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Diffstat (limited to '')
| -rw-r--r-- | pgcli/pgexecute.py | 846 |
1 files changed, 846 insertions, 0 deletions
diff --git a/pgcli/pgexecute.py b/pgcli/pgexecute.py new file mode 100644 index 0000000..8f2968d --- /dev/null +++ b/pgcli/pgexecute.py @@ -0,0 +1,846 @@ +import logging +import traceback +from collections import namedtuple + +import pgspecial as special +import psycopg +import psycopg.sql +from psycopg.conninfo import make_conninfo +import sqlparse + +from .packages.parseutils.meta import FunctionMetadata, ForeignKey + +_logger = logging.getLogger(__name__) + +ViewDef = namedtuple( + "ViewDef", "nspname relname relkind viewdef reloptions checkoption" +) + + +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""" + for forced_text_type in [ + "date", + "time", + "timestamp", + "timestamptz", + "bytea", + "json", + "jsonb", + ]: + connection.adapters.register_loader( + forced_text_type, psycopg.types.string.TextLoader + ) + + +# pg3: I don't know what is this +class ProtocolSafeCursor(psycopg.Cursor): + """This class wraps and suppresses Protocol Errors with pgbouncer database. + See https://github.com/dbcli/pgcli/pull/1097. + Pgbouncer database is a virtual database with its own set of commands.""" + + def __init__(self, *args, **kwargs): + self.protocol_error = False + self.protocol_message = "" + super().__init__(*args, **kwargs) + + def __iter__(self): + if self.protocol_error: + raise StopIteration + return super().__iter__() + + def fetchall(self): + if self.protocol_error: + return [(self.protocol_message,)] + return super().fetchall() + + def fetchone(self): + if self.protocol_error: + return (self.protocol_message,) + return super().fetchone() + + # def mogrify(self, query, params): + # args = [Literal(v).as_string(self.connection) for v in params] + # return query % tuple(args) + # + def execute(self, *args, **kwargs): + try: + super().execute(*args, **kwargs) + self.protocol_error = False + self.protocol_message = "" + except psycopg.errors.ProtocolViolation as ex: + self.protocol_error = True + self.protocol_message = str(ex) + _logger.debug("%s: %s" % (ex.__class__.__name__, ex)) + + +class PGExecute: + + # The boolean argument to the current_schemas function indicates whether + # implicit schemas, e.g. pg_catalog + search_path_query = """ + SELECT * FROM unnest(current_schemas(true))""" + + schemata_query = """ + SELECT nspname + FROM pg_catalog.pg_namespace + ORDER BY 1 """ + + tables_query = """ + SELECT n.nspname schema_name, + c.relname table_name + FROM pg_catalog.pg_class c + LEFT JOIN pg_catalog.pg_namespace n + ON n.oid = c.relnamespace + WHERE c.relkind = ANY(%s) + ORDER BY 1,2;""" + + databases_query = """ + SELECT d.datname + FROM pg_catalog.pg_database d + ORDER BY 1""" + + full_databases_query = """ + SELECT d.datname as "Name", + pg_catalog.pg_get_userbyid(d.datdba) as "Owner", + pg_catalog.pg_encoding_to_char(d.encoding) as "Encoding", + d.datcollate as "Collate", + d.datctype as "Ctype", + pg_catalog.array_to_string(d.datacl, E'\n') AS "Access privileges" + FROM pg_catalog.pg_database d + ORDER BY 1""" + + socket_directory_query = """ + SELECT setting + FROM pg_settings + WHERE name = 'unix_socket_directories' + """ + + view_definition_query = """ + WITH v AS (SELECT %s::pg_catalog.regclass::pg_catalog.oid AS v_oid) + SELECT nspname, relname, relkind, + pg_catalog.pg_get_viewdef(c.oid, true), + array_remove(array_remove(c.reloptions,'check_option=local'), + 'check_option=cascaded') AS reloptions, + CASE + WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text + WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text + ELSE NULL + END AS checkoption + FROM pg_catalog.pg_class c + LEFT JOIN pg_catalog.pg_namespace n ON (c.relnamespace = n.oid) + JOIN v ON (c.oid = v.v_oid)""" + + function_definition_query = """ + WITH f AS + (SELECT %s::pg_catalog.regproc::pg_catalog.oid AS f_oid) + SELECT pg_catalog.pg_get_functiondef(f.f_oid) + FROM