HP NonStop SQL/MP Programming Manual page 239

Dynamic SQL Operations
Example 10-7. Basic Dynamic SQL Program (page 3 of 4)
122 /* set DATA_TYPE to long:
123 osqlda.sqlvar[0].data_type = _SQLDT_32BIT_U;
124
125 /* set data_len to 4 bytes; leave scale as 0 in
126 /* upper byte of data_len:
127 osqlda.sqlvar[0].data_len = 4;
128
129 /* set VAR_PTR to point to the address of the output value:*/
130 osqlda.sqlvar[0].var_ptr = (long)&average;
131
132 exec sql BEGIN WORK;
133
134 exec sql DECLARE c1 CURSOR FOR dyncmd;
135 exec sql OPEN c1;
136 exec sql FETCH c1 USING DESCRIPTOR :osqlda;
137
138 if (sqlcode >= 0)
139 printf("\nThe average salary is: %ld\n",average);
140
141 exec sql CLOSE c1;
142
143 exec sql COMMIT WORK;
144
145 } /* end of process_and_execute */
146
147 /* ------------------------------------------------------- */
148
149 void get_cmd( char *cmd )
150 /*
151 /* Assigns a SELECT statement to the statement buffer.
152 /* Gets the WHERE clause from the user and concatenates it */
153 /* to the SELECT statement.
154 /* */
155
156 {
157 char column[9];
158 int sel_index;
159 char predicate[10]; /* comparison predicate for WHERE
160
161 size_t len;
162
163
164
165 strcpy (cmd, "SELECT AVG(SALARY) FROM =EMPLOYEE WHERE ");
166
167 /* Create a simple menu:
168 printf("\nPlease enter:\n\n");
169 printf("1 -- to find average salary based on employee number\n");
170 printf("2 -- to find average salary based on job code\n");
171 printf("3 -- to find average salary based on department number\n\n");
172
173 fgets(temp, (int)sizeof(temp), stdin);
174 sscanf(temp, "%d", &sel_index);
175
176 /* Initialize column and predicate to blanks:
177
178 memset(column, ' ', 9);
179
180 memset(predicate, ' ', 10);
181
HP NonStop SQL/MP Programming Manual for C—429847-008
/* column to be used in WHERE clause */
/* selects column for WHERE clause
/* clause
/* for length of command, to use in
/* blanking out null terminator for
/* transmission to SQL
10-41
Basic Dynamic SQL Program
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