
TQc           @  sd  d  Z  d d l m Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l m	 Z	 d d l
 Td d l m Z d d l m Z d d l m Z d d	 l m Z d d
 l m Z m Z m Z d d l m Z d d l m Z d d l m Z d d l m Z y< y d d l m Z  Wn! e! k
 rBd d l" m Z  n XWn3 e! k
 ryZ# d d l$ m% Z% e% d e#   n Xe  j& Z& e  j' Z' d   Z( d   Z) d   Z* e  j+ e, d  e* d     e  j+ e, d  e* e   e  j+ e, d  e* e   e  j+ e, d  e* e(   e  j+ e, d  e* e(   e  j+ e, d  e* e(   e  j+ e, d  e* e- j.   e  j/ e j e)  e  j/ e j0 e- j1  e  j2 d/ k re  j/ e, d     e  j/ e d!    n  d" e3 f d#     YZ4 d$ e5 f d%     YZ6 d& e7 f d'     YZ8 e j9 d(  Z: d) e  j; f d*     YZ< d+   Z= d,   Z> d-   Z? d.   Z@ d S(0   ut   
SQLite3 backend for django.

Works with either the pysqlite2 module or the sqlite3 module in the
standard library.
i(   t   unicode_literalsN(   t   utils(   t   *(   t   connection_created(   t   DatabaseClient(   t   DatabaseCreation(   t   DatabaseIntrospection(   t
   parse_datet   parse_datetimet
   parse_time(   t   cached_property(   t	   SafeBytes(   t   six(   t   timezone(   t   dbapi2(   t   ImproperlyConfigureduK   Error loading either pysqlite2 or sqlite3 modules (tried in that order): %sc         C  sL   t  |   } | d  k	 rH t j rH t j |  rH | j d t j  } n  | S(   Nt   tzinfo(   R   t   Nonet   settingst   USE_TZR   t   is_naivet   replacet   utc(   t   valuet   dt(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt$   parse_datetime_with_timezone_support(   s    $c         C  s   t  j rn t j |   rM t j d |  t  t j   } t j |  |  }  n  |  j	 t j
  j d d   }  n  |  j t d   S(   NuH   SQLite received a naive datetime (%s) while time zone support is active.R   u    (   R   R   R   R   t   warningst   warnt   RuntimeWarningt   get_default_timezonet
   make_awaret
   astimezoneR   R   R   t	   isoformatt   str(   R   t   default_timezone(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt$   adapt_datetime_with_timezone_support/   s    		!c           s     f d   S(   u    The Python sqlite3 interface returns always byte strings.
        This function converts the received value to a regular string before
        passing it to the receiver function.
    c           s     |  j  d   S(   Nu   utf-8(   t   decode(   t   s(   t	   conv_func(    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   <lambda>@   s    (    (   R&   (    (   R&   s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   decoder;   s    u   boolc         C  s
   |  d k S(   Nu   1(    (   R%   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR'   B   s    u   timeu   dateu   datetimeu	   timestampu	   TIMESTAMPu   decimali   i   i   c         C  s   |  j  d  S(   Nu   utf-8(   R$   (   R%   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR'   R   s    c         C  s   |  j  d  S(   Nu   utf-8(   R$   (   R%   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR'   S   s    t   DatabaseFeaturesc           B  sG   e  Z e Z e Z e Z e Z e Z e Z	 e Z
 e Z e d     Z RS(   c         C  sa   |  j  j   } | j d  y | j d  t } Wn t j k
 rO t } n X| j d  | S(   u  Confirm support for STDDEV and related stats functions

        SQLite supports STDDEV as an extension package; so
        connection.ops.check_aggregate_support() can't unilaterally
        rule out support for STDDEV. We need to manually check
        whether the call works.
        u    CREATE TABLE STDDEV_TEST (X INT)u!   SELECT STDDEV(*) FROM STDDEV_TESTu   DROP TABLE STDDEV_TEST(   t
   connectiont   cursort   executet   TrueR   t   DatabaseErrort   False(   t   selfR+   t   has_support(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   supports_stddevc   s    	

