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24 lines
1.0 KiB
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24 lines
1.0 KiB
Plaintext
How to use the ColumnStore UDF SDK
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Obtain the MariaDB columnstore source code from https://github.com/mariadb-corporation/mariadb-columnstore-server
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and follow the pre-requisite and build instructions.
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Go into the utils/udfsdk directory.
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At this point you can use the MCS_add() function template in udfsdk.cpp and udfmysql.cpp
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files to create your own function or just try that function as is.
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- Make the library
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$ make
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- Copy the libudf_mysql.so.1.0.0 and libudfsdk.so.1.0.0 file to /usr/local/mariadb/columnstore/lib on
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every columnstore node.
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$ cp libudf_mysql.so.1.0.0 libudfsdk.so.1.0.0 /usr/local/mariadb/columnstore/lib/
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- Restart ColumnStore
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$ mcsadmin restartsystem y
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- Using the mariadb client add the user defined function, e.g,
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$ mariadb
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> create function mcs_add returns integer soname 'libudf_mysql.so';
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> create function mcs_isnull returns string soname 'libudf_mysql.so';
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You should now be able to use the mcs_add(arg1, arg2) and mcs_isnull(arg) functions in the select and/or where clauses
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of SQL statements.
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