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#include <stdio.h>
#include <stdlib.h>
#include "common.h"
int main(int argc, char **argv)
{
SQLRETURN rc;
HSTMT hstmt = SQL_NULL_HSTMT;
SQLSMALLINT colcount;
SQLHDESC hDesc;
SQLCHAR name[64];
SQLSMALLINT nameLen = 64;
SQLSMALLINT type, subType;
SQLSMALLINT precision, scale, nullable;
SQLLEN length;
test_connect();
rc = SQLAllocHandle(SQL_HANDLE_STMT, conn, &hstmt);
if (!SQL_SUCCEEDED(rc))
{
print_diag("failed to allocate stmt handle", SQL_HANDLE_DBC, conn);
exit(1);
}
/* Prepare a test table */
rc = SQLExecDirect(hstmt, (SQLCHAR *) "CREATE TEMPORARY TABLE desctable (col1 int4 not null, col2 numeric(4,2), col3 varchar(10) not null, col4 bigint not null)", SQL_NTS);
CHECK_STMT_RESULT(rc, "SQLExecDirect failed while creating temp table", hstmt);
/* Prepare a statement */
rc = SQLPrepare(hstmt, (SQLCHAR *) "SELECT * FROM desctable", SQL_NTS);
CHECK_STMT_RESULT(rc, "SQLPrepare failed", hstmt);
/* Execute */
rc = SQLExecute(hstmt);
CHECK_STMT_RESULT(rc, "SQLExecute failed", hstmt);
rc = SQLNumResultCols(hstmt, &colcount);
CHECK_STMT_RESULT(rc, "SQLNumResultCols failed", hstmt);
/* Get the descriptor handle */
rc = SQLGetStmtAttr(hstmt, SQL_ATTR_IMP_ROW_DESC, &hDesc, 0, NULL);
CHECK_STMT_RESULT(rc, "SQLGetStmtAttr failed", hstmt);
for (int i = 1; i <= colcount; i++)
{
rc = SQLGetDescRec(hDesc, i, name, nameLen, NULL, &type, &subType, &length, &precision, &scale, &nullable);
if (!SQL_SUCCEEDED(rc))
{
print_diag("SQLGetDescRec failed", SQL_HANDLE_DESC, hDesc);
exit(1);
}
printf("\n-- Column %d --\n", i);
printf("SQL_DESC_NAME: %s\n", name);
printf("SQL_DESC_TYPE: %d\n", type);
printf("SQL_DESC_OCTET_LENGTH: %d\n", (int) length);
printf("SQL_DESC_PRECISION: %d\n", precision);
printf("SQL_DESC_SCALE: %d\n", scale);
printf("SQL_DESC_NULLABLE: %d\n", nullable);
}
rc = SQLFreeStmt(hstmt, SQL_CLOSE);
CHECK_STMT_RESULT(rc, "SQLFreeStmt failed", hstmt);
/* Clean up */
test_disconnect();
return 0;
}
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