(   t   __name__t
   __module__R/   t   can_use_chunked_readst#   test_db_allows_multiple_connectionsR-   t   supports_unspecified_pkt   supports_timezonest   supports_1000_query_parameterst(   supports_mixed_date_datetime_comparisonst   has_bulk_insertt6   can_combine_inserts_with_and_without_auto_increment_pkR
   R2   (    (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR)   U   s   t   DatabaseOperationsc           B  s   e  Z d    Z d   Z d   Z d   Z d   Z d   Z d   Z d   Z	 d   Z
 d	   Z d
   Z d   Z d   Z d   Z RS(   c         C  sH   t  |  d k r d n d } t  |  d k r> | t  |  St  |  S(   u  
        SQLite has a compile-time default (SQLITE_LIMIT_VARIABLE_NUMBER) of
        999 variables per query.

        If there is just single field to insert, then we can hit another
        limit, SQLITE_MAX_COMPOUND_SELECT which defaults to 500.
        i   i  i  i    (   t   len(   R0   t   fieldst   objst   limit(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   bulk_batch_sizew   s    c         C  s   d | j    | f S(   Nu   django_extract('%s', %s)(   t   lower(   R0   t   lookup_typet
   field_name(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   date_extract_sql   s    c         C  s    d | | | j  | j | j f S(   Nu1   django_format_dtdelta(%s, "%s", "%d", "%d", "%d")(   t   dayst   secondst   microseconds(   R0   t   sqlt	   connectort	   timedelta(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   date_interval_sql   s    c         C  s   d | j    | f S(   Nu   django_date_trunc('%s', %s)(   RC   (   R0   RD   RE   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   date_trunc_sql   s    c         C  s   d S(   Nu    (    (   R0   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   drop_foreignkey_sql   s    c         C  s   d S(   Nu   NULL(    (   R0   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   pk_default_value   s    c         C  s*   | j  d  r" | j d  r" | Sd | S(   Nu   "u   "%s"(   t
   startswitht   endswith(   R0   t   name(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt
   quote_name   s    c         C  s   d S(   Ni(    (   R0   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   no_limit_value   s    c         C  sN   g  | D]= } d | j  d  | j  d  | j |  j |   f ^ q } | S(   Nu	   %s %s %s;u   DELETEu   FROM(   t   SQL_KEYWORDt	   SQL_FIELDRT   (   R0   t   stylet   tablest	   sequencest   tableRJ   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt	   sql_flush   s    Gc         C  se   | d  k r d  St j |  rX t j rI | j t j  j d d   } qX t d   n  t	 j
 |  S(   NR   uN   SQLite backend does not support timezone-aware datetimes when USE_TZ is False.(   R   R   t   is_awareR   R   R   R   R   t
   ValueErrorR   t	   text_type(   R0   R   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   value_to_db_datetime   s    	!c         C  s;   | d  k r d  St j |  r. t d   n  t j |  S(   Nu5   SQLite backend does not support timezone-aware times.(   R   R   R]   R^   R   R_   (   R0   R   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   value_to_db_time   s
    c         C  s   d } d } | | | | g S(   Nu   %s-01-01u   %s-12-31 23:59:59.999999(    (   R0   R   t   firstt   second(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   year_lookup_bounds   s    c         C  s   | j    } | d k r. t j | j |   S| rC | j d  sO | d k rY t |  S| d k ro t |  S| d k r t |  S| d k r t |  S| S(   u   SQLite returns floats when it should be returning decimals,
        and gets dates and datetimes wrong.
        For consistency with other backends, coerce when required.
        u   DecimalFieldu   IntegerFieldu	   AutoFieldu	   DateFieldu   DateTimeFieldu	   TimeField(	   t   get_internal_typet   utilt   typecast_decimalt   format_numberRR   t   intR   R   R	   (   R0   R   t   fieldt   internal_type(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   convert_values   s    !



