Merging upstream version 4.0.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-09 20:05:21 +01:00 · 2025-02-09 20:05:21 +01:00 · 7c65fc707e
commit 7c65fc707e
parent af10454b21
42 changed files with 955 additions and 184 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -1,6 +1,9 @@
 name: pgcli

 on:
+  push:
+    branches:
+      - main
  pull_request:
    paths-ignore:
      - '**.rst'
@ -11,7 +14,7 @@ jobs:

    strategy:
      matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]

    services:
      postgres:
@ -28,10 +31,10 @@ jobs:
          --health-retries 5

    steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4

      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
        with:
          python-version: ${{ matrix.python-version }}

@ -64,6 +67,10 @@ jobs:

            psql -h localhost -U postgres -p 6432 pgbouncer -c 'show help'

+      - name: Install beta version of pendulum
+        run: pip install pendulum==3.0.0b1
+        if: matrix.python-version == '3.12'
+
      - name: Install requirements
        run: |
          pip install -U pip setuptools
@ -72,7 +79,7 @@ jobs:
          pip install keyrings.alt>=3.1

      - name: Run unit tests
-        run: coverage run --source pgcli -m py.test
+        run: coverage run --source pgcli -m pytest

      - name: Run integration tests
        env:
@ -86,7 +93,7 @@ jobs:

      - name: Run Black
        run: black --check .
-        if: matrix.python-version == '3.7'
+        if: matrix.python-version == '3.8'

      - name: Coverage
        run: |
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@ -0,0 +1,41 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  schedule:
+    - cron: "29 13 * * 1"
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ python ]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: ${{ matrix.language }}
+          queries: +security-and-quality
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v2
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2
+        with:
+          category: "/language:${{ matrix.language }}"
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@ -1,5 +1,5 @@
 repos:
 -   repo: https://github.com/psf/black
-    rev: 22.3.0
+    rev: 23.3.0
    hooks:
    - id: black
--- a/7
+++ b/7
@ -123,6 +123,13 @@ Contributors:
    * Daniel Kukula (dkuku)
    * Kian-Meng Ang (kianmeng)
    * Liu Zhao (astroshot)
+    * Rigo Neri (rigoneri)
+    * Anna Glasgall (annathyst)
+    * Andy Schoenberger (andyscho)
+    * Damien Baty (dbaty)
+    * blag
+    * Rob Berry (rob-b)
+    * Sharon Yogev (sharonyogev)

 Creator:
 --------
--- a/DEVELOP.rst
+++ b/DEVELOP.rst
@ -165,7 +165,8 @@ in the ``tests`` directory.  An example::
 First, install the requirements for testing:

 ::
-
+    $ pip install -U pip setuptools 
+    $ pip install --no-cache-dir ".[sshtunnel]" 
    $ pip install -r requirements-dev.txt 

 Ensure that the database user has permissions to create and drop test databases
--- a/README.rst
+++ b/README.rst
@ -157,8 +157,9 @@ get this running in a development setup.

 https://github.com/dbcli/pgcli/blob/master/DEVELOP.rst

-Please feel free to reach out to me if you need help.
-My email: amjith.r@gmail.com, Twitter: `@amjithr <http://twitter.com/amjithr>`_
+Please feel free to reach out to us if you need help.
+* Amjith, pgcli author: amjith.r@gmail.com, Twitter: `@amjithr <http://twitter.com/amjithr>`_
+* Irina, pgcli maintainer: i.chernyavska@gmail.com, Twitter: `@irinatruong <http://twitter.com/irinatruong>`_

 Detailed Installation Instructions:
 -----------------------------------
@ -351,8 +352,7 @@ choice:

    In [3]: my_result = _

-Pgcli only runs on Python3.7+ since 4.0.0, if you use an old version of Python,
-you should use install ``pgcli <= 4.0.0``.
+Pgcli dropped support for Python<3.8 as of 4.0.0. If you need it, install ``pgcli <= 4.0.0``.

 Thanks:
 -------
@ -372,8 +372,8 @@ interface to Postgres database.
 Thanks to all the beta testers and contributors for your time and patience. :)


-.. |Build Status| image:: https://github.com/dbcli/pgcli/workflows/pgcli/badge.svg
-    :target: https://github.com/dbcli/pgcli/actions?query=workflow%3Apgcli
+.. |Build Status| image:: https://github.com/dbcli/pgcli/actions/workflows/ci.yml/badge.svg?branch=main
+    :target: https://github.com/dbcli/pgcli/actions/workflows/ci.yml

 .. |CodeCov| image:: https://codecov.io/gh/dbcli/pgcli/branch/master/graph/badge.svg
   :target: https://codecov.io/gh/dbcli/pgcli
--- a/changelog.rst
+++ b/changelog.rst
@ -1,3 +1,52 @@
+==================
+4.0.1 (2023-11-30)
+==================
+
+Internal:
+---------
+* Allow stable version of pendulum.
+
+==================
+4.0.0 (2023-11-27)
+==================
+
+Features:
+---------
+
+* Ask for confirmation when quitting cli while a transaction is ongoing.
+* New `destructive_statements_require_transaction` config option to refuse to execute a
+  destructive SQL statement if outside a transaction. This option is off by default.
+* Changed the `destructive_warning` config to be a list of commands that are considered
+  destructive. This would allow you to be warned on `create`, `grant`, or `insert` queries.
+* Destructive warnings will now include the alias dsn connection string name if provided (-D option).
+* pgcli.magic will now work with connection URLs that use TLS client certificates for authentication
+* Have config option to retry queries on operational errors like connections being lost.
+  Also prevents getting stuck in a retry loop.
+* Config option to not restart connection when cancelling a `destructive_warning` query. By default,
+  it will now not restart.
+* Config option to always run with a single connection.
+* Add comment explaining default LESS environment variable behavior and change example pager setting.
+* Added `\echo` & `\qecho` special commands. ([issue 1335](https://github.com/dbcli/pgcli/issues/1335)).
+
+Bug fixes:
+----------
+
+* Fix `\ev` not producing a correctly quoted "schema"."view"
+* Fix 'invalid connection option "dsn"' ([issue 1373](https://github.com/dbcli/pgcli/issues/1373)).
+* Fix explain mode when used with `expand`, `auto_expand`, or `--explain-vertical-output` ([issue 1393](https://github.com/dbcli/pgcli/issues/1393)).
+* Fix sql-insert format emits NULL as 'None' ([issue 1408](https://github.com/dbcli/pgcli/issues/1408)).
+* Improve check for prompt-toolkit 3.0.6 ([issue 1416](https://github.com/dbcli/pgcli/issues/1416)).
+* Allow specifying an `alias_map_file` in the config that will use
+  predetermined table aliases instead of generating aliases programmatically on
+  the fly
+* Fixed SQL error when there is a comment on the first line: ([issue 1403](https://github.com/dbcli/pgcli/issues/1403))
+* Fix wrong usage of prompt instead of confirm when confirm execution of destructive query
+
+Internal:
+---------
+
+* Drop support for Python 3.7 and add 3.12.
+
 3.5.0 (2022/09/15):
 ===================

--- a/pgcli/init.py
+++ b/pgcli/init.py
@ -1 +1 @@
-__version__ = "3.5.0"
+__version__ = "4.0.1"
--- a/pgcli/auth.py
+++ b/pgcli/auth.py
@ -26,7 +26,9 @@ def keyring_initialize(keyring_enabled, *, logger):

        try:
            keyring = importlib.import_module("keyring")
-        except Exception as e:  # ImportError for Python 2, ModuleNotFoundError for Python 3
+        except (
+            ModuleNotFoundError
+        ) as e:  # ImportError for Python 2, ModuleNotFoundError for Python 3
            logger.warning("import keyring failed: %r.", e)


--- a/pgcli/completion_refresher.py
+++ b/pgcli/completion_refresher.py
@ -6,7 +6,6 @@ from .pgcompleter import PGCompleter


 class CompletionRefresher:
-
    refreshers = OrderedDict()

    def __init__(self):
@ -39,7 +38,7 @@ class CompletionRefresher:
                args=(executor, special, callbacks, history, settings),
                name="completion_refresh",
            )
-            self._completer_thread.setDaemon(True)
+            self._completer_thread.daemon = True
            self._completer_thread.start()
            return [
                (None, None, None, "Auto-completion refresh started in the background.")
--- a/pgcli/explain_output_formatter.py
+++ b/pgcli/explain_output_formatter.py
@ -10,7 +10,8 @@ class ExplainOutputFormatter:
        self.max_width = max_width

    def format_output(self, cur, headers, **output_kwargs):
-        (data,) = cur.fetchone()
+        # explain query results should always contain 1 row each
+        [(data,)] = list(cur)
        explain_list = json.loads(data)
        visualizer = Visualizer(self.max_width)
        for explain in explain_list:
--- a/pgcli/magic.py
+++ b/pgcli/magic.py
@ -43,7 +43,7 @@ def pgcli_line_magic(line):
        u = conn.session.engine.url
        _logger.debug("New pgcli: %r", str(u))

