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How do you create an index on a partitioned table?
You can create bitmap indexes on partitioned tables, with the restriction that the bitmap indexes must be local to the partitioned table. They cannot be global indexes. Global indexes can be unique. Local indexes can only be unique if the partitioning key is a part of the index key.
How do I know if my index is local?
index_name=’MY_PARTITIONED_INDEX’ ; The “locality” column of dba_part_indexes indicates whether the partitioned index is local (where locality=LOCAL) or global (where locality=GLOBAL) . If no rows are found, then it is a global non-partitioned index.
What is a global index and local index?
Global Index: A global index is a one-to-many relationship, allowing one index partition to map to many table partitions. Local Index: A local index is a one-to-one mapping between a index partition and a table partition.
Can a partitioning key be in all indexes?
The best way to prevent this from happening is to create a unique clustered index on your partitioning key (with something like an identity integer column if the key isn’t unique by itself). That way the partitioning key will automatically be in all of your nonclustered indexes. Thanks for reading!
When do you put the partitioning column in the index?
When partitioning a unique nonclustered index, the index key must contain the partitioning column. When partitioning a nonunique, nonclustered index, SQL Server adds the partitioning column by default as a nonkey (included) column of the index to make sure the index is aligned with the base table.
Can a partitioned table have a nonpartitioned index?
The index is a cluster index. The index is defined on a clustered table. You can mix partitioned and nonpartitioned indexes with partitioned and nonpartitioned tables: A partitioned table can have partitioned or nonpartitioned indexes. A nonpartitioned table can have partitioned or nonpartitioned indexes.
What’s the best way to prevent a partitioning key?
The best way to prevent this from happening is to create a unique clustered index on your partitioning key (with something like an identity integer column if the key isn’t unique by itself). That way the partitioning key will automatically be in all of your nonclustered indexes.