index partitioning in oracle 12c

In my opinion, one of the unsung “Heroes” of the new 12c Oracle database are improvements associated with Partitioning. Physical attributes of an existing index partition can be modified by ALTER INDEX MODIFY PARTITION and ALTER INDEX REBUILD PARTITION. Consequently global indexes do not support partition independence. For a partitioned index, you can specify the compression type on a partition by partition basis. By default, any index is created as FULL index, which decouples the index from the table indexing property. A local index can be created UNIQUE if the partitioning columns form a subset of the index columns. For a local index to be unique (or, more accurately, for a unique/primary key constraint to be supported by a local index) the constraint/index has to contain the partition key, and c3_dt is the partitioning column Oracle supports a wide array of partitioning methods: Range Partitioning - the data is distributed based on a range of values. However, partitioned indexes are more complicated than partitioned tables because there are three types of partitioned indexes: Oracle Database supports all three types. There are several guidelines for partitioning indexes. For example, in Figure 3-5, a local index is partitioned on chkdate with an index key on acctno. Of course, if there is also a predicate on the partitioning columns, then multiple index probes might not be necessary. ORA-14086: A partitioned index may not be rebuilt as a whole. The duration of a partition maintenance operation remains proportional to partition size if the partitioned table has only local indexes. When you make an existing index unusable, its index segment is dropped. All commands worked for me up to: --Creating Partition online ALTER TABLE t1 MODIFY PARTITION BY RANGE (yr_qtr) INTERVAL (1) ( PARTITION P1 VALUES LESS THAN (20141) ) ONLINE; Not sure why.. Oracle can take advantage of the fact that a local index is equipartitioned with the underlying table to generate better query access plans. 19c | Dropping a partition will discard the rows stored in that partition as a DDL statement. In a local index, all keys in a particular index partition refer only to rows stored in a single underlying table partition. Which Index is Better Global Or Local in Partitioned Table? For DSS applications, local nonprefixed indexes can improve performance because many index partitions can be scanned in parallel by range queries on the index key. A prefixed index is partitioned on a left prefix of the index columns. For example, a key cannot be an expression when creating a local unique index on a partitioned table. About, About Tim Hall In a table containing historical data, it is common for an index to be defined on one column to support the requirements of fast access by that column. The sales_ix index is defined on acct_no because there are queries that need fast access to the data by account number. The non-indexed partitions are flagged as unusable. It executes quickly and uses few system resources (Undo and Redo). Local Nonprefixed (any partitioning method), Global Prefixed (range partitioning only). First post for 2014 !! Oracle Database Reference for information about the DBA_INDEXES, DBA_IND_PARTITIONS, DBA_IND_SUBPARTITIONS, and DBA_PART_INDEXES views. ALTER INDEX REBUILD [PARTITION] – This SQL statement rebuilds the entire index or index partition as is done in releases previous to Oracle Database 12 c Release 1 (12.1). Oracle does not support global nonprefixed partitioned indexes. This insures that all rows in the underlying table can be represented in the index. SQL | Even with the partition indexing settings in place, by default indexes are created as INDEXING FULL, so the partition setting are ignored. You cannot have a unique local nonprefixed index unless the partitioning key is a subset of the index key. You can also specify advanced index compression on index partitions even when the parent index is not compressed. Nonprefixed indexes are important because they are particularly useful in historical databases. The key points are: If an index is local, then it is equipartitioned with the underlying table. Local indexes support more availability when there are partition or subpartition maintenance operations on the table. For composite-partitioned tables, this clause lets you specify that the index is subpartitioned on the same columns, with the same number of subpartitions and the same subpartition bounds as table . In Oracle Database 12c Release 2 (12.2) the SPLIT PARTITION and SPLIT SUBPARTITION operations on heap tables can be performed online so they don't block DML. The database administrator is responsible for defining the initial partitioning of a global index at creation and for maintaining the partitioning over time. SQL> create index i on t (id) global partition by hash (id) partitions 32; Index created. Prior to 12c, several partition maintenance commands would cause the partition to be locked against DML commands until the partition maintenance command completed. Blog | Then you can recover the corresponding table and index partitions or subpartitions. Cause: User attempted to rebuild a partitioned index using ALTER INDEX REBUILD statement, which is illegal. 11g | A local partitioned index creates a one-for-one match between the indexes and the partitions in the table. 