Database Functions
The following sets of functions are used for managing data in databases accessed via Database profiles:
- Database Table functions - Look up and insert data into tables
- Callable Statement functions - Execute stored procedures
- Prepared Statement functions - Efficiently execute statements multiple times and has support for failover
- Database Bulk functions - Bundle multiple queries into one SQL statement
Note!
All database-related APL functions use a db connection pool, and they pick a connection from the pool for each invocation. Connection properties, such as the transaction state, are handled internally by each function and are never visible in APL.
These database functions are currently designed to work with the following database data types; character, string, integer and date data types such as VARCHAR, INTEGER, NUMBER, DATE and TIMESTAMP.
Other database data types are restricted for APL database functions. The list below contains examples of such types, usually very large data types or custom objects, structures and similar types.
- Large object data types such as BLOB/CLOB
- User-defined structures/objects
- User-defined collections/arrays
- Spatial/Geometry
- JSON, XML
Info!
parses and stores BLOB data as a hex string and CLOB data as a string. To insert BLOB data using APL, you must use string/bytearray.
Warning!
PostgreSQL does not support BLOB/CLOB. The BLOB equivalent for PostgreSQL will be BYTEA and CLOB equivalent will be TEXT.
This chapter includes the following sections: