Do not allow CREATE TABLE or CREATE VIEW of an object with a name tha…

…t looks

like a shadow table name.

FossilOrigin-Name: 6aef58b629d89955f85f65191ba2be67b2adfac4f0327fe9a7141cb2705dbc00

manifest

@@ -1,5 +1,5 @@
-C Break\sout\sthe\stest\sfor\swritable\sshadow\stables\sinto\sa\sseparate\ssubroutine.
-D 2019-11-16T13:51:31.727
+C Do\snot\sallow\sCREATE\sTABLE\sor\sCREATE\sVIEW\sof\san\sobject\swith\sa\sname\sthat\slooks\nlike\sa\sshadow\stable\sname.
+D 2019-11-16T14:15:19.202
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -470,7 +470,7 @@ F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
 F src/btree.c 12e251f8c3eaad05e6d0db94772bf779b3a644e18d884025da6bcbc98cad1d22
 F src/btree.h f27a33c49280209a93385e218306c4ee5f46ba8d7649d2f81a7166b282232484
 F src/btreeInt.h 91806f01fd1145a9a86ba3042f25c38d8faf6002701bf5e780742cf88bcff437
-F src/build.c 0001fed71cad92f94b3ed3ca38007de9cf61e1d48b209ba22feaeb606bbe6de1
+F src/build.c fe0b0b6dfab27a6f5778bd3dba8db879fda114c1d524a9597e5195ac55c8d01b
 F src/callback.c 88615dfc0a82167b65b452b4b305dbf86be77200b3343c6ffc6d03e92a01d181
 F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
 F src/ctime.c 1b0724e66f95f33b160b1af85caaf9cceb325d22abf39bd24df4f54a73982251
@@ -531,7 +531,7 @@ F src/shell.c.in c06961f202f3cc50b819744b7331d3caea3d79d958402f4900b066824855746
 F src/sqlite.h.in 95f50dc42fddab20064bf308c6756fcf2fdd84998dda15ae404a89c5c8d2cd10
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 72af51aa4e912e14cd495fb6e7fac65f0940db80ed950d90911aff292cc47ce2
-F src/sqliteInt.h 7bce951adf6bc8015accda3c204bc8da8127f7c8fa9e8684a9fcbf25e941206d
+F src/sqliteInt.h 98bc9562acfc361e34182aa25b00e2c73095732ddd3ba4158f984b94f5601f96
 F src/sqliteLimit.h 1513bfb7b20378aa0041e7022d04acb73525de35b80b252f1b83fedb4de6a76b
 F src/status.c 46e7aec11f79dad50965a5ca5fa9de009f7d6bde08be2156f1538a0a296d4d0e
 F src/table.c b46ad567748f24a326d9de40e5b9659f96ffff34
@@ -634,7 +634,7 @@ F test/altercol.test 54374d2ba18af25bb24e23acf18a60270d4ec120b7ec0558078b59d5aa1
 F test/alterlegacy.test 82022721ce0de29cedc9a7af63bc9fcc078b0ee000f8283b4b6ea9c3eab2f44b
 F test/altermalloc.test 167a47de41b5c638f5f5c6efb59784002b196fff70f98d9b4ed3cd74a3fb80c9
 F test/altermalloc2.test fa7b1c1139ea39b8dec407cf1feb032ca8e0076bd429574969b619175ad0174b
-F test/altertab.test 8069e5a8cbd3cb35732d3ec680dcc5273c2587ebd8e6a5d51084fa8059e468e5
+F test/altertab.test 4d8b79b0b88b62b90b710390df14fe99e0a3578345526886eaa550e28e3065dc
 F test/altertab2.test 8883693952f6d7fb5f754dbf1d694ed780aa883027bef04cb1fb99a3b88c9272
 F test/altertab3.test f40013d333e273da57e329fac6c2268a58aa09d17c3575936b343eeb2fa09180
 F test/amatch1.test b5ae7065f042b7f4c1c922933f4700add50cdb9f
@@ -1849,10 +1849,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 70390bbca49e706649ca5b7c031f0baf416fc38798c17e5f3b73746b3e66e3b5
-R eb1e2d60d183f45db7dd5d6f1b4dd659
-T *branch * defensive-improvements
-T *sym-defensive-improvements *
-T -sym-trunk *
+P 8ad34d36a141fa8f5d9bd784dfeb892c983897a6dc6b867607cc668508acf944
+R eb081275a7e8dd518362d4efeb289e7e
 U drh
-Z 25e7114e721d6c257eca936cdc80fddc
+Z 5fd6ba2bd9359116ce6160036d7c9b86

