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- /*
- * Program type: API Interface
- *
- * Description:
- * This program displays employee names and phone extensions.
- *
- * It allocates an output SQLDA, prepares and executes a statement,
- * and loops fetching multiple rows.
- *
- * The SQLCODE returned by fetch is checked.
- */
-
-
-
- #include <stdlib.h>
- #include <string.h>
- #include <stdio.h>
- #include <ibase.h>
- #include "example.h"
-
- #define LASTLEN 20
- #define FIRSTLEN 15
- #define EXTLEN 4
-
- /* This macro is used to declare structures representing SQL VARCHAR types */
- #define SQL_VARCHAR(len) struct {short vary_length; char vary_string[(len)+1];}
-
- int main (ARG(int, argc), ARG(char **, argv))
- ARGLIST(int argc)
- ARGLIST(char **argv)
- {
- SQL_VARCHAR(LASTLEN) last_name;
- SQL_VARCHAR(FIRSTLEN) first_name;
- char phone_ext[EXTLEN + 2];
- short flag0 = 0, flag1 = 0;
- short flag2 = 0;
- isc_stmt_handle stmt = NULL; /* statement handle */
- isc_db_handle DB = NULL; /* database handle */
- isc_tr_handle trans = NULL; /* transaction handle */
- long status[20]; /* status vector */
- XSQLDA ISC_FAR * sqlda;
- long fetch_stat;
- char empdb[128];
- char *sel_str =
- "SELECT last_name, first_name, phone_ext FROM phone_list \
- WHERE location = 'Monterey' ORDER BY last_name, first_name;";
-
- if (argc > 1)
- strcpy(empdb, argv[1]);
- else
- strcpy(empdb, "employee.gdb");
-
- if (isc_attach_database(status, 0, empdb, &DB, 0, NULL))
- isc_print_status(status);
-
- if (isc_start_transaction(status, &trans, 1, &DB, 0, NULL))
- {
- ERREXIT(status, 1)
- }
-
- /* Allocate an output SQLDA. */
- sqlda = (XSQLDA ISC_FAR *) malloc(XSQLDA_LENGTH(3));
- sqlda->sqln = 3;
- sqlda->sqld = 3;
- sqlda->version = 1;
-
- /* Allocate a statement. */
- if (isc_dsql_allocate_statement(status, &DB, &stmt))
- {
- ERREXIT(status, 1)
- }
-
- /* Prepare the statement. */
- if (isc_dsql_prepare(status, &trans, &stmt, 0, sel_str, 1, sqlda))
- {
- ERREXIT(status, 1)
- }
-
- /*
- * Although all three selected columns are of type varchar, the
- * third field's type is changed and printed as type TEXT.
- */
-
- sqlda->sqlvar[0].sqldata = (char *)&last_name;
- sqlda->sqlvar[0].sqltype = SQL_VARYING + 1;
- sqlda->sqlvar[0].sqlind = &flag0;
-
- sqlda->sqlvar[1].sqldata = (char *)&first_name;
- sqlda->sqlvar[1].sqltype = SQL_VARYING + 1;
- sqlda->sqlvar[1].sqlind = &flag1;
-
- sqlda->sqlvar[2].sqldata = (char ISC_FAR *) phone_ext;
- sqlda->sqlvar[2].sqltype = SQL_TEXT + 1;
- sqlda->sqlvar[2].sqlind = &flag2;
-
- printf("\n%-20s %-15s %-10s\n\n", "LAST NAME", "FIRST NAME", "EXTENSION");
-
- /* Execute the statement. */
- if (isc_dsql_execute(status, &trans, &stmt, 1, NULL))
- {
- ERREXIT(status, 1)
- }
-
- /*
- * Fetch and print the records.
- * Status is 100 after the last row is fetched.
- */
- while ((fetch_stat = isc_dsql_fetch(status, &stmt, 1, sqlda)) == 0)
- {
- printf("%-20.*s ", last_name.vary_length, last_name.vary_string);
-
- printf("%-15.*s ", first_name.vary_length, first_name.vary_string);
-
- phone_ext[sqlda->sqlvar[2].sqllen] = '\0';
- printf("%s\n", phone_ext);
- }
-
- if (fetch_stat != 100L)
- {
- ERREXIT(status, 1)
- }
-
- /* Free statement handle. */
- if (isc_dsql_free_statement(status, &stmt, DSQL_close))
- {
- ERREXIT(status, 1)
- }
-
-
- if (isc_commit_transaction(status, &trans))
- {
- ERREXIT(status, 1)
- }
-
- if (isc_detach_database(status, &DB))
- {
- ERREXIT(status, 1)
- }
-
- free( sqlda);
-
- return 0;
- }
-