c0683108a10e929615112572666053381df786806113b9a3ac4
 F src/shell.c a7067f647aef4b81569bbfd025f4fd120a4e7576a647d2aad05028eb50e50e48
 F src/sqlite.h.in c38c31f2a874af2b7d8443aba1fba3652d8ee75f60305d2512215cbe0fa0674a
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
@@ -1628,7 +1628,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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+R bd4690b24493be6c9d3f040b4f986ae1
 U drh
-Z 9e4f8a303b6a755dc44ed919de98f263
+Z ceb54c87f0670b76840ec1e6992b9263

manifest.uuid

@@ -1 +1 @@
-70dae08a9a6e35416f7268b9a95f3c8562b74697918bd1e9d5b5cf4719b9d075
+acf3b9cc9c3932431979995a1dceacc06c659ab400fad95ce3728ff8895a022b

src/select.c

@@ -1704,7 +1704,11 @@ int sqlite3ColumnsFromExprList(
         zName = pEList->a[i].zSpan;
       }
     }
-    zName = sqlite3MPrintf(db, "%s", zName);
+    if( zName ){
+      zName = sqlite3DbStrDup(db, zName);
+    }else{
+      zName = sqlite3MPrintf(db,"column%d",i);
+    }
 
     /* Make sure the column name is unique.  If the name is not unique,
     ** append an integer to the name so that it becomes unique.