OwlCyberSecurity - MANAGER
Edit File: operations.cpython-39.pyc
a kH�f q � @ s~ d dl Z d dlZd dlZd dlmZ d dlZd dlmZ d dlm Z m Z d dl m Z d dl mZ d dlmZ G dd � d �ZdS ) � N)� import_module)�settings)�NotSupportedError� transaction)�utils)�timezone�� force_strc @ s� e Zd ZdZdZdddddddddd � Zd d d d �Zi ZdZdZ dZ de Z de Z dZ dZdd� Zdd� Zdd� Zdd� Zdd � Zd d � Zd d � Zd�d!d"�Zd#d$� Zd%d&� Zd'd(� Zd)d*� Zd�d+d,�Zd-d.� Z d/d0� Z d1d2� Z d3d4� Z d5d6� Z d7d8� Z!d�d;d<�Z"d=d>� Z#d?d@� Z$dAdB� Z%dCdD� Z&d�dEdF�Z'dGdH� Z(dIdJ� Z)dKdL� Z*dMdN� Z+dOdP� Z,dQdR� Z-dSdT� Z.dUdV� Z/dWdX� Z0dYdZ� Z1d[d\� Z2d]d^� Z3d_d`� Z4dadb� Z5d9d9dc�ddde�Z6dfdg� Z7dhdi� Z8djdk� Z9dldm� Z:d�dodp�Z;d�dqdr�Z<dsdt� Z=e=Z>dudv� Z?dwdx� Z@dydz� ZAd{d|� ZBd}d~� ZCdd�� ZDd�d�d��ZEd�d�� ZFd�d�� ZGd�d�d��ZHd�d�d��ZId�d�� ZJd�d�� ZKd�d�� ZLd�d�� ZMd�d�� ZNd�d�� ZOd�d�� ZPd�d�� ZQd�d�� ZRd�d�� ZSd�d�� ZTd�d�� ZUd�d�d��ZVd�d�d��ZWd�d�d��ZXd�d�d��ZYd�d�� ZZdS )��BaseDatabaseOperationsz� Encapsulate backend-specific differences, such as the way a backend performs ordering or calculates the ID of a recently-inserted row. z django.db.models.sql.compiler)i ���� )i ���)l���� � ���� )r r )r r )r r ) ZSmallIntegerFieldZ IntegerFieldZBigIntegerFieldZPositiveBigIntegerFieldZPositiveSmallIntegerFieldZPositiveIntegerFieldZSmallAutoFieldZ AutoFieldZ BigAutoFieldZUNIONZ INTERSECTZEXCEPT)�union� intersection� differenceN� PRECEDING� FOLLOWINGz UNBOUNDED z CURRENT ROWc C s || _ d | _d S �N)� connection�_cache)�selfr � r �d/home/gouroczh/virtualenv/test/3.9/lib/python3.9/site-packages/django/db/backends/base/operations.py�__init__: s z BaseDatabaseOperations.__init__c C s dS )z� Return any SQL needed to support auto-incrementing primary keys, or None if no SQL is necessary. This SQL is executed when a table is created. Nr )r �table�columnr r r � autoinc_sql> s z"BaseDatabaseOperations.autoinc_sqlc C s t |�S )z� Return the maximum allowed batch size for the backend. The fields are the fields going to be inserted in the batch, the objs contains all the objects to be inserted. )�len)r �fieldsZobjsr r r �bulk_batch_sizeG s z&BaseDatabaseOperations.bulk_batch_sizec C s t d��d S )Nz[subclasses of BaseDatabaseOperations may require a format_for_duration_arithmetic() method.��NotImplementedError�r �sqlr r r � format_for_duration_arithmeticO s �z5BaseDatabaseOperations.format_for_duration_arithmeticc C s | � d�}d|� d|� d�S )z� Return an SQL query that retrieves the first cache key greater than the n smallest. This is used by the 'db' cache backend to determine where to start culling. � cache_keyzSELECT z FROM %s ORDER BY z LIMIT 1 OFFSET %%s�� quote_name)r r% r r r �cache_key_culling_sqlU s z,BaseDatabaseOperations.cache_key_culling_sqlc C s dS )z� Given a field instance, return the SQL that casts the result of a union to that type. The resulting string should contain a '%s' placeholder for the expression being cast. �%sr )r Z output_fieldr r r �unification_cast_sql` s z+BaseDatabaseOperations.unification_cast_sqlc C s t d��dS )z� Given a lookup_type of 'year', 'month', or 'day', return the SQL that extracts a value from the given date field field_name. zLsubclasses of BaseDatabaseOperations may require a date_extract_sql() methodNr �r � lookup_typer# �paramsr r r �date_extract_sqlh s �z'BaseDatabaseOperations.date_extract_sqlc C s t d��dS )a. Given a lookup_type of 'year', 'month', or 'day', return the SQL that truncates the