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Wñúh_ ã óà d Z ddlZddlmZmZ ddlmZmZmZmZm Z m
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Z
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m Z m Z m Z mZmZ ddlmZ ddlmZ ddlmZ ddlmZ dd lmZmZ dd
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lm Z dd l m Z ddl Z dd l!m"Z" dd l#m$Z$ ddl%m&Z& ddl m'Z'm(Z(m)Z) ddl,m-Z- dZ.ddl/m0Z0 ddl1m2Z2 ddl3m4Z4 ddl5m6Z6 ddl7m8Z8 ddl9m:Z: ddl;m<Z< e jz j| Z>e jz j~ Z?e jz j Z@e jz j ZAe jz j ZBerdd lCmDZDmEZE d ed e)fd ZF G d d!« ZG G d" d#e« ZH G d$ d%e"« ZIy# e*$ rZ+ ede+ « e+dZ+[+ww xY w# e*$ r dZ.Y íw xY w)&a¥ Django database Backend using MySQL Connector/Python.
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This Django database backend is heavily based on the MySQL backend from Django.
|
|
Changes include:
|
* Support for microseconds (MySQL 5.6.3 and later)
|
* Using INFORMATION_SCHEMA where possible
|
* Using new defaults for, for example SQL_AUTO_IS_NULL
|
|
Requires and comes with MySQL Connector/Python v8.0.22 and later:
|
http://dev.mysql.com/downloads/connector/python/
|
é N)ÚdatetimeÚtime) Ú TYPE_CHECKINGÚAnyÚDictÚ GeneratorÚIteratorÚListÚOptionalÚSequenceÚSetÚTupleÚUnion)Úsettings)ÚImproperlyConfigured)ÚIntegrityError)ÚBaseDatabaseWrapper)Ú dateparseÚtimezone)Úcached_property)ÚMySQLConvertibleType)ÚMySQLConverter)Ú
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d| dt « t j « }t j | |« } | j t j « j d¬« } t r t | « }|S | j d« S )zDEquivalent to DateTimeField.get_db_prep_value. Used only by raw SQL.z!MySQL received a naive datetime (z$) while time zone support is active.N)Útzinfoz%Y-%m-%d %H:%M:%S.%f)r ÚUSE_TZr Úis_naiveÚwarningsÚwarnÚRuntimeWarningÚget_default_timezoneÚ
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fd Zd edefdZdee fdZy)Ú CursorWrapperzãWrapper around MySQL Connector/Python's cursor class.
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mainly needed to re-raise using different exceptions.
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This wrapper method around the executemany()-method of the cursor is
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r N) rB Ú executemanyrX rY rZ rF r[ r rQ )rD rU rF r\ s r; r^ zCursorWrapper.executemany sf ð Ø;;×*Ñ*¨5°$Ó7Ð 7øÜ×/Ñ/ò Øxx{d× ;Ñ ;Ñ;Ü$¤e¨C¯H©H£oÐ6¸DÐ@Ø ûð ús A8»8A3Á3A8Úattrc ó. t | j |« S )z%Return an attribute of wrapped cursor)ÚgetattrrB ©rD r_ s r; Ú __getattr__zCursorWrapper.__getattr__Õ s ät{{ DÓ)Ð)r= c ó, t | j « S )z&Return an iterator over wrapped cursor)ÚiterrB ©rD s r; Ú__iter__zCursorWrapper.__iter__Ù s äDKKÓ Ð r= )rB r( r* NrA )Ú__name__Ú
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mediumtextr r z= %szLIKE %szLIKE CAST(%s AS BINARY)z> %sz>= %sz< %sz<= %s) ÚexactÚiexactÚcontainsÚ icontainsÚgtÚgteÚltÚlteÚ
