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#pragma once
#include <Storages/SelectQueryInfo.h>
#include <Interpreters/PreparedSets.h>
#include <Core/Field.h>
#include <IO/ReadBufferFromString.h>
namespace DB
{
using FieldVectorPtr = std::shared_ptr<FieldVector>;
class IDataType;
using DataTypePtr = std::shared_ptr<const IDataType>;
/** Retrieve from the query a condition of the form `key = 'key'`, `key in ('xxx_'), from conjunctions in the WHERE clause.
* TODO support key like search
*/
std::pair<FieldVectorPtr, bool> getFilterKeys(
const std::string & primary_key, const DataTypePtr & primary_key_type, const SelectQueryInfo & query_info, const ContextPtr & context);
template <typename K, typename V>
void fillColumns(const K & key, const V & value, size_t key_pos, const Block & header, MutableColumns & columns)
{
ReadBufferFromString key_buffer(key);
ReadBufferFromString value_buffer(value);
for (size_t i = 0; i < header.columns(); ++i)
{
const auto & serialization = header.getByPosition(i).type->getDefaultSerialization();
serialization->deserializeBinary(*columns[i], i == key_pos ? key_buffer : value_buffer, {});
}
}
std::vector<std::string> serializeKeysToRawString(
FieldVector::const_iterator & it,
FieldVector::const_iterator end,
DataTypePtr key_column_type,
size_t max_block_size);
std::vector<std::string> serializeKeysToRawString(const ColumnWithTypeAndName & keys);
/// In current implementation key with only column is supported.
size_t getPrimaryKeyPos(const Block & header, const Names & primary_key);
}
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