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#include <Processors/Formats/RowInputFormatWithDiagnosticInfo.h>
#include <Formats/verbosePrintString.h>
#include <IO/Operators.h>
#include <IO/WriteBufferFromString.h>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
static String alignedName(const String & name, size_t max_length)
{
size_t spaces_count = max_length >= name.size() ? max_length - name.size() : 0;
return name + ", " + std::string(spaces_count, ' ');
}
RowInputFormatWithDiagnosticInfo::RowInputFormatWithDiagnosticInfo(const Block & header_, ReadBuffer & in_, const Params & params_)
: IRowInputFormat(header_, in_, params_)
{
}
void RowInputFormatWithDiagnosticInfo::updateDiagnosticInfo()
{
++row_num;
bytes_read_at_start_of_buffer_on_prev_row = bytes_read_at_start_of_buffer_on_current_row;
bytes_read_at_start_of_buffer_on_current_row = in->count() - in->offset();
offset_of_prev_row = offset_of_current_row;
offset_of_current_row = in->offset();
}
std::pair<String, String> RowInputFormatWithDiagnosticInfo::getDiagnosticAndRawDataImpl(bool is_errors_record)
{
WriteBufferFromOwnString out_diag;
WriteBufferFromOwnString out_data;
if (in->eof())
return std::make_pair(
"Buffer has gone, cannot extract information about what has been parsed.",
"Buffer has gone, cannot extract information about what has been parsed.");
const auto & header = getPort().getHeader();
MutableColumns columns = header.cloneEmptyColumns();
/// It is possible to display detailed diagnostics only if the last and next to last rows are still in the read buffer.
size_t bytes_read_at_start_of_buffer = in->count() - in->offset();
if (bytes_read_at_start_of_buffer != bytes_read_at_start_of_buffer_on_prev_row)
{
out_diag << "Could not print diagnostic info because two last rows aren't in buffer (rare case)\n";
out_data << "Could not collect raw data because two last rows aren't in buffer (rare case)\n";
return std::make_pair(out_diag.str(), out_data.str());
}
max_length_of_column_name = 0;
for (size_t i = 0; i < header.columns(); ++i)
if (header.safeGetByPosition(i).name.size() > max_length_of_column_name)
max_length_of_column_name = header.safeGetByPosition(i).name.size();
max_length_of_data_type_name = 0;
for (size_t i = 0; i < header.columns(); ++i)
if (header.safeGetByPosition(i).type->getName().size() > max_length_of_data_type_name)
max_length_of_data_type_name = header.safeGetByPosition(i).type->getName().size();
/// Roll back the cursor to the beginning of the previous or current row and parse all over again. But now we derive detailed information.
if (!is_errors_record && offset_of_prev_row <= in->buffer().size())
{
in->position() = in->buffer().begin() + offset_of_prev_row;
out_diag << "\nRow " << (row_num - 1) << ":\n";
if (!parseRowAndPrintDiagnosticInfo(columns, out_diag))
return std::make_pair(out_diag.str(), out_data.str());
}
else
{
if (in->buffer().size() < offset_of_current_row)
{
out_diag << "Could not print diagnostic info because parsing of data hasn't started.\n";
out_data << "Could not collect raw data because parsing of data hasn't started.\n";
return std::make_pair(out_diag.str(), out_data.str());
}
in->position() = in->buffer().begin() + offset_of_current_row;
}
char * data = in->position();
while (data < in->buffer().end() && *data != '\n' && *data != '\r' && *data != '\0')
{
out_data << *data;
++data;
}
out_diag << "\nRow " << row_num << ":\n";
parseRowAndPrintDiagnosticInfo(columns, out_diag);
out_diag << "\n";
return std::make_pair(out_diag.str(), out_data.str());
}
String RowInputFormatWithDiagnosticInfo::getDiagnosticInfo()
{
auto diagnostic_and_raw_data = getDiagnosticAndRawDataImpl(false);
return std::get<0>(diagnostic_and_raw_data);
}
std::pair<String, String> RowInputFormatWithDiagnosticInfo::getDiagnosticAndRawData()
{
return getDiagnosticAndRawDataImpl(true);
}
bool RowInputFormatWithDiagnosticInfo::deserializeFieldAndPrintDiagnosticInfo(const String & col_name,
const DataTypePtr & type,
IColumn & column,
WriteBuffer & out,
size_t file_column)
{
out << "Column " << file_column << ", " << std::string((file_column < 10 ? 2 : file_column < 100 ? 1 : 0), ' ')
<< "name: " << alignedName(col_name, max_length_of_column_name)
<< "type: " << alignedName(type->getName(), max_length_of_data_type_name);
auto * prev_position = in->position();
std::exception_ptr exception;
try
{
tryDeserializeField(type, column, file_column);
}
catch (...)
{
exception = std::current_exception();
}
auto * curr_position = in->position();
if (curr_position < prev_position)
throw Exception(ErrorCodes::LOGICAL_ERROR, "Logical error: parsing is non-deterministic.");
if (isNativeNumber(type) || isDate(type) || isDateTime(type) || isDateTime64(type))
{
/// An empty string instead of a value.
if (curr_position == prev_position)
{
out << "ERROR: text ";
verbosePrintString(prev_position, std::min(prev_position + 10, in->buffer().end()), out);
out << " is not like " << type->getName() << "\n";
return false;
}
}
out << "parsed text: ";
verbosePrintString(prev_position, curr_position, out);
if (exception)
{
if (type->getName() == "DateTime")
out << "ERROR: DateTime must be in YYYY-MM-DD hh:mm:ss or NNNNNNNNNN (unix timestamp, exactly 10 digits) format.\n";
else if (type->getName() == "Date")
out << "ERROR: Date must be in YYYY-MM-DD format.\n";
else
out << "ERROR\n";
// Print exception message
out << getExceptionMessage(exception, false) << '\n';
return false;
}
out << "\n";
if (type->haveMaximumSizeOfValue())
{
if (isGarbageAfterField(file_column, curr_position))
{
out << "ERROR: garbage after " << type->getName() << ": ";
verbosePrintString(curr_position, std::min(curr_position + 10, in->buffer().end()), out);
out << "\n";
if (type->getName() == "DateTime")
out << "ERROR: DateTime must be in YYYY-MM-DD hh:mm:ss or NNNNNNNNNN (unix timestamp, exactly 10 digits) format.\n";
else if (type->getName() == "Date")
out << "ERROR: Date must be in YYYY-MM-DD format.\n";
return false;
}
}
return true;
}
void RowInputFormatWithDiagnosticInfo::resetParser()
{
IRowInputFormat::resetParser();
row_num = 0;
bytes_read_at_start_of_buffer_on_current_row = 0;
bytes_read_at_start_of_buffer_on_prev_row = 0;
offset_of_current_row = std::numeric_limits<size_t>::max();
offset_of_prev_row = std::numeric_limits<size_t>::max();
max_length_of_column_name = 0;
max_length_of_data_type_name = 0;
}
}
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