SAS/ACCESS 9.2 for Relational Databases: Reference, Fourth Edition

SAS/ACCESS Interface to DB2 Under z/OS 4 Overview 521Naming Conventions for DB2 Under z/OSFor general information about this feature, see Chapter 2, “SAS Names and Supportfor DBMS Names,” on page 11.The PRESERVE_COL_NAMES= and PRESERVE_TAB_NAMES= LIBNAME optionsdetermine how SAS/ACCESS Interface to DB2 under z/OS handles case sensitivity,spaces, and special characters. The default for both of these options is NO. AlthoughDB2 is case-sensitive, it converts table and column names to uppercase by default. Topreserve the case of the table and column names that you send to DB2, enclose them inquotation marks. For information about these options, see “Overview of the LIBNAMEStatement for Relational Databases” on page 87.DB2 objects include tables, views, columns, and indexes. They follow these namingconventions.3 These objects must have names of the following length in characters: column(1–30), index (1–18), table (1–18), view (1–18), alias (1–18), synonym (1–18), orcorrelation (1–128). However, SAS limits table names to 32 bytes. This limitationprevents database table objects that are defined through a DATA step—forexample, to have names that are longer than 32.These objects must have names from 1–8 characters long: authorization ID,referential constraint, database, table space, storage group, package, or plan.A location name can be 1–16 characters long.3 A name must begin with a letter. If the name is in quotation marks, it can startwith and contain any character. Depending on how your string delimiter is set,quoted strings can contain quotation marks such as “O’Malley”.3 A name can contain the letters A–Z, numbers from 0–9, number or pound sign (#),dollar sign ($), or at symbol (@).3 Names are not case sensitive. For example, CUSTOMER and Customer are the same.However, if the name of the object is in quotation marks, it is case sensitive.3 A name cannot be a DB2-reserved word.3 A name cannot be the same as another DB2 object. For example, each columnname within the same table must be unique.Data Types for DB2 Under z/OSOverviewEvery column in a table has a name and a data type. The data type tells DB2 howmuch physical storage to set aside for the column and the form in which the data isstored. This section includes information about DB2 data types, NULL and defaultvalues, and data conversions.For more information about DB2 data types, see your DB2 SQL referencedocumentation.SAS/ACCESS Interface to DB2 under z/OS supports all DB2 data types.