![Selecting Information about Created Objects
DBC.Children[X] Hierarchical relationship information.
DBC.Databases[X] Database, user and immediate parent information.
DBC.Users Similar to Databases view, but includes columns specific to users.
DBC.Tables[X] Tables, views, macros, triggers, and stored procedures information.
DBC. ShowTblChecks Database table constraint information.
DBC.ShowColChecks Database column constraint information.
DBC.Columns[X] Information about columns in tables and views, and parameters in macros.
DBC.Indices[X] Table index information.
DBC.IndexConstraints (V2R5) - Provides information about index constraints, e.g., PPI definition.
DBC.AllTempTables Information about all global temporary tables materialized in the system.
DBC.Triggers Information about event-driven, specialized procedures attached to a single
table and stored in the database.](https://image.slidesharecdn.com/1-220726024722-1adf6251/85/1-1-Intro-to-WinDDI-pdf-2-320.jpg)
1.1 Intro to WinDDI.pdf
- 1. Data Dictionary / Directory DBC Sys_Calendar SysAdmin SystemFE Crashdumps SYSDBA Data Dictionary / Directory Tables Object definitions System event logs System message table Journals and Restart control tables Accounting information Access control tables Views of DD/D Tables Administrative Security Supervisory End User Operational Macros Add calculation sequence Generate utilization reports Reset accounting values Authorize secured functions
- 2. Selecting Information about Created Objects DBC.Children[X] Hierarchical relationship information. DBC.Databases[X] Database, user and immediate parent information. DBC.Users Similar to Databases view, but includes columns specific to users. DBC.Tables[X] Tables, views, macros, triggers, and stored procedures information. DBC. ShowTblChecks Database table constraint information. DBC.ShowColChecks Database column constraint information. DBC.Columns[X] Information about columns in tables and views, and parameters in macros. DBC.Indices[X] Table index information. DBC.IndexConstraints (V2R5) - Provides information about index constraints, e.g., PPI definition. DBC.AllTempTables Information about all global temporary tables materialized in the system. DBC.Triggers Information about event-driven, specialized procedures attached to a single table and stored in the database.
- 3. Teradata Administrator List Columns of a View Appendix E of this manual contains a listing of all the DD/D views and columns for Teradata V2R5.1. Teradata Administrator can be used to list the columns of DD/D views (and tables).
- 4. Teradata Administrator Object Options Teradata Administrator can also be used to display object details. For example, right- click on the object (e.g., Department table) and a menu of options is displayed. In this example, the Indexes option was selected.
- 5. Creating New Users and Databases Human_Resources Accounting DBC SYSDBA PR01 PR02 PR03 BF01 BF02 BF03 Personnel Benefits You can grant CREATE DATABASE authority to any user. The user may then create other users and databases from: • The user’s own space, or • The space of another user or database (if authorized).
- 6. CREATE DATABASE Statement CREATE DATABASE database_name AS A CD FROM db_name , A PERMANENT = n PERM BYTES ; SPOOL = n TEMPORARY = n BYTES BYTES ACCOUNT = 'account_id' FALLBACK NO PROTECTION JOURNAL AFTER JOURNAL NO BEFORE NO DUAL DUAL LOCAL NOT LOCAL DEFAULT JOURNAL TABLE = table_name db_name.
- 7. CREATE USER Statement CREATE USER name AS PERMANENT = n A FROM db_name PERM BYTES , , A PASSWORD = password NULL ; SPOOL = n TEMPORARY = n STARTUP = 'string;' BYTES BYTES ACCOUNT = 'account_id' FALLBACK ('acct_id', 'acct_id', …) NO PROTECTION DEFAULT DATABASE = db_name COLLATION = coll_seq DEFAULT CHARACTER SET = ch_dt JOURNAL AFTER JOURNAL NO BEFORE NO DUAL DUAL LOCAL NOT LOCAL DEFAULT JOURNAL TABLE = table_name DATEFORM = INTEGERDATE db_name. ANSIDATE NULL TIMEZONE = LOCAL DEFAULT ROLE = role_name PROFILE = profile_name quotestring NULL NULL sign NONE NULL ALL (V2R5.1)
- 8. CREATE USER and the Data Dictionary EXPLAIN CREATE USER tfact06 AS PERM = 10e6, SPOOL = 100e6, PASSWORD = secure1time; Explanation 1) First, we lock data base tfact06 for exclusive use. 2) Next, we lock a distinct DBC."pseudo table" for write on a RowHash to prevent global deadlock for DBC.DataBaseSpace. 3) We lock a distinct DBC."pseudo table" for write on a RowHash to prevent global deadlock for DBC.AccessRights. 4) We lock a distinct DBC."pseudo table" for write on a RowHash to prevent global deadlock for DBC.Parents. 5) We lock a distinct DBC."pseudo table" for write on a RowHash to prevent global deadlock for DBC.Owners. 6) We lock DBC.DataBaseSpace for write, we lock DBC.AccessRights for write, we lock DBC.Parents for write, we lock DBC.Owners for write, we lock DBC.Accounts for write on a RowHash, we lock DBC.DBase for write on a RowHash, and we lock DBC.DBase for write on a RowHash. 7) We execute the following steps in parallel. 1) We do a single-AMP ABORT test from DBC.DBase by way of the unique primary index with no residual conditions. 2) We do a single-AMP ABORT test from DBC.Roles by way of the unique primary index with no residual conditions. 3) We do a single-AMP ABORT test from DBC.DBase by way of the unique primary index. 4) We do a single-AMP ABORT test from DBC.DBase by way of the unique primary index. 5) We do an INSERT into DBC.DBase. 6) We do a single-AMP UPDATE from DBC.DBase by way of the unique primary index with no residual conditions. 7) We do a single-AMP RETRIEVE step from DBC.Parents by way of the primary index with no residual conditions into Spool 1 (all_amps), which is redistributed by hash code to all AMPs. Then we do a SORT to order Spool 1 by row hash. 8) We do an all-AMPs MERGE into DBC.Owners from Spool 1 (Last Use).
