Does alter table lock table Oracle?

Does alter table lock table Oracle?

SQL> alter table temp_payroll enable table lock; Enable table lock allowing DDL operations on the table. All currently executing statements must commit or rollbacks before oracle database enable the table lock.

Does drop table drop partitions?

The Oracle ALTER TABLE DROP PARTITION statement will also drop the corresponding Oracle partitions in each local index defined on table. The Oracle index partitions are dropped even if they are marked as unusable. You must drop the table.

Can we drop hash partition in Oracle table?

You can drop partitions from range, interval, list, or composite *-[range | list] partitioned tables. For hash partitioned tables, or hash subpartitions of composite *-hash partitioned tables, you must perform a coalesce operation instead. You cannot drop a partition from a reference-partitioned table.

How do I lock an entire table in Oracle?

Specify the name of the table or view to be locked. If you specify view , then Oracle Database locks the base tables of the view. If you specify PARTITION or SUBPARTITION , then Oracle Database first acquires an implicit lock on the table.

How do I grant a drop partition in Oracle?

A effective method to grant selective privileges is to use PLSQL to wrap the command, because PLSQL will run (by default) with the permissions of the owner of the PLSQL. execute immediate ‘alter table T drop partition ‘||p_par_name; end; grant execute on DRA.

How do I delete an existing partition in Oracle?

Use one of the following statements to drop a table partition or subpartition:

1. ALTER TABLE DROP PARTITION to drop a table partition.
2. ALTER TABLE DROP SUBPARTITION to drop a subpartition of a composite *-[range | list] partitioned table.

Can we alter partition in Oracle?

Use the ALTER TABLE MODIFY PARTITION statement to modify existing attributes of a range partition or list partition. You can modify segment attributes (except TABLESPACE ), or you can allocate and deallocate extents, mark local index partitions UNUSABLE , or rebuild local indexes that have been marked UNUSABLE .

When to drop a partition from a table?

Afterward, you must rebuild any global indexes (whether partitioned or not) because the index (or index partitions) has been marked UNUSABLE. The following statements provide an example of dropping partition dec98 from the sales table, then rebuilding its global nonpartitioned index.

When to use ALTER TABLE statement in Oracle?

Use the ALTER TABLE statement to alter the definition of a nonpartitioned table, a partitioned table, a table partition, or a table subpartition. For object tables or relational tables with object columns, use ALTER TABLE to convert the table to the latest definition of its referenced type after the type has been altered.

How to drop a table partition without global indexes?

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. Issue the ALTER TABLE DROP PARTITION statement without maintaining global indexes.

When to issue the DELETE statement in Oracle?

This behavior ensures backward compatibility. Issue the DELETE statement to delete all rows from the partition before you issue the ALTER TABLE DROP PARTITION statement. The DELETE statement updates the global indexes. For example, to drop the first partition, issue the following statements: