Edit the WHEN and UPDATE OF clauses of trigger programs as part of ALTER TABLE

RENAME COLUMN. FossilOrigin-Name: 5fdb6b0aafba727139e1937ef5950e4434a77f95a10fc46f8010ca2de3922326
2025-08-07 02:42:48 +03:00 · 2018-08-13 17:14:26 +00:00
parent 4a2c747c4c
commit 5496d6a25a
9 changed files with 127 additions and 61 deletions
--- a/30
+++ b/30
@@ -1,5 +1,5 @@
-C Fix\slegacy\scomments\son\sToken.\s\sBegin\scommenting\sthe\snew\sALTER\sTABLE\sRENAME\nCOLUMN\scode.\s\sFix\sa\smemory\sleak\sin\sthe\ssqlite_rename_column()\sSQL\sfunction.
-D 2018-08-13T15:09:48.567
+C Edit\sthe\sWHEN\sand\sUPDATE\sOF\sclauses\sof\strigger\sprograms\sas\spart\sof\sALTER\sTABLE\nRENAME\sCOLUMN.
+D 2018-08-13T17:14:26.913
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in 0a3a6c81e6fcb969ff9106e882f0a08547014ba463cb6beca4c4efaecc924ee6
@@ -432,7 +432,7 @@ F spec.template 86a4a43b99ebb3e75e6b9a735d5fd293a24e90ca
 F sqlite.pc.in 42b7bf0d02e08b9e77734a47798d1a55a9e0716b
 F sqlite3.1 fc7ad8990fc8409983309bb80de8c811a7506786
 F sqlite3.pc.in 48fed132e7cb71ab676105d2a4dc77127d8c1f3a
-F src/alter.c 7a8e8f14b07063973b772b07921bcc54db36e26e8aae14d2584446ed5af9e513
+F src/alter.c 9f8231841d00ef09d328ecb39af46e0cd85ce4e39d416319d458f8aff7af10dd
 F src/analyze.c 3dc6b98cf007b005af89df165c966baaa48e8124f38c87b4d2b276fe7f0b9eb9
 F src/attach.c 4bd5b92633671d3e8ce431153ebb1893b50335818423b5373f3f27969f79769a
 F src/auth.c 32a5bbe3b755169ab6c66311c5225a3cd4f75a46c041f7fb117e0cbb68055114
@@ -442,7 +442,7 @@ F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
 F src/btree.c 3f5e1a03db871e627bf5da21092bf7434ecfc5c5980bbd7d45eba13341340173
 F src/btree.h febb2e817be499570b7a2e32a9bbb4b607a9234f6b84bb9ae84916d4806e96f2
 F src/btreeInt.h 620ab4c7235f43572cf3ac2ac8723cbdf68073be4d29da24897c7b77dda5fd96
-F src/build.c a8e71a3cf77ddf953a85d9d2d4c7fbc0a0f70ef4e4515915ad6ff1cdff9c9808
+F src/build.c 49cad074fcc2218f45e126375b4d8f7c3960d2fe2c3398bad862e1bfd640d7c4
 F src/callback.c 36caff1e7eb7deb58572d59c41cee8f064a11d00297616995c5050ea0cfc1288
 F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
 F src/ctime.c b157b01081f92442f8b0218ddb93ddce8ebddad36dbddeecfdd771561dd4f387
@@ -487,7 +487,7 @@ F src/os_win.c 070cdbb400097c6cda54aa005356095afdc2f3ee691d17192c54724ef146a971
 F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
 F src/pager.c 76d29b8a960dcb8b67210f095899d91e4a90673a6674ea58cfd1115b705a7fb9
 F src/pager.h c571b064df842ec8f2e90855dead9acf4cbe0d1b2c05afe0ef0d0145f7fd0388
-F src/parse.y 035b397bf1acbd3cb8293812b07c8aefce9f275d4de1442e113dbd0d2f733dce
+F src/parse.y 1cdfb5179649b0cde2459d0e76b5acb7007bb10f4744ae804b2326ed98c52060
 F src/pcache.c 135ef0bc6fb2e3b7178d49ab5c9176254c8a691832c1bceb1156b2fbdd0869bd
 F src/pcache.h 072f94d29281cffd99e46c1539849f248c4b56ae7684c1f36626797fee375170
 F src/pcache1.c 716975564c15eb6679e97f734cec1bfd6c16ac3d4010f05f1f8e509fc7d19880
@@ -503,7 +503,7 @@ F src/shell.c.in 6e0aad854be738a5d0368940459399be211e9ac43aebe92bb9ed46cfe38d0e1
 F src/sqlite.h.in c6451bb876adced3aba5b1682c6317d215c5eceaba21a6ce979e71a0b8d0bf95
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 9887b27e69c01e79c2cbe74ef73bf01af5b5703d6a7f0a4371e386d7249cb1c7
-F src/sqliteInt.h 6cce5956d82972f3e03444c15636222e97938eb9f3dad399df038052c51a04a6
+F src/sqliteInt.h 6a5d65117068808e2f37035d97a4cea6d55d679e02f9673b2b71ae6d5a0b1c8d
 F src/sqliteLimit.h 1513bfb7b20378aa0041e7022d04acb73525de35b80b252f1b83fedb4de6a76b
