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* Add IS (NOT) DISTINCT FROM operatorsSebastian Bank2016-06-061-0/+2
| | | | | | | | | | | None / True / False render as literals. For SQLite, "IS" is used as SQLite lacks "IS DISTINCT FROM" but its "IS" operator acts this way for NULL. Doctext-author: Mike Bayer <mike_mp@zzzcomputing.com> Change-Id: I9227b81f7207b42627a0349d14d40b46aa756cce Pull-request: https://github.com/zzzeek/sqlalchemy/pull/248
* - Added :meth:`.Select.lateral` and related constructs to allowMike Bayer2016-03-291-6/+12
| | | | | for the SQL standard LATERAL keyword, currently only supported by Postgresql. fixes #2857
* - Added support for rendering "FULL OUTER JOIN" to both Core and ORM.Mike Bayer2016-03-281-1/+7
| | | | Pull request courtesy Stefan Urbanek. fixes #1957
* - Fixed bug where the negation of an EXISTS expression would notMike Bayer2016-03-211-1/+0
| | | | | | | be properly typed as boolean in the result, and also would fail to be anonymously aliased in a SELECT list as is the case with a non-negated EXISTS construct. fixes #3682
* - additional adjustment to the fix made in ↵Mike Bayer2016-02-211-1/+4
| | | | | | | | | | | | | | | 8ad968f33100baeb3b13c7e0b724b6b79ab4277f for ref #3657. The Oracle dialect makes more use of the "select_wraps_for" feature than SQL server because Oracle doesn't have "TOP" for a limit-only select, so tests are showing more happening here. In the case where the select() has some dupe columns, these are deduped from the .c collection so a positional match between the wrapper and original can't use .inner_columns, because these collections wont match. Using _columns_plus_names instead which is the deduped collection that determines the SELECT display, which definitely have to match up. (cherry picked from commit aa9ce3f521f254da9879ede011e520ec35b8270e)
* - reworked the way the "select_wraps_for" expression isMike Bayer2016-02-201-7/+3
| | | | | | | | | | | | | | | | | | | | | | | handled within visit_select(); this attribute was added in the 1.0 series to accommodate the subquery wrapping behavior of SQL Server and Oracle while also working with positional column targeting and no longer relying upon "key fallback" in order to target columns in such a statement. The IBM DB2 third-party dialect also has this use case, but its implementation is using regular expressions to rewrite the textual SELECT only and does not make use of a "wrapped" select at this time. The logic no longer attempts to reconcile proxy set collections as this was not deterministic, and instead assumes that the select() and the wrapper select() match their columns postionally, at least for the column positions they have in common, so it is now very simple and safe. fixes #3657. - as a side effect of #3657 it was also revealed that the strategy of calling upon a ResultProxy._getter was not correctly calling into NoSuchColumnError when an expected column was not present, and instead returned None up to loading.instances() to produce NoneType failures; added a raiseerr argument to _getter() which is called when we aren't expecting None, fixes #3658.
* - CTE functionality has been expanded to support all DML, allowingMike Bayer2016-02-111-40/+54
| | | | | | | INSERT, UPDATE, and DELETE statements to both specify their own WITH clause, as well as for these statements themselves to be CTE expressions when they include a RETURNING clause. fixes #2551
* - oracle requires GLOBAL hereMike Bayer2016-02-031-1/+1
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* - add literal_binds for delete() statements in addition to insert()/update()Mike Bayer2016-02-031-1/+1
| | | | | - move tests to CRUDTest - changelog, fixes #3643
* fix passing literal_binds flag through for update and insertpr/232Tim Tate2016-02-021-1/+1
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* - happy new yearMike Bayer2016-01-291-1/+1
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* - The workaround for right-nested joins on SQLite, where they are rewrittenMike Bayer2016-01-261-1/+1
| | | | | | | | | | as subqueries in order to work around SQLite's lack of support for this syntax, is lifted when SQLite version 3.7.16 or greater is detected. fixes #3634 - The workaround for SQLite's unexpected delivery of column names as ``tablename.columnname`` for some kinds of queries is now disabled when SQLite version 3.10.0 or greater is detected. fixes #3633
* - calling str() on a core sql construct has been made more "friendly",Mike Bayer2016-01-191-0/+35
| | | | | | | | | | when the construct contains non-standard sql elements such as returning, array index operations, or dialect-specific or custom datatypes. a string is now returned in these cases rendering an approximation of the construct (typically the postgresql-style version of it) rather than raising an error. fixes #3631 - add within_group to top-level imports - add eq_ignore_whitespace to sqlalchemy.testing imports
* - A deep improvement to the recently added :meth:`.TextClause.columns`Mike Bayer2016-01-141-7/+15
