ODBC query returns the value 4.7632030197448003, whereas in Zabbix it is saved as 4. I tried to crop the result to two characters after the decimal point. The result is the same. The decimal part is simply discarded.
Item type of information - Numeric (float)

Database Zabbix - PostgresSQL 9.6
Target for the ODBC query - PostgresSQL 9.6