 F src/status.c 46e7aec11f79dad50965a5ca5fa9de009f7d6bde08be2156f1538a0a296d4d0e
 F src/table.c b46ad567748f24a326d9de40e5b9659f96ffff34
@@ -561,9 +561,9 @@ F src/test_windirent.h 90dfbe95442c9762357fe128dc7ae3dc199d006de93eb33ba3972e0a9
 F src/test_window.c cdae419fdcea5bad6dcd9368c685abdad6deb59e9fc8b84b153de513d394ba3f
 F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
 F src/threads.c 4ae07fa022a3dc7c5beb373cf744a85d3c5c6c3c
-F src/tokenize.c 3177575b587f3d0491ca5c3e937663ca3e91bf86adf4f2e8e9f7d0ab98bc66d3
+F src/tokenize.c fe35cb947ec54fe9a96895359b777a9305356c2f3c2917a1d83a57603108e66c
 F src/treeview.c e7a7f90552bb418533cdd0309b5eb71d4effa50165b880fc8c2001e613577e5f
-F src/trigger.c 4ace6d1d5ba9a89822deb287317f33c810440526eafe185c2d8a48c31df1e995
+F src/trigger.c f3ba315cd590a3db88fdfd259c8084e567746f6e0614efb3c806b205d7122276
 F src/update.c 345ce35eb1332eb4829857aa8b1f65a614b07dae91d0346c0dc2baacafbcc51b
 F src/upsert.c 47edd408cc73f8d3c00a140550d1ad180b407c146285947969dd09874802bf88
 F src/utf.c 810fbfebe12359f10bc2a011520a6e10879ab2a163bcb26c74768eab82ea62a5
@@ -599,7 +599,7 @@ F test/alter.test b820ab9dcf85f8e3a65bc8326accb2f0c7be64ef
 F test/alter2.test 7ea05c7d92ac99349a802ef7ada17294dd647060
 F test/alter3.test 4d79934d812eaeacc6f22781a080f8cfe012fdc3
 F test/alter4.test b6d7b86860111864f6cddb54af313f5862dda23b
-F test/altercol.test a64f69f67a8ac2ab7fd671b3166ad3454e0fea6bf8c22fdc3630a4b0cdeb57e8
+F test/altercol.test b3263a3d663e57e35fcd888614cb2256df42ac1be07d40282c5c6023a47a431b
 F test/altermalloc.test e81ac9657ed25c6c5bb09bebfa5a047cd8e4acfc
 F test/amatch1.test b5ae7065f042b7f4c1c922933f4700add50cdb9f
 F test/analyze.test b3a9c67d00e1df7588a5b7be9a0292899f94fe8cac1f94a017277474ca2e59df
@@ -1756,7 +1756,11 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 0b28dd5c2e4908d5e49eaedd359492e46de8af3bf84120f4683b3ea906882fbf
-R 8e4aad63439996e323e3c103c6b55b1d
-U drh
-Z 82791a60e4da34a95b2d48254121d988
+P 32edc8920376aabb84ebe1900eaa9512d23f1b44d6459e4916dc6b07db66e27c
+R 4f99214f849ec616e294c625bebc2173
+T *branch * edit-trigger-wrapper
+T *sym-edit-trigger-wrapper *
+T +closed 43c3d2d707a7c54dcb75660be9347d6bd79c4844f81f6ed73446570876f5f72b
+T -sym-alter-table-rename-column *
+U dan
+Z e89da0f8ef0add6d1c95dbb889527ec9
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-32edc8920376aabb84ebe1900eaa9512d23f1b44d6459e4916dc6b07db66e27c
+5fdb6b0aafba727139e1937ef5950e4434a77f95a10fc46f8010ca2de3922326
--- a/src/alter.c
+++ b/src/alter.c
@@ -846,7 +846,7 @@ void sqlite3AlterRenameColumn(
      "UPDATE \"%w\".%s SET "
      "sql = sqlite_rename_column(sql, %d, %d, %Q, %Q, %Q) "
      "WHERE name NOT LIKE 'sqlite_%%' AND ("
-      "   type = 'table' OR (type='index' AND tbl_name = %Q)"
+      "   type = 'table' OR (type IN ('index', 'trigger') AND tbl_name = %Q)"
      ")",
      zDb, MASTER_NAME, iCol, bQuote, zNew, pTab->zName, zOld, pTab->zName
  );
@@ -891,10 +891,12 @@ struct RenameToken {
 ** The context of an ALTER TABLE RENAME COLUMN operation that gets passed
 ** down into the Walker.
 */
+typedef struct RenameCtx RenameCtx;
 struct RenameCtx {
  RenameToken *pList;             /* List of tokens to overwrite */
  int nList;                      /* Number of tokens in pList */
  int iCol;                       /* Index of column being renamed */
+  const char *zOld;               /* Old column name */
 };