f""" + + def __init__( + self, + database=None, + user=None, + password=None, + host=None, + port=None, + dsn=None, + **kwargs, + ): + self._conn_params = {} + self._is_virtual_database = None + self.conn = None + self.dbname = None + self.user = None + self.password = None + self.host = None + self.port = None + self.server_version = None + self.extra_args = None + self.connect(database, user, password, host, port, dsn, **kwargs) + self.reset_expanded = None + + def is_virtual_database(self): + if self._is_virtual_database is None: + self._is_virtual_database = self.is_protocol_error() + return self._is_virtual_database + + def copy(self): + """Returns a clone of the current executor.""" + return self.__class__(**self._conn_params) + + def connect( + self, + database=None, + user=None, + password=None, + host=None, + port=None, + dsn=None, + **kwargs, + ): + + conn_params = self._conn_params.copy() + + new_params = { + "dbname": database, + "user": user, + "password": password, + "host": host, + "port": port, + "dsn": dsn, + } + new_params.update(kwargs) + + if new_params["dsn"]: + new_params = {"dsn": new_params["dsn"], "password": new_params["password"]} + + if new_params["password"]: + new_params["dsn"] = make_conninfo( + new_params["dsn"], password=new_params.pop("password") + ) + + conn_params.update({k: v for k, v in new_params.items() if v}) + + conn_info = make_conninfo(**conn_params) + conn = psycopg.connect(conn_info) + conn.cursor_factory = ProtocolSafeCursor + + self._conn_params = conn_params + if self.conn: + self.conn.close() + self.conn = conn + self.conn.autocommit = True + + # When we connect using a DSN, we don't really know what db, + # user, etc. we connected to. Let's read it. + # Note: moved this after setting autocommit because of #664. + dsn_parameters = conn.info.get_parameters() + + if dsn_parameters: + self.dbname = dsn_parameters.get("dbname") + self.user = dsn_parameters.get("user") + self.host = dsn_parameters.get("host") + self.port = dsn_parameters.get("port") + else: + self.dbname = conn_params.get("database") + self.user = conn_params.get("user") + self.host = conn_params.get("host") + self.port = conn_params.get("port") + + self.password = password + self.extra_args = kwargs + + if not self.host: + self.host = ( + "pgbouncer" + if self.is_virtual_database() + else self.get_socket_directory() + ) + + self.pid = conn.info.backend_pid + self.superuser = conn.info.parameter_status("is_superuser") in ("on", "1") + self.server_version = conn.info.parameter_status("server_version") or "" + + # _set_wait_callback(self.is_virtual_database()) + + if not self.is_virtual_database(): + register_typecasters(conn) + + @property + def short_host(self): + if "," in self.host: + host, _, _ = self.host.partition(",") + else: + host = self.host + short_host, _, _ = host.partition(".") + return short_host + + def _select_one(self, cur, sql): + """ + Helper method to run a select and retrieve a single field value + :param cur: cursor + :param sql: string + :return: string + """ + cur.execute(sql) + return cur.fetchone() + + def failed_transaction(self): + return self.conn.info.transaction_status == psycopg.pq.TransactionStatus.INERROR + + def valid_transaction(self): + status = self.conn.info.transaction_status + return ( + status == psycopg.pq.TransactionStatus.ACTIVE + or status == psycopg.pq.TransactionStatus.INTRANS + ) + + def run( + self, + statement, + pgspecial=None, + exception_formatter=None, + on_error_resume=False, + explain_mode=False, + ): + """Execute the sql in the database and return the results. + + :param statement: A string containing one or more sql statements + :param pgspecial: PGSpecial object + :param exception_formatter: A callable that accepts an Exception and + returns a formatted (title, rows, headers, status) tuple that can + act as a query result. If an exception_formatter is not supplied, + psycopg2 exceptions are always raised. + :param on_error_resume: Bool. If true, queries following an