SQLFetch after Insert statement using UnixODBC - odbc

Question

I've been doing some scripting tests with a SAP Hana database, and am currently trying to pass to it a query, and have it execute in the database, and validate the results with DBeaver. Except when I execute an INSERT query, SQLFetch keeps looping infinitely.
My C code is as follows:
int main()
{
SQLHENV env;
SQLHDBC dbc;
SQLHSTMT stmt;
SQLRETURN ret; /* ODBC API return status */
SQLSMALLINT columns, rows; /* number of columns in result-set */
SQLCHAR outstr[1024];
SQLSMALLINT outstrlen;
int row = 0;
columns = 0;
/* Allocate an environment handle */
SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &env);
/* We want ODBC 3 support */
SQLSetEnvAttr(env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
/* Allocate a connection handle */
SQLAllocHandle(SQL_HANDLE_DBC, env, &dbc);
ret = SQLDriverConnect(dbc, NULL, "driver=/usr/lib/libodbcHDB32.so;servernode=hana.tests.com:39015;UID=TESTDB;PWD=abc123", SQL_NTS,
outstr, sizeof(outstr), &outstrlen, SQL_DRIVER_COMPLETE);
if (SQL_SUCCEEDED(ret)) {
printf("Connected\n");
printf("Returned connection string was:\n\t%s\n", outstr);
} else {
fprintf(stderr, "Failed to connect\n");
return -1;
}
/* Allocate a statement handle */
SQLAllocHandle(SQL_HANDLE_STMT, dbc, &stmt);
/* Retrieve a list of tables */
SQLExecDirect(stmt, "INSERT INTO NEWTABLE VALUES ('test123');", SQL_NTS);
/* How many columns are there */
SQLNumResultCols(stmt, &columns);
fprintf(stderr, "Number of columns: %d\n", columns);
/* Loop through the rows in the result-set */
while ((ret = SQLFetch(stmt)) == SQL_SUCCESS) {
SQLUSMALLINT i;
printf("Row %d\n", row++);
/* Loop through the columns */
for (i = 1; i <= columns; i++) {
SQLINTEGER indicator;
char buf[512];
/* retrieve column data as a string */
ret = SQLGetData(stmt, i, SQL_C_CHAR,
buf, sizeof(buf), &indicator);
if (SQL_SUCCEEDED(ret)) {
/* Handle null columns */
if (indicator == SQL_NULL_DATA) strcpy(buf, "NULL");
printf(" Column %u : %s\n", i, buf);
}
}
}
return 0;
}
In the output the code keeps printing:
Number of columns: 0
Row 0
Row 1
Row 2
Row 3
Row 4
...
And so on... SQLFetch always seems to return SQL_SUCCESS. Am I missing some configuration step that prevents this behavior? I expected that if the statement was INSERT either SQLFetch would return something other than SQL_SUCCESS.
I mainly guided myself through this tutorial https://www.easysoft.com/developer/languages/c/odbc_tutorial.html#basic_fetch. Any help is much appreciated. Thanks!