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CHANGELOG.md

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Change Log

v2.1.1

  • Improve support of ClickHouse v21.9 (mangototango)
  • Ignore non-numeric parts in ClickHouse version (mangototango)
  • Fix precedence of ~ operator in Q objects (mangototango)
  • Support for adding a column to the beginning of a table (meanmail)
  • Add stddevPop and stddevSamp functions (k.peskov)

v2.1.0

  • Support for model constraints
  • Support for data skipping indexes
  • Support for mutations: QuerySet.update and QuerySet.delete
  • Added functions for working with external dictionaries
  • Support FINAL for ReplacingMergeTree (chripede)
  • Added DateTime64Field (NiyazNz)
  • Make DateTimeField and DateTime64Field timezone-aware (NiyazNz)

Backwards incompatible changes

Previously, DateTimeField always converted its value from the database timezone to UTC. This is no longer the case: the field's value now preserves the timezone it was defined with, or if not specified - the database's global timezone. This change has no effect if your database timezone is set to UTC.

v2.0.1

  • Remove unnecessary import of six

v2.0.0

  • Dropped support for Python 2.x
  • New flexible syntax for database expressions and functions
  • Expressions as default values for model fields
  • Support for IPv4 and IPv6 fields
  • Automatic generation of models by inspecting existing tables
  • Convenient ways to import ORM classes

See What's new in version 2 for details.

v1.4.0

  • Added primary_key parameter to MergeTree engines (M1hacka)
  • Support negative enum values (Romamo)

v1.3.0

  • Support LowCardinality columns in ad-hoc queries
  • Support for LIMIT BY in querysets (utapyngo)

v1.2.0

  • Add support for per-field compression codecs (rbelio, Chocorean)
  • Add support for low cardinality fields (rbelio)

v1.1.0

  • Add PREWHERE support to querysets (M1hacka)
  • Add WITH TOTALS support to querysets (M1hacka)
  • Extend date field range (trthhrtz)
  • Fix parsing of server errors in ClickHouse v19.3.3+
  • Fix pagination when asking for the last page on a query that matches no records
  • Use HTTP Basic Authentication instead of passing the credentials in the URL
  • Support default/alias/materialized for nullable fields
  • Add UUIDField (kpotehin)
  • Add log_statements parameter to database initializer
  • Fix test_merge which fails on ClickHouse v19.8.3
  • Fix querysets using the SystemPart model

v1.0.4

  • Added timeout parameter to database initializer (SUHAR1K)
  • Added verify_ssl_cert parameter to database initializer
  • Added final() method to querysets (M1hacka)
  • Fixed a migrations problem - cannot add a new materialized field after a regular field

v1.0.3

  • Bug fix: QuerySet.count() ignores slicing
  • Bug fix: wrong parentheses when building queries using Q objects
  • Support Decimal fields
  • Added Database.add_setting method

v1.0.2

  • Include alias and materialized fields in queryset results
  • Check for database existence, to allow delayed creation
  • Added Database.does_table_exist method
  • Support for IS NULL and IS NOT NULL in querysets (kalombos)

v1.0.1

  • NullableField: take extra_null_values into account in validate and to_python
  • Added Field.isinstance method
  • Validate the inner field passed to ArrayField

v1.0.0

  • Add support for compound filters with Q objects (desile)
  • Add support for BETWEEN operator (desile)
  • Distributed engine support (tsionyx)
  • _fields and _writable_fields are OrderedDicts - note that this might break backwards compatibility (tsionyx)
  • Improve error messages returned from the database with the ServerError class (tsionyx)
  • Added support for custom partitioning (M1hacka)
  • Added attribute server_version to Database class (M1hacka)
  • Changed Engine.create_table_sql(), Engine.drop_table_sql(), Model.create_table_sql(), Model.drop_table_sql() parameter to db from db_name (M1hacka)
  • Fix parsing of datetime column type when it includes a timezone (M1hacka)
  • Rename Model.system to Model._system to prevent collision with a column that has the same name
  • Rename Model.readonly to Model._readonly to prevent collision with a column that has the same name
  • The field_names argument to Model.to_tsv is now mandatory
  • Improve creation time of model instances by keeping a dictionary of default values
  • Fix queryset bug when field name contains double underscores (YouCanKeepSilence)
  • Prevent exception when determining timezone of old ClickHouse versions (vv-p)

v0.9.8

  • Bug fix: add field names list explicitly to Database.insert method (anci)
  • Added RunPython and RunSQL migrations (M1hacka)
  • Allow ISO-formatted datetime values (tsionyx)
  • Show field name in error message when invalid value assigned (tsionyx)
  • Bug fix: select query fails when query contains '$' symbol (M1hacka)
  • Prevent problems with AlterTable migrations related to field order (M1hacka)
  • Added documentation about custom fields.

v0.9.7

  • Add distinct method to querysets
  • Add AlterTableWithBuffer migration operation
  • Support Merge engine (M1hacka)

v0.9.6

  • Fix python3 compatibility (TvoroG)
  • Nullable arrays not supported in latest ClickHouse version
  • system.parts table no longer includes "replicated" column in latest ClickHouse version

v0.9.5

  • Added QuerySet.paginate()
  • Support for basic aggregation in querysets

v0.9.4

  • Migrations: when creating a table for a BufferModel, create the underlying table too if necessary

v0.9.3

  • Changed license from PSF to BSD
  • Nullable fields support (yamiou)
  • Support for queryset slicing

v0.9.2

  • Added ne and not_in queryset operators
  • Querysets no longer have a default order unless order_by is called
  • Added autocreate flag to database initializer
  • Fix some Python 2/3 incompatibilities (TvoroG, tsionyx)
  • To work around a JOIN bug in ClickHouse, $table now inserts only the table name, and the database name is sent in the query params instead

v0.9.0

  • Major new feature: building model queries using QuerySets
  • Refactor and expand the documentation
  • Add support for FixedString fields
  • Add support for more engine types: TinyLog, Log, Memory
  • Bug fix: Do not send readonly=1 when connection is already in readonly mode

v0.8.2

  • Fix broken Python 3 support (M1hacka)

v0.8.1

  • Add support for ReplacingMergeTree (leenr)
  • Fix problem with SELECT WITH TOTALS (pilosus)
  • Update serialization format of DateTimeField to 10 digits, zero padded (nikepan)
  • Greatly improve performance when inserting large strings (credit to M1hacka for identifying the problem)
  • Reduce memory footprint of Database.insert()

v0.8.0

  • Always keep datetime fields in UTC internally, and convert server timezone to UTC when parsing query results
  • Support for ALIAS and MATERIALIZED fields (M1ha)
  • Pagination: passing -1 as the page number now returns the last page
  • Accept datetime values for date fields (Zloool)
  • Support readonly mode in Database class (tswr)
  • Added support for the Buffer table engine (emakarov)
  • Added the SystemPart readonly model, which provides operations on partitions (M1ha)
  • Added Model.to_dict() that converts a model instance to a dictionary (M1ha)
  • Added Database.raw() to perform arbitrary queries (M1ha)

v0.7.1

  • Accept '0000-00-00 00:00:00' as a datetime value (tsionyx)
  • Bug fix: parse_array fails on int arrays
  • Improve performance when inserting many rows

v0.7.0

  • Support array fields
  • Support enum fields

v0.6.3

  • Python 3 support