diff --git a/uppsrc/Sql/Sqlexp.h b/uppsrc/Sql/Sqlexp.h
index 8a7bd60aa..ea424ab7a 100644
--- a/uppsrc/Sql/Sqlexp.h
+++ b/uppsrc/Sql/Sqlexp.h
@@ -54,6 +54,8 @@ void td_array(SqlSet& set, const String& prefix, const char *x, int cnt);
 void td_var(SqlSet& set, const String& prefix, const char *x, SqlSet (*f)(const String&));
 void td_shrink(String *array, int cnt);
 
+bool EqualFields(Fields a, Fields b);
+
 // ----------
 
 class SqlCase {
diff --git a/uppsrc/Sql/sch_header.h b/uppsrc/Sql/sch_header.h
index c899c0a08..c09fa02d7 100644
--- a/uppsrc/Sql/sch_header.h
+++ b/uppsrc/Sql/sch_header.h
@@ -12,6 +12,8 @@ public:\
 	void FieldLayoutRaw(FieldOperator& f, const String& prefix = String()); \
 	void FieldLayout(FieldOperator& f); \
 	operator Fields()              { return callback(this, &S_##Table::FieldLayout); } \
+	bool operator==(const S_##Table& x) const  { return EqualFields(const_cast<S_##Table&>(*this), const_cast<S_##Table&>(x)); } \
+	bool operator!=(const S_##Table& x) const  { return !EqualFields(const_cast<S_##Table&>(*this), const_cast<S_##Table&>(x)); } \
 	S_##Table();
 
 #define TYPE(Table)                  CODETYPE(Table, __NIL)
diff --git a/uppsrc/Sql/util_td.cpp b/uppsrc/Sql/util_td.cpp
index d08db21fb..5551c667a 100644
--- a/uppsrc/Sql/util_td.cpp
+++ b/uppsrc/Sql/util_td.cpp
@@ -24,4 +24,20 @@ void td_shrink(String *array, int cnt) {
 	}
 }
 
+struct NfEqual : FieldOperator {
+	ValueArray va;
+	
+	virtual void Field(const char *name, Ref f) {
+		va.Add(f);
+	}
+};
+
+bool EqualFields(Fields a, Fields b)
+{
+	NfEqual fa, fb;
+	a(fa);
+	b(fb);
+	return fa.table == fb.table && fa.va == fb.va;
+}
+
 END_UPP_NAMESPACE