Describe the use of the return value of fit_to_copy_get

ged · Mar 23, 2023 · 3b80033 · 3b80033
1 parent 31346bb
commit 3b80033
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/ext/pg_type_map_in_ruby.c b/ext/pg_type_map_in_ruby.c
@@ -210,6 +210,9 @@ pg_tmir_typecast_query_param( VALUE self, VALUE param_value, VALUE field )
  * This method is called, when a type map is used for decoding copy data,
  * before the value is casted.
  *
+ * Should return the expected number of columns or 0 if the number of columns is unknown.
+ * This number is only used for memory pre-allocation.
+ *
  */
 static VALUE pg_tmir_fit_to_copy_get_dummy( VALUE self ){}
 #endif