Restrict the scope of the sqlite3_stmt_readonly() interface to a specific

subset of prepared statement types.

FossilOrigin-Name: 919b06c3a803abb9236606a9b5885f0d8181e730

manifest

@@ -1,8 +1,8 @@
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-C Adding\sthe\ssqlite3_stmt_readonly()\sinterface.
-D 2010-11-16T23:10:26
+C Restrict\sthe\sscope\sof\sthe\ssqlite3_stmt_readonly()\sinterface\sto\sa\sspecific\nsubset\sof\sprepared\sstatement\stypes.
+D 2010-11-17T02:02:45
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 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -179,7 +179,7 @@ F src/resolve.c 1c0f32b64f8e3f555fe1f732f9d6f501a7f05706
 F src/rowset.c 69afa95a97c524ba6faf3805e717b5b7ae85a697
 F src/select.c 550d67688f5e8bc8022faf6d014838afba1415af
 F src/shell.c 8517fc1f9c59ae4007e6cc8b9af91ab231ea2056
-F src/sqlite.h.in 533fbbd82130f0edc01396f1e53a698cdf1b590e
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manifest.uuid

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src/sqlite.h.in

@@ -2632,14 +2632,13 @@ const char *sqlite3_sql(sqlite3_stmt *pStmt);
 ** CAPI3REF: Determine If An SQL Statement Writes The Database
 **
 ** ^The sqlite3_stmt_readonly(X) interface returns true (non-zero) if
-** the [prepared statement] X is guaranteed to leave the database file
-** unmodified.  ^If the sqlite3_stmt_readonly(X) interface returns false (zero)
-** then evaluating the statement might change the database file, but this
-** is not guaranteed as the write operation might be conditional and the
-** condition might not be met.  ^If X is a NULL pointer then
-** sqlite3_stmt_readonly(X) returns true.  If X is a non-NULL pointer but
-** is not a pointer to a valid, unfinalized prepared statement, then the
-** behavior is undefined and probably harmful.
+** the [prepared statement] X is [SELECT] statement and false (zero) if
+** X is an [INSERT], [UPDATE], [DELETE], CREATE, DROP, [ANALYZE],
+** [ALTER], or [REINDEX] statement.
+** If X is a NULL pointer or any other kind of statement, including but
+** not limited to [ATTACH], [DETACH], [COMMIT], [ROLLBACK], [RELEASE],
+** [SAVEPOINT], [PRAGMA], or [VACUUM] the result of sqlite3_stmt_readonly(X) is
+** undefined.
 */
 int sqlite3_stmt_readonly(sqlite3_stmt *pStmt);