given date or datetime field field_name to a date object with only the given specificity. If `tzname` is provided, the given value is truncated in a specific timezone. zKsubclasses of BaseDatabaseOperations may require a date_trunc_sql() method.Nr �r r, r# r- �tznamer r r �date_trunc_sqlr s �z%BaseDatabaseOperations.date_trunc_sqlc C s t d��dS )zH Return the SQL to cast a datetime value to date value. zSsubclasses of BaseDatabaseOperations may require a datetime_cast_date_sql() method.Nr �r r# r- r0 r r r �datetime_cast_date_sql� s �z-BaseDatabaseOperations.datetime_cast_date_sqlc C s t d��dS )zH Return the SQL to cast a datetime value to time value. zRsubclasses of BaseDatabaseOperations may require a datetime_cast_time_sql() methodNr r2 r r r �datetime_cast_time_sql� s �z-BaseDatabaseOperations.datetime_cast_time_sqlc C s t d��dS )z� Given a lookup_type of 'year', 'month', 'day', 'hour', 'minute', or 'second', return the SQL that extracts a value from the given datetime field field_name. zPsubclasses of BaseDatabaseOperations may require a datetime_extract_sql() methodNr r/ r r r �datetime_extract_sql� s �z+BaseDatabaseOperations.datetime_extract_sqlc C s t d��dS )z� Given a lookup_type of 'year', 'month', 'day', 'hour', 'minute', or 'second', return the SQL that truncates the given datetime field field_name to a datetime object with only the given specificity. zNsubclasses of BaseDatabaseOperations may require a datetime_trunc_sql() methodNr r/ r r r �datetime_trunc_sql� s �z)BaseDatabaseOperations.datetime_trunc_sqlc C s t d��dS )a1 Given a lookup_type of 'hour', 'minute' or 'second', return the SQL that truncates the given time or datetime field field_name to a time object with only the given specificity. If `tzname` is provided, the given value is truncated in a specific timezone. zJsubclasses of BaseDatabaseOperations may require a time_trunc_sql() methodNr r/ r r r �time_trunc_sql� s �z%BaseDatabaseOperations.time_trunc_sqlc C s | � |||�S )z� Given a lookup_type of 'hour', 'minute', or 'second', return the SQL that extracts a value from the given time field field_name. )r. r+ r r r �time_extract_sql� s z'BaseDatabaseOperations.time_extract_sqlc C s dS )zs Return the SQL to make a constraint "initially deferred" during a CREATE TABLE statement. � r �r r r r �deferrable_sql� s z%BaseDatabaseOperations.deferrable_sqlc C s |rt d��n dgg fS dS )z� Return an SQL DISTINCT clause which removes duplicate rows from the result set. If any fields are given, only check the given fields for duplicates. z<DISTINCT ON fields is not supported by this database backendZDISTINCTN)r )r r r- r r r � distinct_sql� s �z#BaseDatabaseOperations.distinct_sqlc C s |� � S )z� Given a cursor object that has just performed an INSERT...RETURNING statement into a table, return the newly created data. )Zfetchone)r �cursorZreturning_paramsr r r � fetch_returned_insert_columns� s z4BaseDatabaseOperations.fetch_returned_insert_columnsc C s dS )a) Given a column type (e.g. 'BLOB', 'VARCHAR') and an internal type (e.g. 'GenericIPAddressField'), return the SQL to cast it before using it in a WHERE statement. The resulting string should contain a '%s' placeholder for the column being searched against. r) r )r Zdb_type� internal_typer r r �field_cast_sql� s z%BaseDatabaseOperations.field_cast_sqlc C s g S )z� Return a list used in the "ORDER BY" clause to force no ordering at all. Return an empty list to include nothing in the ordering. r r: r r r �force_no_ordering� s z(BaseDatabaseOperations.force_no_orderingFr c C s: d|r dnd|r dd� |� nd|r(dnd|r2dndf S )zX Return the FOR UPDATE SQL clause to lock rows for an update operation. zFOR%s UPDATE%s%s%sz NO KEYr9 z OF %s�, z NOWAITz SKIP LOCKED��join)r ZnowaitZ skip_lockedZofZno_keyr r r �for_update_sql� s �z%BaseDatabaseOperations.for_update_sqlc C s8 |pd}|d ur || |fS |r0| j j�� |fS d |fS �Nr )r �ops�no_limit_value)r �low_mark� high_mark�offsetr r r �_get_limit_offset_params� s z/BaseDatabaseOperations._get_limit_offset_paramsc C s@ | � ||�\}}d�dd� |r&d| nd|r4d| ndfD ��S )z Return LIMIT/OFFSET SQL clause.� c s s | ]}|r|V qd S r r )�.0r# r r r � <genexpr>� s �z:BaseDatabaseOperations.limit_offset_sql.<locals>.<genexpr>zLIMIT %dNz OFFSET %d)rL rD )r rI rJ �limitrK r r r �limit_offset_sql� s ��z'BaseDatabaseOperations.limit_offset_sqlc s^ dd� � t |ttf�r.t� fdd�|D ��}n$|du r<d}n� fdd�|�� D �}d ||f S ) a� Return a string of the query last executed by the given cursor, with placeholders replaced with actual values. `sql` is the raw query containing placeholders and `params` is the sequence of parameters. These are used by default, but this method exists for database backends to provide a better implementation according to their own quoting schemes. c S s t | ddd�S )NT�replace)Z strings_only�errorsr )�sr r r � to_string s z=BaseDatabaseOperations.last_executed_query.<locals>.to_stringc 3 s | ]}� |�V qd S r r )rN �val�rU r r rO � z=BaseDatabaseOperations.last_executed_query.<locals>.<genexpr>Nr c s i | ]\}}� |�� |��qS r r )rN �k�vrW r r � <dictcomp> rX z>BaseDatabaseOperations.last_executed_query.<locals>.<dictcomp>zQUERY = %r - PARAMS = %r)� isinstance�list�tuple�items)r r= r# r- Zu_paramsr rW r �last_executed_query s z*BaseDatabaseOperations.last_executed_queryc C s |j S )z� Given a cursor object that has just performed an INSERT statement into a table that has an auto-incrementing ID, return the newly created ID. `pk_name` is the name of the primary-key column. )Z lastrowid)r r= Z table_nameZpk_namer r r �last_insert_id s z%BaseDatabaseOperations.last_insert_idc C s dS )z� Return the string to use in a query when performing lookups ("contains", "like", etc.). It should contain a '%s' placeholder for the column being searched against. r) r )r r, r? r r r � lookup_cast' s z"BaseDatabaseOperations.lookup_castc C s dS )z� Return the maximum number of items that can be passed in a single 'IN' list condition, or None if the backend does not impose a limit. Nr r: r r r �max_in_list_size/ s z'BaseDatabaseOperations.max_in_list_sizec C s dS )zl Return the maximum length of table and column names, or None if there is no limit. Nr r: r r r �max_name_length6 s z&BaseDatabaseOperations.max_name_lengthc C s t d��dS )z� Return the value to use for the LIMIT when we are wanting "LIMIT infinity". Return None if the limit clause can be omitted in this case. zJsubclasses of BaseDatabaseOperations may require a no_limit_value() methodNr r: r r r rH = s �z%BaseDatabaseOperations.no_limit_valuec C s dS )z� Return the value to use during an INSERT statement to specify that the field should use its default value. �DEFAULTr r: r r r �pk_default_valueF s z'BaseDatabaseOperations.pk_default_valuec C s dd� t �|�D �S )ag Take an SQL script that may contain multiple lines and return a list of statements to feed to successive cursor.execute() calls. Since few databases are able to process raw SQL scripts in a single cursor.execute() call and PEP 249 doesn't talk about this use case, the default implementation is conservative. c S s g | ]}|rt j|d d��qS )T)�strip_comments)�sqlparse�format)rN Z statementr r r � <listcomp>V s �z=BaseDatabaseOperations.prepare_sql_script.