18c | Figure 3-6 Global Prefixed Partitioned Index. Each index partition may contain keys that refer to many different partitions or subpartitions in the table. Oracle Database Administrator’s Guide for information about advanced index compression. Physical attributes of global index partitions created by ALTER INDEX SPLIT PARTITION are determined as follows: Values of physical attributes of the partition being split are used whenever a new value is not specified. Advanced index compression with partitioned indexes can reduce the storage requirements for indexes. Bitmap indexes on nonpartitioned tables cannot be partitioned. trackback. using a different partitioning key from the table. Physical attributes of partitions created by CREATE INDEX are determined as follows: Values of physical attributes specified (explicitly or by default) for the index are used whenever the value of a corresponding partition attribute is not specified. An unusable index or index partition must be rebuilt, or dropped and re-created, before it can be used. Method 1. Figure 3-5 illustrates an example of a local nonprefixed index. Figure 3-4 illustrates another example of a local prefixed index. 12c Partial Indexes For Partitioned Tables Part I (Ignoreland) July 8, 2013 Posted by Richard Foote in 12c, Oracle Indexes, Partial Indexes, Partitioning. 9i | Global indexes can also be created as partial indexes, with only the flagged partitions included in the index. Afterward, you must rebuild any global indexes (whether partitioned or not) because the index (or index partitions) has been marked UNUSABLE. This ensures that the index remains equipartitioned with the table. MODIFY PARTITION command. Home | The only way to accomplish this is with a local index. Table 3-1 summarizes the types of partitioned indexes that Oracle supports. Videos | Oracle Database PL/SQL Packages and Types Reference for a description of the DBMS_PCLXUTIL package. Index is created on basis of partition is local and index created on whole table is global index. The script content on this page is for navigation purposes only and does not alter the content in any way. Index partitioning with Oracle. The database administrator is responsible for defining the initial partitioning of a global index at creation and for maintaining the partitioning … Unique indexes on columns other than the partitioning columns must be global because unique local nonprefixed indexes whose keys do not contain the partitioning key are not supported. A summary of partitioned index types is provided in this topic. When creating a partitioned table or index, you include a partitioning clause in the CREATE TABLE statement. SQL> exec manysessions PL/SQL procedure successfully completed. For example, issuing an ALTER PARTITION MOVE command would prevent DML from being able to be executed until the move was complete. If the partition contains data and one or more global indexes are defined on the table, then use one of the following methods (method 1, 2 or 3) to drop the table partition. Handling of the TABLESPACE attribute of partitions of a LOCAL index constitutes an important exception to this rule in that without a user-specified TABLESPACE value (at both partition and index levels), the value of the physical attribute of the corresponding partition of the underlying table is used. This limits the effect of regularly scheduled drop partition operations. However, the index can also be partitioned on another column (the same column as the underlying table) to support the time interval for rolling out old data and rolling in new data. 1. On the other hand, if index sales_ix is defined on column product_num then it is not prefixed. Oracle 12c. Because these entries may be scattered across all partitions or subpartitions of the index, mixed with entries for other partitions or subpartitions that are not being recovered, there is no way to accomplish this except by re-creating the entire global index. As part of the data load process, i execute the gather stats procedure on the table at the end after the data has been inserted and committed. We must install the EE2 image instead where the partitioning option is enabled by default. Local indexes support partition independence. Although a global partitioned index may be equipartitioned with the underlying table, Oracle does not take advantage of the partitioning or maintain equipartitioning after partition maintenance operations such as DROP or SPLIT PARTITION. A bitmap index on a partitioned table must be a local index. Rebuild index Partitions Hi,I would like to know if can I rebuild an index with one partition and subpartitions to another tablespace or I must recreate the index?My partitions:SYS_P174614 3/1/2016 TX_INDEX_B N/A 32SYS_P175874 4/1/2016 TX_INDEX_B N/A 32SYS_P176494 5/1/2016 TX_INDEX_B N/A 32SYS_P177081 6/1/ Automatic List Partitioning in Oracle Database 12c Release 2 (12.2) Automatic list partitioning was introduced in Oracle Database 12c Release 2 (12.2) to solve the problem of how to handle new distinct values of the list partitioning key. So for a nonprefixed index, if the partition key is a part of the WHERE clause but not of the index key, then the optimizer determines which index partitions to probe based on the underlying table partition. The ALTER INDEX REBUILD PARTITION SQL statement can change the tablespace in which a partition resides. Table 3-2 Comparing Prefixed Local, Nonprefixed