On Commit Preserve Rows

On Commit Preserve Rows. They will only be removed at the end of the session. The disk space is reclaimed immediately.

关于on commit preserve rows与on commit delete rows的测试 itcui 博客园
关于on commit preserve rows与on commit delete rows的测试 itcui 博客园 from www.cnblogs.com

Invoke another procedure (nested) and populate few more columns of the gtt. As per my knowledge on commit preserve rows preserves records until end of the session (my oracle knowledge is poor, my assumption could be wrong). After committing a transaction, the recordset remains active.

The Statement Commits All Changes Made By Sql Schema Statements And Sql Data Change Statements During The Unit Of Work.


If you are using nested bt statements, then on commit is applied when the et for the outermost bt is processed. On commit delete rows would mean: Source of the values for the columns in.

On Commit Preserve Rows (Cpr) With Truncate Has Several Advantages.


In fact the deletion should take place. Insert data into gtt through a pl/sql procedure. Let’s see how to preserve, empty or drop temporary tables when a transaction succeeds (commit) or fails (rollback).created temporary tables.

The Rows Of A Declared Temporary Table That Is Defined With The On Commit Preserve Rows.


Sorry i can't reproduce (i'm on 12.1.0.2) sql> create global temporary table gtt 2 ( 3 k010 number(9, 0) 4 , k020 number(10, 0) 5 , cli_bizn number(1, 0) not null 6 , cli_segm varchar2(3 byte) not null 7 ) 8 on commit preserve rows; Data is preserved if a commit (explicit or implicit say via ddl) occurs. The statement to create a global temporary table (gtt) is similar to the definition of an ordinary table with the addition of the keywords global temporary.

Create Global Temporary Table My_Temp_Table ( Id Number, Description Varchar2(20) ) On Commit Preserve Rows;


Ansi when the application issues a commit request. Some important points related to global temporary tables. In db2, temporary tables created with create global temporary table are created in the work file and their rows disappear at the end of each transaction.

Sql (Structured Query Language) (Sql) The Syntax Of Creating A Global Temporary Table And A Permanent Table Are The Same Except For The Keyword Global Temporary And The Clause On Commit [Delete Rows | Preserve Rows].


When encountering an explicit commit statement, delete all rows in the temporary table. Preserve rows rows of the table will be preserved. The commit statement ends the unit of recovery in which it is executed and a new unit of recovery is started for the process.

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