class match(Generative, elements.BinaryExpression):
Produce a MATCH (X, Y) AGAINST ('TEXT') clause.
E.g.:
from sqlalchemy import desc from sqlalchemy.dialects.mysql import match match_expr = match( users_table.c.firstname, users_table.c.lastname, against="Firstname Lastname", ) stmt = ( select(users_table) .where(match_expr.in_boolean_mode()) .order_by(desc(match_expr)) )
Would produce SQL resembling:
SELECT id, firstname, lastname FROM user WHERE MATCH(firstname, lastname) AGAINST (:param_1 IN BOOLEAN MODE) ORDER BY MATCH(firstname, lastname) AGAINST (:param_2) DESC
The _mysql.match
function is a standalone version of the
_sql.ColumnElement.match
method available on all
SQL expressions, as when _expression.ColumnElement.match
is
used, but allows to pass multiple columns
See Also
_expression.ColumnElement.match
Parameters | |
*cols | column expressions to match against |
against | expression to be compared towards |
in_boolean_mode | boolean, set "boolean mode" to true |
in_natural_language_mode | boolean , set "natural language" to true |
with_query_expansion | boolean, set "query expansion" to true |
Method | in_boolean_mode |
Apply the "IN BOOLEAN MODE" modifier to the MATCH expression. |
Method | in_natural_language_mode |
Apply the "IN NATURAL LANGUAGE MODE" modifier to the MATCH expression. |
Method | with_query_expansion |
Apply the "WITH QUERY EXPANSION" modifier to the MATCH expression. |
Method | __init__ |
Undocumented |
Class Variable | __visit_name__ |
Undocumented |
Class Variable | inherit_cache |
Indicate if this .HasCacheKey instance should make use of the cache key generation scheme used by its immediate superclass. |
Instance Variable | modifiers |
Undocumented |
Inherited from Generative
:
Method | _generate |
Undocumented |
Inherited from BinaryExpression
:
Method | __bool__ |
Undocumented |
Method | _negate |
Undocumented |
Method | self_group |
Apply a 'grouping' to this _expression.ClauseElement . |
Class Variable | _traverse_internals |
Undocumented |
Instance Variable | _is_implicitly_boolean |
Indicates that any database will know this is a boolean expression even if the database does not have an explicit boolean datatype. |
Instance Variable | _orig |
Undocumented |
Instance Variable | _propagate_attrs |
like annotations, however these propagate outwards liberally as SQL constructs are built, and are set up at construction time. |
Instance Variable | left |
Undocumented |
Instance Variable | negate |
Undocumented |
Instance Variable | operator |
Undocumented |
Instance Variable | right |
Undocumented |
Instance Variable | type |
Undocumented |
Property | _from_objects |
Undocumented |
Property | is_comparison |
Undocumented |
Inherited from ColumnElement
(via BinaryExpression
):
Method | cast |
Produce a type cast, i.e. CAST(<expression> AS <type>). |
Method | label |
Produce a column label, i.e. <columnname> AS <name>. |
Method | operate |
Operate on an argument. |
Method | reverse_operate |
Reverse operate on an argument. |
Method | shares_lineage |
Return True if the given _expression.ColumnElement has a common ancestor to this _expression.ColumnElement . |
Class Variable | foreign_keys |
Undocumented |
Class Variable | key |
The 'key' that in some circumstances refers to this object in a Python namespace. |
Class Variable | primary_key |
Undocumented |
Method | __getattr__ |
Undocumented |
Method | _anon_label |
Undocumented |
Method | _bind_param |
Undocumented |
Method | _compare_name_for_result |
Return True if the given column element compares to this one when targeting within a result row. |
Method | _dedupe_anon_label_idx |
label to apply to a column that is anon labeled, but repeated in the SELECT, so that we have to make an "extra anon" label that disambiguates it from the previous appearance. |
Method | _dedupe_anon_tq_label_idx |
Undocumented |
Method | _expression_label |
a suggested label to use in the case that the column has no name, which should be used if possible as the explicit 'AS <label>' where this expression would normally have an anon label. |
Method | _make_proxy |
Create a new _expression.ColumnElement representing this _expression.ColumnElement as it appears in the select list of a descending selectable. |