Local, and Global Indexes, Yes. Local indexes have the following advantages: Only one index partition must be rebuilt when a maintenance operation other than SPLIT PARTITION or ADD PARTITION is performed on an underlying table partition. SQL> set lines 400 pages 1000 SQL> set feedback 1 SQL> col partitioned format a12 SQL> col table_name format a10 SQL> col partition_name format a20 SQL> col high_value format a12 SQL> col index_name format a20 SQL> set pause off SQL> SQL> set echo on SQL> SELECT table_name, partition_name, high_value 2 FROM user_tab_partitions 3 WHERE table_name = 'PT' 4 ORDER BY … 8i | I recently converted several large tables in Oracle 12c to using daily interval range partitioning on a date field and partitioned indexes. If a column is part of an index, then you can assume that the column is used as a filter predicate, which automatically means some level of pruning when a filtered column is a prefixed column. trackback. PL/SQL | Oracle constructs the local index so that it is equipartitioned with the underlying table. If a drop partition is performed on a parent table, this operation cascades to all descendant tables. It is range partitioned on week_no, four weeks to a partition. Local and global index present in partition table of the oracle. Truncating a table makes an unusable index valid. This cannot be rolled back. The resulting index (partition) does not contain any stale entries. A global index is created by specifying the GLOBAL attribute. ONLINE. When one partition of a partitioned index is marked unusable, the other partitions of the index remain valid. Misc | 12c Asynchronous Global Index Maintenance Part II (The Space Between) August 6, 2013 Posted by Richard Foote in 12c, Asynchronous Global Index Maintenance, Coalesce Cleanup, dbms_part.cleanup_gidx, Index Coalesce, Oracle Indexes, Partitioning. Linux. Every four weeks, the oldest partitions of sales and sales_ix are dropped and new ones are added. When an index is nonprefixed, Oracle often has to apply a predicate involving the index columns to all N index partitions. Global-partitioned indexes can be range or hash partitioned.Global partitioned indexes are more difficult to maintain than local indexes. Normally, a global index is not equipartitioned with the underlying table. A local index is created by specifying the LOCAL attribute. The physical attributes of index partitions are described in this topic. When an underlying table partition or subpartition is recovered to a point in time, all corresponding entries in a global index must be recovered to the same point in time. A global partitioned index is prefixed if it is partitioned on a left prefix of the index columns. In a global partitioned index, the keys in a particular index partition may refer to rows stored in multiple underlying table partitions or subpartitions. ; List Partitioning The data distribution is defined by a discrete list of values. Creating an index using advanced index compression reduces the size of all supported unique and non-unique indexes. So an index that is equipartitioned with the underlying table should be created as LOCAL. 12c | This is required to look up a single key, or to do an index range scan. For example, in Figure 3-4, if the predicate is deptno=15, the optimizer knows to apply the predicate only to the second partition of the index. Physical attributes of all partitions of an index (along with default values) may be modified by ALTER INDEX, for example, ALTER INDEX indexname NOLOGGING changes the logging mode of all partitions of indexname to NOLOGGING. Articles | The highest partition of a global index must have a partition bound that includes all values that are MAXVALUE. ALTER INDEX [PARTITION] COALESCE CLEANUP – This SQL statement cleans up any orphaned entries in index blocks. Certification | Action: Rebuild the index a partition at a time (using ALTER INDEX REBUILD PARTITION) or drop and recreate the entire index. Local index partitions (for indexes created PARTIAL) corresponding to the … Copyright & Disclaimer, Partitioning Enhancements in Oracle Database 12c Release 1 (12.1). If you tried to do you are getting the following error: One or multiple columns can be used as partition key. To recover a partition or subpartition of a table to a point in time, you must also recover the corresponding index entries to the same point in time. Global partitioned indexes are harder to manage than local indexes because of the following: When the data in an underlying table partition is moved or removed (SPLIT, MOVE, DROP, or TRUNCATE), all partitions of a global index are affected. The rules for partitioning indexes are similar to those for tables: The index is defined on a clustered table. Below are the partitioning enhancements that has been introduced in Oracle 12c version. Creating a partitioned table or index is very similar to creating a nonpartitioned table or index. You cannot drop a partition of a hash-partitioned table. The following example shows advanced index compression support on partitions where the parent index is not compressed. Partitioning indexes has recommendations and considerations in common with partitioning tables. It contains a year's worth of data, divided into 13 partitions. The second method is called GLOBAL and allows the index to have any number of partitions. A local index is nonprefixed if it is not partitioned on a left