diff --git a/src/Common/LineReader.cpp b/src/Common/LineReader.cpp
deleted file mode 100644
index ed7a53e2e83..00000000000
--- a/src/Common/LineReader.cpp
+++ /dev/null
@@ -1,185 +0,0 @@
-#include <Common/LineReader.h>
-
-#include <iostream>
-#include <string_view>
-
-#include <string.h>
-#include <unistd.h>
-
-#ifdef OS_LINUX
-/// We can detect if code is linked with one or another readline variants or open the library dynamically.
-#   include <dlfcn.h>
-extern "C"
-{
-    char * readline(const char *) __attribute__((__weak__));
-    char * (*readline_ptr)(const char *) = readline;
-}
-#endif
-
-namespace
-{
-
-/// Trim ending whitespace inplace
-void trim(String & s)
-{
-    s.erase(std::find_if(s.rbegin(), s.rend(), [](int ch) { return !std::isspace(ch); }).base(), s.end());
-}
-
-/// Check if multi-line query is inserted from the paste buffer.
-/// Allows delaying the start of query execution until the entirety of query is inserted.
-bool hasInputData()
-{
-    timeval timeout = {0, 0};
-    fd_set fds{};
-    FD_ZERO(&fds);
-    FD_SET(STDIN_FILENO, &fds);
-    return select(1, &fds, nullptr, nullptr, &timeout) == 1;
-}
-
-}
-
-LineReader::Suggest::WordsRange LineReader::Suggest::getCompletions(const String & prefix, size_t prefix_length) const
-{
-    if (!ready)
-        return std::make_pair(words.end(), words.end());
-
-    std::string_view last_word;
-
-    auto last_word_pos = prefix.find_last_of(word_break_characters);
-    if (std::string::npos == last_word_pos)
-        last_word = prefix;
-    else
-        last_word = std::string_view(prefix).substr(last_word_pos + 1, std::string::npos);
-
-    /// last_word can be empty.
-
-    /// Only perform case sensitive completion when the prefix string contains any uppercase characters
-    if (std::none_of(prefix.begin(), prefix.end(), [&](auto c) { return c >= 'A' && c <= 'Z'; }))
-        return std::equal_range(
-            words_no_case.begin(), words_no_case.end(), last_word, [prefix_length](std::string_view s, std::string_view prefix_searched)
-            {
-                return strncasecmp(s.data(), prefix_searched.data(), prefix_length) < 0;
-            });
-    else
-        return std::equal_range(words.begin(), words.end(), last_word, [prefix_length](std::string_view s, std::string_view prefix_searched)
-        {
-            return strncmp(s.data(), prefix_searched.data(), prefix_length) < 0;
-        });
-}
-
-LineReader::LineReader(const String & history_file_path_, bool multiline_, Patterns extenders_, Patterns delimiters_)
-    : history_file_path(history_file_path_), multiline(multiline_), extenders(std::move(extenders_)), delimiters(std::move(delimiters_))
-{
-    /// FIXME: check extender != delimiter
-}
-
-String LineReader::readLine(const String & first_prompt, const String & second_prompt)
-{
-    String line;
-    bool need_next_line = false;
-
-    while (auto status = readOneLine(need_next_line ? second_prompt : first_prompt))
-    {
-        if (status == RESET_LINE)
-        {
-            line.clear();
-            need_next_line = false;
-            continue;
-        }
-
-        if (input.empty())
-        {
-            if (!line.empty() && !multiline && !hasInputData())
-                break;
-            else
-                continue;
-        }
-
-#if !defined(ARCADIA_BUILD) /// C++20
-        const char * has_extender = nullptr;
-        for (const auto * extender : extenders)
-        {
-            if (input.ends_with(extender))
-            {
-                has_extender = extender;
-                break;
-            }
-        }
-
-        const char * has_delimiter = nullptr;
-        for (const auto * delimiter : delimiters)
-        {
-            if (input.ends_with(delimiter))
-            {
-                has_delimiter = delimiter;
-                break;
-            }
-        }
-
-        need_next_line = has_extender || (multiline && !has_delimiter) || hasInputData();
-
-        if (has_extender)
-        {
-            input.resize(input.size() - strlen(has_extender));
-            trim(input);
-            if (input.empty())
-                continue;
-        }
-#endif
-
-        line += (line.empty() ? "" : " ") + input;
-
-        if (!need_next_line)
-            break;
-    }
-
-    if (!line.empty() && line != prev_line)
-    {
-        addToHistory(line);
-        prev_line = line;
-    }
-
-    return line;
-}
-
-LineReader::InputStatus LineReader::readOneLine(const String & prompt)
-{
-    input.clear();
-
-#ifdef OS_LINUX
-    if (!readline_ptr)
-    {
-        for (const auto * name : {"libreadline.so", "libreadline.so.0", "libeditline.so", "libeditline.so.0"})
-        {
-            void * dl_handle = dlopen(name, RTLD_LAZY);
-            if (dl_handle)
-            {
-                readline_ptr = reinterpret_cast<char * (*)(const char *)>(dlsym(dl_handle, "readline"));
-                if (readline_ptr)
-                {
-                    break;
-                }
-            }
-        }
-    }
-
-    /// Minimal support for readline
-    if (readline_ptr)
-    {
-        char * line_read = (*readline_ptr)(prompt.c_str());
-        if (!line_read)
-            return ABORT;
-        input = line_read;
-    }
-    else
-#endif
-    {
-        std::cout << prompt;
-        std::getline(std::cin, input);
-        if (!std::cin.good())
-            return ABORT;
-    }
-
-    trim(input);
-    return INPUT_LINE;
-}
diff --git a/src/Common/LineReader.h b/src/Common/LineReader.h
deleted file mode 100644
index f31459078ab..00000000000
--- a/src/Common/LineReader.h
+++ /dev/null
@@ -1,65 +0,0 @@
-#pragma once
-
-#include <common/types.h>
-
-#include <atomic>
-#include <vector>
-
-class LineReader
-{
-public:
-    struct Suggest
-    {
-        using Words = std::vector<std::string>;
-        using WordsRange = std::pair<Words::const_iterator, Words::const_iterator>;
-
-        Words words;
-        Words words_no_case;
-        std::atomic<bool> ready{false};
-
-        /// Get iterators for the matched range of words if any.