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startswithÚendswithÚ istartswithÚ iendswithzCREPLACE(REPLACE(REPLACE({}, '\\', '\\\\'), '%%', '\%%'), '_', '\_')z+LIKE CAST(CONCAT('%%', {}, '%%') AS BINARY)zLIKE CONCAT('%%', {}, '%%')z%LIKE CAST(CONCAT({}, '%%') AS BINARY)zLIKE CONCAT({}, '%%')z%LIKE CAST(CONCAT('%%', {}) AS BINARY)zLIKE CONCAT('%%', {}))r r r£ r¥ r¤ r¦ NÚisolation_level> úread committedúrepeatable readúread uncommittedÚ serializablerF Úkwargsr* c óH t | |i |¤ | j j d« }|rZ|j dt « | _ |j dt « }t |t « s t d« |« | _ y t « | _ t | _ y )NÚOPTIONSÚuse_pureÚconverter_classzXConverter class should be a subclass of mysql.connector.django.base.DjangoMySQLConverter)
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r= c ó
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g }| j j r|j d« | j r,|j d| j j « « |r9| j « 5 }|j dj |« « d d d « d| j v r | j | j d « y y # 1 sw Y 8xY w# t $ r! | j | j d « Y y w xY w)NzSET SQL_AUTO_IS_NULL = 0z(SET SESSION TRANSACTION ISOLATION LEVEL z; Ú
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AUTOCOMMIT) ÚfeaturesÚis_sql_auto_is_null_enabledÚappendr§ ÚupperrB rW rÝ r² Úset_autocommitr½ Ú_set_autocommit)rD Ú assignmentsrB s r; Úinit_connection_statez%DatabaseWrapper.init_connection_state sò Ø Ø ==× 4Ò 4ð
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connectionrB r? )rD rò rB s r; Ú create_cursorz DatabaseWrapper.create_cursor¶ s Ø ×'Ñ'Ó)Ü VÓ$Ð$r= c óN t j | « y # t $ r Y y w xY wrA )r Ú _rollbackÚNotSupportedErrorrf s r; r÷ zDatabaseWrapper._rollbackº s' ð Ü × )Ñ )¨$Õ /øÜ ò Ù ð ús $£$Ú
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autocommitc óh | j 5 || j _ d d d « y # 1 sw Y y xY wrA )Úwrap_database_errorsrô rù )rD rù s r; rï z DatabaseWrapper._set_autocommitÀ s, Ø × &Ñ &ñ 4Ø)3DOOÔ &÷ 4÷ 4ñ 4ús (¨1c óp | j « 5 }|j d« ddd« y# 1 sw Y yxY w)z¿
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Disable foreign key checks, primarily for use in adding rows with
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forward references. Always return True to indicate constraint checks
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need to be re-enabled.
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zSET foreign_key_checks=0NT)rB rW rC s r; Údisable_constraint_checkingz+DatabaseWrapper.disable_constraint_checkingÄ s2 ð [[]ð 7fØ NNÐ5Ô 6÷ 7à÷ 7àús ,¬5c óÀ d| j c| _ } | j « 5 }|j d« ddd« || _ y# 1 sw Y xY w# || _ w xY w)zM
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Re-enable foreign key checks after they have been disabled.
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FzSET foreign_key_checks=1N)Úneeds_rollbackrB rW )rD rÿ rB s r; Úenable_constraint_checkingz*DatabaseWrapper.enable_constraint_checkingÎ s` ð /4°T×5HÑ5HÐ+Ô^ð 1Ø ð ; &ØÐ 9Ô:÷ ;ð #1DÕ ÷ ;ð ;ûð #1DÕ ús! A ¦A¸A ÁAÁ A Á A Ú table_namesc óî | j « 5 }|| j j |« }|D ] }| j j ||« }|s"| j j ||« }|D ]k \ }}}|j d| d| d| d| d| d| d| d | d
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« |j « D ]( } t d | d | d d| d| d| d d| d| d« m ¯ ddd« y# 1 sw Y yxY w)a]
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Check 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
|
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|
checks were off.