 /*
@@ -940,33 +942,40 @@ static void renameTokenFree(sqlite3 *db, RenameToken *pToken){
  }
 }

-static RenameToken *renameTokenFind(Parse *pParse, void *pPtr){
+static void renameTokenFind(Parse *pParse, RenameCtx *pCtx, void *pPtr){
  RenameToken **pp;
  for(pp=&pParse->pRename; (*pp); pp=&(*pp)->pNext){
    if( (*pp)->p==pPtr ){
      RenameToken *pToken = *pp;
      *pp = pToken->pNext;
-      pToken->pNext = 0;
-      return pToken;
+      pToken->pNext = pCtx->pList;
+      pCtx->pList = pToken;
+      pCtx->nList++;
+      break;
    }
  }
-  return 0;
 }

 static int renameColumnExprCb(Walker *pWalker, Expr *pExpr){
-  struct RenameCtx *p = pWalker->u.pRename;
-  if( pExpr->op==TK_COLUMN && pExpr->iColumn==p->iCol ){
-    RenameToken *pTok = renameTokenFind(pWalker->pParse, (void*)pExpr);
-    if( pTok ){
-      pTok->pNext = p->pList;
-      p->pList = pTok;
-      p->nList++;
+  RenameCtx *p = pWalker->u.pRename;
+  if( p->zOld && pExpr->op==TK_DOT ){
+    Expr *pLeft = pExpr->pLeft;
+    Expr *pRight = pExpr->pRight;
+    assert( pLeft->op==TK_ID && pRight->op==TK_ID );
+    if( 0==sqlite3_stricmp(pLeft->u.zToken, "old")
+     || 0==sqlite3_stricmp(pLeft->u.zToken, "new")
+    ){
+      if( 0==sqlite3_stricmp(pRight->u.zToken, p->zOld) ){
+        renameTokenFind(pWalker->pParse, p, (void*)pRight);
      }
    }
+  }else if( pExpr->op==TK_COLUMN && pExpr->iColumn==p->iCol ){
+    renameTokenFind(pWalker->pParse, p, (void*)pExpr);
+  }
  return WRC_Continue;
 }