-        pgcli.connect(u.database, u.host, u.username, u.port, u.password)
+        pgcli.connect_uri(str(u._replace(drivername="postgres")))
        conn._pgcli = pgcli

    # For convenience, print the connection alias
--- a/pgcli/main.py
+++ b/pgcli/main.py
@ -63,15 +63,14 @@ from .config import (
 )
 from .key_bindings import pgcli_bindings
 from .packages.formatter.sqlformatter import register_new_formatter
-from .packages.prompt_utils import confirm_destructive_query
+from .packages.prompt_utils import confirm, confirm_destructive_query
+from .packages.parseutils import is_destructive
+from .packages.parseutils import parse_destructive_warning
 from .__init__ import __version__

 click.disable_unicode_literals_warning = True

-try:
-    from urlparse import urlparse, unquote, parse_qs
-except ImportError:
-    from urllib.parse import urlparse, unquote, parse_qs
+from urllib.parse import urlparse

 from getpass import getuser

@ -201,6 +200,9 @@ class PGCli:
        self.multiline_mode = c["main"].get("multi_line_mode", "psql")
        self.vi_mode = c["main"].as_bool("vi")
        self.auto_expand = auto_vertical_output or c["main"].as_bool("auto_expand")
+        self.auto_retry_closed_connection = c["main"].as_bool(
+            "auto_retry_closed_connection"
+        )
        self.expanded_output = c["main"].as_bool("expand")
        self.pgspecial.timing_enabled = c["main"].as_bool("timing")
        if row_limit is not None:
@ -224,11 +226,16 @@ class PGCli:
        self.syntax_style = c["main"]["syntax_style"]
        self.cli_style = c["colors"]
        self.wider_completion_menu = c["main"].as_bool("wider_completion_menu")
-        self.destructive_warning = warn or c["main"]["destructive_warning"]
-        # also handle boolean format of destructive warning
-        self.destructive_warning = {"true": "all", "false": "off"}.get(
-            self.destructive_warning.lower(), self.destructive_warning
+        self.destructive_warning = parse_destructive_warning(
+            warn or c["main"].as_list("destructive_warning")
        )
+        self.destructive_warning_restarts_connection = c["main"].as_bool(
+            "destructive_warning_restarts_connection"
+        )
+        self.destructive_statements_require_transaction = c["main"].as_bool(
+            "destructive_statements_require_transaction"
+        )
+
        self.less_chatty = bool(less_chatty) or c["main"].as_bool("less_chatty")
        self.null_string = c["main"].get("null_string", "<null>")
        self.prompt_format = (
@ -258,6 +265,9 @@ class PGCli:
        # Initialize completer
        smart_completion = c["main"].as_bool("smart_completion")
        keyword_casing = c["main"]["keyword_casing"]
+        single_connection = single_connection or c["main"].as_bool(
+            "always_use_single_connection"
+        )
        self.settings = {
            "casing_file": get_casing_file(c),
            "generate_casing_file": c["main"].as_bool("generate_casing_file"),
@ -269,6 +279,7 @@ class PGCli:
            "single_connection": single_connection,
            "less_chatty": less_chatty,
            "keyword_casing": keyword_casing,
+            "alias_map_file": c["main"]["alias_map_file"] or None,
        }

        completer = PGCompleter(
@ -292,7 +303,6 @@ class PGCli:
        raise PgCliQuitError

    def register_special_commands(self):
-
        self.pgspecial.register(
            self.change_db,
            "\\c",
@ -354,6 +364,23 @@ class PGCli:
            "Change the table format used to output results",
        )

+        self.pgspecial.register(
+            self.echo,
+            "\\echo",
+            "\\echo [string]",
+            "Echo a string to stdout",
+        )
+
+        self.pgspecial.register(
+            self.echo,
+            "\\qecho",
+            "\\qecho [string]",
+            "Echo a string to the query output channel.",
+        )
+
+    def echo(self, pattern, **_):
+        return [(None, None, None, pattern)]
+
    def change_table_format(self, pattern, **_):
        try:
            if pattern not in TabularOutputFormatter().supported_formats:
@ -423,12 +450,20 @@ class PGCli:
        except OSError as e:
            return [(None, None, None, str(e), "", False, True)]

-        if (
-            self.destructive_warning != "off"
-            and confirm_destructive_query(query, self.destructive_warning) is False
-        ):
-            message = "Wise choice. Command execution stopped."
-            return [(None, None, None, message)]
+        if self.destructive_warning:
+            if (
+                self.destructive_statements_require_transaction
+                and not self.pgexecute.valid_transaction()
+                and is_destructive(query, self.destructive_warning)
+            ):
+                message = "Destructive statements must be run within a transaction. Command execution stopped."
+                return [(None, None, None, message)]
+            destroy = confirm_destructive_query(
+                query, self.destructive_warning, self.dsn_alias
+            )
+            if destroy is False:
+                message = "Wise choice. Command execution stopped."
+                return [(None, None, None, message)]

        on_error_resume = self.on_error == "RESUME"
        return self.pgexecute.run(
@ -456,7 +491,6 @@ class PGCli:
        return [(None, None, None, message, "", True, True)]

    def initialize_logging(self):
-
        log_file = self.config["main"]["log_file"]
        if log_file == "default":
            log_file = config_location() + "log"
@ -687,34 +721,52 @@ class PGCli:
            editor_command = special.editor_command(text)
        return text

-    def execute_command(self, text):
+    def execute_command(self, text, handle_closed_connection=True):
        logger = self.logger

        query = MetaQuery(query=text, successful=False)

        try:
-            if self.destructive_warning != "off":
-                destroy = confirm = confirm_destructive_query(
-                    text, self.destructive_warning
+            if self.destructive_warning:
+                if (
+                    self.destructive_statements_require_transaction
+                    and not self.pgexecute.valid_transaction()
+                    and is_destructive(text, self.destructive_warning)
+                ):
+                    click.secho(
+                        "Destructive statements must be run within a transaction."
+                    )
+                    raise KeyboardInterrupt
+                destroy = confirm_destructive_query(
+                    text, self.destructive_warning, self.dsn_alias
                )
                if destroy is False:
                    click.secho("Wise choice!")
                    raise KeyboardInterrupt
                elif destroy:
                    click.secho("Your call!")
+
            output, query = self._evaluate_command(text)
        except KeyboardInterrupt:
-            # Restart connection to the database
-            self.pgexecute.connect()
-            logger.debug("cancelled query, sql: %r", text)
-            click.secho("cancelled query", err=True, fg="red")
+            if self.destructive_warning_restarts_connection:
+                # Restart connection to the database
+                self.pgexecute.connect()
+                logger.debug("cancelled query and restarted connection, sql: %r", text)
+                click.secho(
+                    "cancelled query and restarted connection", err=True, fg="red"
+                )
+            else:
+                logger.debug("cancelled query, sql: %r", text)
+                click.secho("cancelled query", err=True, fg="red")
        except NotImplementedError:
            click.secho("Not Yet Implemented.", fg="yellow")
        except OperationalError as e:
            logger.error("sql: %r, error: %r", text, e)
            logger.error("traceback: %r", traceback.format_exc())
-            self._handle_server_closed_connection(text)
-        except (PgCliQuitError, EOFError) as e:
+            click.secho(str(e), err=True, fg="red")
+            if handle_closed_connection:
+                self._handle_server_closed_connection(text)
+        except (PgCliQuitError, EOFError):
            raise
        except Exception as e:
            logger.error("sql: %r, error: %r", text, e)
@ -722,7 +774,9 @@ class PGCli:
            click.secho(str(e), err=True, fg="red")
        else:
            try:
-                if self.output_file and not text.startswith(("\\o ", "\\? ")):
+                if self.output_file and not text.startswith(
+                    ("\\o ", "\\? ", "\\echo ")
+                ):
                    try:
                        with open(self.output_file, "a", encoding="utf-8") as f:
                            click.echo(text, file=f)
@ -766,6 +820,34 @@ class PGCli:
                logger.debug("Search path: %r", self.completer.search_path)
        return query

