Query

Query classes in RedisVL provide a structured way to define simple or complex queries for different use cases. Each query class wraps the redis-py Query module https://github.com/redis/redis-py/blob/master/redis/commands/search/query.py with extended functionality for ease-of-use.

VectorQuery

class VectorQuery(vector, vector_field_name, return_fields=None, filter_expression=None, dtype='float32', num_results=10, return_score=True, dialect=2, sort_by=None, in_order=False, hybrid_policy=None, batch_size=None, ef_runtime=None, epsilon=None, search_window_size=None, use_search_history=None, search_buffer_capacity=None, normalize_vector_distance=False)

Bases: BaseVectorQuery, BaseQuery

A query for running a vector search along with an optional filter expression.

• Parameters:
  • vector (List [ float ]) – The vector to perform the vector search with.
  • vector_field_name (str) – The name of the vector field to search against in the database.
  • return_fields (List [ str ]) – The declared fields to return with search results.
  • filter_expression (Union [ str , FilterExpression ] , optional) – A filter to apply along with the vector search. Defaults to None.
  • dtype (str , optional) – The dtype of the vector. Defaults to "float32".
  • num_results (int , optional) – The top k results to return from the vector search. Defaults to 10.
  • return_score (bool , optional) – Whether to return the vector distance. Defaults to True.
  • dialect (int , optional) – The RediSearch query dialect. Defaults to 2.
  • sort_by (Optional [ SortSpec ]) – The field(s) to order the results by. Can be:
    • str: single field name
    • Tuple[str, str]: (field_name, "ASC"|"DESC")
    • List: list of fields or tuples Note: Only the first field is used for Redis sorting. Defaults to None. Results will be ordered by vector distance.
  • in_order (bool) – Requires the terms in the field to have the same order as the terms in the query filter, regardless of the offsets between them. Defaults to False.
  • hybrid_policy (Optional [ str ]) – Controls how filters are applied during vector search. Options are "BATCHES" (paginates through small batches of nearest neighbors) or "ADHOC_BF" (computes scores for all vectors passing the filter). "BATCHES" mode is typically faster for queries with selective filters. "ADHOC_BF" mode is better when filters match a large portion of the dataset. Defaults to None, which lets Redis auto-select the optimal policy.
  • batch_size (Optional [ int ]) – When hybrid_policy is "BATCHES", controls the number of vectors to fetch in each batch. Larger values may improve performance at the cost of memory usage. Only applies when hybrid_policy="BATCHES". Defaults to None, which lets Redis auto-select an appropriate batch size.
  • ef_runtime (Optional [ int ]) – Controls the size of the dynamic candidate list for HNSW algorithm at query time. Higher values improve recall at the expense of slower search performance. Defaults to None, which uses the index-defined value.
  • epsilon (Optional [ float ]) – The range search approximation factor for HNSW and SVS-VAMANA indexes. Sets boundaries for candidates within radius * (1 + epsilon). Higher values allow more extensive search and more accurate results at the expense of run time. Defaults to None, which uses the index-defined value (typically 0.01).
  • search_window_size (Optional [ int ]) – The size of the search window for SVS-VAMANA KNN searches. Increasing this value generally yields more accurate but slower search results. Defaults to None, which uses the index-defined value (typically 10).
  • use_search_history (Optional [ str ]) – For SVS-VAMANA indexes, controls whether to use the search buffer or entire search history. Options are "OFF", "ON", or "AUTO". "AUTO" is always evaluated internally as "ON". Using the entire history may yield a slightly better graph at the cost of more search time. Defaults to None, which uses the index-defined value (typically "AUTO").
  • search_buffer_capacity (Optional [ int ]) – Tuning parameter for SVS-VAMANA indexes using two-level compression (LVQx or LeanVec types). Determines the number of vector candidates to collect in the first level of search before the re-ranking level. Defaults to None, which uses the index-defined value (typically SEARCH_WINDOW_SIZE).
  • normalize_vector_distance (bool) – Redis supports 3 distance metrics: L2 (euclidean), IP (inner product), and COSINE. By default, L2 distance returns an unbounded value. COSINE distance returns a value between 0 and 2. IP returns a value determined by the magnitude of the vector. Setting this flag to true converts COSINE and L2 distance to a similarity score between 0 and 1. Note: setting this flag to true for IP will throw a warning since by definition COSINE similarity is normalized IP.
• Raises: TypeError – If filter_expression is not of type redisvl.query.FilterExpression