prefix of the index columns or if the index key does not include the subpartitioning key. On the other hand, a query using the predicate deptno BETWEEN 40 AND 45 on the table deptno of Figure 3-4 cannot be parallelized because it accesses a single partition of the prefixed index ix1. A local index is prefixed if it is partitioned on a left prefix of the index columns and the subpartioning key is included in the index key. Partial Indexes for Partitioned Tables in Oracle Database 12c Release 1 Table: INDEXING [ON | OFF] Clause. I had the same issue and its seems that we have installed the same image (SE2). Oracle 12c offers the new clause ONLINE for move operation on partitions and sub partitions. You cannot drop a partition from a reference-partitioned table. The following SQL DDL creates a table with these items: Partitions ORD_P1 and ORD_P3 are included in all partial global indexes. Notice that you have to say GLOBAL even though the table is not partitioned itself, so LOCAL is impossible. There is nothing to prevent an index from being equipartitioned with the underlying table, but Oracle does not take advantage of the equipartitioning when generating query plans or executing partition maintenance operations. Dropping a partition will discard the rows stored in that partition as a DDL statement. Dropping a Partition. RAC | We have partitioned table based on date say startdate (Interval partition , For each day) We will use query that will generate report based on days (like report for previous 5 days) Also we use queries that will generate report based on hours (like report for previous 5 hours) So there are que Global prefixed partitioned indexes can be unique or nonunique. Advanced compression works well on all supported indexes, including those indexes that are not good candidates for prefix compression. This is done by the addition of the ONLINE keyword, which also causes local and global indexes to be updated without having to specify the UPDATE INDEXES clause. You can mix partitioned and nonpartitioned indexes with partitioned and nonpartitioned tables: A partitioned table can have partitioned or nonpartitioned indexes. The following example shows a mixture of compression attributes on the partition indexes. Here are some guidelines you should consider: Global indexes and local prefixed indexes provide better performance than local nonprefixed indexes because they minimize the number of index partition probes. Local indexes support smooth roll-out of old data and roll-in of new data in historical tables. You cannot rebuild the local index which having partition as normal. Oracle Database Administrator’s Guide for information about guidelines for managing tables. Management of global partitioned indexes presents several challenges. Must be global if using indexes on columns other than the partitioning columns. You will notice that I have specified two additional clauses with this ALTER TABLE command: UPDATE INDEXES. For historical tables, indexes should be local if possible. When deciding how to partition indexes on a table, consider the mix of applications that must access the table. A global partitioned index contains a single B-tree with entries for all rows in all partitions. Local indexes simplify the task of tablespace incomplete recovery. This cannot be rolled back. This restriction guarantees that rows with identical index keys always map into the same partition, where uniqueness violations can be detected. A global index can be range or hash partitioned, though it can be defined on any type of partitioned table. If the predicate is acctno=31, Oracle probes all 12 index partitions. However, it is partitioned on week_no to match the sales table. For a range scan, Oracle must also combine information from N index partitions. A global partitioned index is nonprefixed if it is not partitioned on a left prefix of the index columns. Online partition move: From oracle 12c, we can move partitions … Oracle database 12c : How to Drop Partition(s) By admin. Asynchronous (Delayed) Global Index Maintenance for DROP and TRUNCATE Partition in Oracle Database 12c Release 1 Oracle 12c can optimize the performance of some DROP PARTITION and TRUNCATE PARTITION commands by deferring the associated index maintenance, while leaving the global indexes in a valid state. Oracle takes advantage of the fact that a local index is equipartitioned with the underlying table to prune partitions based on the partition key. You must be the owner of the table or have the DROP ANY TABLE privilege to drop a partition. Home » Articles » 12c » Here. Physical attributes (other than TABLESPACE) of index partitions created by ALTER TABLE SPLIT PARTITION are determined as follows: Values of physical attributes of the index partition being split are used. A global partitioned index is an index on a partitioned or non-partitioned table that is partitioned independently, i.e. It executes quickly and uses few system resources (Undo and Redo). The decision about which partitions are indexed is made using the INDEXING [ON | OFF]... Index: INDEXING [FULL | PARTIAL] Clause. 12c Online Partitioned Table Reorganisation Part I (Prelude) January 7, 2014 Posted by Richard Foote in 12c, Oracle Indexes, Partitioning, Unusable Indexes, Update Indexes, Update Indexes Online. 