| | | | | | | | | | | | | | | | | | | method, and its interaction with result-row processing, now allows the columns passed to the method to be positionally matched with the result columns in the statement, rather than matching on name alone. The advantage to this includes that when linking a textual SQL statement to an ORM or Core table model, no system of labeling or de-duping of common column names needs to occur, which also means there's no need to worry about how label names match to ORM columns and so-forth. In addition, the :class:`.ResultProxy` has been further enhanced to map column and string keys to a row with greater precision in some cases. fixes #3501 - reorganize the initialization of ResultMetaData for readability and complexity; use the name "cursor_description", define the task of "merging" cursor_description with compiled column information as its own function, and also define "name extraction" as a separate task. - fully change the name we use in the "ambiguous column" error to be the actual name that was ambiguous, modify the C ext also
* - reorganize schema_translate_map to be succinct and gain the performanceMike Bayer2016-01-111-25/+12
| | | | back by using an attrgetter for the default case
* - Multi-tenancy schema translation for :class:`.Table` objects is added.Mike Bayer2016-01-081-23/+68
| | | | | | | | | This supports the use case of an application that uses the same set of :class:`.Table` objects in many schemas, such as schema-per-user. A new execution option :paramref:`.Connection.execution_options.schema_translate_map` is added. fixes #2685 - latest tox doesn't like the {posargs} in the profile rerunner
* - fix docstringsMike Bayer2016-01-081-15/+16
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* - Added :class:`.mysql.JSON` for MySQL 5.7. The JSON type providesMike Bayer2016-01-061-5/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | persistence of JSON values in MySQL as well as basic operator support of "getitem" and "getpath", making use of the ``JSON_EXTRACT`` function in order to refer to individual paths in a JSON structure. fixes #3547 - Added a new type to core :class:`.types.JSON`. This is the base of the PostgreSQL :class:`.postgresql.JSON` type as well as that of the new :class:`.mysql.JSON` type, so that a PG/MySQL-agnostic JSON column may be used. The type features basic index and path searching support. fixes #3619 - reorganization of migration docs etc. to try to refer both to the fixes to JSON that helps Postgresql while at the same time indicating these are new features of the new base JSON type. - a rework of the Array/Indexable system some more, moving things that are specific to Array out of Indexable. - new operators for JSON indexing added to core so that these can be compiled by the PG and MySQL dialects individually - rename sqltypes.Array to sqltypes.ARRAY - as there is no generic Array implementation, this is an uppercase type for now, consistent with the new sqltypes.JSON type that is also not a generic implementation. There may need to be some convention change to handle the case of datatypes that aren't generic, rely upon DB-native implementations, but aren't necessarily all named the same thing.
* - Fixed 1.0 regression where the eager fetch of cursor.rowcount wasMike Bayer2016-01-051-0/+6
| | | | | | | | no longer called for an UPDATE or DELETE statement emitted via plain text or via the :func:`.text` construct, affecting those drivers that erase cursor.rowcount once the cursor is closed such as SQL Server ODBC and Firebird drivers. fixes #3622
* - Fixed bug where CREATE TABLE with a no-column table, but a constraintMike Bayer2015-12-011-1/+1
| | | | | | | such as a CHECK constraint would render an erroneous comma in the definition; this scenario can occur such as with a Postgresql INHERITS table that has no columns of its own. fixes #3598
* - Postgres: Do not prefix table with schema in: "FOR UPDATE of <table>"pr/216Diana Clarke2015-11-241-2/+2
| | | | | | | | | | | | For example, this query: SELECT s1.users.name FROM s1.users FOR UPDATE OF s1.users should actually be: SELECT s1.users.name FROM s1.users FOR UPDATE OF users fixes #3573
* - The system by which a :class:`.Column` considers itself to be anMike Bayer2015-10-071-1/+1
| | | | | | | | | | | | | | | | | "auto increment" column has been changed, such that autoincrement is no longer implicitly enabled for a :class:`.Table` that has a composite primary key. In order to accommodate being able to enable autoincrement for a composite PK member column while at the same time maintaining SQLAlchemy's long standing behavior of enabling implicit autoincrement for a single integer primary key, a third state has been added to the :paramref:`.Column.autoincrement` parameter ``"auto"``, which is now the default. fixes #3216 - The MySQL dialect no longer generates an extra "KEY" directive when generating CREATE TABLE DDL for a table using InnoDB with a composite primary key with AUTO_INCREMENT on a column that isn't the first column; to overcome InnoDB's limitation here, the PRIMARY KEY constraint is now generated with the AUTO_INCREMENT column placed first in the list of columns.