<locals>.<listcomp>)rh �splitr" r r r �prepare_sql_scriptM s �z)BaseDatabaseOperations.prepare_sql_scriptc C s |S )z� Return the value of a CLOB column, for backends that return a locator object that requires additional processing. r �r �valuer r r � process_clob\ s z#BaseDatabaseOperations.process_clobc C s dS )z� For backends that support returning columns as part of an insert query, return the SQL and params to append to the INSERT query. The returned fragment should contain a format string to hold the appropriate column. Nr )r r r r r �return_insert_columnsc s z,BaseDatabaseOperations.return_insert_columnsc C s" | j du rt| j�| _ t| j |�S )z� Return the SQLCompiler class corresponding to the given name, in the namespace corresponding to the `compiler_module` attribute on this backend. N)r r �compiler_module�getattr)r Z compiler_namer r r �compilerk s z BaseDatabaseOperations.compilerc C s t d��dS )z� Return a quoted version of the given table, index, or column name. Do not quote the given name if it's already been quoted. zFsubclasses of BaseDatabaseOperations may require a quote_name() methodNr )r �namer r r r' u s �z!BaseDatabaseOperations.quote_namec C s t d��dS )aG Return the string to use in a query when performing regular expression lookups (using "regex" or "iregex"). It should contain a '%s' placeholder for the column being searched against. If the feature is not supported (or part of it is not supported), raise NotImplementedError. zHsubclasses of BaseDatabaseOperations may require a regex_lookup() methodNr )r r, r r r � regex_lookup~ s �z#BaseDatabaseOperations.regex_lookupc C s d| � |� S )z� Return the SQL for starting a new savepoint. Only required if the "uses_savepoints" feature is True. The "sid" parameter is a string for the savepoint id. z SAVEPOINT %sr& �r Zsidr r r �savepoint_create_sql� s z+BaseDatabaseOperations.savepoint_create_sqlc C s d| � |� S )zD Return the SQL for committing the given savepoint. zRELEASE SAVEPOINT %sr& rv r r r �savepoint_commit_sql� s z+BaseDatabaseOperations.savepoint_commit_sqlc C s d| � |� S )zF Return the SQL for rolling back the given savepoint. zROLLBACK TO SAVEPOINT %sr& rv r r r �savepoint_rollback_sql� s z-BaseDatabaseOperations.savepoint_rollback_sqlc C s dS )z� Return the SQL that will set the connection's time zone. Return '' if the backend doesn't support time zones. r9 r r: r r r �set_time_zone_sql� s z(BaseDatabaseOperations.set_time_zone_sql)�reset_sequences� allow_cascadec C s t d��dS )a� Return a list of SQL statements required to remove all data from the given database tables (without actually removing the tables themselves). The `style` argument is a Style object as returned by either color_style() or no_style() in django.core.management.color. If `reset_sequences` is True, the list includes SQL statements required to reset the sequences. The `allow_cascade` argument determines whether truncation may cascade to tables with foreign keys pointing the tables being truncated. PostgreSQL requires a cascade even if these tables are empty. zGsubclasses of BaseDatabaseOperations must provide an sql_flush() methodNr )r �styleZtablesr{ r| r r r � sql_flush� s �z BaseDatabaseOperations.sql_flushc C sz t j| jj| jjjd��N | j�� �$}|D ]}|�|� q*W d � n1 sN0 Y W d � n1 sl0 Y dS )z7Execute a list of SQL statements to flush the database.)