-        WordsRange getCompletions(const String & prefix, size_t prefix_length) const;
-    };
-
-    using Patterns = std::vector<const char *>;
-
-    LineReader(const String & history_file_path, bool multiline, Patterns extenders, Patterns delimiters);
-    virtual ~LineReader() {}
-
-    /// Reads the whole line until delimiter (in multiline mode) or until the last line without extender.
-    /// If resulting line is empty, it means the user interrupted the input.
-    /// Non-empty line is appended to history - without duplication.
-    /// Typical delimiter is ';' (semicolon) and typical extender is '\' (backslash).
-    String readLine(const String & first_prompt, const String & second_prompt);
-
-    /// When bracketed paste mode is set, pasted text is bracketed with control sequences so
-    /// that the program can differentiate pasted text from typed-in text. This helps
-    /// clickhouse-client so that without -m flag, one can still paste multiline queries, and
-    /// possibly get better pasting performance. See https://cirw.in/blog/bracketed-paste for
-    /// more details.
-    virtual void enableBracketedPaste() {}
-
-protected:
-    enum InputStatus
-    {
-        ABORT = 0,
-        RESET_LINE,
-        INPUT_LINE,
-    };
-
-    const String history_file_path;
-    static constexpr char word_break_characters[] = " \t\n\r\"\\'`@$><=;|&{(.";
-
-    String input;
-
-private:
-    bool multiline;
-
-    Patterns extenders;
-    Patterns delimiters;
-
-    String prev_line;
-
-    virtual InputStatus readOneLine(const String & prompt);
-    virtual void addToHistory(const String &) {}
-};
diff --git a/src/Common/ReadlineLineReader.cpp b/src/Common/ReadlineLineReader.cpp
deleted file mode 100644
index 9363dadd04f..00000000000
--- a/src/Common/ReadlineLineReader.cpp
+++ /dev/null
@@ -1,182 +0,0 @@
-#if defined(USE_READLINE)
-
-#include <Common/ReadlineLineReader.h>
-#include <ext/scope_guard.h>
-
-#include <errno.h>
-#include <signal.h>
-#include <string.h>
-#include <unistd.h>
-#include <iostream>
-#include <ostream>
-
-namespace
-{
-
-/// Trim ending whitespace inplace
-void trim(String & s)
-{
-    s.erase(std::find_if(s.rbegin(), s.rend(), [](int ch) { return !std::isspace(ch); }).base(), s.end());
-}
-
-}
-
-static const LineReader::Suggest * suggest;
-
-/// Points to current word to suggest.
-static LineReader::Suggest::Words::const_iterator pos;
-/// Points after the last possible match.
-static LineReader::Suggest::Words::const_iterator end;
-
-/// Set iterators to the matched range of words if any.
-static void findRange(const char * prefix, size_t prefix_length)
-{
-    std::string prefix_str(prefix);
-    std::tie(pos, end) = suggest->getCompletions(prefix_str, prefix_length);
-}
-
-/// Iterates through matched range.
-static char * nextMatch()
-{
-    if (pos >= end)
-        return nullptr;
-
-    /// readline will free memory by itself.
-    char * word = strdup(pos->c_str());
-    ++pos;
-    return word;
-}
-
-static char * generate(const char * text, int state)
-{
-    if (!suggest->ready)
-        return nullptr;
-    if (state == 0)
-        findRange(text, strlen(text));
-
-    /// Do not append whitespace after word. For unknown reason, rl_completion_append_character = '\0' does not work.