c           so   g  } | j  d d j   f d   | D   | j d d j d g t |   g | d  d j |  S(   Nu	   SELECT %su   , c         3  s%   |  ] } d    j  | j  Vq d S(   u	   %%s AS %sN(   RT   t   column(   t   .0t   f(   R0   (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pys	   <genexpr>   s    u   UNION ALL SELECT %su   %si   u    (   t   appendt   joint   extendR>   (   R0   R?   t
   num_valuest   res(    (   R0   s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   bulk_insert_sql   s
    2(   R3   R4   RB   RF   RM   RN   RO   RP   RT   RU   R\   R`   Ra   Rd   Rl   Ru   (    (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR=   v   s   			
								
		t   DatabaseWrapperc           B  s   e  Z d  Z i d d 6d d 6d d 6d d 6d d 6d	 d
 6d d 6d d 6d d 6d d 6d d 6d d 6d d 6d d 6Z d   Z d   Z d   Z d d  Z d   Z	 RS(   u   sqliteu   = %su   exactu   LIKE %s ESCAPE '\'u   iexactu   containsu	   icontainsu	   REGEXP %su   regexu   REGEXP '(?i)' || %su   iregexu   > %su   gtu   >= %su   gteu   < %su   ltu   <= %su   lteu
   startswithu   endswithu   istartswithu	   iendswithc         O  sw   t  t |   j | |   t |   |  _ t |   |  _ t |   |  _ t	 |   |  _
 t |   |  _ t |   |  _ d  S(   N(   t   superRv   t   __init__R)   t   featuresR=   t   opsR   t   clientR   t   creationR   t   introspectiont   BaseDatabaseValidationt
   validation(   R0   t   argst   kwargs(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyRx     s    c         C  s)  |  j  } | d s2 d d l m } | d   n  i | d d 6t j t j Bd 6} | j | d  d | k r | d r t j d	 t	  n  | j i t
 d 6 t j |   |  _ |  j j d
 d t  |  j j d d t  |  j j d d t  |  j j d d t  t j d |  j d |   d  S(   Nu   NAMEi(   R   uJ   settings.DATABASES is improperly configured. Please supply the NAME value.u   databaseu   detect_typesu   OPTIONSu   check_same_threadu   The `check_same_thread` option was provided and set to True. It will be overriden with False. Use the `DatabaseWrapper.allow_thread_sharing` property instead for controlling thread shareability.u   django_extracti   u   django_date_truncu   regexpu   django_format_dtdeltai   t   senderR*   (   t   settings_dictt   django.core.exceptionsR   t   Databaset   PARSE_DECLTYPESt   PARSE_COLNAMESt   updateR   R   R   R/   t   connectR*   t   create_functiont   _sqlite_extractt   _sqlite_date_trunct   _sqlite_regexpt   _sqlite_format_dtdeltaR   t   sendt	   __class__(   R0   R   R   R   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   _sqlite_create_connection  s(    	

c         C  s/   |  j  d  k r |  j   n  |  j  j d t  S(   Nt   factory(   R*   R   R   R+   t   SQLiteCursorWrapper(   R0   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   _cursor0  s    c   
      C  s  |  j    } | d k r- |  j j |  } n  x | D] } |  j j | |  } | s[ q4 n  |  j j | |  } x | D] \ } } } | j d | | | | | | | | f  xD | j   D]6 }	 t j	 d | |	 d | | |	 d | | f   q Wqw Wq4 Wd S(   u  
        Checks each table name in `table_names` for rows with invalid foreign key references. This method is
        intended to be used in conjunction with `disable_constraint_checking()` and `enable_constraint_checking()`, to
        determine if rows with invalid references were entered while constraint checks were off.

        Raises an IntegrityError on the first invalid foreign key reference encountered (if any) and provides
        detailed information about the invalid reference in the error message.

        Backends can override this method if they can more directly apply constraint checking (e.g. via "SET CONSTRAINTS
        ALL IMMEDIATE")
        u  
                    SELECT REFERRING.`%s`, REFERRING.`%s` FROM `%s` as REFERRING
                    LEFT JOIN `%s` as REFERRED
                    ON (REFERRING.`%s` = REFERRED.`%s`)
                    WHERE REFERRING.`%s` IS NOT NULL AND REFERRED.`%s` IS NULLu   The row in table '%s' with primary key '%s' has an invalid foreign key: %s.%s contains a value '%s' that does not have a corresponding value in %s.%s.i    i   N(
   R+   R   R}   t   table_namest   get_primary_key_columnt   get_key_columnsR,   t   fetchallR   t   IntegrityError(
   R0   R   R+   t
   table_namet   primary_key_column_namet   key_columnst   column_namet   referenced_table_namet   referenced_column_namet   bad_row(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   check_constraints5  s"    	c         C  s1   |  j    |  j d d k r- t j |   n  d  S(   Nu   NAMEu   :memory:(   t   validate_thread_sharingR   t   BaseDatabaseWrappert   close(   R0   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR   W  s    
N(
   R3   R4   t   vendort	   operatorsRx   R   R   R   R   R   (    (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyRv      s*   
	
