Index: src/pragma.c
==================================================================
--- src/pragma.c
+++ src/pragma.c
@@ -14,18 +14,19 @@
 #include "sqliteInt.h"
 
 /*
 ** Interpret the given string as a safety level.  Return 0 for OFF,
 ** 1 for ON or NORMAL and 2 for FULL.  Return 1 for an empty or 
-** unrecognized string argument.
+** unrecognized string argument.  The FULL option is disallowed
+** if the omitFull parameter it 1.
 **
 ** Note that the values returned are one less that the values that
 ** should be passed into sqlite3BtreeSetSafetyLevel().  The is done
 ** to support legacy SQL code.  The safety level used to be boolean
 ** and older scripts may have used numbers 0 for OFF and 1 for ON.
 */
-static u8 getSafetyLevel(const char *z){
+static u8 getSafetyLevel(const char *z, int omitFull, int dflt){
                              /* 123456789 123456789 */
   static const char zText[] = "onoffalseyestruefull";
   static const u8 iOffset[] = {0, 1, 2, 4, 9, 12, 16};
   static const u8 iLength[] = {2, 2, 3, 5, 3, 4, 4};
   static const u8 iValue[] =  {1, 0, 0, 0, 1, 1, 2};
@@ -32,23 +33,23 @@
   int i, n;
   if( sqlite3Isdigit(*z) ){
     return (u8)sqlite3Atoi(z);
   }
   n = sqlite3Strlen30(z);
-  for(i=0; i<ArraySize(iLength); i++){
+  for(i=0; i<ArraySize(iLength)-omitFull; i++){
     if( iLength[i]==n && sqlite3StrNICmp(&zText[iOffset[i]],z,n)==0 ){
       return iValue[i];
     }
   }
-  return 1;
+  return dflt;
 }
 
 /*
 ** Interpret the given string as a boolean value.
 */
 u8 sqlite3GetBoolean(const char *z){
-  return getSafetyLevel(z)&1;
+  return getSafetyLevel(z,1,0)!=0;
 }
 
 /* The sqlite3GetBoolean() function is used by other modules but the
 ** remainder of this file is specific to PRAGMA processing.  So omit
 ** the rest of the file if PRAGMAs are omitted from the build.
@@ -839,11 +840,11 @@
     }else{
       if( !db->autoCommit ){
         sqlite3ErrorMsg(pParse, 
             "Safety level may not be changed inside a transaction");
       }else{
-        pDb->safety_level = getSafetyLevel(zRight)+1;
+        pDb->safety_level = getSafetyLevel(zRight,0,1)+1;
       }
     }
   }else
 #endif /* SQLITE_OMIT_PAGER_PRAGMAS */
 

Index: src/sqlite.h.in
==================================================================
--- src/sqlite.h.in
+++ src/sqlite.h.in
@@ -2636,14 +2636,14 @@
 ** query parameter on F.  If P is a query parameter of F
 ** has no explicit value, then sqlite3_uri_parameter(F,P) returns
 ** a pointer to an empty string.
 **
 ** The sqlite3_uri_boolean(F,P,B) routine assumes that P is a boolean
-** parameter and returns true (1) or false (0) according to the value
-** of P.  The value of P is true if it is "yes" or "true" or "on" or 
-** a non-zero number and is false otherwise.  If P is not a query parameter
-** on F then sqlite3_uri_boolean(F,P,B) returns (B!=0).
+** parameter and returns true (non-zero) or false (0) according to the value
+** of P.  The value of P is true if it is "yes" or "true" or "on"
+** or if value of P begins with a non-zero number. If P is not a query
+** parameter on F then sqlite3_uri_boolean(F,P,B) returns (B!=0).
 **
 ** The sqlite3_uri_int64(F,P,D) routine converts the value of P into a
 ** 64-bit signed integer and returns that integer, or D if P does not
 ** exist.  If the value of P is something other than an integer, then
 ** zero is returned.