/*
* This method processes a block of rows in a single invocation.
*
* The inputs are retrieved via arg_reader
* The outputs are returned via arg_writer
*/
virtual void processBlock(ServerInterface &srvInterface,
BlockReader &arg_reader,
BlockWriter &res_writer)
{
// While we have inputs to process
do {
if (arg_reader.getStringRef(0).isNull()) {
res_writer.getStringRef().setNull();
}
else {
string data = arg_reader.getStringRef(0).str();
string path = arg_reader.getStringRef(1).str();
ResponseInfo response = XMLFunctions::xpath(data, path, srvInterface);
if ((int) response.size() < arg_reader.getIntRef(2)) {
res_writer.getStringRef().setNull();
} else if ((int) response.size() > 0) {
res_writer.getStringRef().copy( response[arg_reader.getIntRef(2)-1]);
} else {
res_writer.getStringRef().setNull();
}
}
res_writer.next();
} while (arg_reader.next());
}
/*
* This method processes a block of rows in a single invocation.
*
* The inputs are retrieved via arg_reader
* The outputs are returned via arg_writer
*/
virtual void processBlock(ServerInterface &srvInterface,
BlockReader &arg_reader,
BlockWriter &res_writer)
{
// Basic error checking
if (arg_reader.getNumCols() != 2)
vt_report_error(0, "Function only accept 2 arguments, but %zu provided",
arg_reader.getNumCols());
// While we have inputs to process
do {
// Get a copy of the input string
const std::string& patternStr = arg_reader.getStringRef(0).str();
const std::string& inStr = arg_reader.getStringRef(1).str();
size_t m = patternStr.size();
size_t n = inStr.size();
size_t d[m+1][n+1];
for (size_t i = 0; i <= m; ++i)
d[i][0] = i; // the distance of any first string to an empty second string
for (size_t j = 0; j <= n; ++j)
d[0][j] = j; // the distance of any second string to an empty first string
for (size_t j = 1; j <= n; ++j)
for (size_t i = 1; i <= m; ++i)
{
if (patternStr[i-1] == inStr[j-1])
d[i][j] = d[i-1][j-1]; // no operation required
else
{
d[i][j] = std::min(std::min(d[i-1][j] + 1, // a deletion
d[i][j-1] + 1), // an insertion
d[i-1][j-1] + 1); // a substitution
}
}
res_writer.setInt(d[m][n]);
res_writer.next();
} while (arg_reader.next());
}
/*
* This method processes a block of rows in a single invocation.
*
* The inputs are retrieved via arg_reader
* The outputs are returned via arg_writer
*/
virtual void processBlock(ServerInterface &srvInterface,
BlockReader &arg_reader,
BlockWriter &res_writer)
{
// While we have inputs to process
do {
if (arg_reader.getStringRef(0).isNull()) {
res_writer.getStringRef().setNull();
}
else {
string data = arg_reader.getStringRef(0).str();
string style = arg_reader.getStringRef(1).str();
res_writer.getStringRef().copy(
XMLFunctions::xslt(data, style, srvInterface)
);
}
res_writer.next();
} while (arg_reader.next());
}
void HllAggregateFunctionBase::aggregate(
ServerInterface &srvInterface,
BlockReader &argReader,
void* state) {
try {
do {
const VString &input = argReader.getStringRef(0);
if (!input.isNull()) {
addItem(srvInterface, state, input);
}
} while (argReader.next());
} catch(exception& e) {
// Standard exception. Quit.
vt_report_error(0, "Exception while processing aggregate: [%s]", e.what());
}
}
/*
* This method processes a block of rows in a single invocation.
*
* The inputs are retrieved via arg_reader
* The outputs are returned via arg_writer
*/
virtual void processBlock(ServerInterface &srvInterface,
BlockReader &arg_reader,
BlockWriter &res_writer)
{
// Basic error checking
if (arg_reader.getNumCols() != 4)
vt_report_error(0, "Function only accept 1 arguments, but %zu provided",
arg_reader.getNumCols());
// While we have inputs to process
do {
char curlresponse[1024];
// Get a copy of the input string
std::string streetStr = arg_reader.getStringRef(0).str();
std::string cityStr = arg_reader.getStringRef(1).str();
std::string stateStr = arg_reader.getStringRef(2).str();
std::string zipStr = arg_reader.getStringRef(3).str();
// Replaces spaces with %20 for URLs
for (size_t pos = streetStr.find(' ');
pos != string::npos;
pos = streetStr.find(' ',pos))
{
streetStr.replace(pos,1,"%20");
}
for (size_t pos = cityStr.find(' ');
pos != string::npos;
pos = cityStr.find(' ',pos))
{
cityStr.replace(pos,1,"%20");
}
// Build the URL
std::string URL = baseURL + "&streetAddress=" + streetStr;
URL += "&city=" + cityStr;
URL += "&state=" + stateStr;
URL += "&zip=" + zipStr;
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, URL.c_str());
}
// curl setup
curl_easy_setopt(curl, CURLOPT_HEADER, 0);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 0);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &curlresponse );
// perform the webservice call
res = curl_easy_perform(curl);
// parse webservice response to get the latitude and longitude data
std::vector<std::string> tokens;
split(tokens,string(curlresponse),',');
std::string latlong = tokens[3] + "," + tokens[4];
// copy data back to Vertica
res_writer.getStringRef().copy(latlong);
res_writer.next();
} while (arg_reader.next());
}