exception + (assuming exception_formatter has been supplied) continue to + execute. + + :return: Generator yielding tuples containing + (title, rows, headers, status, query, success, is_special) + """ + + # Remove spaces and EOL + statement = statement.strip() + if not statement: # Empty string + yield None, None, None, None, statement, False, False + + # sql parse doesn't split on a comment first + special + # so we're going to do it + + sqltemp = [] + sqlarr = [] + + 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) + + # run each sql query + for sql in sqlarr: + # Remove spaces, eol and semi-colons. + sql = sql.rstrip(";") + sql = sqlparse.format(sql, strip_comments=False).strip() + if not sql: + continue + try: + if explain_mode: + sql = self.explain_prefix() + sql + elif pgspecial: + # \G is treated specially since we have to set the expanded output. + if sql.endswith("\\G"): + if not pgspecial.expanded_output: + pgspecial.expanded_output = True + self.reset_expanded = True + sql = sql[:-2].strip() + + # First try to run each query as special + _logger.debug("Trying a pgspecial command. sql: %r", sql) + try: + cur = self.conn.cursor() + except psycopg.InterfaceError: + # edge case when connection is already closed, but we + # don't need cursor for special_cmd.arg_type == NO_QUERY. + # See https://github.com/dbcli/pgcli/issues/1014. + cur = None + try: + response = pgspecial.execute(cur, sql) + if cur and cur.protocol_error: + yield None, None, None, cur.protocol_message, statement, False, False + # this would close connection. We should reconnect. + self.connect() + continue + for result in response: + # e.g. execute_from_file already appends these + if len(result) < 7: + yield result + (sql, True, True) + else: + yield result + continue + except special.CommandNotFound: + pass + + # Not a special command, so execute as normal sql + yield self.execute_normal_sql(sql) + (sql, True, False) + except psycopg.DatabaseError as e: + _logger.error("sql: %r, error: %r", sql, e) + _logger.error("traceback: %r", traceback.format_exc()) + + if self._must_raise(e) or not exception_formatter: + raise + + yield None, None, None, exception_formatter(e), sql, False, False + + if not on_error_resume: + break + finally: + if self.reset_expanded: + pgspecial.expanded_output = False + self.reset_expanded = None + + def _must_raise(self, e): + """Return true if e is an error that should not be caught in ``run``. + + An uncaught error will prompt the user to reconnect; as long as we + detect that the connection is still open, we catch the error, as + reconnecting won't solve that problem. + + :param e: DatabaseError. An exception raised while executing a query. + + :return: Bool. True if ``run`` must raise this exception. + + """ + return self.conn.closed != 0 + + def execute_normal_sql(self, split_sql): + """Returns tuple (title, rows, headers, status)""" + _logger.debug("Regular sql statement. sql: %r", split_sql) + + title = "" + + def handle_notices(n): + nonlocal title + title = f"{n.message_primary}\n{n.message_detail}\n{title}" + + self.conn.add_notice_handler(handle_notices) + + if self.is_virtual_database() and "show help" in split_sql.lower(): + # see https://github.com/psycopg/psycopg/issues/303 + # special case "show help" in pgbouncer + res = self.conn.pgconn.exec_(split_sql.encode()) + return title, None, None, res.command_status.decode() + + cur = self.conn.cursor() + cur.execute(split_sql) + + # cur.description will be None for operations that do not return + # rows. + if cur.description: + headers = [x[0] for x in cur.description] + return title, cur, headers, cur.statusmessage + elif cur.protocol_error: + _logger.debug("Protocol error, unsupported command.") + return title, None, None, cur.protocol_message + else: + _logger.debug("No rows in result.") + return title, None, None, cur.statusmessage + + def search_path(self): + """Returns the current search path as a list of schema names""" + + try: + with self.conn.cursor() as cur: + _logger.debug("Search path query. sql: %r", self.search_path_query) + cur.execute(self.search_path_query) + return [x[0] for x in cur.fetchall()] + except psycopg.ProgrammingError: + fallback = "SELECT * FROM current_schemas(true)" + with self.conn.cursor() as cur: + _logger.debug("Search path query. sql: %r", fallback) + cur.execute(fallback) + return cur.fetchone()[0] + + def view_definition(self, spec): + """Returns the SQL defining views described by `spec`""" + + # 2: relkind, v or m (materialized) + # 4: reloptions, null + # 5: checkoption: local or cascaded + with self.conn.cursor() as cur: + sql = self.view_definition_query + _logger.debug("View Definition Query. sql: %r\nspec: %r", sql, spec) + try: + cur.execute(sql, (spec,)) + except psycopg.ProgrammingError: + raise RuntimeError(f"View {spec} does not exist.") + result = ViewDef(*cur.fetchone()) + if result.relkind == "m": + template = "CREATE OR REPLACE MATERIALIZED VIEW {name} AS \n{stmt}" + else: + template = "CREATE OR REPLACE VIEW {name} AS \n{stmt}" + return ( + psycopg.sql.SQL(template) + .format( + name=psycopg.sql.Identifier(f"{result.nspname}.{result.relname}"), + stmt=psycopg.sql.SQL(result.viewdef), + ) + .as_string(self.conn) + ) + + def function_definition(self, spec): + """Returns the SQL defining functions described by `spec`""" + + with self.conn.cursor() as cur: + sql = self.function_definition_query + _logger.debug("Function Definition Query. sql: %r\nspec: %r", sql, spec) + try: + cur.execute(sql, (spec,)) + result = cur.fetchone() + return result[0] + except psycopg.ProgrammingError: + raise RuntimeError(f"Function {spec} does not exist.") + + def schemata(self): + """Returns a list of schema names in the database""" + + with self.conn.cursor() as cur: + _logger.debug("Schemata Query. sql: %r", self.schemata_query) + cur.execute(self.schemata_query) + return [x[0] for x in cur.fetchall()] + + def _relations(self, kinds=("r", "p", "f", "v", "m")): + """Get table or view name metadata + + :param kinds: list of postgres relkind filters: + 'r' - table + 'p' - partitioned table + 'f' - foreign table + 'v' - view + 'm' - materialized view + :return: (schema_name, rel_name) tuples + """ + + with self.conn.cursor() as cur: + # sql = cur.mogrify(self.tables_query, kinds) + # _logger.debug("Tables Query. sql: %r", sql) + cur.execute(self.tables_query, [kinds]) + yield from cur + + def tables(self): + """Yields (schema_name, table_name) tuples""" + yield from self._relations(kinds=["r", "p", "f"]) + + def views(self): + """Yields (schema_name, view_name) tuples. + + Includes both views and and materialized views + """ + yield from self._relations(kinds=["v", "m"]) + + def _columns(self, kinds=("r", "p", "f", "v", "m")): + """Get column metadata for tables and views + + :param kinds: kinds: list of postgres relkind filters: + 'r' - table + 'p' - partitioned table + 'f' - foreign table + 'v' - view + 'm' - materialized view + :return: list of (schema_name, relation_name, column_name, column_type) tuples + """ + + if self.conn.info.server_version >= 80400: + columns_query = """ + SELECT nsp.nspname schema_name, + cls.relname table_name, + att.attname column_name, + att.atttypid::regtype::text type_name, + att.atthasdef AS has_default, + pg_catalog.pg_get_expr(def.adbin, def.adrelid, true) as default + FROM pg_catalog.pg_attribute att + INNER JOIN pg_catalog.pg_class cls + ON att.attrelid = cls.oid + INNER JOIN pg_catalog.pg_namespace nsp + ON cls.relnamespace = nsp.oid + LEFT OUTER JOIN pg_attrdef def + ON def.adrelid = att.attrelid + AND def.adnum = att.attnum + WHERE cls.relkind = ANY(%s) + AND NOT att.attisdropped + AND att.attnum > 0 + ORDER BY 1, 2, att.attnum""" + else: + columns_query = """ + SELECT nsp.nspname schema_name, + cls.relname table_name, + att.attname column_name, + typ.typname type_name, + NULL AS has_default, + NULL AS default + FROM pg_catalog.pg_attribute att + INNER JOIN pg_catalog.pg_class cls + ON att.attrelid = cls.oid + INNER JOIN