* - The :func:`.type_coerce` construct is now a fully fledged CoreMike Bayer2015-09-161-0/+3
| | | | | | | | | | | expression element which is late-evaluated at compile time. Previously, the function was only a conversion function which would handle different expression inputs by returning either a :class:`.Label` of a column-oriented expression or a copy of a given :class:`.BindParameter` object, which in particular prevented the operation from being logically maintained when an ORM-level expression transformation would convert a column to a bound parameter (e.g. for lazy loading). fixes #3531
* - Added support for "set-aggregate" functions of the formticket_3516Mike Bayer2015-08-261-1/+7
| | | | | | | | | | | ``<function> WITHIN GROUP (ORDER BY <criteria>)``, using the method :class:`.FunctionElement.within_group`. A series of common set-aggregate functions with return types derived from the set have been added. This includes functions like :class:`.percentile_cont`, :class:`.dense_rank` and others. fixes #1370 - make sure we use func.name for all _literal_as_binds in functions.py so we get consistent naming behavior for parameters.
* - build out a new base type for Array, as well as new any/all operatorsMike Bayer2015-08-251-0/+2
| | | | | | - any/all work for Array as well as subqueries, accepted by MySQL - Postgresql ARRAY now subclasses Array - fixes #3516
* - Added new checks for the common error case of passing mapped classesMike Bayer2015-08-221-0/+2
| | | | | | or mapped instances into contexts where they are interpreted as SQL bound parameters; a new exception is raised for this. fixes #3321
* - some cleanups in compiler.pyMike Bayer2015-08-181-50/+32
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* - Fixed regression where :meth:`.ResultProxy.keys` would returnMike Bayer2015-07-191-3/+0
| | | | | | | | un-adjusted internal symbol names for "anonymous" labels, which are the "foo_1" types of labels we see generated for SQL functions without labels and similar. This was a side effect of the performance enhancements implemented as part of references #918. fixes #3483
* add CYCLE support to Sequence() and docstrings for NO MINVALUE and NO MAXVALUEpr/186jakeogh2015-06-271-2/+4
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* add NO MINVALUE and NO MAXVALUE support to Sequence()jakeogh2015-06-271-0/+4
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* add MAXVALUE support to Sequence()jakeogh2015-06-271-0/+2
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* add MINVALUE support to Sequence()jakeogh2015-06-271-0/+2
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* - Added official support for a CTE used by the SELECT presentMike Bayer2015-05-081-1/+15
| | | | | | | | | | | inside of :meth:`.Insert.from_select`. This behavior worked accidentally up until 0.9.9, when it no longer worked due to unrelated changes as part of :ticket:`3248`. Note that this is the rendering of the WITH clause after the INSERT, before the SELECT; the full functionality of CTEs rendered at the top level of INSERT, UPDATE, DELETE is a new feature targeted for a later release. fixes #3418
* - Fixed bug where the truncation of long labels in SQL could produceMike Bayer2015-04-281-1/+1
| | | | | | | | | | a label that overlapped another label that is not truncated; this because the length threshhold for truncation was greater than the portion of the label that remains after truncation. These two values have now been made the same; label_length - 6. The effect here is that shorter column labels will be "truncated" where they would not have been truncated before. fixes #3396
* - Fixed support for "literal_binds" mode when using limit/offsetMike Bayer2015-04-231-2/+2
| | | | | | with Firebird, so that the values are again rendered inline when this is selected. Related to :ticket:`3034`. fixes #3381
* - Fixed issue where a straight SELECT EXISTS query would fail toMike Bayer2015-04-201-4/+17
| | | | | | | | | | | | | | | | assign the proper result type of Boolean to the result mapping, and instead would leak column types from within the query into the result map. This issue exists in 0.9 and earlier as well, however has less of an impact in those versions. In 1.0, due to #918 this becomes a regression in that we now rely upon the result mapping to be very accurate, else we can assign result-type processors to the wrong column. In all versions, this issue also has the effect that a simple EXISTS will not apply the Boolean type handler, leading to simple 1/0 values for backends without native boolean instead of True/False. The fix includes that an EXISTS columns argument will be anon-labeled like other column expressions; a similar fix is implemented for pure-boolean expressions like ``not_(True())``. fixes #3372
* - Fixed bug in new "label resolution" feature of :ticket:`2992` whereMike Bayer2015-03-231-1/+0
| | | | | | | | a label that was anonymous, then labeled again with a name, would fail to be locatable via a textual label. This situation occurs naturally when a mapped :func:`.column_property` is given an explicit label in a query. fixes #3340
* - copyright 2015Mike Bayer2015-03-101-1/+1
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* - rename _select_wrapsMike Bayer2015-03-081-13/+33
| | | | | - replace force_result_map with a mini-API for nested result sets, add coverage
* fooMike Bayer2015-03-081-16/+5
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* - the change for #918 was of course not nearly that simple.Mike Bayer2015-03-071-33/+45
| | | | | | | | | | | | | | | | | | The "wrapping" employed by the mssql and oracle dialects using the "iswrapper" argument was not being used intelligently by the compiler, and the result map was being written incorrectly, using *more* columns in the result map than were actually returned by the statement, due to "row number" columns that are inside the subquery. The compiler now writes out result map on the "top level" select in all cases fully, and for the mssql/oracle wrapping case extracts out the "proxied" columns in a second step, which only includes those columns that are proxied outwards to the top level. This change might have implications for 3rd party dialects that might be imitating oracle's approach. They can safely continue to use the "iswrapper" kw which is now ignored, but they may need to also add the _select_wraps argument as well.