�usingZ savepointN)r Zatomicr �alias�featuresZcan_rollback_ddlr= �execute)r Zsql_listr= r# r r r �execute_sql_flush� s � z(BaseDatabaseOperations.execute_sql_flushc C s g S )z� Return a list of the SQL statements required to reset sequences passed in `sequences`. The `style` argument is a Style object as returned by either color_style() or no_style() in django.core.management.color. r )r r} � sequencesr r r �sequence_reset_by_name_sql� s z1BaseDatabaseOperations.sequence_reset_by_name_sqlc C s g S )z� Return a list of the SQL statements required to reset sequences for the given models. The `style` argument is a Style object as returned by either color_style() or no_style() in django.core.management.color. r )r r} Z model_listr r r �sequence_reset_sql� s z)BaseDatabaseOperations.sequence_reset_sqlc C s dS )z9Return the SQL statement required to start a transaction.zBEGIN;r r: r r r �start_transaction_sql� s z,BaseDatabaseOperations.start_transaction_sqlTc C s |sdS dS )z7Return the SQL statement required to end a transaction.z ROLLBACK;zCOMMIT;r )r �successr r r �end_transaction_sql� s z*BaseDatabaseOperations.end_transaction_sqlc C s dS )a Return the SQL that will be used in a query to define the tablespace. Return '' if the backend doesn't support tablespaces. If `inline` is True, append the SQL to a row; otherwise append it to the entire CREATE TABLE or CREATE INDEX statement. r9 r )r Z tablespace�inliner r r �tablespace_sql� s z%BaseDatabaseOperations.tablespace_sqlc C s t |��dd��dd��dd�S )z(Prepare a value for use in a LIKE query.�\z\\�%z\%�_z\_)�strrR )r �xr r r �prep_for_like_query� s z*BaseDatabaseOperations.prep_for_like_queryc C s |S )z� Certain backends do not accept some values for "serial" fields (for example zero in MySQL). Raise a ValueError if the value is invalid, otherwise return the validated value. r rm r r r �validate_autopk_value� s z,BaseDatabaseOperations.validate_autopk_valuec C s` t |tj�r| �|�S t |tj�r,| �|�S t |tj�rB| �|�S t |tj�rX| � |�S |S dS )a8 Transform a value to something compatible with the backend driver. This method only depends on the type of the value. It's designed for cases where the target type isn't known, such as .raw() SQL queries. As a consequence it may not work perfectly in all circumstances. N) r\ �datetime�adapt_datetimefield_value�date�adapt_datefield_value�time�adapt_timefield_value�decimal�Decimal�adapt_decimalfield_valuerm r r r �adapt_unknown_value� s z*BaseDatabaseOperations.adapt_unknown_valuec C s |S r r )r rn r? r r r �adapt_integerfield_value s z/BaseDatabaseOperations.adapt_integerfield_valuec C s |du r dS t |�S )z� Transform a date value to an object compatible with what is expected by the backend driver for date columns. N)r� rm r r r r� s z,BaseDatabaseOperations.adapt_datefield_valuec C s" |du r dS t |d�r|S t|�S )z� Transform a datetime value to an object compatible with what is expected by the backend driver for datetime columns. N�resolve_expression)�hasattrr� rm r r r r� s z0BaseDatabaseOperations.adapt_datetimefield_valuec C s4 |du r dS t |d�r|S t�|�r,td��t|�S )z� Transform a time value to an object compatible with what