Oracle index rebuild

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To fix this fragmentation, we need to rebuild the index.

Syntax

Note: During offline rebuild the table is not used for transaction purpose.

Example of rebuild index

Check index present on table

Script to rebuild all indexes on a table

During Rebuild you can also change the tablespace of index

Verify all details such as parallel, tablespace name, table name, order (ascending or descending), column name, etc.

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rename_index_partition

Use the clauses to rename index or to . If is a local index on a composite-partitioned table, then Oracle Database deallocates unused space from each index subpartition.

  • You cannot rebuild an entire partitioned index. You can also split or rename the unusable partition before rebuilding it.

    Restriction on Allocating Extents

    You cannot specify this clause for an index on a temporary table or for a range-partitioned or composite-partitioned index.

    Refer to allocate_extent_clause for a full description of this clause. Refer to Oracle Database VLDB and Partitioning Guide for a discussion of these restrictions.

    oracle index rebuild

  • You can specify the parameter only as part of the , the clause, or the clause.

    • DISABLE Clause

    applies only to a function-based index.

  • You cannot specify this clause for an index on a temporary table.

    Restrictions on UPDATE BLOCK REFERENCES

    This clause is subject to the following restrictions:

    • You cannot specify the for an index on a hash-partitioned table.

      This routine enables the cartridge code to update the stale guess data block addresses in the index.

    • modify_index_partition

    Use the clause to modify the real physical attributes, logging attribute, or storage characteristics of index partition or its subpartitions. .

    alter_index_partitioning

    The partitioning clauses of the statement are valid only for partitioned indexes.

    To determine whether an index contains orphaned index entries, you can query the column of the , , data dictionary views. All rows in the underlying table are processed before the insertion of index data is committed, and this requires adequate rollback segment space.

    The ONLINE keyword rebuilds the index without blocking the index; that is, queries can use the spatial index while it is being rebuilt.

    Refer to ... This clause is not valid for hash-partitioned global indexes.

  • To terminate monitoring of the index, specify .