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#include "selectcommand.h"
#include "connection.h"
#include "column.h"
#include "error.h"
#include <string.h>
MySQL::SelectCommand::SelectCommand(const Connection * conn, const std::string & sql) :
DB::Command(sql),
DB::SelectCommand(sql),
MySQL::Command(conn, sql),
executed(false)
{
}
void
MySQL::SelectCommand::execute()
{
if (!executed) {
bindParams();
fields.resize(mysql_stmt_field_count(stmt));
for (Binds::iterator i = fields.begin(); i != fields.end(); ++i) {
memset(&*i, 0, sizeof(MYSQL_BIND));
}
MYSQL_RES * prepare_meta_result = mysql_stmt_result_metadata(stmt);
MYSQL_FIELD * fieldDefs = mysql_fetch_fields(prepare_meta_result);
for (unsigned int i = 0; i < fields.size(); i += 1) {
switch (fieldDefs[i].type) {
case MYSQL_TYPE_TINY:
case MYSQL_TYPE_SHORT:
case MYSQL_TYPE_LONG:
case MYSQL_TYPE_INT24:
case MYSQL_TYPE_LONGLONG:
case MYSQL_TYPE_YEAR:
columns.insert(boost::shared_ptr<ColumnBase>(new Column<int64_t, MYSQL_TYPE_LONGLONG>(fieldDefs[i].name, i, &fields[i])));
break;
case MYSQL_TYPE_DECIMAL:
case MYSQL_TYPE_NEWDECIMAL:
case MYSQL_TYPE_FLOAT:
case MYSQL_TYPE_DOUBLE:
columns.insert(boost::shared_ptr<ColumnBase>(new Column<double, MYSQL_TYPE_DOUBLE>(fieldDefs[i].name, i, &fields[i])));
break;
case MYSQL_TYPE_TIMESTAMP:
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_DATETIME:
columns.insert(boost::shared_ptr<ColumnBase>(new Column<MYSQL_TIME, MYSQL_TYPE_DATETIME>(fieldDefs[i].name, i, &fields[i])));
break;
case MYSQL_TYPE_TIME:
columns.insert(boost::shared_ptr<ColumnBase>(new Column<MYSQL_TIME, MYSQL_TYPE_TIME>(fieldDefs[i].name, i, &fields[i])));
break;
case MYSQL_TYPE_STRING:
case MYSQL_TYPE_VAR_STRING:
columns.insert(boost::shared_ptr<ColumnBase>(new StringColumn(fieldDefs[i].name, i, &fields[i], fieldDefs[i].length)));
break;
case MYSQL_TYPE_NULL:
columns.insert(boost::shared_ptr<ColumnBase>(new NullColumn(fieldDefs[i].name, i, &fields[i])));
break;
case MYSQL_TYPE_BIT:
case MYSQL_TYPE_BLOB:
case MYSQL_TYPE_SET:
case MYSQL_TYPE_ENUM:
case MYSQL_TYPE_GEOMETRY:
default:
mysql_free_result(prepare_meta_result);
throw Error("Unexpected type");
}
}
mysql_free_result(prepare_meta_result);
if (mysql_stmt_bind_result(stmt, &fields.front())) {
throw Error(mysql_stmt_error(stmt));
}
if (mysql_stmt_execute(stmt)) {
throw Error(mysql_stmt_error(stmt));
}
if (mysql_stmt_store_result(stmt)) {
throw Error(mysql_stmt_error(stmt));
}
executed = true;
}
}
bool
MySQL::SelectCommand::fetch()
{
execute();
switch (mysql_stmt_fetch(stmt)) {
case 0:
return true;
case MYSQL_NO_DATA:
return false;
default:
throw Error(mysql_stmt_error(stmt));
}
}
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