schema_version - SCHEMA_VERSION option
This variable allows defining a database version for opening the dictionary (schema version). When opening an older version of a database one may run with the appropriate dictionary version valid for this database. Usually the system tries to detect the proper schema version.
When being set, this value is set typically in the configuration or ini-file in the SCHEMA_VERSION option for the data source definition.
Default: Current schema version of the dictionary
SCHEMA_VERSION=3
Type: uint32