Fix plpgsql's handling of "simple" expression evaluation.

[pg-rex/syncrep.git] / src / pl / plpgsql / src / plpgsql.h

diff --git a/src/pl/plpgsql/src/plpgsql.h b/src/pl/plpgsql/src/plpgsql.h
index 16e073c..0d30e22 100644 (file)
--- a/src/pl/plpgsql/src/plpgsql.h
+++ b/src/pl/plpgsql/src/plpgsql.h
@@ -215,10 +215,12 @@ typedef struct PLpgSQL_expr
 
        /*
         * if expr is simple AND prepared in current transaction,
-        * expr_simple_state is valid. Test validity by seeing if expr_simple_lxid
-        * matches current LXID.
+        * expr_simple_state and expr_simple_in_use are valid. Test validity by
+        * seeing if expr_simple_lxid matches current LXID.  (If not,
+        * expr_simple_state probably points at garbage!)
         */
-       ExprState  *expr_simple_state;
+       ExprState  *expr_simple_state;          /* eval tree for expr_simple_expr */
+       bool            expr_simple_in_use;             /* true if eval tree is active */
        LocalTransactionId expr_simple_lxid;
 } PLpgSQL_expr;