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#include "selectcommand.h"
#include "error.h"
#include "column.h"
#include <sqlext.h>
ODBC::SelectCommand::SelectCommand(const Connection& c, String s) :
Command(c, s)
{
}
ODBC::SelectCommand::~SelectCommand()
{
for (Columns::iterator i = columns.begin(); i != columns.end(); i++) {
if (*i) {
delete *i;
}
}
RETCODE rc;
if ((rc = SQLCloseCursor(hStmt)) != SQL_SUCCESS) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLCloseCursor",
__FUNCTION__);
}
}
bool
ODBC::SelectCommand::fetch()
{
if (columns.size() == 0) {
execute();
}
RETCODE rc = SQLFetch(hStmt);
switch (rc) {
case SQL_SUCCESS:
for (Columns::iterator col = columns.begin(); col != columns.end(); col++) {
(*col)->fresh = true;
}
return true;
case SQL_NO_DATA:
return false;
default:
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLFetch",
__FUNCTION__);
}
}
// This is here cos it needs to be referenced by (and only by) execute
template <class t>
ODBC::_Column<t>::_Column(String n, unsigned int i) : Column(n, i)
{
}
void
ODBC::SelectCommand::execute()
{
RETCODE rc = SQLExecute(hStmt);
if (rc != SQL_SUCCESS) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLExecute",
__FUNCTION__);
}
SQLSMALLINT colCount;
if ((rc = SQLNumResultCols(hStmt, &colCount)) != SQL_SUCCESS) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLNumResultCols",
__FUNCTION__);
}
if (colCount < 1) {
throw Error("%s: No result columns", __FUNCTION__);
}
columns.resize(colCount);
for (int col = 0; col < colCount; col++) {
SQLCHAR colName[300];
SQLSMALLINT nameLen, dp, nullable, bindType;
SQLUINTEGER bindSize;
int sqlcol = col + 1;
if ((rc = SQLDescribeCol(hStmt, sqlcol, colName, sizeof(colName), &nameLen, &bindType,
&bindSize, &dp, &nullable)) != SQL_SUCCESS) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLDescribeCol for %d",
__FUNCTION__, col);
}
colName[nameLen] = '\0';
switch (bindType) {
case -9:
case SQL_CHAR:
case SQL_VARCHAR:
case SQL_LONGVARCHAR:
{
_Column<SQLCHAR*>* s = new _Column<SQLCHAR*>(colName, col);
s->value = new SQLCHAR[bindSize + 1];
s->bind(hStmt, sqlcol, SQL_C_CHAR, s->value, bindSize + 1);
columns[col] = s;
break;
}
case SQL_DECIMAL:
case SQL_NUMERIC:
case SQL_REAL:
case SQL_FLOAT:
case SQL_DOUBLE:
{
_Column<SQLDOUBLE>* d = new _Column<SQLDOUBLE>(colName, col);
d->bind(hStmt, sqlcol, SQL_C_DOUBLE, &d->value, sizeof(double));
columns[col] = d;
break;
}
case SQL_SMALLINT:
case SQL_INTEGER:
case SQL_TINYINT:
case SQL_BIGINT:
{
_Column<SQLINTEGER>* i = new _Column<SQLINTEGER>(colName, col);
i->bind(hStmt, sqlcol, SQL_C_LONG, &i->value, sizeof(int));
columns[col] = i;
break;
}
case 11:
case SQL_DATETIME:
case SQL_TYPE_TIME:
case SQL_TYPE_DATE:
case SQL_TYPE_TIMESTAMP:
{
_Column<TimeTypePair>* t = new _Column<TimeTypePair>(colName, col);
t->bind(hStmt, sqlcol, SQL_C_TYPE_TIMESTAMP, &t->value.sql(),
sizeof(SQL_TIMESTAMP_STRUCT));
columns[col] = t;
break;
}
default:
throw Error(
"%s: Bad column type: idx=%d, name=%s, type=%d, size=%ld, dp=%d, null=%d",
__FUNCTION__, col, colName, bindType, bindSize, dp, nullable);
break;
};
}
}
const ODBC::Column&
ODBC::SelectCommand::operator[](unsigned int col) const
{
if (col > columns.size()) {
throw ODBC::Error("Column index (%u) out of range", col);
}
return *columns[col];
}
const ODBC::Column&
ODBC::SelectCommand::operator[](const String & colName) const
{
for (Columns::const_iterator col = columns.begin(); col != columns.end(); col++) {
if ((*col)->name == colName) {
return **col;
}
}
throw ODBC::Error("Column (%s) does not exist", colName.c_str());
}
unsigned int
ODBC::SelectCommand::getOrdinal(const String & colName) const
{
unsigned int n = 0;
for (Columns::const_iterator col = columns.begin(); col != columns.end(); col++) {
if ((*col)->name == colName) {
return n;
}
n += 1;
}
throw ODBC::Error("Column (%s) does not exist", colName.c_str());
}
unsigned int
ODBC::SelectCommand::columnCount() const
{
return columns.size();
}
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