	#	"u   (?<!%)%sR   c           B  s,   e  Z d  Z d d  Z d   Z d   Z RS(   u   
    Django uses "format" style placeholders, but pysqlite2 uses "qmark" style.
    This fixes it -- but note that if you want to use a literal "%s" in a query,
    you'll need to use "%%s".
    c         C  s   |  j  |  } y t j j |  | |  SWn t j k
 rs } t j t j t j t | j	    t
 j   d  nH t j k
 r } t j t j t j t | j	    t
 j   d  n Xd  S(   Ni   (   t   convert_queryR   t   CursorR,   R   R   t   reraiseR   t   tupleR   t   syst   exc_infoR.   (   R0   t   queryt   paramst   e(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR,   g  s    5c         C  s   |  j  |  } y t j j |  | |  SWn t j k
 rs } t j t j t j t | j	    t
 j   d  nH t j k
 r } t j t j t j t | j	    t
 j   d  n Xd  S(   Ni   (   R   R   R   t   executemanyR   R   R   R   R   R   R   R   R.   (   R0   R   t
   param_listR   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR   p  s    5c         C  s   t  j d |  j d d  S(   Nu   ?u   %%u   %(   t   FORMAT_QMARK_REGEXt   subR   (   R0   R   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR   y  s    (    (   R3   R4   t   __doc__R,   R   R   (    (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR   a  s   			c         C  sm   | d  k r d  Sy t j |  } Wn t t f k
 r= d  SX|  d k r\ | j   d d St | |   Sd  S(   Nu   week_dayi   i   (   R   Rf   t   typecast_timestampR^   t	   TypeErrort
   isoweekdayt   getattr(   RD   R   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR   |  s    c         C  s   y t  j |  } Wn t t f k
 r- d  SX|  d k rE d | j S|  d k re d | j | j f S|  d k r d | j | j | j f Sd  S(   Nu   yearu   %i-01-01 00:00:00u   monthu   %i-%02i-01 00:00:00u   dayu   %i-%02i-%02i 00:00:00(   Rf   R   R^   R   R   t   yeart   montht   day(   RD   R   (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR     s    c         C  s   yc t  j |   }  t j t |  t |  t |   } | j   d k rX |  | }  n
 |  | }  Wn t t f k
 r} d  SXt	 |   S(   Nu   +(
   Rf   R   t   datetimeRL   Ri   t   stripR^   R   R   R!   (   R   t   connRG   t   secst   usecst   delta(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR     s    'c         C  s   t  t j |  |   S(   N(   t   boolt   ret   search(   t
   re_patternt	   re_string(    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyR     s    (   i   i   i   (A   R   t
   __future__R    R   t   decimalR   R   R   t	   django.dbR   t   django.db.backendst   django.db.backends.signalsR   t!   django.db.backends.sqlite3.clientR   t#   django.db.backends.sqlite3.creationR   t(   django.db.backends.sqlite3.introspectionR   t   django.utils.dateparseR   R   R	   t   django.utils.functionalR
   t   django.utils.safestringR   t   django.utilsR   R   t	   pysqlite2R   R   t   ImportErrort   sqlite3t   excR   R   R.   R   R   R#   R(   t   register_converterR!   Rf   Rg   t   register_adaptert   Decimalt   rev_typecast_decimalt   version_infot   BaseDatabaseFeaturesR)   t   BaseDatabaseOperationsR=   R   Rv   t   compileR   R   R   R   R   R   R   (    (    (    s8   ../Django//lib/python/django/db/backends/sqlite3/base.pyt   <module>   sf   
					!wr			