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diff --git a/maintenance/ibm_db2/README b/maintenance/ibm_db2/README new file mode 100644 index 00000000..4a2c0f60 --- /dev/null +++ b/maintenance/ibm_db2/README @@ -0,0 +1,41 @@ +== Syntax differences between other databases and IBM DB2 == +{| border cellspacing=0 cellpadding=4 +!MySQL!!IBM DB2 +|- + +|SELECT 1 FROM $table LIMIT 1 +|SELECT COUNT(*) FROM SYSIBM.SYSTABLES ST +WHERE ST.NAME = '$table' AND ST.CREATOR = '$schema' +|- +|MySQL code tries to read one row and interprets lack of error as proof of existence. +|DB2 code counts the number of TABLES of that name in the database. There ought to be 1 for it to exist. +|- +|BEGIN +|(implicit) +|- +|TEXT +|VARCHAR(255) or CLOB +|- +|TIMESTAMPTZ +|TIMESTAMP +|- +|BYTEA +|VARGRAPHIC(255) +|- +|DEFAULT nextval('some_kind_of_sequence'), +|GENERATED ALWAYS AS IDENTITY (START WITH 0, INCREMENT BY 1), +|- +|CIDR +|VARCHAR(255) +|- +|LIMIT 10 +|FETCH FIRST 10 ROWS ONLY +|- +|ROLLBACK TO +|ROLLBACK TO SAVEPOINT +|- +|RELEASE +|RELEASE SAVEPOINT +|} +== See also == +*[http://ca.php.net/manual/en/function.db2-connect.php PHP Manual for DB2 functions]
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