1 files changed, 10 insertions, 0 deletions
diff --git a/src/interfaces/libpq/pqexpbuffer.h b/src/interfaces/libpq/pqexpbuffer.h
index efd652c80a3..f7a4e24c1b9 100644
--- a/src/interfaces/libpq/pqexpbuffer.h
+++ b/src/interfaces/libpq/pqexpbuffer.h
@@ -158,6 +158,16 @@ extern void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...) pg_attribute
 extern void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...) pg_attribute_printf(2, 3);
 
 /*------------------------
+ * appendPQExpBufferVA
+ * Attempt to format data and append it to str.  Returns true if done
+ * (either successful or hard failure), false if need to retry.
+ *
+ * Caution: callers must be sure to preserve their entry-time errno
+ * when looping, in case the fmt contains "%m".
+ */
+extern bool appendPQExpBufferVA(PQExpBuffer str, const char *fmt, va_list args) pg_attribute_printf(2, 0);
+
+/*------------------------
  * appendPQExpBufferStr
  * Append the given string to a PQExpBuffer, allocating more space
  * if necessary.