-static RenameToken *renameColumnTokenNext(struct RenameCtx *pCtx){
+static RenameToken *renameColumnTokenNext(RenameCtx *pCtx){
  RenameToken *pBest = pCtx->pList;
  RenameToken *pToken;
  RenameToken **pp;
@@ -989,7 +998,7 @@ static void renameColumnFunc(
  sqlite3_value **argv
 ){
  sqlite3 *db = sqlite3_context_db_handle(context);
-  struct RenameCtx sCtx;
+  RenameCtx sCtx;
  const char *zSql = (const char*)sqlite3_value_text(argv[0]);
  int nSql = sqlite3_value_bytes(argv[0]);
  int bQuote = sqlite3_value_int(argv[2]);
@@ -1019,7 +1028,9 @@ static void renameColumnFunc(
  rc = sqlite3RunParser(&sParse, zSql, &zErr);
  assert( sParse.pNewTable==0 || sParse.pNewIndex==0 );
  if( db->mallocFailed ) rc = SQLITE_NOMEM;
-  if( rc==SQLITE_OK && sParse.pNewTable==0 && sParse.pNewIndex==0 ){
+  if( rc==SQLITE_OK 
+   && sParse.pNewTable==0 && sParse.pNewIndex==0 && sParse.pNewTrigger==0 
+  ){
    rc = SQLITE_CORRUPT_BKPT;
  }

@@ -1067,10 +1078,9 @@ static void renameColumnFunc(
    int bFKOnly = sqlite3_stricmp(zTable, sParse.pNewTable->zName);
    FKey *pFKey;
    if( bFKOnly==0 ){
-      sCtx.pList = renameTokenFind(
-          &sParse, (void*)sParse.pNewTable->aCol[sCtx.iCol].zName
+      renameTokenFind(
+          &sParse, &sCtx, (void*)sParse.pNewTable->aCol[sCtx.iCol].zName
      );
-      sCtx.nList = 1;
      assert( sCtx.iCol>=0 );
      if( sParse.pNewTable->iPKey==sCtx.iCol ){
        sCtx.iCol = -1;
@@ -1083,28 +1093,30 @@ static void renameColumnFunc(

    for(pFKey=sParse.pNewTable->pFKey; pFKey; pFKey=pFKey->pNextFrom){
      for(i=0; i<pFKey->nCol; i++){
-        RenameToken *pTok = 0;
        if( bFKOnly==0 && pFKey->aCol[i].iFrom==sCtx.iCol ){
-          pTok = renameTokenFind(&sParse, (void*)&pFKey->aCol[i]);
-          if( pTok ){
-            pTok->pNext = sCtx.pList;
-            sCtx.pList = pTok;
-            sCtx.nList++;
-          }
+          renameTokenFind(&sParse, &sCtx, (void*)&pFKey->aCol[i]);
        }
        if( 0==sqlite3_stricmp(pFKey->zTo, zTable)
         && 0==sqlite3_stricmp(pFKey->aCol[i].zCol, zOld)
        ){
-          pTok = renameTokenFind(&sParse, (void*)pFKey->aCol[i].zCol);
-          pTok->pNext = sCtx.pList;
-          sCtx.pList = pTok;
-          sCtx.nList++;
+          renameTokenFind(&sParse, &sCtx, (void*)pFKey->aCol[i].zCol);
        }
      }
    }
-  }else{
+  }else if( sParse.pNewIndex ){
    sqlite3WalkExprList(&sWalker, sParse.pNewIndex->aColExpr);
    sqlite3WalkExpr(&sWalker, sParse.pNewIndex->pPartIdxWhere);
+  }else{
+    sCtx.zOld = zOld;
+    sqlite3WalkExpr(&sWalker, sParse.pNewTrigger->pWhen);
+    if( sParse.pNewTrigger->pColumns ){
+      for(i=0; i<sParse.pNewTrigger->pColumns->nId; i++){
+        char *zName = sParse.pNewTrigger->pColumns->a[i].zName;
+        if( 0==sqlite3_stricmp(zName, zOld) ){
+          renameTokenFind(&sParse, &sCtx, (void*)zName);
+        }
+      }
+    }
  }