manifest.uuid

@@ -1 +1 @@
-8ad34d36a141fa8f5d9bd784dfeb892c983897a6dc6b867607cc668508acf944
+6aef58b629d89955f85f65191ba2be67b2adfac4f0327fe9a7141cb2705dbc00

src/build.c

@@ -856,13 +856,14 @@ int sqlite3CheckObjectName(
       }
     }
   }else{
-    if( pParse->nested==0 
-     && 0==sqlite3StrNICmp(zName, "sqlite_", 7)
+    if( (pParse->nested==0 && 0==sqlite3StrNICmp(zName, "sqlite_", 7))
+     || (sqlite3ReadOnlyShadowTables(db) && sqlite3ShadowTableName(db, zName))
     ){
       sqlite3ErrorMsg(pParse, "object name reserved for internal use: %s",
                       zName);
       return SQLITE_ERROR;
     }
+
   }
   return SQLITE_OK;
 }
@@ -2129,7 +2130,7 @@ static void convertToWithoutRowidTable(Parse *pParse, Table *pTab){
 ** zName is temporarily modified while this routine is running, but is
 ** restored to its original value prior to this routine returning.
 */
-static int isShadowTableName(sqlite3 *db, char *zName){
+int sqlite3ShadowTableName(sqlite3 *db, const char *zName){
   char *zTail;                  /* Pointer to the last "_" in zName */
   Table *pTab;                  /* Table that zName is a shadow of */
   Module *pMod;                 /* Module for the virtual table */
@@ -2147,8 +2148,6 @@ static int isShadowTableName(sqlite3 *db, char *zName){
   if( pMod->pModule->xShadowName==0 ) return 0;
   return pMod->pModule->xShadowName(zTail+1);
 }
-#else
-# define isShadowTableName(x,y) 0
 #endif /* ifndef SQLITE_OMIT_VIRTUALTABLE */
 
 /*
@@ -2190,7 +2189,7 @@ void sqlite3EndTable(
   p = pParse->pNewTable;
   if( p==0 ) return;
 
-  if( pSelect==0 && isShadowTableName(db, p->zName) ){
+  if( pSelect==0 && sqlite3ShadowTableName(db, p->zName) ){
     p->tabFlags |= TF_Shadow;
   }
 

src/sqliteInt.h

@@ -4548,6 +4548,11 @@ void sqlite3AutoLoadExtensions(sqlite3*);
 #  define sqlite3VtabInSync(db) ((db)->nVTrans>0 && (db)->aVTrans==0)
 #endif
 int sqlite3ReadOnlyShadowTables(sqlite3 *db);
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+  int sqlite3ShadowTableName(sqlite3 *db, const char *zName);
+#else
+# define sqlite3ShadowTableName(A,B) 0
+#endif
 int sqlite3VtabEponymousTableInit(Parse*,Module*);
 void sqlite3VtabEponymousTableClear(sqlite3*,Module*);
 void sqlite3VtabMakeWritable(Parse*,Table*);

test/altertab.test

@@ -547,13 +547,29 @@ ifcapable fts3 {
   } {1 {table y1_segments may not be modified}}
 
   do_catchsql_test 16.20 {
-    ALTER TABLE y1_segments RENAME TO abc;
-  } {1 {table y1_segments may not be altered}}
-
-  do_catchsql_test 16.21 {
     DROP TABLE y1_segments;
   } {1 {table y1_segments may not be dropped}}
 
+  do_catchsql_test 16.20 {
+    ALTER TABLE y1_segments RENAME TO abc;
+  } {1 {table y1_segments may not be altered}}
+  sqlite3_db_config db DEFENSIVE 0
+  do_catchsql_test 16.22 {
+    ALTER TABLE y1_segments RENAME TO abc;
+  } {0 {}}
+  sqlite3_db_config db DEFENSIVE 1
+  do_catchsql_test 16.23 {
+    CREATE TABLE y1_segments AS SELECT * FROM abc;
+  } {1 {object name reserved for internal use: y1_segments}}
+  do_catchsql_test 16.24 {
+    CREATE VIEW y1_segments AS SELECT * FROM abc;
+  } {1 {object name reserved for internal use: y1_segments}}
+  sqlite3_db_config db DEFENSIVE 0
+  do_catchsql_test 16.25 {
+    ALTER TABLE abc RENAME TO y1_segments;
+  } {0 {}}
+  sqlite3_db_config db DEFENSIVE 1
+
   do_execsql_test 16.30 {
     ALTER TABLE y1 RENAME TO z1;
   }