* - The SQL compiler now generates the mapping of expected columnspositional_targetingMike Bayer2015-03-071-13/+29
| | | | | | | | | | | | | | | | | such that they are matched to the received result set positionally, rather than by name. Originally, this was seen as a way to handle cases where we had columns returned with difficult-to-predict names, though in modern use that issue has been overcome by anonymous labeling. In this version, the approach basically reduces function call count per-result by a few dozen calls, or more for larger sets of result columns. The approach still degrades into a modern version of the old approach if textual elements modify the result map, or if any discrepancy in size exists between the compiled set of columns versus what was received, so there's no issue for partially or fully textual compilation scenarios where these lists might not line up. fixes #918 - callcounts still need to be adjusted down for this so zoomark tests won't pass at the moment
* - Literal values within a :class:`.DefaultClause`, which is invokedMike Bayer2015-02-091-1/+2
| | | | | | | when using the :paramref:`.Column.server_default` parameter, will now be rendered using the "inline" compiler, so that they are rendered as-is, rather than as bound parameters. fixes #3087
* - Custom dialects that implement :class:`.GenericTypeCompiler` canMike Bayer2015-01-161-66/+69
| | | | | | | | | | | | | | now be constructed such that the visit methods receive an indication of the owning expression object, if any. Any visit method that accepts keyword arguments (e.g. ``**kw``) will in most cases receive a keyword argument ``type_expression``, referring to the expression object that the type is contained within. For columns in DDL, the dialect's compiler class may need to alter its ``get_column_specification()`` method to support this as well. The ``UserDefinedType.get_col_spec()`` method will also receive ``type_expression`` if it provides ``**kw`` in its argument signature. fixes #3074
* - restate sort_tables in terms of a more fine grainedMike Bayer2015-01-011-4/+25
| | | | | | | | | | | | | sort_tables_and_constraints function. - The DDL generation system of :meth:`.MetaData.create_all` and :meth:`.Metadata.drop_all` has been enhanced to in most cases automatically handle the case of mutually dependent foreign key constraints; the need for the :paramref:`.ForeignKeyConstraint.use_alter` flag is greatly reduced. The system also works for constraints which aren't given a name up front; only in the case of DROP is a name required for at least one of the constraints involved in the cycle. fixes #3282
* - Added support for CTEs under Oracle. This includes some tweaksMike Bayer2014-12-041-3/+14
| | | | | | | to the aliasing syntax, as well as a new CTE feature :meth:`.CTE.suffix_with`, which is useful for adding in special Oracle-specific directives to the CTE. fixes #3220
* - The :meth:`.Operators.match` operator is now handled such that theMike Bayer2014-12-041-2/+7
| | | | | | | | | | | | | | | | return type is not strictly assumed to be boolean; it now returns a :class:`.Boolean` subclass called :class:`.MatchType`. The type will still produce boolean behavior when used in Python expressions, however the dialect can override its behavior at result time. In the case of MySQL, while the MATCH operator is typically used in a boolean context within an expression, if one actually queries for the value of a match expression, a floating point value is returned; this value is not compatible with SQLAlchemy's C-based boolean processor, so MySQL's result-set behavior now follows that of the :class:`.Float` type. A new operator object ``notmatch_op`` is also added to better allow dialects to define the negation of a match operation. fixes #3263
* - The behavioral contract of the :attr:`.ForeignKeyConstraint.columns`Mike Bayer2014-11-251-3/+3
| | | | | | | | collection has been made consistent; this attribute is now a :class:`.ColumnCollection` like that of all other constraints and is initialized at the point when the constraint is associated with a :class:`.Table`. fixes #3243
* - Fixed issue where the columns from a SELECT embedded in anMike Bayer2014-11-111-0/+8
| | | | | | | | | INSERT, either through the values clause or as a "from select", would pollute the column types used in the result set produced by the RETURNING clause when columns from both statements shared the same name, leading to potential errors or mis-adaptation when retrieving the returning rows. fixes #3248
* - ensure kwargs are passed for limit clause on a compound select as well,Mike Bayer2014-10-311-1/+1
| | | | further fixes for #3034
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