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from __future__ import unicode_literals, print_function
import csv
import logging
import os
import sys
import platform
import shlex
from sqlite3 import ProgrammingError
from litecli import __version__
from litecli.packages.special import iocommands
from litecli.packages.special.utils import format_uptime
from .main import special_command, RAW_QUERY, PARSED_QUERY, ArgumentMissing
log = logging.getLogger(__name__)
@special_command(
".tables",
"\\dt",
"List tables.",
arg_type=PARSED_QUERY,
case_sensitive=True,
aliases=("\\dt",),
)
def list_tables(cur, arg=None, arg_type=PARSED_QUERY, verbose=False):
if arg:
args = ("{0}%".format(arg),)
query = """
SELECT name FROM sqlite_master
WHERE type IN ('table','view') AND name LIKE ? AND name NOT LIKE 'sqlite_%'
ORDER BY 1
"""
else:
args = tuple()
query = """
SELECT name FROM sqlite_master
WHERE type IN ('table','view') AND name NOT LIKE 'sqlite_%'
ORDER BY 1
"""
log.debug(query)
cur.execute(query, args)
tables = cur.fetchall()
status = ""
if cur.description:
headers = [x[0] for x in cur.description]
else:
return [(None, None, None, "")]
# if verbose and arg:
# query = "SELECT sql FROM sqlite_master WHERE name LIKE ?"
# log.debug(query)
# cur.execute(query)
# status = cur.fetchone()[1]
return [(None, tables, headers, status)]
@special_command(
".schema",
".schema[+] [table]",
"The complete schema for the database or a single table",
arg_type=PARSED_QUERY,
case_sensitive=True,
)
def show_schema(cur, arg=None, **_):
if arg:
args = (arg,)
query = """
SELECT sql FROM sqlite_master
WHERE name==?
ORDER BY tbl_name, type DESC, name
"""
else:
args = tuple()
query = """
SELECT sql FROM sqlite_master
ORDER BY tbl_name, type DESC, name
"""
log.debug(query)
cur.execute(query, args)
tables = cur.fetchall()
status = ""
if cur.description:
headers = [x[0] for x in cur.description]
else:
return [(None, None, None, "")]
return [(None, tables, headers, status)]
@special_command(
".databases",
".databases",
"List databases.",
arg_type=RAW_QUERY,
case_sensitive=True,
aliases=("\\l",),
)
def list_databases(cur, **_):
query = "PRAGMA database_list"
log.debug(query)
cur.execute(query)
if cur.description:
headers = [x[0] for x in cur.description]
return [(None, cur, headers, "")]
else:
return [(None, None, None, "")]
@special_command(
".indexes",
".indexes [tablename]",
"List indexes.",
arg_type=PARSED_QUERY,
case_sensitive=True,
aliases=("\\di",),
)
def list_indexes(cur, arg=None, arg_type=PARSED_QUERY, verbose=False):
if arg:
args = ("{0}%".format(arg),)
query = """
SELECT name FROM sqlite_master
WHERE type = 'index' AND tbl_name LIKE ? AND name NOT LIKE 'sqlite_%'
ORDER BY 1
"""
else:
args = tuple()
query = """
SELECT name FROM sqlite_master
WHERE type = 'index' AND name NOT LIKE 'sqlite_%'
ORDER BY 1
"""
log.debug(query)
cur.execute(query, args)
indexes = cur.fetchall()
status = ""
if cur.description:
headers = [x[0] for x in cur.description]
else:
return [(None, None, None, "")]
return [(None, indexes, headers, status)]
@special_command(
".status",
"\\s",
"Show current settings.",
arg_type=RAW_QUERY,
aliases=("\\s",),
case_sensitive=True,
)
def status(cur, **_):
# Create output buffers.
footer = []
footer.append("--------------")
# Output the litecli client information.
implementation = platform.python_implementation()
version = platform.python_version()
client_info = []
client_info.append("litecli {0},".format(__version__))
client_info.append("running on {0} {1}".format(implementation, version))
footer.append(" ".join(client_info))
# Build the output that will be displayed as a table.
query = "SELECT file from pragma_database_list() where name = 'main';"
log.debug(query)
cur.execute(query)
db = cur.fetchone()[0]
if db is None:
db = ""
footer.append("Current database: " + db)
if iocommands.is_pager_enabled():
if "PAGER" in os.environ:
pager = os.environ["PAGER"]
else:
pager = "System default"
else:
pager = "stdout"
footer.append("Current pager:" + pager)
footer.append("--------------")
return [(None, None, "", "\n".join(footer))]
@special_command(
".load",
".load path",
"Load an extension library.",
arg_type=PARSED_QUERY,
case_sensitive=True,
)
def load_extension(cur, arg, **_):
args = shlex.split(arg)
if len(args) != 1:
raise TypeError(".load accepts exactly one path")
path = args[0]
conn = cur.connection
conn.enable_load_extension(True)
conn.load_extension(path)
return [(None, None, None, "")]
@special_command(
"describe",
"\\d [table]",
"Description of a table",
arg_type=PARSED_QUERY,
case_sensitive=True,
aliases=("\\d", "describe", "desc"),
)
def describe(cur, arg, **_):
if arg:
args = (arg,)
query = """
PRAGMA table_info({})
""".format(
arg
)
else:
raise ArgumentMissing("Table name required.")
log.debug(query)
cur.execute(query)
tables = cur.fetchall()
status = ""
if cur.description:
headers = [x[0] for x in cur.description]
else:
return [(None, None, None, "")]
return [(None, tables, headers, status)]
@special_command(
".import",
".import filename table",
"Import data from filename into an existing table",
arg_type=PARSED_QUERY,
case_sensitive=True,
)
def import_file(cur, arg=None, **_):
def split(s):
# this is a modification of shlex.split function, just to make it support '`',
# because table name might contain '`' character.
lex = shlex.shlex(s, posix=True)
lex.whitespace_split = True
lex.commenters = ""
lex.quotes += "`"
return list(lex)
args = split(arg)
log.debug("[arg = %r], [args = %r]", arg, args)
if len(args) != 2:
raise TypeError("Usage: .import filename table")
filename, table = args
cur.execute('PRAGMA table_info("%s")' % table)
ncols = len(cur.fetchall())
insert_tmpl = 'INSERT INTO "%s" VALUES (?%s)' % (table, ",?" * (ncols - 1))
with open(filename, "r") as csvfile:
dialect = csv.Sniffer().sniff(csvfile.read(1024))
csvfile.seek(0)
reader = csv.reader(csvfile, dialect)
cur.execute("BEGIN")
ninserted, nignored = 0, 0
for i, row in enumerate(reader):
if len(row) != ncols:
print(
"%s:%d expected %d columns but found %d - ignored"
% (filename, i, ncols, len(row)),
file=sys.stderr,
)
nignored += 1
continue
cur.execute(insert_tmpl, row)
ninserted += 1
cur.execute("COMMIT")
status = "Inserted %d rows into %s" % (ninserted, table)
if nignored > 0:
status += " (%d rows are ignored)" % nignored
return [(None, None, None, status)]
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