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2020f35e88
* MCOL-5092 Ensure column width is correct for datatype
Change MODA return type to STRING
Modify MODA to handle every numeric type
* MCOL-5162 MODA to support char and varchar with collation support
Fixes to the aggregate bit functions
When we fixed the storage sign issue for MCOL-5092, it uncovered a problem in the bit aggregates (bit_and, bit_or and bit_xor). These aggregates should always return UBIGINT, but they relied on the type of the argument column, which gave bad results.
How to use the ColumnStore UDF SDK
Obtain the MariaDB columnstore source code from https://github.com/mariadb-corporation/mariadb-columnstore-server
and follow the pre-requisite and build instructions.
Go into the utils/udfsdk directory.
At this point you can use the MCS_add() function template in udfsdk.cpp and udfmysql.cpp
files to create your own function or just try that function as is.
- Make the library
$ make
- Copy the libudf_mysql.so.1.0.0 and libudfsdk.so.1.0.0 file to /usr/local/mariadb/columnstore/lib on
every columnstore node.
$ cp libudf_mysql.so.1.0.0 libudfsdk.so.1.0.0 /usr/local/mariadb/columnstore/lib/
- Restart ColumnStore
$ mcsadmin restartsystem y
- Using the mariadb client add the user defined function, e.g,
$ mariadb
> create function mcs_add returns integer soname 'libudf_mysql.so';
> create function mcs_isnull returns string soname 'libudf_mysql.so';
You should now be able to use the mcs_add(arg1, arg2) and mcs_isnull(arg) functions in the select and/or where clauses
of SQL statements.