is expected by the backend driver for time columns. Nr� z-Django does not support timezone-aware times.)r� r Zis_aware� ValueErrorr� rm r r r r� * s z,BaseDatabaseOperations.adapt_timefield_valuec C s t �|||�S )z� Transform a decimal.Decimal value to an object compatible with what is expected by the backend driver for decimal (numeric) columns. )r Z format_number)r rn Z max_digitsZdecimal_placesr r r r� 9 s z/BaseDatabaseOperations.adapt_decimalfield_valuec C s |pdS )z{ Transform a string representation of an IP address into the expected type for the backend driver. Nr rm r r r �adapt_ipaddressfield_value@ s z1BaseDatabaseOperations.adapt_ipaddressfield_valuec C s t j||d�S )N)�cls)�json�dumps)r rn �encoderr r r �adapt_json_valueG s z'BaseDatabaseOperations.adapt_json_valuec C sn |r6t j�|dd�}t j�|d dd�t jdd� }n t �|dd�}t �|dd�}| �|�}| �|�}||gS )a9 Return a two-elements list with the lower and upper bound to be used with a BETWEEN operator to query a DateField value using a year lookup. `value` is an int, containing the looked-up year. If `iso_year` is True, return bounds for ISO-8601 week-numbering years. � )�days� � )r� r� �fromisocalendar� timedeltar� )r rn �iso_year�first�secondr r r �!year_lookup_bounds_for_date_fieldJ s � � z8BaseDatabaseOperations.year_lookup_bounds_for_date_fieldc C s� |r6t j �|dd�}t j �|d dd�t jdd� }n$t � |dd�}t � |dddddd�}tjr�t�� }t�||�}t�||�}| �|�}| �|�}||gS )a= Return a two-elements list with the lower and upper bound to be used with a BETWEEN operator to query a DateTimeField value using a year lookup. `value` is an int, containing the looked-up year. If `iso_year` is True, return bounds for ISO-8601 week-numbering years. r� )� microsecondsr� r� � �; i?B ) r� r� r� r ZUSE_TZr Zget_current_timezoneZ make_awarer� )r rn r� r� r� �tzr r r �%year_lookup_bounds_for_datetime_field_ s � � z<BaseDatabaseOperations.year_lookup_bounds_for_datetime_fieldc C s g S )z� Return a list of functions needed to convert field data. Some field types on some backends do not provide data in the correct format, this is the hook for converter functions. r �r � expressionr r r �get_db_convertersx s z(BaseDatabaseOperations.get_db_convertersc C s |d urt �dd|�S d S rF )r� r� )r rn r� r r r r �convert_durationfield_value� s z2BaseDatabaseOperations.convert_durationfield_valuec C s dS )a4 Check that the backend supports the provided expression. This is used on specific backends to rule out known expressions that have problematic or nonexistent implementations. If the expression has a known problem, the backend should raise NotSupportedError. Nr r� r r r �check_expression_support� s z/BaseDatabaseOperations.check_expression_supportc C s dS )zf Return True, if the conditional expression is supported in the WHERE clause. Tr r� r r r �0conditional_expression_supported_in_where_clause� s zGBaseDatabaseOperations.conditional_expression_supported_in_where_clausec C s d| }|� |�S )a Combine a list of subexpressions into a single expression, using the provided connecting operator. This is required because operators can vary between backends (e.g., Oracle with %% and &) and between subexpression types (e.g., date expressions). z %s rC )r � connector�sub_expressions�connr r r �combine_expression� s z)BaseDatabaseOperations.combine_expressionc C s | � ||�S r )r� )r r� r� r r r �combine_duration_expression� s z2BaseDatabaseOperations.combine_duration_expressionc C s dS )z~ Some backends require special syntax to insert binary content (MySQL for example uses '_binary %s'). r) r rm r r r �binary_placeholder_sql� s z-BaseDatabaseOperations.binary_placeholder_sqlc C s |S )zs Allow modification of insert parameters. Needed for Oracle Spatial backend due to #10888. r )r � placeholderr- r r r �modify_insert_params� s z+BaseDatabaseOperations.modify_insert_paramsc C s | j | S )z� Given an integer field internal type (e.g. 