+    def _check_ongoing_transaction_and_allow_quitting(self):
+        """Return whether we can really quit, possibly by asking the
+        user to confirm so if there is an ongoing transaction.
+        """
+        if not self.pgexecute.valid_transaction():
+            return True
+        while 1:
+            try:
+                choice = click.prompt(
+                    "A transaction is ongoing. Choose `c` to COMMIT, `r` to ROLLBACK, `a` to abort exit.",
+                    default="a",
+                )
+            except click.Abort:
+                # Print newline if user aborts with `^C`, otherwise
+                # pgcli's prompt will be printed on the same line
+                # (just after the confirmation prompt).
+                click.echo(None, err=False)
+                choice = "a"
+            choice = choice.lower()
+            if choice == "a":
+                return False  # do not quit
+            if choice == "c":
+                query = self.execute_command("commit")
+                return query.successful  # quit only if query is successful
+            if choice == "r":
+                query = self.execute_command("rollback")
+                return query.successful  # quit only if query is successful
+
    def run_cli(self):
        logger = self.logger

@ -788,6 +870,10 @@ class PGCli:
                    text = self.prompt_app.prompt()
                except KeyboardInterrupt:
                    continue
+                except EOFError:
+                    if not self._check_ongoing_transaction_and_allow_quitting():
+                        continue
+                    raise

                try:
                    text = self.handle_editor_command(text)
@ -797,7 +883,12 @@ class PGCli:
                    click.secho(str(e), err=True, fg="red")
                    continue

-                self.handle_watch_command(text)
+                try:
+                    self.handle_watch_command(text)
+                except PgCliQuitError:
+                    if not self._check_ongoing_transaction_and_allow_quitting():
+                        continue
+                    raise

                self.now = dt.datetime.today()

@ -1036,10 +1127,17 @@ class PGCli:
            click.secho("Reconnecting...", fg="green")
            self.pgexecute.connect()
            click.secho("Reconnected!", fg="green")
-            self.execute_command(text)
        except OperationalError as e:
            click.secho("Reconnect Failed", fg="red")
            click.secho(str(e), err=True, fg="red")
+        else:
+            retry = self.auto_retry_closed_connection or confirm(
+                "Run the query from before reconnecting?"
+            )
+            if retry:
+                click.secho("Running query...", fg="green")
+                # Don't get stuck in a retry loop
+                self.execute_command(text, handle_closed_connection=False)

    def refresh_completions(self, history=None, persist_priorities="all"):
        """Refresh outdated completions
@ -1266,7 +1364,6 @@ class PGCli:
@click.option(
    "--warn",
    default=None,
-    type=click.Choice(["all", "moderate", "off"]),
    help="Warn before running a destructive query.",
 )
@click.option(
@ -1575,7 +1672,8 @@ def format_output(title, cur, headers, status, settings, explain_mode=False):
        first_line = next(formatted)
        formatted = itertools.chain([first_line], formatted)
        if (
-            not expanded
+            not explain_mode
+            and not expanded
            and max_width
            and len(strip_ansi(first_line)) > max_width
            and headers
--- a/pgcli/packages/formatter/sqlformatter.py
+++ b/pgcli/packages/formatter/sqlformatter.py
@ -14,10 +14,13 @@ preprocessors = ()


 def escape_for_sql_statement(value):
+    if value is None:
+        return "NULL"
+
    if isinstance(value, bytes):
        return f"X'{value.hex()}'"
-    else:
-        return "'{}'".format(value)
+
+    return "'{}'".format(value)


 def adapter(data, headers, table_format=None, **kwargs):
@ -29,7 +32,7 @@ def adapter(data, headers, table_format=None, **kwargs):
        else:
            table_name = table[1]
    else:
-        table_name = '"DUAL"'
+        table_name = "DUAL"
    if table_format == "sql-insert":
        h = '", "'.join(headers)
        yield 'INSERT INTO "{}" ("{}") VALUES'.format(table_name, h)
--- a/pgcli/packages/parseutils/init.py
+++ b/pgcli/packages/parseutils/init.py
@ -1,6 +1,17 @@
 import sqlparse


+BASE_KEYWORDS = [
+    "drop",
+    "shutdown",
+    "delete",
+    "truncate",
+    "alter",
+    "unconditional_update",
+]
+ALL_KEYWORDS = BASE_KEYWORDS + ["update"]
+
+
 def query_starts_with(formatted_sql, prefixes):
    """Check if the query starts with any item from *prefixes*."""
    prefixes = [prefix.lower() for prefix in prefixes]
@ -13,22 +24,35 @@ def query_is_unconditional_update(formatted_sql):
    return bool(tokens) and tokens[0] == "update" and "where" not in tokens


-def query_is_simple_update(formatted_sql):
-    """Check if the query starts with UPDATE."""
-    tokens = formatted_sql.split()
-    return bool(tokens) and tokens[0] == "update"
-
-
-def is_destructive(queries, warning_level="all"):
+def is_destructive(queries, keywords):
    """Returns if any of the queries in *queries* is destructive."""
-    keywords = ("drop", "shutdown", "delete", "truncate", "alter")
    for query in sqlparse.split(queries):
        if query:
            formatted_sql = sqlparse.format(query.lower(), strip_comments=True).strip()
+            if "unconditional_update" in keywords and query_is_unconditional_update(
+                formatted_sql
+            ):
+                return True
            if query_starts_with(formatted_sql, keywords):
                return True
-            if query_is_unconditional_update(formatted_sql):
-                return True
-            if warning_level == "all" and query_is_simple_update(formatted_sql):
-                return True
    return False
+
+
+def parse_destructive_warning(warning_level):
+    """Converts a deprecated destructive warning option to a list of command keywords."""
+    if not warning_level:
+        return []
+
+    if not isinstance(warning_level, list):
+        if "," in warning_level:
+            return warning_level.split(",")
+        warning_level = [warning_level]
+
+    return {
+        "true": ALL_KEYWORDS,
+        "false": [],
+        "all": ALL_KEYWORDS,
+        "moderate": BASE_KEYWORDS,
+        "off": [],
+        "": [],
+    }.get(warning_level[0], warning_level)
--- a/pgcli/packages/prompt_utils.py
+++ b/pgcli/packages/prompt_utils.py
@ -3,7 +3,7 @@ import click
 from .parseutils import is_destructive


-def confirm_destructive_query(queries, warning_level):
+def confirm_destructive_query(queries, keywords, alias):
    """Check if the query is destructive and prompts the user to confirm.

    Returns:
@ -12,11 +12,13 @@ def confirm_destructive_query(queries, warning_level):
    * False if the query is destructive and the user doesn't want to proceed.

    """
-    prompt_text = (
-        "You're about to run a destructive command.\n" "Do you want to proceed? (y/n)"
-    )
-    if is_destructive(queries, warning_level) and sys.stdin.isatty():
-        return prompt(prompt_text, type=bool)
+    info = "You're about to run a destructive command"
+    if alias:
+        info += f" in {click.style(alias, fg='red')}"
+
+    prompt_text = f"{info}.\nDo you want to proceed?"
+    if is_destructive(queries, keywords) and sys.stdin.isatty():
+        return confirm(prompt_text)


 def confirm(*args, **kwargs):
--- a/pgcli/packages/sqlcompletion.py
+++ b/pgcli/packages/sqlcompletion.py
@ -290,7 +290,6 @@ def suggest_special(text):


 def suggest_based_on_last_token(token, stmt):
-
    if isinstance(token, str):
        token_v = token.lower()
    elif isinstance(token, Comparison):
@ -399,7 +398,6 @@ def suggest_based_on_last_token(token, stmt):
    elif (token_v.endswith("join") and token.is_keyword) or (
        token_v in ("copy", "from", "update", "into", "describe", "truncate")
    ):
-
        schema = stmt.get_identifier_schema()
        tables = extract_tables(stmt.text_before_cursor)
        is_join = token_v.endswith("join") and token.is_keyword
@ -436,7 +434,6 @@ def suggest_based_on_last_token(token, stmt):
        try:
            prev = stmt.get_previous_token(token).value.lower()
            if prev in ("drop", "alter", "create", "create or replace"):
-
                # Suggest functions from either the currently-selected schema or the
                # public schema if no schema has been specified
                suggest = []
--- a/pgcli/pgclirc
+++ b/pgcli/pgclirc
@ -9,6 +9,10 @@ smart_completion = True
 # visible.)
 wider_completion_menu = False

