Chapter 12 DBMS-Specific Features

Teradata extended attributes

The following extended attributes are defined by default in the Teradata DBMS.

Abstract data types

The following extended attributes are available on the Teradata tab if the type is distinct (vV2R6 and higher):

Name Description
Predefined data type Indicates that character column comparison uses character case (upper and lower) to raise differences.

Scripting name: PredefinedDataType

Abstract data type procedures

The following extended attributes are available on the Teradata tab if the type is distinct (vV2R6 and higher):

Name Description
Return data type Specifies the name of the data type returned by the method, which can be either a predefined data type or a UDT.

Scripting name: ReturnDataType
Self as result Specifies that the method is type-preserving. If so, then the data type specified in the RETURNS clause for the method must have the same name as UDT_name.

Scripting name: SelfAsResult
As locator Specifies that BLOB and CLOB types must be represented by a locator. The Teradata Database does not support in-memory LOB parameters: an AS LOCATOR phrase must be specified for each LOB parameter and return value.

Scripting name: ReturnAsLocator
Character set Specifies the CHARACTER SET clause for character data type.

Scripting name: ReturnCharSet
Cast data type Specifies a computed attribute that show the datatype and its length and precision.

Scripting name: CastDataTypeDisplay
As locator Specifies that BLOB and CLOB types must be represented by a locator.

Scripting name: CastAsLocator
Specific method name Specifies the specific name of the method whose signature is being added to the type definition for UDT_name.

Scripting name: SpecificMethodName
Parameter style Specifies the parameter style for the method defined by this signature.

Scripting name: ParameterStyle
Returns null on null input Specifies that the method defined by this signature is not called if any of the arguments passed to it is null. Instead, it returns a null.

Scripting name: ReturnsNullOnNullInput
Deterministic Specifies that the result of invoking the method defined by this signature is deterministic.

Scripting name: Deterministic
Language Specifies the language (either C or C++) used to write the source code for the method defined by this signature.

Scripting name: Language

Columns

The following extended attributes are available on the Teradata tab (vV2R6 and higher):

Name Description
Case specific Specifies that character column comparison is case-sensitive.

Scripting name: CaseSpecific
Character set Specifies the character set to be used.

Scripting name: CharacterSet
System generated only Specifies that identity column values are always system-generated. You cannot insert values into, nor update, an identity column defined as GENERATED ALWAYS.

If not selected, identity column values are system-generated unless the user does not enter a non-null value.

Scripting name: ExtGenAlways
Compressed values Compresses specified values and nulls in one or more columns of a table to zero space. When the data in a column matches a value specified in the COMPRESS phrase, then that value is stored only once in the table header regardless of how many times it occurs as a field value for the column, thus saving disk storage space.

Attribute must be enclosed in parenthesis when it is composed of multiple values.

Scripting name: Compress

Databases

The following extended attributes are available on the Teradata tab (vV2R6 and higher):

Name Description
Account Specifies the account ID identifiers.

Scripting name: Account
After journal Specifies the type of image to be maintained by default for data tables created in the new database.

Scripting name: AfterJournal
Default journal table Specifies the default table that is to receive the journal images of data tables created in the new database.

Scripting name: DefaultJournalTable
Fallback Specifies whether to create and store a duplicate copy of each table created in the new database.

Scripting name: Fallback
Owning database Specifies the name of the immediate owning user or database. The default is the user name associated with the current session.

Scripting name: FromDatabaseName
Journal Specifies the number of before change images to be maintained by default for each data table created in the new database.

Scripting name: Journal
Permanent space Specifies the number of bytes to be reserved for permanent storage of the new user database. The space is taken from unallocated space in the database of the immediate owner.

Scripting name: PermanentSpace
Spool space Specifies the number of bytes (n) to be allocated for spool files. The default is the largest value that is not greater then the owner spool space, and that is a multiple of the number of AMPs on the system.

