Example 10-7. Basic Dynamic Sql Program - HP NonStop SQL/MP Programming Manual

Dynamic SQL Operations
Example 10-7. Basic Dynamic SQL Program (page 1 of 4)
1 /* This program finds the average salary for employees
2 /* according to criteria established by the user. The
3 /* program contains a SELECT statement for the EMPLOYEE
4 /* table; the user enters the selection criteria, which
5 /* the program concatenates to the SELECT statement as a
6 /* WHERE clause.
7 /* */
8 #pragma inspect
9 #pragma symbols
10 #pragma SQL
11 #pragma xmem
12 #pragma runnable
13 #pragma nolmap
14 #pragma nomap
15
16 #pragma nolist
17 #include <stdioh>
18 #include <stdlibh>
19 #include <stringh>
20 #include <memoryh>
21
22 /* For SQL error reporting:
23 #include <cextdecs (SQLCADISPLAY)>
24
25 /* For SQL data type literals:
26 #include <sqlh>
27 #pragma list
28
29 #define MAXCMD 512
30
31 /* Global variables:
32 int sqlcode;
33 long average;
34 int i;
35 char temp[100];
36
37 /* Buffers for storing SQL statements are always blank
38 /* padded, never null terminated.
39 char cmd[MAXCMD];
40
41
42 /* Include SQLCA for error checking, SQLSA for dynamic SQL
43 /* processing information:
44 exec sql INCLUDE SQLCA;
45 exec sql INCLUDE SQLSA;
46
47 /* The program will have only one output column, SALARY.
48 /* Since we will be generating its average, we do not need
49 /* to print the column name--we can therefore omit
50 /* declaring a names buffer. We will use this SQLDA (not
51 /* a template) because we are not allocating memory
52 /* dynamically--we know we need only one output variable.
53
54 /* C differs from Pascal and COBOL in requiring that the
55 /* INCLUDE SQLDA statement appear within a DECLARE section. */
56 exec sql BEGIN DECLARE SECTION;
57 exec sql INCLUDE SQLDA (osqlda,1) ;
58 exec sql END DECLARE SECTION;
59
60 /* ------------------------------------------------------- */
61
HP NonStop SQL/MP Programming Manual for C—429847-008
/* for error checking
/* for output value
/* loop counter
/* temporary storage for user input
/* for SQL statement user enters
10-39
Basic Dynamic SQL Program
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