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#include "pq-modifycommand.h"
#include "pq-error.h"
#include <stdlib.h>
#include "pq-connection.h"
PQ::ModifyCommand::ModifyCommand(Connection * conn, const std::string & sql, unsigned int no) :
DB::Command(sql),
DB::ModifyCommand(sql),
PQ::Command(conn, sql, no),
pstmt(nullptr)
{
}
PQ::ModifyCommand::~ModifyCommand()
{
}
const char *
PQ::ModifyCommand::prepare() const
{
if (pstmt) {
return pstmt;
}
auto hash(std::hash<std::string>()(sql));
auto i = c->preparedStatements.find(hash);
if (i != c->preparedStatements.end()) {
return (pstmt = i->second.c_str());
}
std::string psql;
psql.reserve(sql.length() + 20);
prepareSql(psql, sql);
c->checkResultFree(PQprepare(
c->conn, stmntName.c_str(), psql.c_str(), values.size(), NULL), PGRES_COMMAND_OK);
return (pstmt = c->preparedStatements.insert({hash, stmntName}).first->second.c_str());
}
unsigned int
PQ::ModifyCommand::execute(bool anc)
{
PGresult * res = PQexecPrepared(c->conn, prepare(), values.size(), &values.front(), &lengths.front(), NULL, 0);
c->checkResult(res, PGRES_COMMAND_OK, PGRES_TUPLES_OK);
unsigned int rows = atoi(PQcmdTuples(res));
PQclear(res);
if (rows == 0 && !anc) {
throw DB::NoRowsAffected();
}
return rows;
}
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