+# Do not create new connections for refreshing completions; Equivalent to
+# always running with the --single-connection flag.
+always_use_single_connection = False
+
 # Multi-line mode allows breaking up the sql statements into multiple lines. If
 # this is set to True, then the end of the statements must have a semi-colon.
 # If this is set to False then sql statements can't be split into multiple
@ -22,14 +26,22 @@ multi_line = False
 # a command.
 multi_line_mode = psql

-# Destructive warning mode will alert you before executing a sql statement
+# Destructive warning will alert you before executing a sql statement
 # that may cause harm to the database such as "drop table", "drop database",
 # "shutdown", "delete", or "update".
-# Possible values:
-# "all" - warn on data definition statements, server actions such as SHUTDOWN, DELETE or UPDATE
-# "moderate" - skip warning on UPDATE statements, except for unconditional updates
-# "off" - skip all warnings
-destructive_warning = all
+# You can pass a list of destructive commands or leave it empty if you want to skip all warnings.
+# "unconditional_update" will warn you of update statements that don't have a where clause
+destructive_warning = drop, shutdown, delete, truncate, alter, update, unconditional_update
+
+# Destructive warning can restart the connection if this is enabled and the
+# user declines. This means that any current uncommitted transaction can be
+# aborted if the user doesn't want to proceed with a destructive_warning
+# statement.
+destructive_warning_restarts_connection = False
+
+# When this option is on (and if `destructive_warning` is not empty),
+# destructive statements are not executed when outside of a transaction.
+destructive_statements_require_transaction = False

 # Enables expand mode, which is similar to `\x` in psql.
 expand = False
@ -37,9 +49,21 @@ expand = False
 # Enables auto expand mode, which is similar to `\x auto` in psql.
 auto_expand = False

+# Auto-retry queries on connection failures and other operational errors. If
+# False, will prompt to rerun the failed query instead of auto-retrying.
+auto_retry_closed_connection = True
+
 # If set to True, table suggestions will include a table alias
 generate_aliases = False

+# Path to a json file that specifies specific table aliases to use when generate_aliases is set to True
+# the format for this file should be:
+# {
+#     "some_table_name": "desired_alias",
+#     "some_other_table_name": "another_alias"
+# }
+alias_map_file =
+
 # log_file location.
 # In Unix/Linux: ~/.config/pgcli/log
 # In Windows: %USERPROFILE%\AppData\Local\dbcli\pgcli\log
@ -83,9 +107,10 @@ qualify_columns = if_more_than_one_table
 # When no schema is entered, only suggest objects in search_path
 search_path_filter = False

-# Default pager.
-# By default 'PAGER' environment variable is used
-# pager = less -SRXF
+# Default pager. See https://www.pgcli.com/pager for more information on settings.
+# By default 'PAGER' environment variable is used. If the pager is less, and the 'LESS'
+# environment variable is not set, then LESS='-SRXF' will be automatically set.
+# pager = less

 # Timing of sql statements and table rendering.
 timing = True
@ -140,7 +165,7 @@ less_chatty = False
 # \i - Postgres PID
 # \# - "@" sign if logged in as superuser, '>' in other case
 # \n - Newline
-# \dsn_alias - name of dsn alias if -D option is used (empty otherwise)
+# \dsn_alias - name of dsn connection string alias if -D option is used (empty otherwise)
 # \x1b[...m - insert ANSI escape sequence
 # eg: prompt = '\x1b[35m\u@\x1b[32m\h:\x1b[36m\d>'
 prompt = '\u@\h:\d> '
@ -198,7 +223,8 @@ output.null = "#808080"
 # Named queries are queries you can execute by name.
 [named queries]

-# DSN to call by -D option
+# Here's where you can provide a list of connection string aliases.
+# You can use it by passing the -D option. `pgcli -D example_dsn`
 [alias_dsn]
 # example_dsn = postgresql://[user[:password]@][netloc][:port][/dbname]

--- a/pgcli/pgcompleter.py
+++ b/pgcli/pgcompleter.py
@ -1,3 +1,4 @@
+import json
 import logging
 import re
 from itertools import count, repeat, chain
@ -61,18 +62,38 @@ arg_default_type_strip_regex = re.compile(r"::[\w\.]+(\[\])?$")
 normalize_ref = lambda ref: ref if ref[0] == '"' else '"' + ref.lower() + '"'


-def generate_alias(tbl):
+def generate_alias(tbl, alias_map=None):
    """Generate a table alias, consisting of all upper-case letters in
    the table name, or, if there are no upper-case letters, the first letter +
    all letters preceded by _
    param tbl - unescaped name of the table to alias
    """
+    if alias_map and tbl in alias_map:
+        return alias_map[tbl]
    return "".join(
        [l for l in tbl if l.isupper()]
        or [l for l, prev in zip(tbl, "_" + tbl) if prev == "_" and l != "_"]
    )


+class InvalidMapFile(ValueError):
+    pass
+
+
+def load_alias_map_file(path):
+    try:
+        with open(path) as fo:
+            alias_map = json.load(fo)
+    except FileNotFoundError as err:
+        raise InvalidMapFile(
+            f"Cannot read alias_map_file - {err.filename} does not exist"
+        )
+    except json.JSONDecodeError:
+        raise InvalidMapFile(f"Cannot read alias_map_file - {path} is not valid json")
+    else:
+        return alias_map
+
+
 class PGCompleter(Completer):
    # keywords_tree: A dict mapping keywords to well known following keywords.
    # e.g. 'CREATE': ['TABLE', 'USER', ...],
@ -100,6 +121,11 @@ class PGCompleter(Completer):
        self.call_arg_oneliner_max = settings.get("call_arg_oneliner_max", 2)
        self.search_path_filter = settings.get("search_path_filter")
        self.generate_aliases = settings.get("generate_aliases")
+        alias_map_file = settings.get("alias_map_file")
+        if alias_map_file is not None:
+            self.alias_map = load_alias_map_file(alias_map_file)
+        else:
+            self.alias_map = None
        self.casing_file = settings.get("casing_file")
        self.insert_col_skip_patterns = [
            re.compile(pattern)
@ -157,7 +183,6 @@ class PGCompleter(Completer):
        self.all_completions.update(additional_keywords)

    def extend_schemata(self, schemata):
-
        # schemata is a list of schema names
        schemata = self.escaped_names(schemata)
        metadata = self.dbmetadata["tables"]
@ -226,7 +251,6 @@ class PGCompleter(Completer):
            self.all_completions.add(colname)

    def extend_functions(self, func_data):
-
        # func_data is a list of function metadata namedtuples

        # dbmetadata['schema_name']['functions']['function_name'] should return
@ -260,7 +284,6 @@ class PGCompleter(Completer):
        }

    def extend_foreignkeys(self, fk_data):
-
        # fk_data is a list of ForeignKey namedtuples, with fields
        # parentschema, childschema, parenttable, childtable,
        # parentcolumns, childcolumns
@ -283,7 +306,6 @@ class PGCompleter(Completer):
            parcolmeta.foreignkeys.append(fk)

    def extend_datatypes(self, type_data):
-
        # dbmetadata['datatypes'][schema_name][type_name] should store type
        # metadata, such as composite type field names. Currently, we're not
        # storing any metadata beyond typename, so just store None
@ -697,7 +719,6 @@ class PGCompleter(Completer):
        return self.find_matches(word_before_cursor, conds, meta="join")

    def get_function_matches(self, suggestion, word_before_cursor, alias=False):
-
        if suggestion.usage == "from":
            # Only suggest functions allowed in FROM clause

--- a/pgcli/pgexecute.py
+++ b/pgcli/pgexecute.py
@ -1,7 +1,7 @@
 import logging
 import traceback
 from collections import namedtuple
-
+import re
 import pgspecial as special
 import psycopg
 import psycopg.sql
@ -17,6 +17,27 @@ ViewDef = namedtuple(
 )