Scripting name: SpoolSpace
Temporary space Specifies how much space (in bytes) is to be allocated for creating temporary tables by this user. Note that temporary space is reserved prior to spool space for any user defined with this characteristic.

Scripting name: TemporarySpace

Indexes

The following extended attributes are available on the Teradata tab:

Name Description
Primary Index Specifies that the index is the primary index.

Scripting name: PrimaryIndex
All Specifies that a NUSI should retain row ID pointers for each logical row of a join index (as opposed to only the compressed physical rows).

Scripting name: AllIndex
Index has name Specifies that the index will be generated with its name (as Teradata allows index with no name).

Scripting name: NamedIndex

Tables

The following extended attributes are available on the Teradata tab (vV2R6 and higher):

Name Description
On commit action Specifies the action to take with the contents of a global temporary table when a transaction ends:

  • DELETE ROWS - clears the temporary table of all rows.
  • PRESERVE ROWS - retains the rows in the table after the transaction is committed.


Scripting name: CommitRowAction
Type Specifies whether the table to be created is a global temporary table or a volatile table:

  • GLOBAL TEMPORARY - a temporary table definition is created and stored in the data dictionary for future materialization. You can create global temporary tables by copying a table WITH NO DATA, but not by copying a table WITH DATA.
  • VOLATILE - specifies that a volatile table be created, with its definition retained in memory only for the course of the session in which it is defined.


Scripting name: GlobalTemporary
Duplicate row control Controls the treatment of duplicate rows. If there are uniqueness constraints on any column or set of columns in the table definition, then the table cannot have duplicate rows even if it is declared as MULTISET. Some client utilities have restrictions with respect to MULTISET tables.

Scripting name: SetOrMultiset

Users

The following extended attributes are available on the Teradata tab :

Name Description
Owner Specifies the database (or user) that owns the current user.

Scripting name: DBOwner
Permanent Specifies the number of bytes to be reserved for permanent storage of the new user database. The space is taken from unallocated space in the database of the immediate owner.

Scripting name: PermanentSpace
Spool Specifies the number of bytes (n) to be allocated for spool files. The default is the largest value that is not greater then the owner spool space, and that is a multiple of the number of AMPs on the system.

Scripting name: SpoolSpace
Temporary Specifies how much space (in bytes) is to be allocated for creating temporary tables by this user. Note that temporary space is reserved prior to spool space for any user defined with this characteristic.

Scripting name: TemporarySpace
Account Specifies the account ID identifiers.

Scripting name: Account
Fallback Specifies whether to create and store a duplicate copy of each table created in the new database.

Scripting name: Fallback
Journal Specifies the number of before change images to be maintained by default for each data table created in the new database.

Scripting name: Journal
After journal Specifies the type of image to be maintained by default for data tables created in the new database.

Scripting name: AfterJournal
Default table Specifies the default table that is to receive the journal images of data tables created in the new database.

Scripting name: DefaultJournalTable
Database Specifies the default database name.

Scripting name: DefaultDatabase
Role Specifies the default role for the user.

Scripting name: DefaultRole
Character set Specifies the default character data type.

Scripting name: DefaultCharacterSet
Collation Specifies the default collation for this user.

Scripting name: Collation
Time zone Specifies the default time zone displacement for the user.

Scripting name: TimeZone
Date format Specifies the default format for importing and exporting DATE values for the user.

Scripting name: DateForm
Profile name Specifies a profile to the user.

Scripting name: Profile
Startup string Specifies a startup string.

Scripting name: Startup

Views

The following extended attributes are available on the Teradata tab (vV2R6 and higher):

Name Description
Lock type Specifies the type of lock to be placed.

Scripting name: LockType
Locked object class Specifies the type (class) of the object to be locked.

Scripting name: LockedClass
Locked object Specifies the name of the object to be locked.

Scripting name: LockedObjt
No wait Specifies that if the indicated lock cannot be obtained, the statement should be aborted.

Scripting name: NoWait

 

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