NOTE

Learn more about vector queries in Redis: https://redis.io/docs/latest/develop/ai/search-and-query/vectors/#knn-vector-search

dialect(dialect)

Add a dialect field to the query.

• dialect - dialect version to execute the query under

• Parameters: dialect (int)
• Return type: Query

expander(expander)

Add a expander field to the query.

• expander - the name of the expander

• Parameters: expander (str)
• Return type: Query

in_order()

Match only documents where the query terms appear in the same order in the document. i.e. for the query "hello world", we do not match "world hello"

• Return type: Query

language(language)

Analyze the query as being in the specified language.

• Parameters: language (str) – The language (e.g. chinese or english)
• Return type: Query

limit_fields(*fields)

Limit the search to specific TEXT fields only.

• fields: A list of strings, case sensitive field names

from the defined schema.

• Parameters: fields (List [ str ])
• Return type: Query

limit_ids(*ids)

Limit the results to a specific set of pre-known document ids of any length.

• Return type: Query

no_content()

Set the query to only return ids and not the document content.

• Return type: Query

no_stopwords()

Prevent the query from being filtered for stopwords. Only useful in very big queries that you are certain contain no stopwords.

• Return type: Query

paging(offset, num)

Set the paging for the query (defaults to 0..10).

• offset: Paging offset for the results. Defaults to 0
• num: How many results do we want

• Parameters:
  • offset (int)
  • num (int)
• Return type: Query

query_string()

Return the query string of this query only.

• Return type: str

return_fields(*fields, skip_decode=None)

Set the fields to return with search results.

• Parameters:
  • *fields – Variable number of field names to return.
  • skip_decode (str | List [ str ] | None) – Optional field name or list of field names that should not be decoded. Useful for binary data like embeddings.
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises: TypeError – If skip_decode is not a string, list, or None.

scorer(scorer)

Use a different scoring function to evaluate document relevance. Default is TFIDF.

Since Redis 8.0 default was changed to BM25STD.

• Parameters: scorer (str) – The scoring function to use (e.g. TFIDF.DOCNORM or BM25)
• Return type: Query

set_batch_size(batch_size)

Set the batch size for the query.

• Parameters: batch_size (int) – The batch size to use when hybrid_policy is "BATCHES".
• Raises:
  • TypeError – If batch_size is not an integer
  • ValueError – If batch_size is not positive

set_ef_runtime(ef_runtime)

Set the EF_RUNTIME parameter for the query.

• Parameters: ef_runtime (int) – The EF_RUNTIME value to use for HNSW algorithm. Higher values improve recall at the expense of slower search.
• Raises:
  • TypeError – If ef_runtime is not an integer
  • ValueError – If ef_runtime is not positive

set_epsilon(epsilon)

Set the epsilon parameter for the query.

• Parameters: epsilon (float) – The range search approximation factor for HNSW and SVS-VAMANA indexes. Sets boundaries for candidates within radius * (1 + epsilon). Higher values allow more extensive search and more accurate results at the expense of run time.
• Raises:
  • TypeError – If epsilon is not a float or int
  • ValueError – If epsilon is negative

set_filter(filter_expression=None)

Set the filter expression for the query.

• Parameters: filter_expression (Optional [ Union [ str , FilterExpression ] ] , optional) – The filter expression or query string to use on the query.
• Raises: TypeError – If filter_expression is not a valid FilterExpression or string.

set_hybrid_policy(hybrid_policy)

Set the hybrid policy for the query.

