Code SQL statements in REXX applications

REXX procedures do not have to be preprocessed. At run time, the REXX interpreter passes statements that it does not understand to the current active command environment for processing.

The command environment can be changed to *EXECSQL to send all unknown statements to the database manager in two ways:

1. CMDENV parameter on the STRREXPRC CL command
2. address positional parameter on the ADDRESS REXX command

For more information about the STRREXPRC CL command or the ADDRESS REXX command, see the REXX/400 Programmer's Guide topic and the REXX/400 Reference topic.

• Use the SQL communications area in REXX applications
  The fields that make up the SQL Communications Area (SQLCA) are automatically included by the SQL/REXX interface.
• Use SQL descriptor areas in REXX applications
  There are two types of SQL descriptor areas. One is defined with the ALLOCATE DESCRIPTOR statement. The other is defined using the SQL descriptor area (SQLDA) structure. Only the SQLDA form is discussed here. Allocated descriptors are not supported in REXX.
• Embed SQL statements in REXX applications
  An SQL statement can be placed anywhere a REXX command can be placed.
• Use host variables in REXX applications that use SQL
  REXX does not provide for variable declarations.
• Use indicator variables in REXX applications that use SQL
  An indicator variable is an integer.