From: drh <>
Date: Fri, 3 Jul 2026 14:38:08 +0000 (+0000)
Subject: Improved error messages for EXCLUDE clauses.
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=07711e2e5773d9de14b67cce497cef1a80d6cc51;p=thirdparty%2Fsqlite.git

Improved error messages for EXCLUDE clauses.

FossilOrigin-Name: 7a80577fcf8101e563727c4a96970eb7252c4f19e0671aa352ab2d9b1deebb7f
---

diff --git a/manifest b/manifest
index 0c7aaaeaff..c8ec10a3a3 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C New\soptimizations\sto\sbring\sperformance\sup\sto\sparity\swith\sthe\scode\sbefore\nadding\sEXCLUDE.\s\sRaise\san\serror\sif\san\sEXCLUDE\sterm\sis\snot\sa\scolumn.
-D 2026-07-03T10:15:36.936
+C Improved\serror\smessages\sfor\sEXCLUDE\sclauses.
+D 2026-07-03T14:38:08.125
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -729,7 +729,7 @@ F src/os_win.c 1227a3e962b017d676d985a8aec0d64f273991931ea0a0b99773651102f62df4
 F src/os_win.h c06ccc3a090cf54202ea58981c298817f3309d4c9e4d52ad0a02927346493721
 F src/pager.c 678ee3b68638ee427cc1b071b11181d0f2a827f6cb4d6ec7c12d5fa5f6a752d0
 F src/pager.h 6137149346e6c8a3ddc1eeb40aee46381e9bc8b0fcc6dda8a1efde993c2275b8
-F src/parse.y 70d0a993d4646c26e0d7e79b2661476ba296d2eacc4001845be302cbff18c725
+F src/parse.y 0485c3ec4e46f19f1980441cbe5b90265a4ff80c2a08f181a26efe1e38bdf27c
 F src/pcache.c 588cc3c5ccaaadde689ed35ce5c5c891a1f7b1f4d1f56f6cf0143b74d8ee6484
 F src/pcache.h 092b758d2c5e4dabb30eae46d8dfad77c0f70b16bf3ff1943f7a232b0fe0d4ba
 F src/pcache1.c d7ee0f95992501a65379f620b3de1430b64e52e397769938668a9fd9dd1c8145
@@ -739,12 +739,12 @@ F src/printf.c b480176bd0aaed9d64e804cfa3ca27fc585f65a73e7c7ca2fe9b9016db2cf6d5
 F src/random.c 606b00941a1d7dd09c381d3279a058d771f406c5213c9932bbd93d5587be4b9c
 F src/resolve.c d0724113da9f5c0430d2052808ce59519f51ae7c4fbb1f5ef21fe3a832956086
 F src/rowset.c 8432130e6c344b3401a8874c3cb49fefe6873fec593294de077afea2dce5ec97
-F src/select.c 362fffc28c029477bd5abd198b442fd3dfa65372058f61b82e093ede2b4d24cf
+F src/select.c 27bb18ee28d3f24efaa6d3cae6ab4736a17e798621d38811ade21165a3c91428
 F src/shell.c.in a4e83895cfa336065ad7f7a7dea8fc2a19d050f7ce7466621c67208acaac9e44
 F src/sqlite.h.in d9ec41feb4cd804e68b174328b43beb3f1f71bba13e1c7a439efb826d301cccc
 F src/sqlite3.rc 015537e6ac1eec6c7050e17b616c2ffe6f70fca241835a84a4f0d5937383c479
 F src/sqlite3ext.h 0efd4723bad9124ea1f581d9f1ea0254ac1c6f3e5fb29e4f3dcf36c72485a456
-F src/sqliteInt.h e0324e481eaa7adaf5fc2d79caae838b1d88d3466c50453345d4628b003f3db6
+F src/sqliteInt.h 3bcb33549d564a4264a5b02a0a8f722c1bd83007cb0948dc4de6d7a61b868832
 F src/sqliteLimit.h c70656b67ab5b96741a8f1c812bdd80c81f2b1c1e443d0cc3ea8c33bb1f1a092
 F src/status.c 7565d63a79aa2f326339a24a0461a60096d0bd2bce711fefb50b5c89335f3592
 F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
@@ -2210,8 +2210,8 @@ F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee
 F tool/warnings.sh a554d13f6e5cf3760f041b87939e3d616ec6961859c3245e8ef701d1eafc2ca2
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
 F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
-P 8b050ed8075f17e3da4022f429c6a772079b9d24426e316d428824951ec11c01
-R 731e90565987a3e60a336af228a967b7
+P 40bd447c4bd5412f8babafa405a3d0dc739107e6b450ca23da4659eeb964e8b9
+R 93fc78c5ff17e3d6b1d02d4df44aecd8
 U drh
-Z 846f7fedf62f477816791a88c1b91b59
+Z 8be4dfeb91e8ba3c82e0697a582239f3
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 27e40b3cd8..76be3dd9ab 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-40bd447c4bd5412f8babafa405a3d0dc739107e6b450ca23da4659eeb964e8b9
+7a80577fcf8101e563727c4a96970eb7252c4f19e0671aa352ab2d9b1deebb7f