• Parameters: hybrid_policy (str) – The hybrid policy to use. Options are "BATCHES" or "ADHOC_BF".
• Raises: ValueError – If hybrid_policy is not one of the valid options

set_search_buffer_capacity(search_buffer_capacity)

Set the SEARCH_BUFFER_CAPACITY parameter for the query.

• Parameters: search_buffer_capacity (int) – Tuning parameter for SVS-VAMANA indexes using two-level compression. Determines the number of vector candidates to collect in the first level of search before the re-ranking level.
• Raises:
  • TypeError – If search_buffer_capacity is not an integer
  • ValueError – If search_buffer_capacity is not positive

set_search_window_size(search_window_size)

Set the SEARCH_WINDOW_SIZE parameter for the query.

• Parameters: search_window_size (int) – The size of the search window for SVS-VAMANA KNN searches. Increasing this value generally yields more accurate but slower search results.
• Raises:
  • TypeError – If search_window_size is not an integer
  • ValueError – If search_window_size is not positive

set_use_search_history(use_search_history)

Set the USE_SEARCH_HISTORY parameter for the query.

• Parameters: use_search_history (str) – For SVS-VAMANA indexes, controls whether to use the search buffer or entire search history. Options are "OFF", "ON", or "AUTO".
• Raises:
  • TypeError – If use_search_history is not a string
  • ValueError – If use_search_history is not one of "OFF", "ON", or "AUTO"

slop(slop)

Allow a maximum of N intervening non matched terms between phrase terms (0 means exact phrase).

• Parameters: slop (int)
• Return type: Query

sort_by(sort_spec=None, asc=True)

Set the sort order for query results.

This method supports sorting by single or multiple fields. Note that Redis Search natively supports only a single SORTBY field. When multiple fields are specified, only the FIRST field is used for the Redis SORTBY clause.

• Parameters:
  • sort_spec (str | Tuple [ str , str ] | List [ str | Tuple [ str , str ] ] | None) – Sort specification in various formats:
    • str: single field name
    • Tuple[str, str]: (field_name, "ASC"|"DESC")
    • List: list of field names or tuples
  • asc (bool) – Default sort direction when not specified (only used when sort_spec is a string). Defaults to True (ascending).
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises:
  • TypeError – If sort_spec is not a valid type.
  • ValueError – If direction is not "ASC" or "DESC".

Examples

>> query.sort_by("price")  # Single field, ascending
>> query.sort_by(("price", "DESC"))  # Single field, descending
>> query.sort_by(["price", "rating"])  # Multiple fields (only first used)
>> query.sort_by([("price", "DESC"), ("rating", "ASC")])

NOTE

When multiple fields are specified, only the first field is used for sorting in Redis. Future versions may support multi-field sorting through post-query sorting in Python.

timeout(timeout)

overrides the timeout parameter of the module

• Parameters: timeout (float)
• Return type: Query

verbatim()

Set the query to be verbatim, i.e. use no query expansion or stemming.

• Return type: Query

with_payloads()

Ask the engine to return document payloads.

• Return type: Query

with_scores()

Ask the engine to return document search scores.

• Return type: Query

property batch_size: int | None

Return the batch size for the query.

• Returns: The batch size for the query.
• Return type: Optional[int]

property ef_runtime: int | None

Return the EF_RUNTIME parameter for the query.

• Returns: The EF_RUNTIME value for the query.
• Return type: Optional[int]

property epsilon: float | None

Return the epsilon parameter for the query.

• Returns: The epsilon value for the query.
• Return type: Optional[float]

property filter: str | FilterExpression

The filter expression for the query.

property hybrid_policy: str | None

Return the hybrid policy for the query.

• Returns: The hybrid policy for the query.
• Return type: Optional[str]

property params: Dict[str, Any]

Return the parameters for the query.

• Returns: The parameters for the query.
• Return type: Dict[str, Any]

property query: BaseQuery

Return self as the query object.

property search_buffer_capacity: int | None

Return the SEARCH_BUFFER_CAPACITY parameter for the query.

• Returns: The SEARCH_BUFFER_CAPACITY value for the query.
• Return type: Optional[int]

property search_window_size: int | None

Return the SEARCH_WINDOW_SIZE parameter for the query.

