When expanding "*" in the result set of a SELECT, do not attach a table name

to columns that are in subsequent USING clauses.

FossilOrigin-Name: 91530990e018580ec5322ace6f0c369a32a3529a0bfb4defb25ca20223a2a80f

manifest

@@ -1,5 +1,5 @@
-C The\ssqlite3ProcessJoin()\sroutine\sconverts\sa\sNATURAL\sJOIN\sinto\sa\sJOIN\sUSING\sso\nthat\shenceforth\sthe\sNATURAL\skeyword\scan\sbe\signored.
+C When\sexpanding\s"*"\sin\sthe\sresult\sset\sof\sa\sSELECT,\sdo\snot\sattach\sa\stable\sname\nto\scolumns\sthat\sare\sin\ssubsequent\sUSING\sclauses.
-D 2022-04-15T17:08:40.527
+D 2022-04-15T18:30:48.111
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -552,12 +552,12 @@ F src/printf.c 05d8dfd2018bc4fc3ddb8b37eb97ccef7abf985643fa1caebdcf2916ca90fa32
 F src/random.c 097dc8b31b8fba5a9aca1697aeb9fd82078ec91be734c16bffda620ced7ab83c
 F src/resolve.c 2d0f29eadbc87154399b2794490a5bfd104daf818d76e59845ab5afb9bf66824
 F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92
-F src/select.c 820941d6c857e2cfdb2e56565bacd2b31b4adacc468550d44f8f9089888405e2
+F src/select.c d36cf25d63f1a2f2dd342cf4ade0d8b14e9ade92b3617627ecc7609d3cf7b624
 F src/shell.c.in eb7f10d5e2c47bd014d92ec5db1def21fcc1ed56ffaaa4ee715b6c37c370b47f
 F src/sqlite.h.in 2a35f62185eb5e7ecc64a2f68442b538ce9be74f80f28a00abc24837edcf1c17
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h f49e28c25bd941e79794db5415fdf7b202deb3bc072ed6f1ed273d578703684e
-F src/sqliteInt.h d0d71e92d3e2c7e00659057a214ef5d5516ec720ec0378b7ae4e82b02386174e
+F src/sqliteInt.h 51b79f1db169deb87fc8ac2f1c11e2c4fcf9893737072ce56dd45e6e7917d61b
 F src/sqliteLimit.h d7323ffea5208c6af2734574bae933ca8ed2ab728083caa117c9738581a31657
 F src/status.c 4a3da6d77eeb3531cb0dbdf7047772a2a1b99f98c69e90ce009c75fe6328b2c0
 F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
@@ -1947,8 +1947,11 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 40f3c95871e6f40f287ef2756abafb8fc56dffdd0af69436e5c7d8e95022d94e
+P 8378e1e0d289627fb294ccd3f5865ef49df3a42b8a5aa211e21be1b42d9da753
-R a4dbe6f876199f457625a48f56e40a96
+R ec06a8420fc58788f4e87c08a362458b
+T *branch * right-join-using
+T *sym-right-join-using *
+T -sym-right-join *
 U drh
-Z 67a6ae70c20850bccd3ed1b730f595c0
+Z ea7a56f0892499e7077e3a35b99d310a
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-8378e1e0d289627fb294ccd3f5865ef49df3a42b8a5aa211e21be1b42d9da753
+91530990e018580ec5322ace6f0c369a32a3529a0bfb4defb25ca20223a2a80f

src/select.c

@@ -541,6 +541,7 @@ static int sqlite3ProcessJoin(Parse *pParse, Select *p){
       }
       if( pUsing ){
         pRight->fg.isUsing = 1;
+        pRight->fg.isSynthUsing = 1;
         pRight->u3.pUsing = pUsing;
       }
     }
@@ -565,7 +566,8 @@ static int sqlite3ProcessJoin(Parse *pParse, Select *p){
         zName = pList->a[j].zName;
         iRightCol = sqlite3ColumnIndex(pRightTab, zName);
         if( iRightCol<0
-         || !tableAndColumnIndex(pSrc, i+1, zName, &iLeft, &iLeftCol,0,bRight)
+         || !tableAndColumnIndex(pSrc, i+1, zName, &iLeft, &iLeftCol,
+                                 pRight->fg.isSynthUsing, bRight)
         ){
           sqlite3ErrorMsg(pParse, "cannot join using column %s - column "
             "not present in both tables", zName);
@@ -5527,11 +5529,35 @@ int sqlite3ExpandSubquery(Parse *pParse, SrcItem *pFrom){
 #else
   pTab->tabFlags |= TF_Ephemeral;  /* Legacy compatibility mode */
 #endif
-
-
   return pParse->nErr ? SQLITE_ERROR : SQLITE_OK;
 }
 
+
+/*
+** Check the N SrcItem objects to the right of pBase.  (N might be zero!)
+** If any of those SrcItem objects have a USING clause containing zName
+** then return true.
+**
+** If N is zero, or none of the N SrcItem objects to the right of pBase
+** contains a USING clause, or if none of the USING clauses contain zName,
+** then return false.
+*/
+static int inAnyUsingClause(
+  const char *zName, /* Name we are looking for */
+  SrcItem *pBase,    /* The base SrcItem.  Looking at pBase[1] and following */
+  int N              /* How many SrcItems to check */
+){
+  while( N>0 ){
+    N--;
+    pBase++;
+    if( pBase->fg.isUsing==0 ) continue;
+    if( pBase->u3.pUsing==0 ) continue;
+    if( sqlite3IdListIndex(pBase->u3.pUsing, zName)>=0 ) return 1;
+  }
+  return 0;
+}
+
+
 /*
 ** This routine is a Walker callback for "expanding" a SELECT statement.
 ** "Expanding" means to do the following:
@@ -5795,9 +5821,16 @@ static int selectExpander(Walker *pWalker, Select *p){
               }
             }
             pRight = sqlite3Expr(db, TK_ID, zName);
+            if( longNames ){
+              zColname = sqlite3MPrintf(db, "%s.%s", zTabName, zName);
+              zToFree = zColname;
+            }else{
               zColname = zName;
               zToFree = 0;
-            if( longNames || pTabList->nSrc>1 ){
+            }
+            if( pTabList->nSrc>1
+             && !inAnyUsingClause(zName,pFrom,pTabList->nSrc-i-1)
+            ){
               Expr *pLeft;
               pLeft = sqlite3Expr(db, TK_ID, zTabName);
               pExpr = sqlite3PExpr(pParse, TK_DOT, pLeft, pRight);
@@ -5805,10 +5838,6 @@ static int selectExpander(Walker *pWalker, Select *p){
                 pLeft = sqlite3Expr(db, TK_ID, zSchemaName);
                 pExpr = sqlite3PExpr(pParse, TK_DOT, pLeft, pExpr);
               }
-              if( longNames ){
-                zColname = sqlite3MPrintf(db, "%s.%s", zTabName, zName);
-                zToFree = zColname;
-              }
             }else{
               pExpr = pRight;
             }

src/sqliteInt.h

@@ -3090,6 +3090,7 @@ struct SrcItem {
     unsigned isCte :1;         /* This is a CTE */
     unsigned notCte :1;        /* This item may not match a CTE */
     unsigned isUsing :1;       /* u3.pUsing is valid */
+    unsigned isSynthUsing :1;  /* u3.pUsing is synthensized from NATURAL */
   } fg;
   int iCursor;      /* The VDBE cursor number used to access this table */
   union {