pg_catalog.pg_namespace nsp + ON cls.relnamespace = nsp.oid + INNER JOIN pg_catalog.pg_type typ + ON typ.oid = att.atttypid + WHERE cls.relkind = ANY(%s) + AND NOT att.attisdropped + AND att.attnum > 0 + ORDER BY 1, 2, att.attnum""" + + with self.conn.cursor() as cur: + # sql = cur.mogrify(columns_query, kinds) + # _logger.debug("Columns Query. sql: %r", sql) + cur.execute(columns_query, [kinds]) + yield from cur + + def table_columns(self): + yield from self._columns(kinds=["r", "p", "f"]) + + def view_columns(self): + yield from self._columns(kinds=["v", "m"]) + + def databases(self): + with self.conn.cursor() as cur: + _logger.debug("Databases Query. sql: %r", self.databases_query) + cur.execute(self.databases_query) + return [x[0] for x in cur.fetchall()] + + def full_databases(self): + with self.conn.cursor() as cur: + _logger.debug("Databases Query. sql: %r", self.full_databases_query) + cur.execute(self.full_databases_query) + headers = [x[0] for x in cur.description] + return cur.fetchall(), headers, cur.statusmessage + + def is_protocol_error(self): + query = "SELECT 1" + with self.conn.cursor() as cur: + _logger.debug("Simple Query. sql: %r", query) + cur.execute(query) + return bool(cur.protocol_error) + + def get_socket_directory(self): + with self.conn.cursor() as cur: + _logger.debug( + "Socket directory Query. sql: %r", self.socket_directory_query + ) + cur.execute(self.socket_directory_query) + result = cur.fetchone() + return result[0] if result else "" + + def foreignkeys(self): + """Yields ForeignKey named tuples""" + + if self.conn.info.server_version < 90000: + return + + with self.conn.cursor() as cur: + query = """ + SELECT s_p.nspname AS parentschema, + t_p.relname AS parenttable, + unnest(( + select + array_agg(attname ORDER BY i) + from + (select unnest(confkey) as attnum, generate_subscripts(confkey, 1) as i) x + JOIN pg_catalog.pg_attribute c USING(attnum) + WHERE c.attrelid = fk.confrelid + )) AS parentcolumn, + s_c.nspname AS childschema, + t_c.relname AS childtable, + unnest(( + select + array_agg(attname ORDER BY i) + from + (select unnest(conkey) as attnum, generate_subscripts(conkey, 1) as i) x + JOIN pg_catalog.pg_attribute c USING(attnum) + WHERE c.attrelid = fk.conrelid + )) AS childcolumn + FROM pg_catalog.pg_constraint fk + JOIN pg_catalog.pg_class t_p ON t_p.oid = fk.confrelid + JOIN pg_catalog.pg_namespace s_p ON s_p.oid = t_p.relnamespace + JOIN pg_catalog.pg_class t_c ON t_c.oid = fk.conrelid + JOIN pg_catalog.pg_namespace s_c ON s_c.oid = t_c.relnamespace + WHERE fk.contype = 'f'; + """ + _logger.debug("Functions Query. sql: %r", query) + cur.execute(query) + for row in cur: + yield ForeignKey(*row) + + def functions(self): + """Yields FunctionMetadata named tuples""" + + if self.conn.info.server_version >= 110000: + query = """ + SELECT n.nspname schema_name, + p.proname func_name, + p.proargnames, + COALESCE(proallargtypes::regtype[], proargtypes::regtype[])::text[], + p.proargmodes, + prorettype::regtype::text return_type, + p.prokind = 'a' is_aggregate, + p.prokind = 'w' is_window, + p.proretset is_set_returning, + d.deptype = 'e' is_extension, + pg_get_expr(proargdefaults, 0) AS arg_defaults + FROM pg_catalog.pg_proc p + INNER JOIN pg_catalog.pg_namespace n + ON n.oid = p.pronamespace + LEFT JOIN pg_depend d ON d.objid = p.oid and d.deptype = 'e' + WHERE p.prorettype::regtype != 'trigger'::regtype + ORDER BY 1, 2 + """ + elif self.conn.info.server_version > 90000: + query = """ + SELECT n.nspname schema_name, + p.proname func_name, + p.proargnames, + COALESCE(proallargtypes::regtype[], proargtypes::regtype[])::text[], + p.proargmodes, + prorettype::regtype::text return_type, + p.proisagg is_aggregate, + p.proiswindow is_window, + p.proretset is_set_returning, + d.deptype = 'e' is_extension, + pg_get_expr(proargdefaults, 0) AS arg_defaults + FROM pg_catalog.pg_proc p + INNER JOIN pg_catalog.pg_namespace n + ON n.oid = p.pronamespace + LEFT JOIN pg_depend d ON d.objid = p.oid and d.deptype = 