• Returns: The SEARCH_WINDOW_SIZE value for the query.
• Return type: Optional[int]

property use_search_history: str | None

Return the USE_SEARCH_HISTORY parameter for the query.

• Returns: The USE_SEARCH_HISTORY value for the query.
• Return type: Optional[str]

NOTE

Runtime Parameters for Performance Tuning

VectorQuery supports runtime parameters for HNSW and SVS-VAMANA indexes that can be adjusted at query time without rebuilding the index:

HNSW Parameters:

• ef_runtime: Controls search accuracy (higher = better recall, slower search)

SVS-VAMANA Parameters:

• search_window_size: Size of search window for KNN searches
• use_search_history: Whether to use search buffer (OFF/ON/AUTO)
• search_buffer_capacity: Tuning parameter for 2-level compression

Example with HNSW runtime parameters:

from redisvl.query import VectorQuery

query = VectorQuery(
    vector=[0.1, 0.2, 0.3],
    vector_field_name="embedding",
    num_results=10,
    ef_runtime=150  # Higher for better recall
)

Example with SVS-VAMANA runtime parameters:

query = VectorQuery(
    vector=[0.1, 0.2, 0.3],
    vector_field_name="embedding",
    num_results=10,
    search_window_size=20,
    use_search_history='ON',
    search_buffer_capacity=30
)

VectorRangeQuery

class VectorRangeQuery(vector, vector_field_name, return_fields=None, filter_expression=None, dtype='float32', distance_threshold=0.2, epsilon=None, search_window_size=None, use_search_history=None, search_buffer_capacity=None, num_results=10, return_score=True, dialect=2, sort_by=None, in_order=False, hybrid_policy=None, batch_size=None, normalize_vector_distance=False)

Bases: BaseVectorQuery, BaseQuery

A query for running a filtered vector search based on semantic distance threshold.

• Parameters:
  • vector (List [ float ]) – The vector to perform the range query with.
  • vector_field_name (str) – The name of the vector field to search against in the database.
  • return_fields (List [ str ]) – The declared fields to return with search results.
  • filter_expression (Union [ str , FilterExpression ] , optional) – A filter to apply along with the range query. Defaults to None.
  • dtype (str , optional) – The dtype of the vector. Defaults to "float32".
  • distance_threshold (float) – The threshold for vector distance. A smaller threshold indicates a stricter semantic search. Defaults to 0.2.
  • epsilon (Optional [ float ]) – The relative factor for vector range queries, setting boundaries for candidates within radius * (1 + epsilon). This controls how extensive the search is beyond the specified radius. Higher values increase recall at the expense of performance. Defaults to None, which uses the index-defined epsilon (typically 0.01).
  • search_window_size (Optional [ int ]) – The size of the search window for SVS-VAMANA range searches. Increasing this value generally yields more accurate but slower search results. Defaults to None, which uses the index-defined value (typically 10).
  • use_search_history (Optional [ str ]) – For SVS-VAMANA indexes, controls whether to use the search buffer or entire search history. Options are "OFF", "ON", or "AUTO". "AUTO" is always evaluated internally as "ON". Using the entire history may yield a slightly better graph at the cost of more search time. Defaults to None, which uses the index-defined value (typically "AUTO").
  • search_buffer_capacity (Optional [ int ]) – Tuning parameter for SVS-VAMANA indexes using two-level compression (LVQx or LeanVec types). Determines the number of vector candidates to collect in the first level of search before the re-ranking level. Defaults to None, which uses the index-defined value (typically SEARCH_WINDOW_SIZE).
  • num_results (int) – The MAX number of results to return. Defaults to 10.
  • return_score (bool , optional) – Whether to return the vector distance. Defaults to True.
  • dialect (int , optional) – The RediSearch query dialect. Defaults to 2.
  • sort_by (Optional [ SortSpec ]) – The field(s) to order the results by. Can be:
    • str: single field name
    • Tuple[str, str]: (field_name, "ASC"|"DESC")
    • List: list of fields or tuples Note: Only the first field is used for Redis sorting. Defaults to None. Results will be ordered by vector distance.
  • in_order (bool) – Requires the terms in the field to have the same order as the terms in the query filter, regardless of the offsets between them. Defaults to False.
  • hybrid_policy (Optional [ str ]) – Controls how filters are applied during vector search. Options are "BATCHES" (paginates through small batches of nearest neighbors) or "ADHOC_BF" (computes scores for all vectors passing the filter). "BATCHES" mode is typically faster for queries with selective filters. "ADHOC_BF" mode is better when filters match a large portion of the dataset. Defaults to None, which lets Redis auto-select the optimal policy.
  • batch_size (Optional [ int ]) – When hybrid_policy is "BATCHES", controls the number of vectors to fetch in each batch. Larger values may improve performance at the cost of memory usage. Only applies when hybrid_policy="BATCHES". Defaults to None, which lets Redis auto-select an appropriate batch size.
  • normalize_vector_distance (bool) – Redis supports 3 distance metrics: L2 (euclidean), IP (inner product), and COSINE. By default, L2 distance returns an unbounded value. COSINE distance returns a value between 0 and 2. IP returns a value determined by the magnitude of the vector. Setting this flag to true converts COSINE and L2 distance to a similarity score between 0 and 1. Note: setting this flag to true for IP will throw a warning since by definition COSINE similarity is normalized IP.
• Raises: TypeError – If filter_expression is not of type redisvl.query.FilterExpression

