Index: src/prepare.c
==================================================================
--- src/prepare.c
+++ src/prepare.c
@@ -714,10 +714,11 @@
 ** Checks if the specified token is a table, column, or function name,
 ** based on the databases associated with the statement being prepared.
 ** If the function fails, zero is returned and pRc is filled with the
 ** error code.
 */
+#if 0
 static int shouldTreatAsIdentifier(
   sqlite3 *db,        /* Database handle. */
   const char *zToken, /* Pointer to start of token to be checked */
   int nToken,         /* Length of token to be checked */
   int *pRc            /* Pointer to error code upon failure */
@@ -795,10 +796,11 @@
   sqlite3_mutex_leave(db->mutex);
 done1:
   if( zId!=zSpace ) sqlite3DbFree(db, zId);
   return bFound;
 }
+#endif
 
 /*
 ** Attempt to estimate the final output buffer size needed for the fully
 ** normalized version of the specified SQL string.  This should take into
 ** account any potential expansion that could occur (e.g. via IN clauses
@@ -970,23 +972,25 @@
         }
         if( j>0 && sqlite3IsIdChar(z[j-1]) && sqlite3IsIdChar(zSql[i]) ){
           z[j++] = ' ';
         }
         if( tokenType==TK_ID ){
-          int i2 = i, n2 = n, rc = SQLITE_OK;
+          int i2 = i, n2 = n  ;//, rc = SQLITE_OK;
           if( nParen>0 ){
             assert( nParen<nSql );
             sqlite3HashInsert(&inHash, zSql+nParen, 0);
           }
           if( flags&SQLITE_TOKEN_QUOTED ){ i2++; n2-=2; }
+#if 0
           if( shouldTreatAsIdentifier(db, zSql+i2, n2, &rc)==0 ){
             if( rc!=SQLITE_OK ) goto normalizeError;
             if( sqlite3_keyword_check(zSql+i2, n2)==0 ){
               z[j++] = '?';
               break;
             }
           }
+#endif
         }
         copyNormalizedToken(zSql, i, n, flags, z, &j);
         break;
       }
     }

Index: test/normalize.test
==================================================================
--- test/normalize.test
+++ test/normalize.test
@@ -205,11 +205,11 @@
   {0 {SELECT a FROM t1 WHERE x IN(?,?,?)AND hex8(?);}}
 
   430
   {SELECT "a" FROM t1 WHERE "x" IN ("1","2",'3');}
   0x2
-  {0 {SELECT"a"FROM t1 WHERE"x"IN(?,?,?);}}
+  {0 {SELECT"a"FROM t1 WHERE"x"IN("1","2",?);}}
 
   440
   {SELECT 'a' FROM t1 WHERE 'x';}
   0x2
   {0 {SELECT?FROM t1 WHERE?;}}