diff --git a/src/parse.y b/src/parse.y
index b50c4d954a..054b852218 100644
--- a/src/parse.y
+++ b/src/parse.y
@@ -770,6 +770,8 @@ selcollist(A) ::= sclp(A) scanpt nm(X) DOT STAR(Y) colexcl(E). {
 %destructor cexcllist {sqlite3ExprListDelete(pParse->db, $$);}
 %type cexclitem {ExprList*}
 %destructor cexclitem {sqlite3ExprListDelete(pParse->db, $$);}
+%type cexclexcl {ExprList*}
+%destructor cexclexcl {sqlite3ExprListDelete(pParse->db, $$);}
 %type cexclreplace {ExprList*}
 %destructor cexclreplace {sqlite3ExprListDelete(pParse->db, $$);}
 %type cexclrename {ExprList*}
@@ -781,10 +783,13 @@ colexcl(A) ::= LP cexcllist(X) RP. {A = X;}
 cexcllist(A) ::= cexclitem(A).
 cexcllist(A) ::= cexcllist(A) cexclitem(X).
    {A = parserExcludeConcat(pParse,A,X);}
-cexclitem(A) ::= EXCLUDE LP idlist(X) RP.
-   {A = parserExcludeIdList(pParse,X);}
+cexclitem(A) ::= EXCLUDE LP cexclexcl(X) RP. {A = X;}
 cexclitem(A) ::= REPLACE LP cexclreplace(X) RP. {A = X;}
 cexclitem(A) ::= RENAME LP cexclrename(X) RP. {A = X;}
+cexclexcl(A) ::= nm(X).
+   {A = parserExcludeExpr(pParse,0,&X,0,ENAME_EXCLUDE);}
+cexclexcl(A) ::= cexclexcl(A) COMMA nm(X).
+   {A = parserExcludeExpr(pParse,A,&X,0,ENAME_EXCLUDE);}
 cexclreplace(A) ::= nm(X) WITH expr(Y).
    {A = parserExcludeExpr(pParse,0,&X,Y,ENAME_REPLACE);}
 cexclreplace(A) ::= cexclreplace(A) COMMA nm(X) WITH expr(Y).
@@ -819,44 +824,28 @@ cexclrename(A) ::= cexclrename(A) COMMA nm(X) AS nm(Y). {
     sqlite3ExprListDelete(pParse->db, pSrc);
     return pDest;
   }
-  /* Convert an IdList in pSrc into an EXCLUDE ExprList and return
-  ** the ExprList.  Free pSrc when done */
-  static ExprList *parserExcludeIdList(
-    Parse *pParse,    /* Parsing context */
-    IdList *pSrc      /* Identifiers come from this list */
-  ){
-    int i;
-    ExprList *pDest = 0;
-    if( pSrc==0 ) return 0;
-    for(i=0; i<pSrc->nId; i++){
-      pDest = sqlite3ExprListAppend(pParse, pDest, 0);
-      if( pDest ){
-        int j = pDest->nExpr - 1;
-        pDest->a[j].zEName = pSrc->a[i].zName;
-        pDest->a[j].fg.eEName = ENAME_EXCLUDE;
-        pSrc->a[i].zName = 0;
-      }
-    }
-    sqlite3IdListDelete(pParse->db, pSrc);
-    return pDest;
-  }
-  /* Add a single new REPLACE or RENAME term into the EXCLUDE ExprList
-  ** in pDest. */
+  /* Add a single new entry to the EXCLUDE ExprList in pDest. */
   static ExprList *parserExcludeExpr(
     Parse *pParse,    /* Parsing context */
     ExprList *pDest,  /* Append one term to this ExprList */
     Token *pName,     /* Name of the column to be replaced */
     Expr *pExpr,      /* Replacement expression */
-    int eEName        /* ENAME_REPLACE or ENAME_RENAME */
+    int eEName        /* ENAME_REPLACE, ENAME_RENAME, or ENAME_EXCLUDE */
   ){
+    assert( eEName>=ENAME_EXCLUDE && eEName<=ENAME_RENAME );
+    assert( eEName!=ENAME_EXCLUDE || pExpr==0 );
     pDest = sqlite3ExprListAppend(pParse, pDest, pExpr);
     sqlite3ExprListSetName(pParse, pDest, pName, 1);
     if( pDest ){
-      pDest->a[pDest->nExpr-1].fg.eEName = eEName;
+      struct ExprList_item *pItem = pDest->a + (pDest->nExpr - 1);
+      pItem->fg.eEName = eEName;
+      pItem->u.iENameOfst = (int)(pName->z - pParse->zTail);
     }
     return pDest;
   }
 }
+
+
 // An option "AS <id>" phrase that can follow one of the expressions that
 // define the result set, or one of the tables in the FROM clause.
 //
diff --git a/src/select.c b/src/select.c
index a1bc5da61f..e617d50694 100644
--- a/src/select.c
+++ b/src/select.c
@@ -5938,6 +5938,31 @@ static int inAnyUsingClause(
   return 0;
 }
 