+# we added this funcion to strip beginning comments
+# because sqlparse didn't handle tem well.  It won't be needed if sqlparse
+# does parsing of this situation better
+
+
+def remove_beginning_comments(command):
+    # Regular expression pattern to match comments
+    pattern = r"^(/\*.*?\*/|--.*?)(?:\n|$)"
+
+    # Find and remove all comments from the beginning
+    cleaned_command = command
+    comments = []
+    match = re.match(pattern, cleaned_command, re.DOTALL)
+    while match:
+        comments.append(match.group())
+        cleaned_command = cleaned_command[len(match.group()) :].lstrip()
+        match = re.match(pattern, cleaned_command, re.DOTALL)
+
+    return [cleaned_command, comments]
+
+
 def register_typecasters(connection):
    """Casts date and timestamp values to string, resolves issues with out-of-range
    dates (e.g. BC) which psycopg can't handle"""
@ -76,7 +97,6 @@ class ProtocolSafeCursor(psycopg.Cursor):


 class PGExecute:
-
    # The boolean argument to the current_schemas function indicates whether
    # implicit schemas, e.g. pg_catalog
    search_path_query = """
@ -180,7 +200,6 @@ class PGExecute:
        dsn=None,
        **kwargs,
    ):
-
        conn_params = self._conn_params.copy()

        new_params = {
@ -203,7 +222,11 @@ class PGExecute:

        conn_params.update({k: v for k, v in new_params.items() if v})

-        conn_info = make_conninfo(**conn_params)
+        if "dsn" in conn_params:
+            other_params = {k: v for k, v in conn_params.items() if k != "dsn"}
+            conn_info = make_conninfo(conn_params["dsn"], **other_params)
+        else:
+            conn_info = make_conninfo(**conn_params)
        conn = psycopg.connect(conn_info)
        conn.cursor_factory = ProtocolSafeCursor

@ -309,21 +332,20 @@ class PGExecute:
        # sql parse doesn't split on a comment first + special
        # so we're going to do it

-        sqltemp = []
+        removed_comments = []
        sqlarr = []
+        cleaned_command = ""

-        if statement.startswith("--"):
-            sqltemp = statement.split("\n")
-            sqlarr.append(sqltemp[0])
-            for i in sqlparse.split(sqltemp[1]):
-                sqlarr.append(i)
-        elif statement.startswith("/*"):
-            sqltemp = statement.split("*/")
-            sqltemp[0] = sqltemp[0] + "*/"
-            for i in sqlparse.split(sqltemp[1]):
-                sqlarr.append(i)
-        else:
-            sqlarr = sqlparse.split(statement)
+        # could skip if statement doesn't match ^-- or ^/*
+        cleaned_command, removed_comments = remove_beginning_comments(statement)
+
+        sqlarr = sqlparse.split(cleaned_command)
+
+        # now re-add the beginning comments if there are any, so that they show up in
+        # log files etc when running these commands
+
+        if len(removed_comments) > 0:
+            sqlarr = removed_comments + sqlarr

        # run each sql query
        for sql in sqlarr:
@ -470,7 +492,7 @@ class PGExecute:
            return (
                psycopg.sql.SQL(template)
                .format(
-                    name=psycopg.sql.Identifier(f"{result.nspname}.{result.relname}"),
+                    name=psycopg.sql.Identifier(result.nspname, result.relname),
                    stmt=psycopg.sql.SQL(result.viewdef),
                )
                .as_string(self.conn)
--- a/pgcli/pgtoolbar.py
+++ b/pgcli/pgtoolbar.py
@ -1,18 +1,14 @@
-from pkg_resources import packaging
-
-import prompt_toolkit
 from prompt_toolkit.key_binding.vi_state import InputMode
 from prompt_toolkit.application import get_app

-parse_version = packaging.version.parse
-
 vi_modes = {
    InputMode.INSERT: "I",
    InputMode.NAVIGATION: "N",
    InputMode.REPLACE: "R",
    InputMode.INSERT_MULTIPLE: "M",
 }
-if parse_version(prompt_toolkit.__version__) >= parse_version("3.0.6"):
+# REPLACE_SINGLE is available in prompt_toolkit >= 3.0.6
+if "REPLACE_SINGLE" in {e.name for e in InputMode}:
    vi_modes[InputMode.REPLACE_SINGLE] = "R"


--- a/pgcli/pyev.py
+++ b/pgcli/pyev.py
@ -146,7 +146,7 @@ class Visualizer:
        elif self.explain.get("Max Rows") < plan["Actual Rows"]:
            self.explain["Max Rows"] = plan["Actual Rows"]

-        if not self.explain.get("MaxCost"):
+        if not self.explain.get("Max Cost"):
            self.explain["Max Cost"] = plan["Actual Cost"]
        elif self.explain.get("Max Cost") < plan["Actual Cost"]:
            self.explain["Max Cost"] = plan["Actual Cost"]
@ -171,7 +171,7 @@ class Visualizer:
            return self.warning_format("%.2f ms" % value)
        elif value < 60000:
            return self.critical_format(
-                "%.2f s" % (value / 2000.0),
+                "%.2f s" % (value / 1000.0),
            )
        else:
            return self.critical_format(
--- a/pyproject.toml
+++ b/pyproject.toml
@ -1,6 +1,6 @@
 [tool.black]
 line-length = 88
-target-version = ['py36']
+target-version = ['py38']
 include = '\.pyi?$'
 exclude = '''
 /(
@ -19,4 +19,3 @@ exclude = '''
  | tests/data
 )/
 '''
-
--- a/release.py
+++ b/release.py
@ -57,7 +57,7 @@ def version(version_file):

 def commit_for_release(version_file, ver):
    run_step("git", "reset")
-    run_step("git", "add", version_file)
+    run_step("git", "add", "-u")
    run_step("git", "commit", "--message", "Releasing version {}".format(ver))


--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@ -1,7 +1,7 @@
 pytest>=2.7.0
 tox>=1.9.2
 behave>=1.2.4
-black>=22.3.0
+black>=23.3.0
 pexpect==3.3; platform_system != "Windows"
 pre-commit>=1.16.0
 coverage>=5.0.4
--- a/setup.py
+++ b/setup.py
@ -51,7 +51,7 @@ setup(
        "keyring": ["keyring >= 12.2.0"],
        "sshtunnel": ["sshtunnel >= 0.4.0"],
    },
-    python_requires=">=3.7",
+    python_requires=">=3.8",
    entry_points="""
        [console_scripts]
        pgcli=pgcli.main:cli
@ -62,10 +62,11 @@ setup(
        "Operating System :: Unix",
        "Programming Language :: Python",
        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
        "Programming Language :: Python :: 3.8",
        "Programming Language :: Python :: 3.9",
        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
        "Programming Language :: SQL",
        "Topic :: Database",
        "Topic :: Database :: Front-Ends",
--- a/tests/features/basic_commands.feature
+++ b/tests/features/basic_commands.feature
@ -23,6 +23,30 @@ Feature: run the cli,
     When we send "ctrl + d"
      then dbcli exits

+  Scenario: confirm exit when a transaction is ongoing
+     When we begin transaction
+      and we try to send "ctrl + d"
+      then we see ongoing transaction message
+      when we send "c"
+      then dbcli exits
+
+  Scenario: cancel exit when a transaction is ongoing
+     When we begin transaction
+      and we try to send "ctrl + d"
+      then we see ongoing transaction message
+      when we send "a"
+      then we see dbcli prompt
+      when we rollback transaction
+      when we send "ctrl + d"
+      then dbcli exits
+
+  Scenario: interrupt current query via "ctrl + c"
+     When we send sleep query
+      and we send "ctrl + c"
+      then we see cancelled query warning
+      when we check for any non-idle sleep queries
+      then we don't see any non-idle sleep queries
+
  Scenario: list databases
      When we list databases
      then we see list of databases
--- a/tests/features/crud_database.feature
+++ b/tests/features/crud_database.feature
@ -5,7 +5,7 @@ Feature: manipulate databases:
     When we create database
      then we see database created
      when we drop database
-      then we confirm the destructive warning
+      then we respond to the destructive warning: y
      then we see database dropped
      when we connect to dbserver
      then we see database connected
--- a/tests/features/crud_table.feature
+++ b/tests/features/crud_table.feature
@ -8,15 +8,38 @@ Feature: manipulate tables:
      then we see table created
      when we insert into table
      then we see record inserted
+      when we select from table
+      then we see data selected: initial
      when we update table
      then we see record updated
      when we select from table
-      then we see data selected
+      then we see data selected: updated
      when we delete from table
-      then we confirm the destructive warning
+      then we respond to the destructive warning: y
      then we see record deleted
      when we drop table
-      then we confirm the destructive warning
+      then we respond to the destructive warning: y
      then we see table dropped
      when we connect to dbserver
      then we see database connected
+
+  Scenario: transaction handling, with cancelling on a destructive warning.
+    When we connect to test database
+      then we see database connected
+      when we create table
+      then we see table created
+      when we begin transaction
+      then we see transaction began
+      when we insert into table
+      then we see record inserted
+      when we delete from table
+      then we respond to the destructive warning: n
+      when we select from table
+      then we see data selected: initial
+      when we rollback transaction
+      then we see transaction rolled back
+      when we select from table
+      then we see select output without data
+      when we drop table
+      then we respond to the destructive warning: y
+      then we see table dropped
--- a/tests/features/environment.py
+++ b/tests/features/environment.py
@ -164,10 +164,24 @@ def before_step(context, _):
    context.atprompt = False