Method | _proxy_key |
Undocumented |
Method | _tq_key_label |
A label-based version of 'key' that in some circumstances refers to this object in a Python namespace. |
Method | _uncached_proxy_set |
An 'uncached' version of proxy set. |
Method | comparator |
Undocumented |
Class Variable | _allow_label_resolve |
A flag that can be flipped to prevent a column from being resolvable by string label name. |
Class Variable | _alt_names |
Undocumented |
Class Variable | _proxies |
Undocumented |
Class Variable | _render_label_in_columns_clause |
No summary |
Class Variable | _tq_label |
The named label that can be used to target this column in a result set in a "table qualified" context. |
Property | _anon_key_label |
Provides a constant 'anonymous key label' for this ColumnElement. |
Property | _anon_name_label |
Provides a constant 'anonymous label' for this ColumnElement. |
Property | _anon_tq_key_label |
Undocumented |
Property | _anon_tq_label |
Undocumented |
Property | _key_label |
legacy; renamed to _tq_key_label |
Property | _label |
legacy; renamed to _tq_label |
Property | _non_anon_label |
the 'name' that naturally applies this element when rendered in SQL. |
Property | _select_iterable |
Undocumented |
Property | anon_key_label |
Undocumented |
Property | anon_label |
Undocumented |
Property | base_columns |
Undocumented |
Property | expression |
Return a column expression. |
Property | proxy_set |
Undocumented |
Inherited from ColumnArgumentOrKeyRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, ColumnArgumentOrKeyRole
, ColumnArgumentRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from StatementOptionRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, StatementOptionRole
, StructuralRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from WhereHavingRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from AllowsLambdaRole
(via BinaryExpression
, ColumnElement
, WhereHavingRole
, OnClauseRole
):
Class Variable | allows_lambda |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, WhereHavingRole
, OnClauseRole
, StructuralRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from BinaryElementRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, BinaryElementRole
, ExpressionElementRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from OrderByRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from AllowsLambdaRole
(via BinaryExpression
, ColumnElement
, OrderByRole
):
Class Variable | allows_lambda |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, OrderByRole
, ByOfRole
, ColumnListRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from ColumnsClauseRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from AllowsLambdaRole
(via BinaryExpression
, ColumnElement
, ColumnsClauseRole
):
Class Variable | allows_lambda |
Undocumented |
Inherited from UsesInspection
(via BinaryExpression
, ColumnElement
, ColumnsClauseRole
):
Class Variable | _post_inspect |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, ColumnsClauseRole
, ColumnListRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from LimitOffsetRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, LimitOffsetRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from DMLColumnRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, DMLColumnRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from DDLConstraintColumnRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, DDLConstraintColumnRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from DDLExpressionRole
(via BinaryExpression
, ColumnElement
):
Class Variable | _role_name |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, DDLExpressionRole
, StructuralRole
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from ColumnOperators
(via BinaryExpression
, ColumnElement
):
Method | __add__ |
Implement the + operator. |
Method | __contains__ |
Undocumented |
Method | __div__ |
Implement the / operator. |
Method | __eq__ |
Implement the == operator. |
Method | __ge__ |
Implement the >= operator. |
Method | __getitem__ |
Implement the [] operator. |
Method | __gt__ |
Implement the > operator. |
Method | __le__ |
Implement the <= operator. |
Method | __lshift__ |