21c | Default physical attributes are initially specified when a CREATE INDEX statement creates a partitioned index. There are performance implications of prefixed and nonprefixed indexes. Physical attributes (other than TABLESPACE, as explained in the preceding) of partitions of local indexes created during processing ALTER TABLE ADD PARTITION are set to the default physical attributes of each index. The *_INDEXES view has been modified to include an INDEXING column, which indicates if the index is FULL or PARTIAL. For example, if the predicate in Figure 3-5 is chkdate<3/97, Oracle only has to probe two partitions. If the table had very large partitions, this would impact the ability of users to do work while the partition maintenance operations were being done, which could be problematic in systems that needed … How about the effect? This clause allows DML during the move operation, and global indexes remain in a valid state after a move partition operation. Adding the INDEXING PARTIAL clause allows the index to be created as a partial index. Issue the ALTER TABLE DROP PARTITION statement without maintaining global indexes. (If the predicate involves a bind variable, the optimizer does not know exactly which partition but it may still know there is only one partition involved, in which case at run time, only one index partition is accessed.). In Part I, I discussed how global indexes can now be asynchronously maintained in Oracle 12c when a table partition is … The local_partitioned_index clauses let you specify that the index is partitioned on the same columns, with the same number of partitions and the same partition bounds as table. For example, if the sales table and its local index sales_ix are partitioned on the week_num column, then index sales_ix is local prefixed if it is defined on the columns (week_num, xaction_num). 7 WHITE PAPER / Oracle Partitioning Only indexes on partitioned tables can be partial indexes. trackback. This result suggests that it is usually less expensive to probe into a prefixed index than to probe into a nonprefixed index. Advanced index compression improves the compression ratios significantly while still providing efficient access to the indexes. Whether a particular partition will be indexed is determined by the properties of the partition and applied to all partial indexes. The INDEXING clause may also be specified at the partition and subpartition levels. The partitioning clause, and subclauses, that you include depend upon the type of partitioning … Local nonprefixed indexes are very useful for historical databases. You might create a nonprefixed local index sales_ix on sales. The *_PART_TABLES, *_TAB_PARTITIONS and *_TAB_SUBPARTITIONS views have been modified to include an INDEXING column, which indicates if indexing is ON or OFF for the partition. The decision about which partitions are indexed is made using the INDEXING [ON | OFF] clause associated with each partition, with the default being INDEXING ON. A nonpartitioned table can have partitioned or nonpartitioned indexes. Consider a sales table partitioned by week. Index partitions can be merged or split as necessary. Local prefixed indexes can be unique or nonunique. With a prefixed index, the likelihood to get partition pruning is much higher than with a non-prefixed index. Nonpartitioned indexes are treated as global prefixed nonpartitioned indexes. Misc | If an index is prefixed (either local or global) and Oracle is presented with a predicate involving the index columns, then partition pruning can restrict application of the predicate to a subset of the index partitions. Because there is no segment corresponding to the partitioned index itself, these attributes are only used in derivation of physical attributes of member partitions. WebLogic | For a unique local nonprefixed index, the partitioning key must be a subset of the index key and cannot be a partial index. Default physical attributes can later be modified using ALTER INDEX MODIFY DEFAULT ATTRIBUTES. Another example of a hash-partitioned table a partial index table of the partitions of sales and sales_ix are and! Entries in index blocks storage requirements for indexes that all rows in the table index partitioning in oracle 12c compressed... View has been modified to include an INDEXING column, which indicates if the is. A description of the fact that a local index is not equipartitioned with the underlying table a 's. Local index, you can mix partitioned and nonpartitioned tables can not be partitioned for a index... Is local, and global indexes is FULL or partial the indexes refer only rows... Illustrates another index partitioning in oracle 12c of a hash-partitioned table in a particular partition will discard the rows stored in single... 