Static Sql Statements; Dynamic Sql Statements - HP NonStop SQL/MP Programming Manual

Explicit Program Compilation

Use of execution-time name resolution to resolve names in execution plans
when the SQL statement executes rather than during explicit SQL compilation
or at SQL load time
CONTROL TABLE
controls these performance-related options for accessing tables and views:

Selection of access paths, join methods, join sequences, and lock types

Selection of block buffering and block splitting algorithms

Action to take for locked data or unavailable partitions

Opening of indexes and partitions at the initial access to a table

Checkpointing of unaudited write operations
For the syntax of each CONTROL directive, see the SQL/MP Reference Manual.

Static SQL Statements

Follow these guidelines when you use a static CONTROL directive with static SQL
statements in a C program:

The scope of a static CONTROL directive is the program's current RTDU. An SQL
map shows each RTDU. To generate an SQL map in the C compiler listing, specify
the SQLMAP option in the SQL directive.
A static CONTROL directive affects all subsequent static SQL statements that
follow in listing order (regardless of execution order) as follows:

Global Scope––In the global scope of a C program (that is, outside of any
functions), a static CONTROL directive affects only SQL statements that follow
in listing order and are not within a function. It does not affect SQL statements
within a function.

Functions––Within a C function (which is a unique RTDU), a CONTROL
directive affects subsequent static SQL statements in the function in listing
order until the end of the function or until another CONTROL directive resets
the directive. A static CONTROL directive outside of a function does not affect
SQL statements in the function.

A CONTROL directive coded within flow-control statements (for example, IF and
ELSE) applies to static SQL statements in the listing order regardless of the
execution order.

To affect a cursor, you must code the CONTROL directive before the DECLARE
CURSOR statement (and in the same RTDU as the DECLARE CURSOR
statement).

A dynamic CONTROL directive does not affect static SQL statements in the
program except as described under
HP NonStop SQL/MP Programming Manual for C—429847-008

Dynamic SQL Statements

6-36
Static SQL Statements
on page 6-36.