implement the << operator. |
Method | __lt__ |
Implement the < operator. |
Method | __mod__ |
Implement the % operator. |
Method | __mul__ |
Implement the * operator. |
Method | __ne__ |
Implement the != operator. |
Method | __neg__ |
Implement the - operator. |
Method | __radd__ |
Implement the + operator in reverse. |
Method | __rdiv__ |
Implement the / operator in reverse. |
Method | __rmod__ |
Implement the % operator in reverse. |
Method | __rmul__ |
Implement the * operator in reverse. |
Method | __rshift__ |
implement the >> operator. |
Method | __rsub__ |
Implement the - operator in reverse. |
Method | __rtruediv__ |
Implement the // operator in reverse. |
Method | __sub__ |
Implement the - operator. |
Method | __truediv__ |
Implement the // operator. |
Method | all_ |
Produce an _expression.all_ clause against the parent object. |
Method | any_ |
Produce an _expression.any_ clause against the parent object. |
Method | asc |
Produce a _expression.asc clause against the parent object. |
Method | between |
Produce a _expression.between clause against the parent object, given the lower and upper range. |
Method | collate |
Produce a _expression.collate clause against the parent object, given the collation string. |
Method | concat |
Implement the 'concat' operator. |
Method | contains |
Implement the 'contains' operator. |
Method | desc |
Produce a _expression.desc clause against the parent object. |
Method | distinct |
Produce a _expression.distinct clause against the parent object. |
Method | endswith |
Implement the 'endswith' operator. |
Method | ilike |
Implement the ilike operator, e.g. case insensitive LIKE. |
Method | in_ |
Implement the in operator. |
Method | is_ |
Implement the IS operator. |
Method | is_distinct_from |
Implement the IS DISTINCT FROM operator. |
Method | is_not |
Implement the IS NOT operator. |
Method | is_not_distinct_from |
Implement the IS NOT DISTINCT FROM operator. |
Method | like |
Implement the like operator. |
Method | match |
Implements a database-specific 'match' operator. |
Method | not_ilike |
implement the NOT ILIKE operator. |
Method | not_in |
implement the NOT IN operator. |
Method | not_like |
implement the NOT LIKE operator. |
Method | nulls_first |
Produce a _expression.nulls_first clause against the parent object. |
Method | nulls_last |
Produce a _expression.nulls_last clause against the parent object. |
Method | regexp_match |
Implements a database-specific 'regexp match' operator. |
Method | regexp_replace |
Implements a database-specific 'regexp replace' operator. |
Method | startswith |
Implement the startswith operator. |
Class Variable | __slots__ |
Undocumented |
Class Variable | timetuple |
Hack, allows datetime objects to be compared on the LHS. |
Inherited from Operators
(via BinaryExpression
, ColumnElement
, ColumnOperators
):
Method | __and__ |
Implement the & operator. |
Method | __invert__ |
Implement the ~ operator. |
Method | __or__ |
Implement the | operator. |
Method | bool_op |
Return a custom boolean operator. |
Method | op |
Produce a generic operator function. |
Inherited from ClauseElement
(via BinaryExpression
, ColumnElement
):
Method | compare |
Compare this _expression.ClauseElement to the given _expression.ClauseElement . |
Method | compile |
Compile this SQL expression. |
Method | params |
Return a copy with _expression.bindparam elements replaced. |
Method | unique_params |
Return a copy with _expression.bindparam elements replaced. |
Method | __getstate__ |
Undocumented |
Method | __invert__ |
Undocumented |
Method | __repr__ |
Undocumented |
Method | __str__ |
Undocumented |
Method | _clone |
Create a shallow copy of this ClauseElement. |
Method | _cloned_set |
Return the set consisting all cloned ancestors of this ClauseElement. |
Method | _compile_w_cache |
Undocumented |
Method | _compiler |
Return a compiler appropriate for this ClauseElement, given a Dialect. |
Method | _execute_on_connection |
Undocumented |
Method | _negate_in_binary |
a hook to allow the right side of a binary expression to respond to a negation of the binary expression. |
Method | _replace_params |
Undocumented |
Method | _set_propagate_attrs |
Undocumented |
Method | _ungroup |
