Oracle Database drops local index partitions corresponding to the selected partition. You cannot drop a SCOPE table constraint or a WITH ROWID constraint on a REF column. To add a partition You can add add a new partition to the \"high\" end (the point after the last existing partition). Restrictions on Moving Tables Online Moving tables online is subject to the following restrictions: You cannot combine this clause with any other clause in the same statement. We can see the data is spread across three years. If the LOB index in table resided in a different tablespace from the LOB data, then Oracle Database collocates the LOB index in the same tablespace with the LOB data after the move. If the partition or subpartition to be truncated contains data, then you must first disable any referential integrity constraints on the table. You must have the FLASHBACK ARCHIVE object privilege on the specified flashback data archive to specify this clause. Therefore, you must enable row movement for the object you want to shrink before specifying this clause. COMPRESS enables key compression, which eliminates repeated occurrence 1of primary key column values in index-organized tables. The database invalidates any indexes on heap-organized tables. In the ADD clause, use supplemental_log_grp_clause to create named supplemental log group. Instead use the drop_table_partition clause. However, the optimized behavior is subject to the following restrictions: The table cannot have any LOB columns. Specify WITHOUT VALIDATION if you do not want Oracle Database to check the proper mapping of rows in the exchanged table. If the first element of the partition bound of the high partition is maxvalue, you cannot add a partition to the table. To determine whether the table contains such columns, refer to the V80_FMT_IMAGE column of the USER_TAB_COLUMNS data dictionary view. Use SET INTERVAL () to disable interval partitioning. This clause disables the foreign key as well. However, if the parent subpartition does not have a default TABLESPACE attribute, then the new subpartitions inherit the tablespace of the corresponding new table subpartitions. ENCRYPT | DECRYPT LOB encryption has the same semantics as column encryption in general. You must then correct any errors that exist in that object before referencing it. All lobs in the segment are read, and any matching LOBs are deduplicated before returning. Only the LOBs specified are affected. All encrypted columns in the table are reencrypted using the new key and, if you specify the USING clause of the encryption_spec, a new encryption algorithm. Instead you must split the DEFAULT partition using the split_list_subpartition clause. Use the REKEY clause to generate a new encryption key or to switch between different algorithms. Use this clause to instruct Oracle Database whether to compress data segments to reduce disk and memory use. Refer to the CREATE TABLE clause LOB_partition_storage for full information on this clause, including restrictions. Subsequent queries, however, are executed in parallel. Specify the new noninclusive upper bound for the first of the two new subpartitions. collection_item Specify the name of a column-qualified attribute whose type is nested table or varray. CACHE READS Clause When you add a new LOB column, you can specify the logging attribute with CACHE READS, as you can when defining a LOB column at create time. Refer to the mapping_table_clauses (in CREATE TABLE) for more information on this clause. If a bitmap join index is defined on table, then any operation that alters a partition of table causes Oracle Database to mark the index UNUSABLE. UNUSABLE indexes are left unusable, and INVALID global indexes are ignored. You cannot specify both the PCTVERSION and RETENTION parameters. When exchanging partitioned index-organized tables: The source and target table or partition must have their primary key set on the same columns, in the same order. The modified LOB column inherits all constraints and triggers that were defined on the original LONG column. This creates a table partitioned by ranges, in this example on order values. The new index subpartitions inherit physical attributes from the parent subpartition. The table must be in your own schema, or you must have ALTER object privilege on the table, or you must have ALTER ANY TABLE system privilege. The merge_table_partitions clause lets you merge the contents of two range partitions or two list partitions of table into one new partition and then drop the original two partitions. Oracle Database does not fire a disabled trigger even if the triggering condition is satisfied. Collection Retrieval: Example The following statement modifies nested table column ad_textdocs_ntab in the sample table sh.print_media so that when queried it returns actual values instead of locators: Specifying Parallel Processing: Example The following statement specifies parallel processing for queries to the sample table oe.customers: Changing the State of a Constraint: Examples The following statement places in ENABLE VALIDATE state an integrity constraint named emp_manager_fk in the employees table: Each row of the employees table must satisfy the constraint for Oracle Database to enable the constraint. You can update indexes on table during this operation using the update_index_clauses. After a column has been marked UNUSED, you have no access to that column. It lets you instruct Oracle Database to convert the metadata of the target table to conform with the latest version of each referenced type. You cannot specify tablespace storage for the overflow segment using this clause. deallocate_unused_clause Specify the deallocate_unused_clause to deallocate unused space at the end of the mapping table of the index-organized table. Notes on Exchanging Partitions and Subpartitions The following notes apply when exchanging partitions and subpartitions: Both tables involved