+def is_known_problem(scenario):
+    """TODO: why is this not working in 3.12?"""
+    if sys.version_info >= (3, 12):
+        return scenario.name in (
+            'interrupt current query via "ctrl + c"',
+            "run the cli with --username",
+            "run the cli with --user",
+            "run the cli with --port",
+        )
+    return False
+
+
 def before_scenario(context, scenario):
    if scenario.name == "list databases":
        # not using the cli for that
        return
+    if is_known_problem(scenario):
+        scenario.skip()
    currentdb = None
    if "pgbouncer" in scenario.feature.tags:
        if context.pgbouncer_available:
--- a/tests/features/expanded.feature
+++ b/tests/features/expanded.feature
@ -7,7 +7,7 @@ Feature: expanded mode:
      and we select from table
      then we see expanded data selected
      when we drop table
-      then we confirm the destructive warning
+      then we respond to the destructive warning: y
      then we see table dropped

  Scenario: expanded off
@ -16,7 +16,7 @@ Feature: expanded mode:
      and we select from table
      then we see nonexpanded data selected
      when we drop table
-      then we confirm the destructive warning
+      then we respond to the destructive warning: y
      then we see table dropped

  Scenario: expanded auto
@ -25,5 +25,5 @@ Feature: expanded mode:
      and we select from table
      then we see auto data selected
      when we drop table
-      then we confirm the destructive warning
+      then we respond to the destructive warning: y
      then we see table dropped
--- a/tests/features/steps/basic_commands.py
+++ b/tests/features/steps/basic_commands.py
@ -64,13 +64,83 @@ def step_ctrl_d(context):
    """
    Send Ctrl + D to hopefully exit.
    """
+    step_try_to_ctrl_d(context)
+    context.cli.expect(pexpect.EOF, timeout=5)
+    context.exit_sent = True
+
+
+@when('we try to send "ctrl + d"')
+def step_try_to_ctrl_d(context):
+    """
+    Send Ctrl + D, perhaps exiting, perhaps not (if a transaction is
+    ongoing).
+    """
    # turn off pager before exiting
    context.cli.sendcontrol("c")
    context.cli.sendline(r"\pset pager off")
    wrappers.wait_prompt(context)
    context.cli.sendcontrol("d")
-    context.cli.expect(pexpect.EOF, timeout=5)
-    context.exit_sent = True
+
+
+@when('we send "ctrl + c"')
+def step_ctrl_c(context):
+    """Send Ctrl + c to hopefully interrupt."""
+    context.cli.sendcontrol("c")
+
+
+@then("we see cancelled query warning")
+def step_see_cancelled_query_warning(context):
+    """
+    Make sure we receive the warning that the current query was cancelled.
+    """
+    wrappers.expect_exact(context, "cancelled query", timeout=2)
+
+
+@then("we see ongoing transaction message")
+def step_see_ongoing_transaction_error(context):
+    """
+    Make sure we receive the warning that a transaction is ongoing.
+    """
+    context.cli.expect("A transaction is ongoing.", timeout=2)
+
+
+@when("we send sleep query")
+def step_send_sleep_15_seconds(context):
+    """
+    Send query to sleep for 15 seconds.
+    """
+    context.cli.sendline("select pg_sleep(15)")
+
+
+@when("we check for any non-idle sleep queries")
+def step_check_for_active_sleep_queries(context):
+    """
+    Send query to check for any non-idle pg_sleep queries.
+    """
+    context.cli.sendline(
+        "select state from pg_stat_activity where query not like '%pg_stat_activity%' and query like '%pg_sleep%' and state != 'idle';"
+    )
+
+
+@then("we don't see any non-idle sleep queries")
+def step_no_active_sleep_queries(context):
+    """Confirm that any pg_sleep queries are either idle or not active."""
+    wrappers.expect_exact(
+        context,
+        context.conf["pager_boundary"]
+        + "\r"
+        + dedent(
+            """
+            +-------+\r
+            | state |\r
+            |-------|\r
+            +-------+\r
+            SELECT 0\r
+        """
+        )
+        + context.conf["pager_boundary"],
+        timeout=5,
+    )


@when(r'we send "\?" command')
@ -131,18 +201,31 @@ def step_see_found(context):
    )


-@then("we confirm the destructive warning")
-def step_confirm_destructive_command(context):
-    """Confirm destructive command."""
+@then("we respond to the destructive warning: {response}")
+def step_resppond_to_destructive_command(context, response):
+    """Respond to destructive command."""
    wrappers.expect_exact(
        context,
-        "You're about to run a destructive command.\r\nDo you want to proceed? (y/n):",
+        "You're about to run a destructive command.\r\nDo you want to proceed? [y/N]:",
        timeout=2,
    )
-    context.cli.sendline("y")
+    context.cli.sendline(response.strip())


@then("we send password")
 def step_send_password(context):
    wrappers.expect_exact(context, "Password for", timeout=5)
    context.cli.sendline(context.conf["pass"] or "DOES NOT MATTER")
+
+
+@when('we send "{text}"')
+def step_send_text(context, text):
+    context.cli.sendline(text)
+    # Try to detect whether we are exiting. If so, set `exit_sent`
+    # so that `after_scenario` correctly cleans up.
+    try:
+        context.cli.expect(pexpect.EOF, timeout=0.2)
+    except pexpect.TIMEOUT:
+        pass
+    else:
+        context.exit_sent = True
--- a/tests/features/steps/crud_table.py
+++ b/tests/features/steps/crud_table.py
@ -9,6 +9,10 @@ from textwrap import dedent
 import wrappers


+INITIAL_DATA = "xxx"
+UPDATED_DATA = "yyy"
+
+
@when("we create table")
 def step_create_table(context):
    """
@ -22,7 +26,7 @@ def step_insert_into_table(context):
    """
    Send insert into table.
    """
-    context.cli.sendline("""insert into a(x) values('xxx');""")
+    context.cli.sendline(f"""insert into a(x) values('{INITIAL_DATA}');""")


@when("we update table")
@ -30,7 +34,9 @@ def step_update_table(context):
    """
    Send insert into table.
    """
-    context.cli.sendline("""update a set x = 'yyy' where x = 'xxx';""")
+    context.cli.sendline(
+        f"""update a set x = '{UPDATED_DATA}' where x = '{INITIAL_DATA}';"""
+    )


@when("we select from table")
@ -46,7 +52,7 @@ def step_delete_from_table(context):
    """
    Send deete from table.
    """
-    context.cli.sendline("""delete from a where x = 'yyy';""")
+    context.cli.sendline(f"""delete from a where x = '{UPDATED_DATA}';""")


@when("we drop table")
@ -57,6 +63,30 @@ def step_drop_table(context):
    context.cli.sendline("drop table a;")


+@when("we alter the table")
+def step_alter_table(context):
+    """
+    Alter the table by adding a column.
+    """
+    context.cli.sendline("""alter table a add column y varchar;""")
+
+
+@when("we begin transaction")
+def step_begin_transaction(context):
+    """
+    Begin transaction
+    """
+    context.cli.sendline("begin;")
+
+
+@when("we rollback transaction")
+def step_rollback_transaction(context):
+    """
+    Rollback transaction
+    """
+    context.cli.sendline("rollback;")
+
+
@then("we see table created")
 def step_see_table_created(context):
    """
@ -81,21 +111,42 @@ def step_see_record_updated(context):
    wrappers.expect_pager(context, "UPDATE 1\r\n", timeout=2)


