Method rewriteQuery

src/backends/firebird/statement.cpp:179–287

}

void firebird_statement_backend::rewriteQuery(
    std::string const &query, std::vector<char> &buffer)
{
    // buffer for temporary query
    std::vector<char> tmpQuery;
    std::vector<char>::iterator qItr;

    // buffer for query with named parameters changed to standard ones
    std::vector<char> rewQuery(query.size() + 1);

    // take care of named parameters in original query
    rewriteParameters(query, rewQuery);

    std::string const prefix("execute procedure ");
    std::string const prefix2("select * from ");

    // for procedures, we are preparing statement to determine
    // type of procedure.
    if (procedure_)
    {
        tmpQuery.resize(prefix.size() + rewQuery.size());
        qItr = tmpQuery.begin();
        std::copy(prefix.begin(), prefix.end(), qItr);
        qItr += prefix.size();
    }
    else
    {
        tmpQuery.resize(rewQuery.size());
        qItr = tmpQuery.begin();
    }

    // prepare temporary query
    std::copy(rewQuery.begin(), rewQuery.end(), qItr);

    // preparing buffers for output parameters
    if (sqldap_ == nullptr)
    {
        prepareSQLDA(&sqldap_);
    }

    ISC_STATUS stat[ISC_STATUS_LENGTH];
    isc_stmt_handle tmpStmtp = 0;

    // allocate temporary statement to determine its type
    if (isc_dsql_allocate_statement(stat, &session_.dbhp_, &tmpStmtp))
    {
        throw_iscerror(stat);
    }

    // prepare temporary statement
    if (isc_dsql_prepare(stat, session_.current_transaction(), &tmpStmtp, 0,
        &tmpQuery[0], SQL_DIALECT_V6, sqldap_))
    {
        throw_iscerror(stat);
    }

    // get statement type
    int stType = statementType(tmpStmtp);