Trusted - The session is altered to allow query rewriting. A materialized is used, provided that it is not stale. However, QueryRewrite may use trusted relationships, such as those declared by dimension objects or constraints that have not been validated. Stale Tolerated - The session is altered to allow query rewriting. The materialized view is used even when data in detail tables has changed.
Note that this property must be set before connecting since the alter sessions occur during connection. If set to true, allows you to see synonyms. The alias names appear in the table list along with the tables. Default is false.
If set to true, this property allows you to see all tables created by the DBA in the database. The system table names appear in the table list. To use arrays, select true. The default is false no arrays. This reduces some of the function call and network overhead that would occur if each record had to be sent to Oracle one at a time. Performance improvements of about four times occur with array inserts. Limitation: Array inserts make error handling difficult.
If one of the records has invalid data, such as nulls or a duplicate key, you get one error for the entire batch of records. Because of this, using reject files is not suggested when using this property. If set to true default , allows you to see views.
View names appear in the table list along with table names. Provides a pass-through mechanism where advanced users can construct the Where clause of the query themselves. It can be used as an alternative to writing a lengthy query statement. This might be used to get the Oracle server to filter the data based on a condition before it is sent to the integration platform.
This translation table determines which encoding to use for reading and writing data. The following code pages are available:. These are field lengths in your data. If you need to change field lengths, reset them in the schema. A field length shorter than the default may truncate data.
Variable-length character string having maximum length of size bytes for characters. Maximum size is bytes or characters and minimum is 1 byte or 1 character. Variable-length character string having maximum length of size characters. Maximum size is determined by the national character set definition. Number having precision p and scale s. The precision p can range from 1 to The scale s can range from to This data type requires 5 bytes, including the length byte.
This data type requires 9 bytes, including the length byte. The default is 6. Accepted values are 0 to 9. Oracle 9i. RAC Introduced. RAC Improvements. Further RAC Improvements. DataGuard enhancements. DataGuard improvements. Active DataGuard added. Oracle databases are the well famous objective-oriented database administration frameworks created and conveyed by Oracle Corporation.
The most recent variant of Oracle databases is Oracle 11g, initially discharged in September ; it succeeded Oracle 10g. These variants are a part of the proceeded with the advancement of the Oracle databases since the s. Each new form has more up to date patch sets discharge routinely, the most noteworthy of which are known as a release. A noteworthy goal of each updated rendition is to build execution and versatility over the more seasoned variant.
Along these lines, there are numerous new elements in 11g based on top of those officially accessible in 10g. These give better capacities to the database overseers DBAs to deal with their multi-layered database situations that are getting more mind boggling and bigger throughout the years. Oracle 10g was the redesigned rendition from Oracle 9i. It was an exceptionally stable form from the outset with a hefty portion of the bugs in 9i altered and with a host of new elements.
0コメント