+/*
+** pExclude is an EXCLUDE clause following a * wildcard in the result set.
+** Check to ensure that every term of that EXCLUDE clause has been matched.
+** Generate necessary error message.
+*/
+static void selectCheckForExcludeErrors(Parse *pParse, ExprList *pExclude){
+  int i, j;
+  assert( pExclude!=0 );
+  for(i=0; i<pExclude->nExpr; i++){
+    struct ExprList_item *p = pExclude->a + i;
+    if( p->fg.done==0 ){
+      for(j=0; j<i; j++){
+        if( sqlite3_stricmp(pExclude->a[j].zEName,p->zEName)==0 ){
+          sqlite3ErrorMsg(pParse, "second use of column \"%s\"", p->zEName);
+          pParse->db->errByteOffset = p->u.iENameOfst;
+          return;
+        }
+      }
+      sqlite3ErrorMsg(pParse, "no column named \"%s\"", p->zEName);
+      pParse->db->errByteOffset = p->u.iENameOfst;
+      return;
+    }
+  }
+}
+
 
 /*
 ** This routine is a Walker callback for "expanding" a SELECT statement.
@@ -6156,8 +6181,9 @@ static int selectExpander(Walker *pWalker, Select *p){
         zTName = pE->pLeft ? pE->pLeft->u.zToken : 0;
 
 #ifdef SQLITE_DEBUG
-        /* If there is an EXCLUDE clause, make sure fg.done is initialized
-        ** to zero, which should have occurred in the parser */
+        /* Verify that the fg.done flag is initially clear in every
+        ** term of the EXCLUDE clause.  The parser should have left it
+        ** this way. */
         if( pExclude ){
           int kk;
           for(kk=0; kk<pExclude->nExpr; kk++){
@@ -6349,14 +6375,7 @@ static int selectExpander(Walker *pWalker, Select *p){
           }
         }
         if( pExclude ){
-          int kk;
-          for(kk=0; kk<pExclude->nExpr; kk++){
-            if( pExclude->a[kk].fg.done==0 ){
-              sqlite3ErrorMsg(pParse, "no column named \"%s\"",
-                              pExclude->a[kk].zEName);
-              break;
-            }
-          }
+          selectCheckForExcludeErrors(pParse, pExclude);
         }
         if( !tableSeen ){
           if( zTName ){
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index b4fa23acc3..3e61940776 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -3265,6 +3265,7 @@ struct ExprList {
       } x;
       int iConstExprReg;   /* Register in which Expr value is cached. Used only
                            ** by Parse.pConstExpr */
+      int iENameOfst;      /* Locate of zEName for EXCLUDE clauses */
     } u;
   } a[FLEXARRAY];          /* One slot for each expression in the list */
 };