https://github.com/oracle/odpi/issues/40

merge-stmt-info.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dpi.h>

static dpiContext *g_context;

#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif

#define chkerr(func) do { \
    if ((func) < 0) { \
        dpiErrorInfo err; \
        dpiContext_getError(g_context, &err); \
        printf("ERROR at line %d\n  %s\n  %s\n", __LINE__, #func, err.message); \
        exit(1); \
    } \
} while (0)

static const char *env(const char *name, const char *default_value)
{
    const char *value = getenv(name);
    if (value == NULL) {
        value = default_value;
    }
    return value;
}

int main()
{
    const char *username = env("ODPIC_SAMPLES_MAIN_USER", "odpicdemo");
    const char *password = env("ODPIC_SAMPLES_MAIN_PASSWORD", "welcome");
    const char *connectString = env("ODPIC_SAMPLES_CONNECT_STRING", "localhost/orclpdb");
    const char *sqltext = "merge info ..."; // not a valid sql but enought to call dpiStmt_getInfo().
    dpiErrorInfo err;
    dpiConn *conn;
    dpiStmt *stmt;
    dpiStmtInfo stmtInfo;

    if (dpiContext_create(DPI_MAJOR_VERSION, DPI_MINOR_VERSION, &g_context, &err) < 0) {
        printf("ERROR\n  dpiContext_create()\n %s\n", err.message);
        exit(1);
    }

    chkerr(dpiConn_create(g_context, username, strlen(username), password, strlen(password),
                           connectString, strlen(connectString), NULL, NULL, &conn));
    chkerr(dpiConn_prepareStmt(conn, 0, sqltext, strlen(sqltext), NULL, 0, &stmt));
    chkerr(dpiStmt_getInfo(stmt, &stmtInfo));
    printf("SQL: %s\n"
           "  isQuery: %d\n"
           "  isPLSQL: %d\n"
           "  isDDL: %d\n"
           "  isDML: %d\n"
           "  statementType: %d\n"
           "  isReturning: %d\n",
           sqltext, stmtInfo.isQuery, stmtInfo.isPLSQL,
           stmtInfo.isDDL, stmtInfo.isDML,
           stmtInfo.statementType, stmtInfo.isReturning);
    chkerr(dpiStmt_release(stmt));
    chkerr(dpiConn_release(conn));
    return 0;
}