CHAR and VARCHAR types
Using the CHAR and VARCHAR data types with different databases.
The CHAR and VARCHAR types are designed to store character
strings, but all database servers do not have the same semantics for these types.
The maximum size, supported characters sets and length semantics of CHAR and
VARCHAR types can be very different from one database system to another. Consider
using character types and sizes that are common across all the database systems you target.
Important:
Most database engine brands allow to create table columns using a different character encoding than the database. This is not supported with Genero: All table columns must use the same character encoding defined at the database level.
The behavior of database servers may differ in the following areas related to
CHAR/VARCHAR types.
| Database Server Type | Character types topic |
|---|---|
| IBM® Informix® | CHAR/VARCHAR in IBM Informix |
| Microsoft™ SQL Server | CHAR/VARCHAR in SQL Server |
| Oracle® MySQL / MariadDB | CHAR/VARCHAR in Oracle MySQL |
| Oracle Database Server | CHAR/VARCHAR in Oracle DB |
| PostgreSQL | CHAR/VARCHAR in PostgreSQL |
| SAP HANA® | CHAR/VARCHAR in SAP HANA |
| SQLite | CHAR/VARCHAR in SQLite |
| Dameng® | CHAR/VARCHAR in Dameng |