Full_Name: Joel Linn Version: 2.4.45 as well as git OS: Ubuntu (docker image) URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (37.120.2.83) Hi, I wanted to use back-sql and tried against our Firebird database, as that didn't work i spun up a Postgres container with the data from the sources. For both cases it seems the backend is broken as it reports empty fields when loading the attribute mappings, although they are definetly not empty: 5bfaced6 backsql_oc_get_attr_mapping(): executing at_query "SELECT sel_expr_u,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return,name FROM ldap_attr_mappings WHERE oc_map_id=?" for objectClass "document" with param oc_id=2 5bfaced6 backsql_oc_get_attr_mapping(): required column #0 "name" is empty I played with the sources (moved the snprintf/DEBUG code before the field checking section that generates the error, around line 370 in schema-map.c) and found out that the first 3 columns are always null, you can confirm that by defining the at_query in slapd.conf and swapping the field names around. My guess is the binding in backsql_BindRowAsStrings is faulty. As I said i tried two different ODBC drivers. full log https://pastebin.com/4B2wjCLp configuration https://pastebin.com/JMwVVMDx