Return this _expression.ClauseElement without any groupings. |
Method | _with_binary_element_type |
in the context of binary expression, convert the type of this object to the one given. |
Class Variable | _cache_key_traversal |
Undocumented |
Class Variable | _is_bind_parameter |
Undocumented |
Class Variable | _is_clause_list |
Undocumented |
Class Variable | _is_clone_of |
Undocumented |
Class Variable | _is_from_clause |
Undocumented |
Class Variable | _is_from_container |
Undocumented |
Class Variable | _is_immutable |
Undocumented |
Class Variable | _is_lambda_element |
Undocumented |
Class Variable | _is_returns_rows |
Undocumented |
Class Variable | _is_select_container |
Undocumented |
Class Variable | _is_select_statement |
Undocumented |
Class Variable | _is_singleton_constant |
Undocumented |
Class Variable | _is_text_clause |
Undocumented |
Class Variable | _is_textual |
Undocumented |
Class Variable | _order_by_label_element |
Undocumented |
Class Variable | bind |
Undocumented |
Class Variable | description |
Undocumented |
Class Variable | is_clause_element |
Undocumented |
Class Variable | is_selectable |
Undocumented |
Class Variable | stringify_dialect |
Undocumented |
Class Variable | supports_execution |
Undocumented |
Property | _constructor |
return the 'constructor' for this ClauseElement. |
Property | entity_namespace |
Undocumented |
Inherited from SQLRole
(via BinaryExpression
, ColumnElement
, ClauseElement
):
Class Variable | allows_lambda |
Undocumented |
Class Variable | uses_inspection |
Undocumented |
Inherited from SupportsWrappingAnnotations
(via BinaryExpression
, ColumnElement
, ClauseElement
):
Method | _annotate |
return a copy of this ClauseElement with annotations updated by the given dictionary. |
Method | _deannotate |
return a copy of this _expression.ClauseElement with annotations removed. |
Method | _with_annotations |
return a copy of this ClauseElement with annotations replaced by the given dictionary. |
Inherited from SupportsAnnotations
(via BinaryExpression
, ColumnElement
, ClauseElement
, SupportsWrappingAnnotations
):
Property | _annotations_cache_key |
Undocumented |
Inherited from MemoizedHasCacheKey
(via BinaryExpression
, ColumnElement
, ClauseElement
):
Method | _generate_cache_key |
return a cache key. |
Inherited from HasCacheKey
(via BinaryExpression
, ColumnElement
, ClauseElement
, MemoizedHasCacheKey
):
Class Method | _generate_cache_attrs |
generate cache key dispatcher for a new class. |
Class Method | _generate_cache_key_for_object |
Undocumented |
Method | _gen_cache_key |
return an optional cache key. |
Class Variable | __slots__ |
Undocumented |
Class Variable | _hierarchy_supports_caching |
private attribute which may be set to False to prevent the inherit_cache warning from being emitted for a hierarchy of subclasses. |
Class Variable | _is_has_cache_key |
Undocumented |
Inherited from HasCopyInternals
(via BinaryExpression
, ColumnElement
, ClauseElement
):
Method | _copy_internals |
Reassign internal elements to be clones of themselves. |
Inherited from Traversible
(via BinaryExpression
, ColumnElement
, ClauseElement
):
Method | get_children |
Return immediate child .visitors.Traversible elements of this .visitors.Traversible . |
Method | __class_getitem__ |
Undocumented |
Returns | |
a new _mysql.match instance with modifications
applied. |
Returns | |
a new _mysql.match instance with modifications
applied. |
Returns | |
a new _mysql.match instance with modifications
applied. |
bool
=
Indicate if this .HasCacheKey
instance should make use of the
cache key generation scheme used by its immediate superclass.
The attribute defaults to None, which indicates that a construct has not yet taken into account whether or not its appropriate for it to participate in caching; this is functionally equivalent to setting the value to False, except that a warning is also emitted.
This flag can be set to True on a particular class, if the SQL that corresponds to the object does not change based on attributes which are local to this class, and not its superclass.
See Also
:ref:`compilerext_caching` - General guideslines for setting the
.HasCacheKey.inherit_cache
attribute for third-party or user
defined SQL constructs.