-@then("we see data selected")
-def step_see_data_selected(context):
+@then("we see data selected: {data}")
+def step_see_data_selected(context, data):
    """
-    Wait to see select output.
+    Wait to see select output with initial or updated data.
+    """
+    x = UPDATED_DATA if data == "updated" else INITIAL_DATA
+    wrappers.expect_pager(
+        context,
+        dedent(
+            f"""\
+            +-----+\r
+            | x   |\r
+            |-----|\r
+            | {x} |\r
+            +-----+\r
+            SELECT 1\r
+        """
+        ),
+        timeout=1,
+    )
+
+
+@then("we see select output without data")
+def step_see_no_data_selected(context):
+    """
+    Wait to see select output without data.
    """
    wrappers.expect_pager(
        context,
        dedent(
            """\
-            +-----+\r
-            | x   |\r
-            |-----|\r
-            | yyy |\r
-            +-----+\r
-            SELECT 1\r
+            +---+\r
+            | x |\r
+            |---|\r
+            +---+\r
+            SELECT 0\r
        """
        ),
        timeout=1,
@ -116,3 +167,19 @@ def step_see_table_dropped(context):
    Wait to see drop output.
    """
    wrappers.expect_pager(context, "DROP TABLE\r\n", timeout=2)
+
+
+@then("we see transaction began")
+def step_see_transaction_began(context):
+    """
+    Wait to see transaction began.
+    """
+    wrappers.expect_pager(context, "BEGIN\r\n", timeout=2)
+
+
+@then("we see transaction rolled back")
+def step_see_transaction_rolled_back(context):
+    """
+    Wait to see transaction rollback.
+    """
+    wrappers.expect_pager(context, "ROLLBACK\r\n", timeout=2)
--- a/tests/features/steps/expanded.py
+++ b/tests/features/steps/expanded.py
@ -16,7 +16,7 @@ def step_prepare_data(context):
    context.cli.sendline("drop table if exists a;")
    wrappers.expect_exact(
        context,
-        "You're about to run a destructive command.\r\nDo you want to proceed? (y/n):",
+        "You're about to run a destructive command.\r\nDo you want to proceed? [y/N]:",
        timeout=2,
    )
    context.cli.sendline("y")
--- a/tests/features/steps/wrappers.py
+++ b/tests/features/steps/wrappers.py
@ -3,10 +3,7 @@ import pexpect
 from pgcli.main import COLOR_CODE_REGEX
 import textwrap

-try:
-    from StringIO import StringIO
-except ImportError:
-    from io import StringIO
+from io import StringIO


 def expect_exact(context, expected, timeout):
--- a/tests/formatter/test_sqlformatter.py
+++ b/tests/formatter/test_sqlformatter.py
@ -34,7 +34,7 @@ def test_output_sql_insert():
            "Jackson",
            "jackson_test@gmail.com",
            "132454789",
-            "",
+            None,
            "2022-09-09 19:44:32.712343+08",
            "2022-09-09 19:44:32.712343+08",
        ]
@ -58,7 +58,7 @@ def test_output_sql_insert():
    output_list = [l for l in output]
    expected = [
        'INSERT INTO "user" ("id", "name", "email", "phone", "description", "created_at", "updated_at") VALUES',
-        "  ('1', 'Jackson', 'jackson_test@gmail.com', '132454789', '', "
+        "  ('1', 'Jackson', 'jackson_test@gmail.com', '132454789', NULL, "
        + "'2022-09-09 19:44:32.712343+08', '2022-09-09 19:44:32.712343+08')",
        ";",
    ]
--- a/tests/parseutils/test_parseutils.py
+++ b/tests/parseutils/test_parseutils.py
@ -1,5 +1,10 @@
 import pytest
-from pgcli.packages.parseutils import is_destructive
+from pgcli.packages.parseutils import (
+    is_destructive,
+    parse_destructive_warning,
+    BASE_KEYWORDS,
+    ALL_KEYWORDS,
+)
 from pgcli.packages.parseutils.tables import extract_tables
 from pgcli.packages.parseutils.utils import find_prev_keyword, is_open_quote

@ -263,18 +268,43 @@ def test_is_open_quote__open(sql):


@pytest.mark.parametrize(
-    ("sql", "warning_level", "expected"),
+    ("sql", "keywords", "expected"),
    [
-        ("update abc set x = 1", "all", True),
-        ("update abc set x = 1 where y = 2", "all", True),
-        ("update abc set x = 1", "moderate", True),
-        ("update abc set x = 1 where y = 2", "moderate", False),
-        ("select x, y, z from abc", "all", False),
-        ("drop abc", "all", True),
-        ("alter abc", "all", True),
-        ("delete abc", "all", True),
-        ("truncate abc", "all", True),
+        ("update abc set x = 1", ALL_KEYWORDS, True),
+        ("update abc set x = 1 where y = 2", ALL_KEYWORDS, True),
+        ("update abc set x = 1", BASE_KEYWORDS, True),
+        ("update abc set x = 1 where y = 2", BASE_KEYWORDS, False),
+        ("select x, y, z from abc", ALL_KEYWORDS, False),
+        ("drop abc", ALL_KEYWORDS, True),
+        ("alter abc", ALL_KEYWORDS, True),
+        ("delete abc", ALL_KEYWORDS, True),
+        ("truncate abc", ALL_KEYWORDS, True),
+        ("insert into abc values (1, 2, 3)", ALL_KEYWORDS, False),
+        ("insert into abc values (1, 2, 3)", BASE_KEYWORDS, False),
+        ("insert into abc values (1, 2, 3)", ["insert"], True),
+        ("insert into abc values (1, 2, 3)", ["insert"], True),
    ],
 )
-def test_is_destructive(sql, warning_level, expected):
-    assert is_destructive(sql, warning_level=warning_level) == expected
+def test_is_destructive(sql, keywords, expected):
+    assert is_destructive(sql, keywords) == expected
+
+
+@pytest.mark.parametrize(
+    ("warning_level", "expected"),
+    [
+        ("true", ALL_KEYWORDS),
+        ("false", []),
+        ("all", ALL_KEYWORDS),
+        ("moderate", BASE_KEYWORDS),
+        ("off", []),
+        ("", []),
+        (None, []),
+        (ALL_KEYWORDS, ALL_KEYWORDS),
+        (BASE_KEYWORDS, BASE_KEYWORDS),
+        ("insert", ["insert"]),
+        ("drop,alter,delete", ["drop", "alter", "delete"]),
+        (["drop", "alter", "delete"], ["drop", "alter", "delete"]),
+    ],
+)
+def test_parse_destructive_warning(warning_level, expected):
+    assert parse_destructive_warning(warning_level) == expected
--- a/tests/test_main.py
+++ b/tests/test_main.py
@ -216,7 +216,6 @@ def pset_pager_mocks():
    with mock.patch("pgcli.main.click.echo") as mock_echo, mock.patch(
        "pgcli.main.click.echo_via_pager"
    ) as mock_echo_via_pager, mock.patch.object(cli, "prompt_app") as mock_app:
-
        yield cli, mock_echo, mock_echo_via_pager, mock_app


@ -297,6 +296,22 @@ def test_i_works(tmpdir, executor):
    run(executor, statement, pgspecial=cli.pgspecial)


+@dbtest
+def test_echo_works(executor):
+    cli = PGCli(pgexecute=executor)
+    statement = r"\echo asdf"
+    result = run(executor, statement, pgspecial=cli.pgspecial)
+    assert result == ["asdf"]
+
+
+@dbtest
+def test_qecho_works(executor):
+    cli = PGCli(pgexecute=executor)
+    statement = r"\qecho asdf"
+    result = run(executor, statement, pgspecial=cli.pgspecial)
+    assert result == ["asdf"]
+
+
@dbtest
 def test_watch_works(executor):
    cli = PGCli(pgexecute=executor)
@ -371,7 +386,6 @@ def test_quoted_db_uri(tmpdir):