'PositiveIntegerField'), return a tuple of the (min_value, max_value) form representing the range of the column type bound to the field. )�integer_field_ranges)r r? r r r �integer_field_range� s z*BaseDatabaseOperations.integer_field_rangec C sD | j jjr4|\}}|\}}d||f g |�|�R fS td| ��d S )Nz (%s - %s)z-This backend does not support %s subtraction.)r r� Z supports_temporal_subtractionr )r r? �lhs�rhsZlhs_sqlZ lhs_paramsZrhs_sqlZ rhs_paramsr r r �subtract_temporals� s �z)BaseDatabaseOperations.subtract_temporalsc C sR t |t�r4|dk r$dt|�| jf S |dkrB| jS n|d u rB| jS td| ��d S )Nr �%d %szGstart argument must be a negative integer, zero, or None, but got '%s'.)r\ �int�absr � CURRENT_ROW�UNBOUNDED_PRECEDINGr� )r �startr r r �window_frame_start� s ��z)BaseDatabaseOperations.window_frame_startc C sN t |t�r0|dkr| jS |dkr>d|| jf S n|d u r>| jS td| ��d S )Nr r� zEend argument must be a positive integer, zero, or None, but got '%s'.)r\ r� r� r �UNBOUNDED_FOLLOWINGr� )r �endr r r �window_frame_end� s ��z'BaseDatabaseOperations.window_frame_endc C s& | j jjstd��| �|�| �|�fS )zU Return SQL for start and end points in an OVER clause window frame. z1This backend does not support window expressions.)r r� Zsupports_over_clauser r� r� )r r� r� r r r �window_frame_rows_start_end� s z2BaseDatabaseOperations.window_frame_rows_start_endc C sN | � ||�\}}| jj}|jrF|r*|dk s6|rF|dkrFtd| jj ��||fS )Nr zA%s only supports UNBOUNDED together with PRECEDING and FOLLOWING.)r� r r� Z4only_supports_unbounded_with_preceding_and_followingr � display_name)r r� r� Zstart_�end_r� r r r � window_frame_range_start_end� s" ������z3BaseDatabaseOperations.window_frame_range_start_endc K s� | j jjstd��|rp| j jj}|�� }||vrpd| }|rT|dd�t|�� 7 }n|d| j j� d�7 }t |��|r�t dd�t|� � �� ��| j S )Nz9This backend does not support explaining query execution.z %s is not a recognized format.z Allowed formats: %srB rM z does not support any formats.zUnknown options: %s) r r� Z#supports_explaining_query_executionr Zsupported_explain_formats�upperrD �sortedr� r� �keys�explain_prefix)r ri �optionsZsupported_formatsZnormalized_format�msgr r r �explain_query_prefix� s$ � �z+BaseDatabaseOperations.explain_query_prefixc C s dS )Nz INSERT INTOr )r � on_conflictr r r �insert_statement s z'BaseDatabaseOperations.insert_statementc C s dS )Nr9 r )r r r� Z update_fieldsZ unique_fieldsr r r �on_conflict_suffix_sql s z-BaseDatabaseOperations.on_conflict_suffix_sql)N)N)FFr F)N)T)F)NN)F)F)NN)NN)N)N)[�__name__� __module__� __qualname__�__doc__rq r� Z set_operatorsZcast_data_typesZ"cast_char_field_without_max_lengthr r r� r� r� r� r r r r$ r( r* r. r1 r3 r4 r5 r6 r7 r8 r; r< r> r@ rA rE rL rQ r` ra rb rc rd rH rf rl ro rp rs r' ru rw rx ry rz r~ r� r� r� r� r� r� r� Zprep_for_iexact_queryr� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r r r r r s� � � r )r� r� r� � importlibr rh Z django.confr Z django.dbr r Zdjango.db.backendsr Z django.utilsr Zdjango.utils.encodingr r r r r r �<module> s