-    rl_completion_suppress_append = 1;
-
-    return nextMatch();
-};
-
-ReadlineLineReader::ReadlineLineReader(
-    const Suggest & suggest_, const String & history_file_path_, bool multiline_, Patterns extenders_, Patterns delimiters_)
-    : LineReader(history_file_path_, multiline_, std::move(extenders_), std::move(delimiters_))
-{
-    suggest = &suggest_;
-
-    if (!history_file_path.empty())
-    {
-        int res = read_history(history_file_path.c_str());
-        if (res)
-            std::cerr << "Cannot read history from file " + history_file_path + ": "+ strerror(errno) << std::endl;
-    }
-
-    /// Added '.' to the default list. Because it is used to separate database and table.
-    rl_basic_word_break_characters = word_break_characters;
-
-    /// Not append whitespace after single suggestion. Because whitespace after function name is meaningless.
-    rl_completion_append_character = '\0';
-
-    rl_completion_entry_function = generate;
-
-    /// Install Ctrl+C signal handler that will be used in interactive mode.
-
-    if (rl_initialize())
-        throw std::runtime_error("Cannot initialize readline");
-
-    auto clear_prompt_or_exit = [](int)
-    {
-        /// This is signal safe.
-        ssize_t res = write(STDOUT_FILENO, "\n", 1);
-
-        /// Allow to quit client while query is in progress by pressing Ctrl+C twice.
-        /// (First press to Ctrl+C will try to cancel query by InterruptListener).
-        if (res == 1 && rl_line_buffer[0] && !RL_ISSTATE(RL_STATE_DONE))
-        {
-            rl_replace_line("", 0);
-            if (rl_forced_update_display())
-                _exit(0);
-        }
-        else
-        {
-            /// A little dirty, but we struggle to find better way to correctly
-            /// force readline to exit after returning from the signal handler.
-            _exit(0);
-        }
-    };
-
-    if (signal(SIGINT, clear_prompt_or_exit) == SIG_ERR)
-        throw std::runtime_error(std::string("Cannot set signal handler for readline: ") + strerror(errno));
-
-    rl_variable_bind("completion-ignore-case", "on");
-}
-
-ReadlineLineReader::~ReadlineLineReader()
-{
-}
-
-LineReader::InputStatus ReadlineLineReader::readOneLine(const String & prompt)
-{
-    input.clear();
-
-    const char* cinput = readline(prompt.c_str());
-    if (cinput == nullptr)
-        return (errno != EAGAIN) ? ABORT : RESET_LINE;
-    input = cinput;
-
-    trim(input);
-    return INPUT_LINE;
-}
-
-void ReadlineLineReader::addToHistory(const String & line)
-{
-    add_history(line.c_str());
-}
-
-#if RL_VERSION_MAJOR >= 7
-
-#define BRACK_PASTE_PREF "\033[200~"
-#define BRACK_PASTE_SUFF "\033[201~"
-
-#define BRACK_PASTE_LAST '~'
-#define BRACK_PASTE_SLEN 6
-
-/// This handler bypasses some unused macro/event checkings and remove trailing newlines before insertion.
-static int clickhouse_rl_bracketed_paste_begin(int /* count */, int /* key */)
-{
-    std::string buf;
-    buf.reserve(128);
-
-    RL_SETSTATE(RL_STATE_MOREINPUT);
-    SCOPE_EXIT(RL_UNSETSTATE(RL_STATE_MOREINPUT));
-    int c;
-    while ((c = rl_read_key()) >= 0)
-    {
-        if (c == '\r')
-            c = '\n';
-        buf.push_back(c);
-        if (buf.size() >= BRACK_PASTE_SLEN && c == BRACK_PASTE_LAST && buf.substr(buf.size() - BRACK_PASTE_SLEN) == BRACK_PASTE_SUFF)
-        {
-            buf.resize(buf.size() - BRACK_PASTE_SLEN);
-            break;
-        }
-    }
-    trim(buf);
-    return static_cast<size_t>(rl_insert_text(buf.c_str())) == buf.size() ? 0 : 1;
-}
-
-#endif
-
-void ReadlineLineReader::enableBracketedPaste()
-{
-#if RL_VERSION_MAJOR >= 7
-    rl_variable_bind("enable-bracketed-paste", "on");
-
-    /// Use our bracketed paste handler to get better user experience. See comments above.
-    rl_bind_keyseq(BRACK_PASTE_PREF, clickhouse_rl_bracketed_paste_begin);
-#endif
-};
-
-#endif
diff --git a/src/Common/ReadlineLineReader.h b/src/Common/ReadlineLineReader.h
deleted file mode 100644
index 95bd23b4634..00000000000
--- a/src/Common/ReadlineLineReader.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#pragma once
-
-#include "LineReader.h"
-
-#include <readline/readline.h>
-#include <readline/history.h>
-
-class ReadlineLineReader : public LineReader
-{
-public:
-    ReadlineLineReader(const Suggest & suggest, const String & history_file_path, bool multiline, Patterns extenders_, Patterns delimiters_);
-    ~ReadlineLineReader() override;
-
-    void enableBracketedPaste() override;
-
-private:
-    InputStatus readOneLine(const String & prompt) override;
-    void addToHistory(const String & line) override;
-};