Omit the new SQLITE_VALUE_SUBTYPE name. Stay with legacy SQLTIE_SUBTYPE.

Add extra documentation to sqlite3_value_subtype() and sqlite3_result_subtype()
indicating that the SQLITE_SUBTYPE and SQLITE_RESULT_SUBTYPE properties are
required on functions that use those interfaces.

FossilOrigin-Name: 563ad3be60d22c45f1c5b9a3e67738593f8b38f137147c56514166fbabf95365

src/sqliteInt.h

@@ -2018,7 +2018,7 @@ struct FuncDestructor {
 #define SQLITE_FUNC_WINDOW   0x00010000 /* Built-in window-only function */
 #define SQLITE_FUNC_INTERNAL 0x00040000 /* For use by NestedParse() only */
 #define SQLITE_FUNC_DIRECT   0x00080000 /* Not for use in TRIGGERs or VIEWs */
-/* SQLITE_VALUE_SUBTYPE      0x00100000 // Consumer of subtypes */
+/* SQLITE_SUBTYPE            0x00100000 // Consumer of subtypes */
 #define SQLITE_FUNC_UNSAFE   0x00200000 /* Function has side effects */
 #define SQLITE_FUNC_INLINE   0x00400000 /* Functions implemented in-line */
 #define SQLITE_FUNC_BUILTIN  0x00800000 /* This is a built-in function */
@@ -2117,7 +2117,7 @@ struct FuncDestructor {
 #define JFUNCTION(zName, nArg, bUseCache, bRS, bWS, iArg, xFunc) \
   {nArg, SQLITE_FUNC_BUILTIN|SQLITE_DETERMINISTIC|SQLITE_FUNC_CONSTANT|\
    SQLITE_UTF8|((bUseCache)*SQLITE_FUNC_RUNONLY)|\
-   ((bRS)*SQLITE_VALUE_SUBTYPE)|((bWS)*SQLITE_RESULT_SUBTYPE), \
+   ((bRS)*SQLITE_SUBTYPE)|((bWS)*SQLITE_RESULT_SUBTYPE), \
    SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
 #define INLINE_FUNC(zName, nArg, iArg, mFlags) \
   {nArg, SQLITE_FUNC_BUILTIN|\
@@ -4454,7 +4454,7 @@ struct Window {
   int regStartRowid;
   int regEndRowid;
   u8 bExprArgs;           /* Defer evaluation of window function arguments
-                          ** due to the SQLITE_VALUE_SUBTYPE flag */
+                          ** due to the SQLITE_SUBTYPE flag */
 };
 
 #ifndef SQLITE_OMIT_WINDOWFUNC