- 9. CREATE USER and the Data Dictionary (cont.) 9) We execute the following steps in parallel. 1) We do an INSERT into DBC.Owners. 2) We do a single-AMP RETRIEVE step from DBC.Parents by way of the primary index with no residual conditions into Spool 2 (all_amps), which is redistributed by hash code to all AMPs. Then we do a SORT to order Spool 2 by row hash. 10) We do an all-AMPs MERGE into DBC.Parents from Spool 2 (Last Use). 11) We execute the following steps in parallel. 1) We do an INSERT into DBC.Parents. 2) We do an INSERT into DBC.Accounts. 3) We do a single-AMP RETRIEVE step from DBC.AccessRights by way of the primary index into Spool 3 (all_amps), which is redistributed by hash code to all AMPs. 12) We execute the following steps in parallel. 1) We do a single-AMP RETRIEVE step from DBC.AccessRights by way of the primary index into Spool 3 (all_amps), which is redistributed by hash code to all AMPs. 2) We do an all-AMPs RETRIEVE step from DBC.AccessRights by way of an all-rows scan into Spool 4 (all_amps), which is redistributed by hash code to all AMPs. Then we do a SORT to order Spool 4 by row hash. 13) We do an all-AMPs JOIN step from DBC.Owners by way of a RowHash match scan, which is joined to Spool 4 (Last Use). DBC.Owners and Spool 4 are joined using a merge join. The result goes into Spool 3 (all_amps), which is redistributed by hash code to all AMPs. Then we do a SORT to order Spool 3 by row hash. 14) We do an all-AMPs MERGE into DBC.AccessRights from Spool 3 (Last Use). 15) We flush the DISKSPACE and AMPUSAGE caches. 16) We do an all-AMPs ABORT test from DBC.DataBaseSpace by way of the unique primary index. 17) We do an INSERT into DBC.DataBaseSpace. 18) We do an all-AMPs UPDATE from DBC.DataBaseSpace by way of the unique primary index with no residual conditions. 19) We flush the DISKSPACE and AMPUSAGE caches. 20) We spoil the parser's dictionary cache for the database. 21) Finally, we send out an END TRANSACTION step to all AMPs involved in processing the request. -> No rows are returned to the user as the result of statement 1.
- 10. MODIFY USER Statement , MODIFY USER name AS ; PASSWORD = pwd RELEASE PASSWORD LOCK STARTUP = NULL NULL FOR USER 'string;' PERMANENT = n SPOOL = n TEMPORARY = n PERM BYTES BYTES BYTES ACCOUNT = 'account_id' FALLBACK COLLATION = coll_seq ('acct_id', 'acct_id', …) NO PROTECTION DEFAULT DATABASE = db_name DEFAULT CHARACTER SET = character_data_type DATEFORM = INTEGERDATE JOURNAL AFTER JOURNAL ANSIDATE NO BEFORE NO NULL DUAL DUAL LOCAL NOT LOCAL DEFAULT JOURNAL TABLE = table_name DROP DEFAULT JOURNAL TABLE db_name. =table_name TIMEZONE = LOCAL DEFAULT ROLE = role_name PROFILE = profile_name quotestring NULL NULL sign NONE NULL ALL (V2R5.1)
- 11. Teradata Administrator Tools Menu Options Teradata Administrator can be used to create and manage users and databases. Tools menu • Selections to create and modify databases and uses, grant/revoke access rights, and send ad hoc query requests to Teradata RDBMS. • Options include the ability to clone a user, move space, and set preferences. • This example illustrates how to create a database by completing the entries.
- 12. Teradata Administrator GRANT/REVOKE Rights • Select the object name and object type. • Select who is going to get the right. • Select the rights. Teradata Administrator can be used to easily grant or revoke access rights. Tools Î Grant/Revoke Î Object Rights
- 13. Teradata Administrator Rights on DB/User Right-click on the database AU and select the option. In this example, Rights on DB/User was selected. Teradata Administrator can also be used to easily view existing access rights