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#include "odbc-selectcommand.h"
#include "column.h"
#include "command.h"
#include "error.h"
#include "odbc-column.h"
#include "odbc-command.h"
#include "odbc-error.h"
#include "selectcommand.h"
#include <algorithm>
#include <array>
#include <glibmm/ustring.h>
#include <numeric>
#include <sqlext.h>
#include <utility>
namespace ODBC {
class Connection;
}
ODBC::SelectCommand::SelectCommand(const Connection & c, const std::string & s) :
DB::Command(s), ODBC::Command(c, s), DB::SelectCommand(s)
{
}
ODBC::SelectCommand::~SelectCommand()
{
if (columnCount()) {
SQLCloseCursor(hStmt);
}
}
constexpr std::array<SQLCHAR, 6> truncated = {'0', '1', '0', '0', '4', '\0'};
bool
ODBC::SelectCommand::fetch()
{
if (!columnCount()) {
execute();
}
for (RETCODE rc = SQLFetchScroll(hStmt, SQL_FETCH_NEXT, 0); rc != SQL_NO_DATA;
rc = SQLFetchScroll(hStmt, SQL_FETCH_RELATIVE, 0)) {
if (!SQL_SUCCEEDED(rc)) {
throw Error(rc, SQL_HANDLE_STMT, hStmt);
}
if (rc != SQL_SUCCESS) {
std::array<SQLCHAR, 6> sqlstatus {};
RETCODE diagrc = SQLGetDiagRec(SQL_HANDLE_STMT, hStmt, 1, sqlstatus.data(), nullptr, nullptr, 0, nullptr);
if (SQL_SUCCEEDED(diagrc)) {
if (sqlstatus == truncated) {
for (const auto & c : largeColumns) {
c->resize();
}
continue;
}
}
}
if (std::accumulate(largeColumns.begin(), largeColumns.end(), false, [](auto && resized, auto && c) {
return resized |= c->resize();
})) {
continue;
}
return true;
}
return false;
}
void
ODBC::SelectCommand::execute()
{
SQLRETURN rc = SQLExecute(hStmt);
if (!SQL_SUCCEEDED(rc)) {
throw Error(rc, SQL_HANDLE_STMT, hStmt);
}
SQLSMALLINT colCount;
if (!SQL_SUCCEEDED(rc = SQLNumResultCols(hStmt, &colCount))) {
throw Error(rc, SQL_HANDLE_STMT, hStmt);
}
for (SQLUSMALLINT col = 0; col < colCount; col++) {
std::array<SQLCHAR, 300> _colName {};
SQLSMALLINT nameLen, dp, nullable, bindType;
SQLULEN bindSize;
SQLUSMALLINT sqlcol = col + 1;
// NOLINTNEXTLINE(hicpp-no-array-decay)
if (!SQL_SUCCEEDED(rc = SQLDescribeCol(hStmt, sqlcol, _colName.data(), _colName.size(), &nameLen, &bindType,
&bindSize, &dp, &nullable))) {
throw Error(rc, SQL_HANDLE_STMT, hStmt);
}
Glib::ustring colName(
reinterpret_cast<const char *>(_colName.data()), static_cast<Glib::ustring::size_type>(nameLen));
DB::Column * ncol;
switch (bindType) {
case SQL_DECIMAL:
case SQL_NUMERIC:
case SQL_REAL:
case SQL_FLOAT:
case SQL_DOUBLE:
ncol = insertColumn(std::make_unique<FloatingPointColumn>(this, colName, col)).get();
break;
case SQL_SMALLINT:
case SQL_INTEGER:
case SQL_TINYINT:
case SQL_BIGINT:
ncol = insertColumn(std::make_unique<SignedIntegerColumn>(this, colName, col)).get();
break;
case SQL_TYPE_TIME:
case SQL_INTERVAL_YEAR:
case SQL_INTERVAL_MONTH:
case SQL_INTERVAL_DAY:
case SQL_INTERVAL_HOUR:
case SQL_INTERVAL_MINUTE:
case SQL_INTERVAL_SECOND:
case SQL_INTERVAL_YEAR_TO_MONTH:
case SQL_INTERVAL_DAY_TO_HOUR:
case SQL_INTERVAL_DAY_TO_MINUTE:
case SQL_INTERVAL_DAY_TO_SECOND:
case SQL_INTERVAL_HOUR_TO_MINUTE:
case SQL_INTERVAL_HOUR_TO_SECOND:
case SQL_INTERVAL_MINUTE_TO_SECOND:
ncol = insertColumn(std::make_unique<IntervalColumn>(this, colName, col)).get();
break;
case SQL_TIMESTAMP:
case SQL_DATETIME:
case SQL_TYPE_DATE:
case SQL_TYPE_TIMESTAMP:
ncol = insertColumn(std::make_unique<TimeStampColumn>(this, colName, col)).get();
break;
case SQL_UNKNOWN_TYPE:
throw DB::ColumnTypeNotSupported();
default:
SQLLEN octetSize = 0;
if (!SQL_SUCCEEDED(rc
= SQLColAttribute(hStmt, sqlcol, SQL_DESC_OCTET_LENGTH, nullptr, 0, nullptr, &octetSize))) {
throw Error(rc, SQL_HANDLE_STMT, hStmt);
}
bindSize = static_cast<decltype(bindSize)>(octetSize);
auto lc = std::make_unique<CharArrayColumn>(this, colName, col, bindSize);
largeColumns.insert(lc.get());
ncol = insertColumn(std::move(lc)).get();
break;
};
dynamic_cast<Column *>(ncol)->bind();
}
}
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