  assert( nQuot>=nNew );
@@ -1148,6 +1160,7 @@ renameColumnFunc_done:
  }
  sqlite3DeleteTable(db, sParse.pNewTable);
  if( sParse.pNewIndex ) sqlite3FreeIndex(db, sParse.pNewIndex);
+  sqlite3DeleteTrigger(db, sParse.pNewTrigger);
  renameTokenFree(db, sParse.pRename);
  renameTokenFree(db, sCtx.pList);
  sqlite3ParserReset(&sParse);
--- a/src/build.c
+++ b/src/build.c
@@ -3686,7 +3686,8 @@ void *sqlite3ArrayAllocate(
 **
 ** A new IdList is returned, or NULL if malloc() fails.
 */
-IdList *sqlite3IdListAppend(sqlite3 *db, IdList *pList, Token *pToken){
+IdList *sqlite3IdListAppend(Parse *pParse, IdList *pList, Token *pToken){
+  sqlite3 *db = pParse->db;
  int i;
  if( pList==0 ){
    pList = sqlite3DbMallocZero(db, sizeof(IdList) );
@@ -3704,6 +3705,9 @@ IdList *sqlite3IdListAppend(sqlite3 *db, IdList *pList, Token *pToken){
    return 0;
  }
  pList->a[i].zName = sqlite3NameFromToken(db, pToken);
+  if( IN_RENAME_COLUMN && pList->a[i].zName ){
+    sqlite3RenameToken(pParse, (void*)pList->a[i].zName, pToken);
+  }
  return pList;
 }

--- a/src/parse.y
+++ b/src/parse.y
@@ -908,9 +908,9 @@ insert_cmd(A) ::= REPLACE.            {A = OE_Replace;}
 idlist_opt(A) ::= .                       {A = 0;}
 idlist_opt(A) ::= LP idlist(X) RP.    {A = X;}
 idlist(A) ::= idlist(A) COMMA nm(Y).
-    {A = sqlite3IdListAppend(pParse->db,A,&Y);}
+    {A = sqlite3IdListAppend(pParse,A,&Y);}
 idlist(A) ::= nm(Y).
-    {A = sqlite3IdListAppend(pParse->db,0,&Y); /*A-overwrites-Y*/}
+    {A = sqlite3IdListAppend(pParse,0,&Y); /*A-overwrites-Y*/}

 /////////////////////////// Expression Processing /////////////////////////////
 //
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -3881,7 +3881,7 @@ void sqlite3FreeIndex(sqlite3*, Index*);
 #endif
 void sqlite3Insert(Parse*, SrcList*, Select*, IdList*, int, Upsert*);
 void *sqlite3ArrayAllocate(sqlite3*,void*,int,int*,int*);
-IdList *sqlite3IdListAppend(sqlite3*, IdList*, Token*);
+IdList *sqlite3IdListAppend(Parse*, IdList*, Token*);
 int sqlite3IdListIndex(IdList*,const char*);
 SrcList *sqlite3SrcListEnlarge(sqlite3*, SrcList*, int, int);
 SrcList *sqlite3SrcListAppend(sqlite3*, SrcList*, Token*, Token*);
--- a/src/tokenize.c
+++ b/src/tokenize.c
@@ -697,9 +697,11 @@ int sqlite3RunParser(Parse *pParse, const char *zSql, char **pzErrMsg){
    */
    sqlite3DeleteTable(db, pParse->pNewTable);
  }
+  if( !IN_RENAME_COLUMN ){
+    sqlite3DeleteTrigger(db, pParse->pNewTrigger);
+  }

  if( pParse->pWithToFree ) sqlite3WithDelete(db, pParse->pWithToFree);
-  sqlite3DeleteTrigger(db, pParse->pNewTrigger);
  sqlite3DbFree(db, pParse->pVList);
  while( pParse->pAinc ){
    AutoincInfo *p = pParse->pAinc;
--- a/src/trigger.c
+++ b/src/trigger.c
@@ -181,6 +181,7 @@ void sqlite3BeginTrigger(
    goto trigger_cleanup;
  }
  assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
+  if( !IN_RENAME_COLUMN ){
    if( sqlite3HashFind(&(db->aDb[iDb].pSchema->trigHash),zName) ){
      if( !noErr ){
        sqlite3ErrorMsg(pParse, "trigger %T already exists", pName);
@@ -190,6 +191,7 @@ void sqlite3BeginTrigger(
      }
      goto trigger_cleanup;
    }
+  }

