extern int lf_check_file(int, uschar *, int, int, uid_t *, gid_t *,
const char *, uschar **);
extern uschar *lf_quote(uschar *, uschar *, int, uschar *, int *, int *);
-extern int lf_sqlperform(uschar *, uschar *, uschar *, uschar *, uschar **,
- uschar **, BOOL *, int(*)(uschar *, uschar *, uschar **,
+extern int lf_sqlperform(const uschar *, const uschar *, const uschar *,
+ const uschar *, uschar **,
+ uschar **, BOOL *, int(*)(const uschar *, uschar *, uschar **,
uschar **, BOOL *, BOOL *));
/* End of lf_functions.h */