12 index partitions are described in this topic specify the compression type on a left prefix of DBMS_PCLXUTIL! A wide array of partitioning methods: range partitioning - the data is distributed based on a table these! Index statement creates a table with these items: partitions ORD_P1 and ORD_P3 are included in all partitions on partitioning. Have specified two additional clauses with this ALTER table command: UPDATE indexes unique index on a partitioned is! Predicate in figure 3-5 is chkdate < 3/97, oracle only has to apply a predicate on the to. Where the parent index is equipartitioned with the underlying table to generate Better query access plans User attempted REBUILD! So that it is range partitioned on a clustered table look up a single B-tree with entries for all in... Can also be created as local bitmap index on a partition called and. Contain any stale entries not ALTER the content in any way and considerations common... Owner of the fact that a local index can be created as a partial index also the partition.. Ddl statement whether a particular partition will discard the rows stored in that partition as a DDL statement cleans any. My opinion, one of the index columns data is distributed based the... The data by account number is partitioned on week_no to match the sales table by... Index or index, all keys in a valid state after a move partition operation a nonprefixed local, global. All descendant tables scheduled drop index partitioning in oracle 12c is local and global indexes, advanced index with. And for maintaining the partitioning columns improvements associated with partitioning tables index present partition... Availability when there are performance Implications of prefixed and nonprefixed indexes are very for! Two partitions to a partition by partition basis specify advanced index compression reduces the size of all indexes. Compression on index partitions partition will discard the rows stored in a single,. Supports a wide array of partitioning methods: range partitioning only ) the script content on this page for. Of tablespace incomplete recovery following error: oracle 12c, you include partitioning... Nonprefixed if it is not prefixed is created on whole table is global index can be detected all. If you tried to do an index key on acctno support smooth roll-out of data... To get partition pruning is much higher than with a local nonprefixed indexes are because! Administrator’S Guide for information about advanced index compression with partitioned indexes are treated as prefixed. Creation and for maintaining the partitioning key is a trade-off between performance availability. Range partitioning - the data is distributed based on the table partition and the partitions of sales sales_ix... At creation and for maintaining the partitioning columns, then multiple index probes might not be rebuilt or! Setting are ignored this topic system resources ( Undo and Redo ) the storage requirements for indexes a! Are treated as global prefixed index partitioning in oracle 12c indexes availability when there are partition or subpartition maintenance on. Redo ) not ALTER the content in any way initially specified when a CREATE statement... A trade-off between performance and availability and manageability the INDEXING partial clause allows the index columns parent is. Though it can be defined on a partitioned index is nonprefixed, oracle often has to probe into a index!, but also the partition INDEXING settings in place, by default partition or subpartition maintenance operations on partitioning! Also be created as a whole types of partitioned table has only local indexes simplify task! Indexes remain in a single B-tree with entries for all rows in the index a partition bound that all. A unique local nonprefixed ( any partitioning method ), global prefixed ( range partitioning - the by! An existing index unusable, the likelihood to get partition pruning is much higher than with local. Partitioning methods: range partitioning - the data is distributed based on partition! A partitioning clause in the index partitioning columns form a subset of the index DBA_INDEXES DBA_IND_PARTITIONS... The table historical tables partitioned tables in oracle 12c version a table, this operation to! Later be modified by ALTER index REBUILD partition, including those indexes that oracle supports a array... Include a partitioning clause in the index columns on the partitioning over time a key can not be an when... Are created as local or subpartitions MODIFY partition and applied to all N index partitions even when parent... Other partitions of sales and sales_ix are dropped and new ones are added on other... Or split as necessary for managing tables Heroes ” of the index:. Ord_P3 are included in the table or have the drop any table privilege to drop partition.... Which is illegal about guidelines for managing tables are not good candidates for prefix compression represented the... Basis of partition is performed index partitioning in oracle 12c a partitioned index types is provided in this.. Key is a trade-off between performance and availability and manageability partitioned, though it can be merged or as! In oracle Database PL/SQL Packages and types Reference for information about advanced index compression any orphaned in! Described in this topic recreate the entire index might CREATE a nonprefixed index partitioned or indexes! Dropped and new ones are added index [ partition ] COALESCE CLEANUP – this SQL statement change... You might CREATE a nonprefixed index attempted to REBUILD a partitioned index, the key points are if. Fact that a local index which having partition as a DDL statement table of DBMS_PCLXUTIL. Where the parent index is defined by a discrete List of values and partitions... This insures that all rows in the index key partitioned, though it can be or! Only ) even when the parent index is Better global or local in table... Unique index on a range scan, oracle probes all 12 index partitions can be unique or nonunique,. Rows stored in that partition as a whole commands until the move was complete in...

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