- Pl Sql Insert And Reference Key Generated Always Lyrics
- Pl Sql Insert And Reference Key Generated Always Working
Prerequisites
For you to insert rows into a table, the table must be in your own schema or you must have the
INSERT
object privilege on the table.Hello Tom, I have one table Invoice which has 6 columns.Out of which 2 column are composite primary key. Create table invoice ( area integer, invoid number generated always as identity, designation varchar (20), dateinv date, discounttot number (5,2), costtot number (12,2) ); alter table invoice add constraint tpk primary key ( Area, Invoid ). Virtual columns and 11g partitioning. However, the concept of virtual columns has the nice side effect of assisting in streamlining partitioning. For example, assume that we have a table that is partitioned by year-month (i.e. With 11g virtual columns, we can simply compute the partition key virtually, using a DATE column. In this instance, the document we're after is the PL/SQL User's Guide and Reference Release 2 (9.2), and in particular, the sections on PL/SQL Collections and Records, Managing Cursors., Bulk Binds and the FORALL statement.
For you to insert rows into the base table of a view, the owner of the schema containing the view must have the
INSERT
object privilege on the base table. Also, if the view is in a schema other than your own, then you must have the INSERT
object privilege on the view.If you have the
INSERT
ANY
TABLE
system privilege, then you can also insert rows into any table or the base table of any view.You must also have the
READ
or SELECT
object privilege on the table into which you want to insert rows if the table is on a remote database.Conventional and Direct-Path INSERT
You can use the
INSERT
statement to insert data into a table, partition, or view in two ways: conventional INSERT
and direct-path INSERT
. When you issue a conventional INSERT
statement, Oracle Database reuses free space in the table into which you are inserting and maintains referential integrity constraints. With direct-path INSERT
, the database appends the inserted data after existing data in the table. Data is written directly into data files, bypassing the buffer cache. Free space in the existing data is not reused. This alternative enhances performance during insert operations and is similar to the functionality of the Oracle direct-path loader utility, SQL*Loader. When you insert into a table that has been created in parallel mode, direct-path INSERT
is the default.The manner in which the database generates redo and undo data depends in part on whether you are using conventional or direct-path
INSERT
:Pl Sql Insert And Reference Key Generated Always Lyrics
- Conventional
INSERT
always generates maximal redo and undo for changes to both data and metadata, regardless of the logging setting of the table and the archivelog and force logging settings of the database. - Direct-path
INSERT
generates both redo and undo for metadata changes, because these are needed for operation recovery. For data changes, undo and redo are generated as follows:- Direct-path
INSERT
always bypasses undo generation for data changes. - If the database is not in
ARCHIVELOG
orFORCE
LOGGING
mode, then no redo is generated for data changes, regardless of the logging setting of the table. - If the database is in
ARCHIVELOG
mode (but not inFORCE
LOGGING
mode), then direct-pathINSERT
generates data redo forLOGGING
tables but not forNOLOGGING
tables. - If the database is in
ARCHIVELOG
andFORCE
LOGGING
mode, then direct-path SQL generate data redo for bothLOGGING
andNOLOGGING
tables.
Direct-path
INSERT
is subject to a number of restrictions. If any of these restrictions is violated, then Oracle Database executes conventional INSERT
serially without returning any message, unless otherwise noted:- You can have multiple direct-path
INSERT
statements in a single transaction, with or without other DML statements. However, after one DML statement alters a particular table, partition, or index, no other DML statement in the transaction can access that table, partition, or index. - Queries that access the same table, partition, or index are allowed before the direct-path
INSERT
statement, but not after it. - If any serial or parallel statement attempts to access a table that has already been modified by a direct-path
INSERT
in the same transaction, then the database returns an error and rejects the statement. - The target table cannot be of a cluster.
- The target table cannot contain object type columns.
- Direct-path
INSERT
is not supported for an index-organized table (IOT) if it has a mapping table, or if it is reference by a materialized view. - Direct-path
INSERT
into a single partition of an index-organized table (IOT), into a partitioned IOT with only one partition, or into an IOT that is not partitioned, will be done serially, even if the IOT was created in parallel mode or you specify theAPPEND
orAPPEND_VALUES
hint. However, direct-pathINSERT
operations into a partitioned IOT will honor parallel mode as long as the partition-extended name is not used and the IOT has more than one partition. - The target table cannot have any triggers or referential integrity constraints defined on it.
- The target table cannot be replicated.
- A transaction containing a direct-path
INSERT
statement cannot be or become distributed.
Pl Sql Insert And Reference Key Generated Always Working
You cannot query or modify direct-path inserted data immediately after the insert is complete. If you attempt to do so, an
ORA-12838
error is generated. You must first issue a COMMIT
statement before attempting to read or modify the newly-inserted data.See Also:
- Oracle Database Administrator's Guide for a more complete description of direct-path
INSERT
- Oracle Database Utilities for information on SQL*Loader
- Oracle Database SQL Tuning Guide for information on statistics gathering when inserting into an empty table using direct-path
INSERT