in the exchange must have the same primary key, and no validated foreign keys can be referencing either of the tables unless the referenced table is empty. You need not specify the name of the partitions, but you must specify their attributes in the order in which they were created. (You would have to convert the LONG column in print_media to LOB before partitioning the table.) The add_hash_subpartition clause lets you add a hash subpartition to partition. LOB items not specified in this clause are not moved. Restrictions on Nested Table Column Properties Nested table column properties are subject to the following restrictions: You cannot specify CLUSTER as part of the physical_properties clause. See the alter_mapping_table_clauses . Use the ADD VALUES clause to extend the partition_value list of subpartition to include additional values. Use the RENAME clause to rename table to new_table_name. The database invalidates any global indexes on heap-organized tables. Restriction on Updating Global Indexes If the global index is a global domain index defined on a LOB column, then Oracle Database marks the domain index UNUSABLE instead of updating it. If it does exist, then the database moves the mapping table along with the index-organized table, and marks any bitmapped indexes UNUSABLE. VALUES Clause The VALUES clause is valid only for list subpartitions. You cannot combine partition operations with other partition operations or with operations on the base table in the same ALTER TABLE statement. If table is index organized, then Oracle Database assigns the same name to the corresponding primary key index partition as well as to any existing overflow partitions and mapping table partitions. KEEP_DUPLICATES disables LOB deduplication. If you want to specify separate physical attributes for one or more partitions, then you must specify such attributes for every partition in the table. In this case, Oracle Database enables the constraints only if both are satisfied by each row in the table. You can update these indexes during this operation using the update_index_clauses. List partitions and system partitions need not be adjacent in order to be merged. Restrictions on Renaming Columns Renaming columns is subject to the following restrictions: You cannot combine this clause with any of the other column_clauses in the same statement. Index-organized tables keep data sorted on the primary key and are therefore best suited for primary-key-based access and manipulation.See index_org_table_clause in the context of CREATE TABLE. FREEPOOLS integer For BasicFile LOBs, if the database is in automatic undo mode, then you can use this clause to specify the number of freelist groups for this LOB. You can specify a name for the partition, and optionally a tablespace where it should be stored. Dependent views, triggers, functions, procedures, and packages are invalidated. Omit tablespace storage at the partition level and specify tablespace storage in the subpartition template. Restrictions on Default Column Values Default column values are subject to the following restrictions: A DEFAULT expression cannot contain references to other columns, the pseudocolumns CURRVAL, NEXTVAL, LEVEL, and ROWNUM, or date constants that are not fully specified. You must move individual partitions or subpartitions. Both the source and target must have identical storage attributes for any LOB columns. However, you can import a table only if all the columns specified in the export files are present in the table (none of those columns has been dropped or marked unused). Rowid materialized views must be rebuilt after the shrink operation. However, subsequent queries that specify the new column are rewritten so that the default value is returned in the result set. To use the flashback_archive_clause to disable historical tracking for the table, you must have the FLASHBACK ARCHIVE ADMINSTER system privilege or you must be logged in as SYSDBA. Therefore, be sure to refresh all dependent materialized views before performing any of these operations. Oracle Database marks UNUSABLE all corresponding bitmap index partitions. Use the update_index_clauses to update the indexes on table as part of the table partitioning operation. If you do not specify TABLESPACE at the table level, then the database uses the tablespace of the partition primary key index segment. See "ENCRYPT encryption_spec | DECRYPT" for more information. Refer to the CREATE TABLE clause encryption_spec for additional information and restrictions on the encryption_spec. In fact, partition advisor is a part of the SQL Access Advisor in oracle 11g. Otherwise, this clause has the same semantics in CREATE TABLE and ALTER TABLE statements. alter_XMLSchemas_clause This clause is valid within modify_col_properties only for XMLType tables. The column being added cannot be encrypted, and cannot be an object column, nested table column, or a LOB column. For example, the following statements are not allowed: You can drop an object type column only as an entity. The database does not readjust the high water mark and does not release the space immediately. 2) Online operation You can update these indexes by using the update_index_clauses. REUSE STORAGE Specify REUSE STORAGE to keep space from the deleted rows allocated to the partition or subpartition. Please refer to Oracle Database VLDB and Partitioning Guide for a discussion of these restrictions. Restrictions on Adding Range Partitions Adding range partitions is subject to the following restrictions: If the upper partition bound of each partitioning key in the existing high partition is MAXVALUE, then you cannot add a partition to the table. Restriction on Allocating Table Extents You cannot allocate an extent for a temporary table or for a range- or composite-partitioned table. However, all clauses of the drop_column_clause are valid for tables compressed for all operations. You can reduce the size of a datatype of a column as long as the change does not require data to be modified.The database scans existing data and returns an error if data exists that exceeds the new length limit. For complete information on these clauses, refer to row_movement_clause in the documentation on CREATE TABLE. Oracle Database splits the corresponding partition in each local index defined on table, even if the index is marked UNUSABLE. If they are range subpartitions, then they must be adjacent. If that index partition has no default tablespace, then the database uses the tablespace of the new underlying table partitions. If table is the parent table of a reference-partitioned table, then you can use the dependent_tables_clause to propagate the partition maintenance operation you are specifying in this statement to all the reference-partitioned child tables. You cannot specify FLASHBACK ARCHIVE to change the flashback data archive for this table. Oracle Database Reference for information on the data dictionary views, ALTER TYPE for information on converting dependent table data when modifying a type upon which the table depends. Answer: Use ALTER TABLE ADD PARTITION to add a partition to the high end of the table after the last existing partition. Oracle Database drops local index partitions corresponding to the selected partition. Global indexes defined on table are not affected. This clause is valid only for composite-partitioned tables. For complete information on these clauses, refer to "CACHE | NOCACHE | CACHE READS" in the documentation on CREATE TABLE. mapping_table_clause Specify MAPPING TABLE if you want Oracle Database to create a mapping table if one does not already exist. Restriction on Mapping Tables You cannot specify NOMAPPING if any bitmapped indexes have been defined on table. Specify the subpartition values you want to include in the first of the two new subpartitions. RETURN AS Specify what Oracle Database should return as the result of a query: LOCATOR specifies that a unique locator for the nested table is returned. Instead, use the split_table_partition clause to add a partition at the beginning or the middle of the table. This clause is valid as part of alter_table_properties only if you are modifying an XMLType table. alter index ix_my_tab add partition xxx tablespace newidxtbs; alter table store_sales add partition sales_q1_04 values less than yyy tablespace zzz; alter table … Oracle Database creates the first new subpartition using the subpartition value list you specify and creates the second new partition using the remaining partition values from the current subpartition. Use the parallel_clause to specify whether to parallelize the creation of the new partition. DEDUPLICATE enables LOB deduplication. list_partitions of CREATE TABLE for more information and restrictions on list partitions, "Working with Default List Partitions: Example". Local and global indexes on the table are not affected by either of these clauses. The values of any unspecified attributes are inherited from the table-level values. The following statement disables the primary key of the locations table: The unique key in the locations table is referenced by the foreign key in the departments table, so you must specify CASCADE to disable the primary key. When you specify this clause, Oracle Database checks to ensure that no rows with this value exist. Note that NULL values are treated as greater than all other values except MAXVALUE. If integer is greater than the number of rows in the table, then the database applies a checkpoint after all the rows have been processed. Use this clause to update global indexes on table. To enable a single trigger, use the enable_clause of ALTER TRIGGER. If varray_item is a multilevel collection, then the database stores all collection items nested within varray_item in the same LOB in which varray_item is stored. Refer to allocate_extent_clause for a full description of this clause. Specify the schema containing the table. If you specify the allocate_extent_clause, then Oracle Database allocates an extent for each subpartition of partition. Restriction on Coalescing Table Partitions If you update global indexes using the update_all_indexes_clause, then you can specify only the keywords UPDATE INDEXES, not the subclause. You can drop a column from an index-organized table only if it is not a primary key column. You can also specify how Oracle Database should handle local indexes that become unusable as a result of the modification to the partition. WITH TABLE table Specify the table with which the partition or subpartition will be exchanged. WITH | WITHOUT VALIDATION Specify WITH VALIDATION if you want Oracle Database to return an error if any rows in the exchanged table do not map into partitions or subpartitions being exchanged. You can specify flashback_archive to designate a particular flashback data archive for this table. Use the storage table only to modify the nested table column storage characteristics. To drop an attribute from an object type column, use the ALTER TYPE ... DROP ATTRIBUTE statement with the CASCADE INCLUDING TABLE DATA clause. key_compression Use the key_compression clause to enable or disable key compression in an index-organized table. The database automatically assigns the column the same datatype as the corresponding column of the referenced key of the referential integrity constraint. The modify_table_partition clause lets you change the real physical attributes of a range, hash, list partition, or system partition. The only alter_table_partitioning clauses you can specify for a reference-partitioned table are modify_table_default_attrs, move_table_[sub]partition, truncate_partition_subpart, and exchange_partition_subpart. Restrictions on Modifying Column Properties The modification of column properties is subject to the following restrictions: You cannot change the datatype of a LOB