Merge branch 'f-fix-23' into 'dev'

FIX: fix sql syntax error; fixes #23

Closes #23

See merge request caosdb/caosdb-mysqlbackend!21

CHANGELOG.md

@@ -47,6 +47,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed ###
 
+* #23 Incompatibility with MariaDB 10.3
 * Fixed the `>=` and `<=` operators for comparisons in POV query filters with
   stored DATE values. The fix makes the implementation consistent
   However, the current definition and implementation of the

procedures/retrieveEntity.sql

@@ -77,7 +77,7 @@ retrieveEntityBody: BEGIN
 
             IF IVersion IS NULL THEN
                 -- RETURN EARLY - Version does not exist.
-                SELECT 0 WHERE 0 = 1;
+                SELECT 0 FROM entities WHERE 0 = 1;
                 LEAVE retrieveEntityBody;
             END IF;