 def test_pg_service_file(tmpdir):
-
    with mock.patch.object(PGCli, "connect") as mock_connect:
        cli = PGCli(pgclirc_file=str(tmpdir.join("rcfile")))
        with open(tmpdir.join(".pg_service.conf").strpath, "w") as service_conf:
--- a/tests/test_pgcompleter.py
+++ b/tests/test_pgcompleter.py
@ -0,0 +1,76 @@
+import pytest
+from pgcli import pgcompleter
+
+
+def test_load_alias_map_file_missing_file():
+    with pytest.raises(
+        pgcompleter.InvalidMapFile,
+        match=r"Cannot read alias_map_file - /path/to/non-existent/file.json does not exist$",
+    ):
+        pgcompleter.load_alias_map_file("/path/to/non-existent/file.json")
+
+
+def test_load_alias_map_file_invalid_json(tmp_path):
+    fpath = tmp_path / "foo.json"
+    fpath.write_text("this is not valid json")
+    with pytest.raises(pgcompleter.InvalidMapFile, match=r".*is not valid json$"):
+        pgcompleter.load_alias_map_file(str(fpath))
+
+
+@pytest.mark.parametrize(
+    "table_name, alias",
+    [
+        ("SomE_Table", "SET"),
+        ("SOmeTabLe", "SOTL"),
+        ("someTable", "T"),
+    ],
+)
+def test_generate_alias_uses_upper_case_letters_from_name(table_name, alias):
+    assert pgcompleter.generate_alias(table_name) == alias
+
+
+@pytest.mark.parametrize(
+    "table_name, alias",
+    [
+        ("some_tab_le", "stl"),
+        ("s_ome_table", "sot"),
+        ("sometable", "s"),
+    ],
+)
+def test_generate_alias_uses_first_char_and_every_preceded_by_underscore(
+    table_name, alias
+):
+    assert pgcompleter.generate_alias(table_name) == alias
+
+
+@pytest.mark.parametrize(
+    "table_name, alias_map, alias",
+    [
+        ("some_table", {"some_table": "my_alias"}, "my_alias"),
+    ],
+)
+def test_generate_alias_can_use_alias_map(table_name, alias_map, alias):
+    assert pgcompleter.generate_alias(table_name, alias_map) == alias
+
+
+@pytest.mark.parametrize(
+    "table_name, alias_map, alias",
+    [
+        ("SomeTable", {"SomeTable": "my_alias"}, "my_alias"),
+    ],
+)
+def test_generate_alias_prefers_alias_over_upper_case_name(
+    table_name, alias_map, alias
+):
+    assert pgcompleter.generate_alias(table_name, alias_map) == alias
+
+
+@pytest.mark.parametrize(
+    "table_name, alias",
+    [
+        ("Some_tablE", "SE"),
+        ("SomeTab_le", "ST"),
+    ],
+)
+def test_generate_alias_prefers_upper_case_name_over_underscore_name(table_name, alias):
+    assert pgcompleter.generate_alias(table_name) == alias
--- a/tests/test_pgexecute.py
+++ b/tests/test_pgexecute.py
@ -304,9 +304,7 @@ def test_execute_from_commented_file_that_executes_another_file(

@dbtest
 def test_execute_commented_first_line_and_special(executor, pgspecial, tmpdir):
-    # https://github.com/dbcli/pgcli/issues/1362
-
-    # just some base caes that should work also
+    # just some base cases that should work also
    statement = "--comment\nselect now();"
    result = run(executor, statement, pgspecial=pgspecial)
    assert result != None
@ -317,23 +315,43 @@ def test_execute_commented_first_line_and_special(executor, pgspecial, tmpdir):
    assert result != None
    assert result[1].find("now") >= 0

-    statement = "/*comment\ncomment line2*/\nselect now();"
-    result = run(executor, statement, pgspecial=pgspecial)
-    assert result != None
-    assert result[1].find("now") >= 0
-
+    # https://github.com/dbcli/pgcli/issues/1362
    statement = "--comment\n\\h"
    result = run(executor, statement, pgspecial=pgspecial)
    assert result != None
    assert result[1].find("ALTER") >= 0
    assert result[1].find("ABORT") >= 0

+    statement = "--comment1\n--comment2\n\\h"
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[1].find("ALTER") >= 0
+    assert result[1].find("ABORT") >= 0
+
    statement = "/*comment*/\n\h;"
    result = run(executor, statement, pgspecial=pgspecial)
    assert result != None
    assert result[1].find("ALTER") >= 0
    assert result[1].find("ABORT") >= 0

+    statement = """/*comment1
+    comment2*/
+    \h"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[1].find("ALTER") >= 0
+    assert result[1].find("ABORT") >= 0
+
+    statement = """/*comment1
+    comment2*/
+    /*comment 3
+    comment4*/
+    \\h"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[1].find("ALTER") >= 0
+    assert result[1].find("ABORT") >= 0
+
    statement = "    /*comment*/\n\h;"
    result = run(executor, statement, pgspecial=pgspecial)
    assert result != None
@ -352,6 +370,126 @@ def test_execute_commented_first_line_and_special(executor, pgspecial, tmpdir):
    assert result[1].find("ALTER") >= 0
    assert result[1].find("ABORT") >= 0

+    statement = """\\h /*comment4 */"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    print(result)
+    assert result != None
+    assert result[0].find("No help") >= 0
+
+    # TODO: we probably don't want to do this but sqlparse is not parsing things well
+    # we relly want it to find help but right now, sqlparse isn't dropping the /*comment*/
+    # style comments after command
+
+    statement = """/*comment1*/
+    \h
+    /*comment4 */"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[0].find("No help") >= 0
+
+    # TODO: same for this one
+    statement = """/*comment1
+    comment3
+    comment2*/
+    \\h
+    /*comment4
+    comment5
+    comment6*/"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[0].find("No help") >= 0
+
+
+@dbtest
+def test_execute_commented_first_line_and_normal(executor, pgspecial, tmpdir):
+    # https://github.com/dbcli/pgcli/issues/1403
+
+    # just some base cases that should work also
+    statement = "--comment\nselect now();"
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[1].find("now") >= 0
+
+    statement = "/*comment*/\nselect now();"
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[1].find("now") >= 0
+
+    # this simulates the original error (1403) without having to add/drop tables
+    # since it was just an error on reading input files and not the actual
+    # command itself
+
+    # test that the statement works
+    statement = """VALUES (1, 'one'), (2, 'two'), (3, 'three');"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[5].find("three") >= 0
+
+    # test the statement with a \n in the middle
+    statement = """VALUES (1, 'one'),\n (2, 'two'), (3, 'three');"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[5].find("three") >= 0
+
+    # test the statement with a newline in the middle
+    statement = """VALUES (1, 'one'),
+     (2, 'two'), (3, 'three');"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[5].find("three") >= 0
+
+    # now add a single comment line
+    statement = """--comment\nVALUES (1, 'one'), (2, 'two'), (3, 'three');"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[5].find("three") >= 0
+
+    # doing without special char \n
+    statement = """--comment
+    VALUES (1,'one'),
+    (2, 'two'), (3, 'three');"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[5].find("three") >= 0
+
+    # two comment lines
+    statement = """--comment\n--comment2\nVALUES (1,'one'), (2, 'two'), (3, 'three');"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[5].find("three") >= 0
+
+    # doing without special char \n
+    statement = """--comment
+    --comment2
+    VALUES (1,'one'), (2, 'two'), (3, 'three');
+    """
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[5].find("three") >= 0
+
+    # multiline comment + newline in middle of the statement
+    statement = """/*comment
+comment2
+comment3*/
+VALUES (1,'one'),
+(2, 'two'), (3, 'three');"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[5].find("three") >= 0
+
+    # multiline comment + newline in middle of the statement
+    # + comments after the statement
+    statement = """/*comment
+comment2
+comment3*/
+VALUES (1,'one'),
+(2, 'two'), (3, 'three');
+--comment4
+--comment5"""
+    result = run(executor, statement, pgspecial=pgspecial)
+    assert result != None
+    assert result[5].find("three") >= 0
+

@dbtest
 def test_multiple_queries_same_line(executor):
@ -558,6 +696,7 @@ def test_view_definition(executor):
    run(executor, "create view vw1 AS SELECT * FROM tbl1")
    run(executor, "create materialized view mvw1 AS SELECT * FROM tbl1")
    result = executor.view_definition("vw1")
+    assert 'VIEW "public"."vw1" AS' in result
    assert "FROM tbl1" in result
    # import pytest; pytest.set_trace()
    result = executor.view_definition("mvw1")
--- a/tests/test_prompt_utils.py
+++ b/tests/test_prompt_utils.py
@ -7,4 +7,11 @@ def test_confirm_destructive_query_notty():
    stdin = click.get_text_stream("stdin")
    if not stdin.isatty():
        sql = "drop database foo;"
-        assert confirm_destructive_query(sql, "all") is None
+        assert confirm_destructive_query(sql, [], None) is None
+
+
+def test_confirm_destructive_query_with_alias():
+    stdin = click.get_text_stream("stdin")
+    if not stdin.isatty():
+        sql = "drop database foo;"
+        assert confirm_destructive_query(sql, ["drop"], "test") is None
--- a/tox.ini
+++ b/tox.ini
@ -1,10 +1,11 @@
 [tox]
-envlist = py37, py38, py39, py310
+envlist = py38, py39, py310, py311, py312
 [testenv]
 deps = pytest>=2.7.0,<=3.0.7
    mock>=1.0.1
    behave>=1.2.4
    pexpect==3.3
+    sshtunnel>=0.4.0
 commands = py.test
    behave tests/features
 passenv = PGHOST