  /* Do not create a trigger on a system table */
  if( sqlite3StrNICmp(pTab->zName, "sqlite_", 7)==0 ){
@@ -212,7 +214,7 @@ void sqlite3BeginTrigger(
  }

 #ifndef SQLITE_OMIT_AUTHORIZATION
-  {
+  if( !IN_RENAME_COLUMN ){
    int iTabDb = sqlite3SchemaToIndex(db, pTab->pSchema);
    int code = SQLITE_CREATE_TRIGGER;
    const char *zDb = db->aDb[iTabDb].zDbSName;
@@ -246,8 +248,14 @@ void sqlite3BeginTrigger(
  pTrigger->pTabSchema = pTab->pSchema;
  pTrigger->op = (u8)op;
  pTrigger->tr_tm = tr_tm==TK_BEFORE ? TRIGGER_BEFORE : TRIGGER_AFTER;
+  if( IN_RENAME_COLUMN ){
+    pTrigger->pWhen = pWhen;
+    pWhen = 0;
+  }else{
    pTrigger->pWhen = sqlite3ExprDup(db, pWhen, EXPRDUP_REDUCE);
-  pTrigger->pColumns = sqlite3IdListDup(db, pColumns);
+  }
+  pTrigger->pColumns = pColumns;
+  pColumns = 0;
  assert( pParse->pNewTrigger==0 );
  pParse->pNewTrigger = pTrigger;

@@ -296,6 +304,14 @@ void sqlite3FinishTrigger(
    goto triggerfinish_cleanup;
  }

+#ifndef SQLITE_OMIT_ALTERTABLE
+  if( IN_RENAME_COLUMN ){
+    assert( !db->init.busy );
+    pParse->pNewTrigger = pTrig;
+    pTrig = 0;
+  }else
+#endif
+
  /* if we are not initializing,
  ** build the sqlite_master entry
  */
@@ -337,7 +353,7 @@ void sqlite3FinishTrigger(

 triggerfinish_cleanup:
  sqlite3DeleteTrigger(db, pTrig);
-  assert( !pParse->pNewTrigger );
+  assert( IN_RENAME_COLUMN || !pParse->pNewTrigger );
  sqlite3DeleteTriggerStep(db, pStepList);
 }

--- a/test/altercol.test
+++ b/test/altercol.test
@@ -130,7 +130,7 @@ do_execsql_test 3.2 {
  SELECT * FROM t4;
 } {3 2 1}

-# do_execsql_test 3.3 { INSERT INTO t4 VALUES(6, 5, 4); } {}
+do_execsql_test 3.3 { INSERT INTO t4 VALUES(6, 5, 4); } {}

 #-------------------------------------------------------------------------
 #
@@ -208,5 +208,32 @@ do_execsql_test 6.3 {
  SELECT "where" FROM blob;
 } {}

+#-------------------------------------------------------------------------
+#
+reset_db
+do_execsql_test 7.0 {
+  CREATE TABLE c(x);
+  INSERT INTO c VALUES(0);
+  CREATE TABLE t6("col a", "col b", "col c");
+  CREATE TRIGGER zzz AFTER UPDATE OF "col a", "col c" ON t6 BEGIN
+    UPDATE c SET x=x+1;
+  END;
+}
+
+do_execsql_test 7.1 {
+  INSERT INTO t6 VALUES(0, 0, 0);
+  UPDATE t6 SET "col c" = 1;
+  SELECT * FROM c;
+} {1}
+
+do_execsql_test 7.2 {
+  ALTER TABLE t6 RENAME "col c" TO "col 3";
+}
+
+do_execsql_test 7.3 {
+  UPDATE t6 SET "col 3" = 0;
+  SELECT * FROM c;
+} {2}
+
 finish_test