ClickHouse/dbms/programs/performance-test/applySubstitutions.cpp

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#include "applySubstitutions.h"
#include <algorithm>
#include <vector>
namespace DB
{
void constructSubstitutions(ConfigurationPtr & substitutions_view, StringToVector & out_substitutions)
{
Strings xml_substitutions;
substitutions_view->keys(xml_substitutions);
for (size_t i = 0; i != xml_substitutions.size(); ++i)
{
const ConfigurationPtr xml_substitution(substitutions_view->createView("substitution[" + std::to_string(i) + "]"));
/// Property values for substitution will be stored in a vector
/// accessible by property name
Strings xml_values;
xml_substitution->keys("values", xml_values);
std::string name = xml_substitution->getString("name");
for (size_t j = 0; j != xml_values.size(); ++j)
{
out_substitutions[name].push_back(xml_substitution->getString("values.value[" + std::to_string(j) + "]"));
}
}
}
/// Recursive method which goes through all substitution blocks in xml
/// and replaces property {names} by their values
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static void runThroughAllOptionsAndPush(StringToVector::iterator substitutions_left,
StringToVector::iterator substitutions_right,
const std::string & template_query,
Strings & out_queries)
{
if (substitutions_left == substitutions_right)
{
out_queries.push_back(template_query); /// completely substituted query
return;
}
std::string substitution_mask = "{" + substitutions_left->first + "}";
if (template_query.find(substitution_mask) == std::string::npos) /// nothing to substitute here
{
runThroughAllOptionsAndPush(std::next(substitutions_left), substitutions_right, template_query, out_queries);
return;
}
for (const std::string & value : substitutions_left->second)
{
/// Copy query string for each unique permutation
std::string query = template_query;
size_t substr_pos = 0;
while (substr_pos != std::string::npos)
{
substr_pos = query.find(substitution_mask);
if (substr_pos != std::string::npos)
query.replace(substr_pos, substitution_mask.length(), value);
}
runThroughAllOptionsAndPush(std::next(substitutions_left), substitutions_right, query, out_queries);
}
}
Strings formatQueries(const std::string & query, StringToVector substitutions_to_generate)
{
Strings queries_res;
runThroughAllOptionsAndPush(
substitutions_to_generate.begin(),
substitutions_to_generate.end(),
query,
queries_res);
return queries_res;
}
}