column. The database converts existing interval partitions to range partitions, using the higher boundaries of created interval partitions as upper boundaries for the range partitions to be created. Refer to alter_XMLSchemas_clause for more information. The enable_disable_clause (in CREATE TABLE) for a complete description of this clause, including notes and restrictions that relate to this statement, "Using Indexes to Enforce Constraints" for information on using indexes to enforce constraints. When you merge two composite range partitions or two composite list partitions, range-list or list-list composite partitions, you cannot specify subpartition descriptions. However, for an external table you cannot: Add a LONG, LOB, or object type column or change the datatype of an external table column to any of these datatypes. Restrictions on Dropping Table Partitions Dropping table partitions is subject to the following restrictions: You cannot drop a partition of a hash-partitioned table. The answer to this is in another partitioning enhancement in Oracle 11g, where you can refer to a partition by the range that it covers, like this: SQL> ALTER TABLE INTERVAL_SALES DROP PARTITION FOR (TO_DATE('3-3-2004','DD-MM-YYYY')); Table altered. If the subpartition is not empty, then Oracle Database marks UNUSABLE all local index subpartitions corresponding to the subpartition being moved. The space is subsequently available only for inserts and updates to the same partition or subpartition. An existing RANGE partitioned table can easily be changed to be INTERVAL partitioned with the SET INTERVAL command. You cannot add a LONG, varray, or object type column to an external table, nor can you change the datatype of an external table column to any of these datatypes. Any other attributes changed in this clause will be changed in subpartitions of partition as well, overriding existing values. Using this clause invalidates any dependent materialized views. Instead use the MODIFY PARTITION ... COALESCE SUBPARTITION syntax. These two clauses modify the attributes of local index partitions and index subpartitions corresponding to partition, depending on whether you are modifying a partition or subpartition. When you rename a column, Oracle Database handles dependent objects as follows: Function-based indexes and check constraints that depend on the renamed column remain valid. You can define the storage for any new column while upgrading the table by using the column_properties and the LOB_partition_storage . Further, you cannot specify an integer after the COMPRESS keyword. add_list_subpartition This clause is valid only for range-list and list-list composite partitions. Specify COMPRESS to instruct Oracle Database to combine the primary key index blocks of the index-organized table where possible to free blocks for reuse. The ALTER TABLE…. You can specify only one list of LOB_partition_storage clauses in a single ALTER TABLE statement, and all LOB_storage_clauses and varray_col_properties clause must precede the list of LOB_partition_storage clauses. Restriction on Updating All Indexes You cannot specify this clause for index-organized tables. The database invalidates any indexes on heap-organized tables. This clause is valid only for exchanging partition, not subpartitions. You cannot drop a primary key constraint (even with the CASCADE clause) on a table that uses the primary key as its object identifier (OID). If you drop a referential integrity constraint on a REF column, then the REF column remains scoped to the referenced table. If table is index organized and has a mapping table defined on it, then the database drops the corresponding mapping table partition as well. LOB_storage_clause The LOB_storage_clause is permitted within modify_col_properties only if you are converting a LONG column to a LOB column. You cannot split a system partition. For a composite-partitioned index, the index_subpartition_clause lets you specify tablespace storage for each subpartition. Specify DROP to remove the column descriptor and the data associated with the target column from each row in the table. Restrictions on Splitting Table Partitions You cannot specify this clause for a hash partition. You cannot shrink a table that is the master table of an ON COMMIT materialized view. Refer to the CREATE TABLE LOB_storage_clause for complete information on this clause. None of these operations cascade to any child table of the reference-partitioned table. If you update global indexes using the update_index_clauses, then you can specify only the UPDATE INDEXES keywords but not the subclause. Compacting the segment requires row movement. You will need to repeat this between each test. All of the segment attributes of the two objects (including tablespace and logging) are also exchanged. Oracle Database automatically invalidates all dependent objects, such as views, triggers, and stored program units. Use this clause to update only global indexes on table. PRIMARY KEY Specify PRIMARY KEY to drop the primary key constraint of table. The new index subpartitions inherit the names of the new table subpartitions unless those names are already held by index subpartitions. LOB_compression_clause This clause is valid only for SecureFile LOBs. If table is index organized, then Oracle Database adds a partition to any mapping table and overflow area defined on the table as well. REBUILD FREEPOOLS This clause applies only to BasicFile LOBs, not to SecureFile LOBs. Here are the main topics for this article: Present initial situation; Create a Partitioned Interim Table; Start the Redefinition Process When adding partitions and subpartitions, bear in mind that you can specify up to a total of 1024K-1 partitions and subpartitions for each table. The new mapping table is created in the same tablespace as the parent table. Parameter values specified in this clause apply only to the overflow data segment.