|
Nz+
|
SELECT REFERRING.`z&`,
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REFERRING.`z `
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FROM `z2` as REFERRING
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REFERRING.`z*` =
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|
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|
WHERE REFERRING.`z4` IS NOT NULL
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zThe row in table 'z' with primary key 'r z ' has an invalid foreign key: ú.z contains a value 'r z.' that does not have a corresponding value in )rB Ú introspectionr Úget_primary_key_columnÚget_key_columnsrW Úfetchallr )
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rD r rB Ú
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table_nameÚprimary_key_column_nameÚ key_columnsÚ column_nameÚreferenced_table_nameÚreferenced_column_nameÚbad_rows
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|ð ,6à 4Ð 5°QØ 5Ð 6°að 9ó ð ñ ñ' ñ% ÷( ÷ ( ñ ( ús CC+Ã+C4c óX | j j « y# t $ r Y yw xY w)NFT)rô ÚpingÚErrorrf s r; Ú is_usablezDatabaseWrapper.is_usable s0 ð Ø OO× Ñ Ô "ð øô ò Ùð ús )¨)c ó y)z Display name.ÚMySQLrn rn r= r; Ú display_namez DatabaseWrapper.display_name s ð r= c óB | j j rdddd}|S i S )z<Mapping of Field objects to their SQL for CHECK constraints.z`%(column)s` >= 0)r r r )rê Ú!supports_column_check_constraints)rD r s r; Údata_type_check_constraintsz+DatabaseWrapper.data_type_check_constraints s/ ð ==× :Ò :à+>Ø(;Ø-@ñ!Ð ð
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zReturn MySQL server data.a2
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SELECT VERSION(),
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@@sql_mode,
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|
CONVERT_TZ('2001-01-01 01:00:00', 'UTC', 'UTC') IS NOT NULL
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÷ $ð $ús "A1Á1A:c óÚ | j r| j j S | j « 5 }|j d« |j « d cddd« S # 1 sw Y yxY w)úReturn MySQL version.zSELECT VERSION()r N)rô Ú server_infor% rW r& rC s r; Úmysql_server_infoz!DatabaseWrapper.mysql_server_infoA sZ ð ??Ø??×.Ñ.Ð .Ø × &Ñ &Ó (ð (¨FØ NNÐ-Ô .Ø??Ó$ QÑ'÷ (÷ (ò (ús ³$A!Á!A*.c óì | j r| j j S | j « }t j j
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di |¤5 }|j }ddd« |S # 1 sw Y S xY w)r* Nrn )rô Úserver_versionrâ rX rY rå )rD ÚconfigÚconnr. s r; Ú mysql_versionz DatabaseWrapper.mysql_versionJ sj ð ??Ø??×1Ñ1Ð 1Ø×+Ñ+Ó-Ü __× $Ñ $Ñ . vÑ .ð B°$Ø.2×.AÑ.AN÷ Bà Ð ÷ Bà Ð ús Á A)Á)A3c óL | j r.t | j j j d« « S | j « 5 }|j d« |j « }ddd« t r|d j d« « S d« S # 1 sw Y .xY w)zReturn SQL mode.ú,zSELECT @@sql_modeNr rn )rô Úsetr ÚsplitrB rW r& )rD rB r s r; r zDatabaseWrapper.sql_modeT s ð ??Üt×/Ñ/×5Ñ5°cÓ:Ó;Ð ;Ø [[]ð )fØ NNÐ.Ô /Ø Ó(H÷ )ô ©X8A;×$Ñ$ SÓ)Ó>Ð>¸2Ó>Ð>÷ )ð )ús Á "BÂB#c ó | j }|S )z1Return True if pure Python version is being used.)r´ )rD Úanss r; r¯ zDatabaseWrapper.use_pure^ s ð NNØ
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Ù*à Fð
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Ð.ð ð Vð ð ð ð ÐEð ð ð ð Ð.ð ð Ð2ð ð Ð(ð ð ð ð 8ð ð *ð ð ð! ð" Vð# ð$ #Ø"Ø#4Ø 2Ø%8Ø.Ø3Ø 'Ø Ø Ø ò9 JðH
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0 t¨C°¨H¡~ó 0ðdØ S >ðà Ð$Ð&?Ð?Ñ @óóGñ2% #ð %° ó %óð 4¨$ð 4°4ó 4ð¨Tó ó 1ñ0¨X°d¸3±iÑ-@ð 0ÈDó 0ðd4ó ð Øð#ò ó ó ðð ð ¨T°#°s°(©^ò ó ð ð ð
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ð4 ð( 3ò (ó ð(ð ð u S¨# Xò ó ð ð ð?#c(ò ?ó ð?ð ð$ò ó ôr= rp c ó e Zd ZdZed dededee fd« Z ed dededee
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fd« Z de de eef fdZde de eef fd Zdedefd
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Zy) rµ z Custom converter for Django.Nr) Údscr* c óJ t j | j d« « S )zXReturn MySQL TIME data type as datetime.time()
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|
Returns datetime.time()
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zutf-8)r Ú
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parse_timeÚdecode©r) rJ s r; Ú_time_to_pythonz$DjangoMySQLConverter._time_to_pythonj s ô ×#Ñ# E§L¡L°Ó$9Ó:Ð:r= c ó4 | rt j | « S dS )ao Connector/Python always returns naive datetime.datetime
|
|
Connector/Python always returns naive timestamps since MySQL has
|
no time zone support.
|
|
- A naive datetime is a datetime that doesn't know its own timezone.
|
|
Django needs a non-naive datetime, but in this method we don't need
|
to make a datetime value time zone aware since Django itself at some
|
point will make it aware (at least in versions 3.2.16 and 4.1.2) when
|
USE_TZ=True. This may change in a future release, we need to keep an
|
eye on this behaviour.
|
|
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