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#include "selectcommand.h"
#include "error.h"
#include "column.h"
#include <sqlext.h>
#include <stdio.h>
#include <string.h>
ODBC::SelectCommand::SelectCommand(const Connection & c, const std::string & s) :
DB::Command(s),
ODBC::Command(c, s),
DB::SelectCommand(s)
{
}
ODBC::SelectCommand::~SelectCommand()
{
for (Columns::iterator i = columns.begin(); i != columns.end(); ++i) {
if (*i) {
delete *i;
}
}
if (columns.size()) {
RETCODE rc = SQLCloseCursor(hStmt);
if (!SQL_SUCCEEDED(rc)) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "ODBC::SelectCommand::~SelectCommand SQLCloseCursor");
}
}
}
bool
ODBC::SelectCommand::fetch()
{
return fetch(SQL_FETCH_NEXT, 0);
}
bool
ODBC::SelectCommand::fetch(SQLSMALLINT orientation, SQLLEN offset)
{
if (columns.empty()) {
execute();
}
RETCODE rc = SQLFetchScroll(hStmt, orientation, offset);
switch (rc) {
case SQL_SUCCESS_WITH_INFO:
default:
{
SQLCHAR sqlstatus[6];
RETCODE diagrc = SQLGetDiagRec(SQL_HANDLE_STMT, hStmt, 1, sqlstatus, NULL, NULL, 0, NULL);
if (SQL_SUCCEEDED(diagrc)) {
if (!strncmp((const char*)sqlstatus, "01004", 5)) {
for (Columns::iterator i = columns.begin(); i != columns.end(); ++i) {
(*i)->resize();
}
return fetch(SQL_FETCH_RELATIVE, 0);
}
}
if (rc != SQL_SUCCESS_WITH_INFO) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "ODBC::SelectCommand::fetch SQLFetch");
}
}
case SQL_SUCCESS:
{
bool resized = false;
for (Columns::iterator i = columns.begin(); i != columns.end(); ++i) {
resized |= (*i)->resize();
}
if (resized) {
return fetch(SQL_FETCH_RELATIVE, 0);
}
return true;
}
case SQL_NO_DATA:
return false;
}
}
void
ODBC::SelectCommand::execute()
{
RETCODE rc = SQLExecute(hStmt);
if (!SQL_SUCCEEDED(rc)) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "ODBC::SelectCommand::execute SQLExecute");
}
SQLSMALLINT colCount;
if (!SQL_SUCCEEDED(rc = SQLNumResultCols(hStmt, &colCount))) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "ODBC::SelectCommand::execute SQLNumResultCols");
}
if (colCount < 1) {
throw Error("ODBC::SelectCommand::execute No result columns");
}
columns.resize(colCount);
for (int col = 0; col < colCount; col++) {
SQLCHAR _colName[300];
SQLSMALLINT nameLen, dp, nullable, bindType;
SQLULEN bindSize;
int sqlcol = col + 1;
if (!SQL_SUCCEEDED(rc = SQLDescribeCol(hStmt, sqlcol, _colName, sizeof(_colName), &nameLen, &bindType,
&bindSize, &dp, &nullable))) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "ODBC::SelectCommand::execute SQLDescribeCol for %d");
}
Glib::ustring colName((const char *)_colName, nameLen);
switch (bindType) {
case SQL_DECIMAL:
case SQL_NUMERIC:
case SQL_REAL:
case SQL_FLOAT:
case SQL_DOUBLE:
columns[col] = new FloatingPointColumn(this, colName, col);
break;
case SQL_SMALLINT:
case SQL_INTEGER:
case SQL_TINYINT:
case SQL_BIGINT:
columns[col] = new SignedIntegerColumn(this, colName, col);
break;
case SQL_TIMESTAMP:
case SQL_DATETIME:
case SQL_TYPE_TIME:
case SQL_TYPE_DATE:
case SQL_TYPE_TIMESTAMP:
columns[col] = new TimeStampColumn(this, colName, col);
break;
default:
columns[col] = new CharArrayColumn(this, colName, col, bindSize);
break;
};
columns[col]->bind();
}
}
const DB::Column&
ODBC::SelectCommand::operator[](unsigned int col) const
{
if (col > columns.size()) {
throw ODBC::Error("Column index out of range");
}
return *columns[col];
}
const DB::Column&
ODBC::SelectCommand::operator[](const Glib::ustring & colName) const
{
for (Columns::const_iterator col = columns.begin(); col != columns.end(); ++col) {
if ((*col)->name == colName) {
return **col;
}
}
throw ODBC::Error("Column does not exist");
}
unsigned int
ODBC::SelectCommand::getOrdinal(const Glib::ustring & 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 does not exist");
}
unsigned int
ODBC::SelectCommand::columnCount() const
{
return columns.size();
}
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