'e' + WHERE p.prorettype::regtype != 'trigger'::regtype + ORDER BY 1, 2 + """ + elif self.conn.info.server_version >= 80400: + query = """ + SELECT n.nspname schema_name, + p.proname func_name, + p.proargnames, + COALESCE(proallargtypes::regtype[], proargtypes::regtype[])::text[], + p.proargmodes, + prorettype::regtype::text, + p.proisagg is_aggregate, + false is_window, + p.proretset is_set_returning, + d.deptype = 'e' is_extension, + NULL AS arg_defaults + FROM pg_catalog.pg_proc p + INNER JOIN pg_catalog.pg_namespace n + ON n.oid = p.pronamespace + LEFT JOIN pg_depend d ON d.objid = p.oid and d.deptype = 'e' + WHERE p.prorettype::regtype != 'trigger'::regtype + ORDER BY 1, 2 + """ + else: + query = """ + SELECT n.nspname schema_name, + p.proname func_name, + p.proargnames, + NULL arg_types, + NULL arg_modes, + '' ret_type, + p.proisagg is_aggregate, + false is_window, + p.proretset is_set_returning, + d.deptype = 'e' is_extension, + NULL AS arg_defaults + FROM pg_catalog.pg_proc p + INNER JOIN pg_catalog.pg_namespace n + ON n.oid = p.pronamespace + LEFT JOIN pg_depend d ON d.objid = p.oid and d.deptype = 'e' + WHERE p.prorettype::regtype != 'trigger'::regtype + ORDER BY 1, 2 + """ + + with self.conn.cursor() as cur: + _logger.debug("Functions Query. sql: %r", query) + cur.execute(query) + for row in cur: + yield FunctionMetadata(*row) + + def datatypes(self): + """Yields tuples of (schema_name, type_name)""" + + with self.conn.cursor() as cur: + if self.conn.info.server_version > 90000: + query = """ + SELECT n.nspname schema_name, + t.typname type_name + FROM pg_catalog.pg_type t + INNER JOIN pg_catalog.pg_namespace n + ON n.oid = t.typnamespace + WHERE ( t.typrelid = 0 -- non-composite types + OR ( -- composite type, but not a table + SELECT c.relkind = 'c' + FROM pg_catalog.pg_class c + WHERE c.oid = t.typrelid + ) + ) + AND NOT EXISTS( -- ignore array types + SELECT 1 + FROM pg_catalog.pg_type el + WHERE el.oid = t.typelem AND el.typarray = t.oid + ) + AND n.nspname <> 'pg_catalog' + AND n.nspname <> 'information_schema' + ORDER BY 1, 2; + """ + else: + query = """ + SELECT n.nspname schema_name, + pg_catalog.format_type(t.oid, NULL) type_name + FROM pg_catalog.pg_type t + LEFT JOIN pg_catalog.pg_namespace n ON n.oid = t.typnamespace + WHERE (t.typrelid = 0 OR (SELECT c.relkind = 'c' FROM pg_catalog.pg_class c WHERE c.oid = t.typrelid)) + AND t.typname !~ '^_' + AND n.nspname <> 'pg_catalog' + AND n.nspname <> 'information_schema' + AND pg_catalog.pg_type_is_visible(t.oid) + ORDER BY 1, 2; + """ + _logger.debug("Datatypes Query. sql: %r", query) + cur.execute(query) + yield from cur + + def casing(self): + """Yields the most common casing for names used in db functions""" + with self.conn.cursor() as cur: + query = r""" + WITH Words AS ( + SELECT regexp_split_to_table(prosrc, '\W+') AS Word, COUNT(1) + FROM pg_catalog.pg_proc P + JOIN pg_catalog.pg_namespace N ON N.oid = P.pronamespace + JOIN pg_catalog.pg_language L ON L.oid = P.prolang + WHERE L.lanname IN ('sql', 'plpgsql') + AND N.nspname NOT IN ('pg_catalog', 'information_schema') + GROUP BY Word + ), + OrderWords AS ( + SELECT Word, + ROW_NUMBER() OVER(PARTITION BY LOWER(Word) ORDER BY Count DESC) + FROM Words + WHERE Word ~* '.*[a-z].*' + ), + Names AS ( + --Column names + SELECT attname AS Name + FROM pg_catalog.pg_attribute + UNION -- Table/view names + SELECT relname + FROM pg_catalog.pg_class + UNION -- Function names + SELECT proname + FROM pg_catalog.pg_proc + UNION -- Type names + SELECT typname + FROM pg_catalog.pg_type + UNION -- Schema names + SELECT nspname + FROM pg_catalog.pg_namespace + UNION -- Parameter names + SELECT unnest(proargnames) + FROM pg_proc + ) + SELECT Word + FROM OrderWords + WHERE LOWER(Word) IN (SELECT Name FROM Names) + AND Row_Number = 1; + """ + _logger.debug("Casing Query. sql: %r", query) + cur.execute(query) + for row in cur: + yield row[0] + + def explain_prefix(self): + return "EXPLAIN (ANALYZE, COSTS, VERBOSE, BUFFERS, FORMAT JSON) " |