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https://www.ibm.com/support/knowledgecenter/en/SSEPGG_9.7.0/com.ibm.db2.luw.apdv.sqlpl.doc/doc/c0052894.html
DB2 Version 9.7 for Linux, UNIX, and Windows. Array support in SQL procedures. SQL procedures support parameters and variables of array types. Arrays are a convenient way of passing transient collections of data between an application and a stored procedure or between two stored procedures.
https://www.ibm.com/support/knowledgecenter/en/SSEPEK_12.0.0/apsg/src/tpc/db2z_arrays.html
An array can have an associated user-defined array type, or it can be the result of an SQL operation that returns an array value without an associated user-defined array type. Db2 12 - Application programming and SQL - Arrays in SQL statements
https://www.ibm.com/support/knowledgecenter/en/SSEPEK_11.0.0/sqlref/src/tpc/db2z_arrayvalues.html
An array value is a structure that contains an ordered collection of elements.. All elements of an array value must have the same data type. The cardinality of the array is equal to the number of elements in the array. An array value can be non-empty, empty (cardinality zero), or null.
https://ibmsystemsmag.com/IBM-Z/07/2010/sql-arrays-db2-for-i
By integrating arrays into the relational model, DB2 offers both performance and ease of use for array types. Finally, release 7.1 will be good news for vendors and developers on other database systems that already support arrays. The array support in DB2 for i 7.1 is compatible with the support offered in DB2 …
https://www.ibm.com/support/knowledgecenter/en/SSEPEK_11.0.0/sqlref/src/tpc/db2z_sql_createtypearray.html
Generated cast functions: The successful execution of the CREATE TYPE (array) statement causes the Db2 database manager to generate cast functions for the user-defined array type. Those cast functions are recorded in the Db2 catalog. The unqualified names of the two cast functions are ARRAY and the name of the array type.
http://archive.ibmsystemsmag.com/blogs/db2utor/january-2017/comparing-db2-12-function-levels-m100-and-m500/
Additional array support – DB2 11 introduced array data types. DB2 12 adds the capability to define a global variable as an array data type. In addition, the ARRAY_AGG function can now be invoked without a GROUP BY clause, and can be used with an associative array. Additional support for global variables – BLOB, CLOB or DBCLOB data types ...
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