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Direct Path Loads → A direct path load parses the input records according to the field specifications, converts the … takes place. Direct path load is much faster than conventional path load, but entails several … restrictions. See Also: Direct Path Load Parallel Direct
Discontinued Direct Path Loads → In a direct path load, the behavior of a discontinued load varies depending on the reason the load … error occurred. If there are multiple INTO TABLE statements in the control file, SQL*Loader loads
Conventional Path Loads, Direct Path Loads, and External Table Loads → SQL*Loader provides the following methods to load data: Conventional Path Loads Direct Path Loads External Table Loads
Data Conversion During Direct Path Loads → During a direct path load, data conversion occurs on the client side rather than on the server side
Minimizing Use of the Redo Log → … Disabling Archiving If archiving is disabled, direct path loads do not generate full image redo. Use … default, a direct path load is RECOVERABLE. The following is an example of specifying the … One way to speed a direct load dramatically is to minimize use of the redo log.
Database Insert Triggers → Table insert triggers are also disabled when a direct path load begins. After the rows are loaded … enabled. As a result, insert triggers do not fire for any rows loaded on the direct path. When using the … direct path, the application must ensure that any behavior associated with insert
Intrasegment Concurrency with Direct Path → SQL*Loader permits multiple, concurrent sessions to perform a direct path load into the same table … performance of a direct path load given the available resources on your system. This method of data loading … as a parallel direct path load. It is important to realize that parallelism
General Performance Improvement Hints → optimized if all character sets are the same. For direct path loads, it is best if the datafile … conversion buffers are not allocated. Use direct path loads. Use the SORTED INDEXES clause. Avoid … clause associated with it for every row loaded. Use parallel direct path
Conventional Path Load → fill them on each insert. Although appropriate during normal use, this can slow bulk loads dramatically. See Also: Discontinued Conventional Path Loads … Conventional path load (the default) uses the SQL INSERT statement and a bind array buffer to load … performs a conventional path load, it competes
Integrity Constraints → All integrity constraints are enforced during direct path loads, although not necessarily at the … constraints, are disabled before the direct path load and must be reenabled afterwards. If REENABLE is … error log. See Direct Loads, Integrity Constraints, and Triggers.
Using Direct Path Load → This section explains how to use the SQL*Loader direct path load method.
Specifying a Direct Path Load → Direct Path Loads for information about parameters you can use to optimize performance of direct path … loads Optimizing Direct Path Loads on Multiple-CPU Systems if you are doing a direct path load on a multiple-CPU
Specifying the Number of Column Array Rows and Size of Stream Buffers → number of column array rows and size of the steam buffer when you perform direct path loads on … multiple-CPU systems. See Optimizing Direct Path Loads on Multiple-CPU Systems for more information. … rows. Note that when VARRAY s are loaded using direct path,
Parallel Data Loading Models → time required for data loading: Concurrent conventional path loads Intersegment concurrency with the … direct path load method Intrasegment concurrency with the direct path load method
Restrictions on Parallel Direct Path Loads → The following restrictions are enforced on parallel direct path loads: Neither local nor global … stored as LOBs (such as VARRAYs). If a parallel direct path load is being applied to a single … (this is due to the individual loads not being coordinated). If you must truncate a table
Enabling Constraints After a Parallel Direct Path Load → SQL*Loader session can attempt to reenable constraints on a table after a direct path load, there is … that some constraints might not be reenabled after a direct path load, you should check the status of
11 Conventional and Direct Path Loads → Optimizing Performance of Direct Path Loads Optimizing Direct Path Loads on Multiple-CPU Systems … This chapter describes SQL*Loader's conventional and direct path load methods. The following topics … are covered: Data Loading Methods Conventional Path
Direct Path Load → with I/O increases load performance. See Also: Discontinued Direct Path Loads … statement, a direct path load uses the direct path API to pass the data to be loaded to the load engine … direct path load engine uses the column array structure
Restrictions on Using Direct Path Loads → during the load. This is because in direct path loads there is no SQL being generated to fetch the … The following conditions must be satisfied for you to use the direct path load method: Tables are … . For versions of the database prior to Oracle9 i, you can perform a SQL*Loader direct
Restrictions on a Direct Path Load of a Single Partition → In addition to the previously listed restrictions, loading a single partition has the following restrictions: The table that the partition is a member of cannot have any global indexes defined on it. Enabled referential and check constraints on the table that the partition is a member of are not allowed. Enabled triggers are not allowed.