NOTE

Learn more about vector range queries: https://redis.io/docs/interact/search-and-query/search/vectors/#range-query

dialect(dialect)

Add a dialect field to the query.

• dialect - dialect version to execute the query under

• Parameters: dialect (int)
• Return type: Query

expander(expander)

Add a expander field to the query.

• expander - the name of the expander

• Parameters: expander (str)
• Return type: Query

in_order()

Match only documents where the query terms appear in the same order in the document. i.e. for the query "hello world", we do not match "world hello"

• Return type: Query

language(language)

Analyze the query as being in the specified language.

• Parameters: language (str) – The language (e.g. chinese or english)
• Return type: Query

limit_fields(*fields)

Limit the search to specific TEXT fields only.

• fields: A list of strings, case sensitive field names

from the defined schema.

• Parameters: fields (List [ str ])
• Return type: Query

limit_ids(*ids)

Limit the results to a specific set of pre-known document ids of any length.

• Return type: Query

no_content()

Set the query to only return ids and not the document content.

• Return type: Query

no_stopwords()

Prevent the query from being filtered for stopwords. Only useful in very big queries that you are certain contain no stopwords.

• Return type: Query

paging(offset, num)

Set the paging for the query (defaults to 0..10).

• offset: Paging offset for the results. Defaults to 0
• num: How many results do we want

• Parameters:
  • offset (int)
  • num (int)
• Return type: Query

query_string()

Return the query string of this query only.

• Return type: str

return_fields(*fields, skip_decode=None)

Set the fields to return with search results.

• Parameters:
  • *fields – Variable number of field names to return.
  • skip_decode (str | List [ str ] | None) – Optional field name or list of field names that should not be decoded. Useful for binary data like embeddings.
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises: TypeError – If skip_decode is not a string, list, or None.

scorer(scorer)

Use a different scoring function to evaluate document relevance. Default is TFIDF.

Since Redis 8.0 default was changed to BM25STD.

• Parameters: scorer (str) – The scoring function to use (e.g. TFIDF.DOCNORM or BM25)
• Return type: Query

set_batch_size(batch_size)

Set the batch size for the query.

• Parameters: batch_size (int) – The batch size to use when hybrid_policy is "BATCHES".
• Raises:
  • TypeError – If batch_size is not an integer
  • ValueError – If batch_size is not positive

set_distance_threshold(distance_threshold)

Set the distance threshold for the query.

• Parameters: distance_threshold (float) – Vector distance threshold.
• Raises:
  • TypeError – If distance_threshold is not a float or int
  • ValueError – If distance_threshold is negative

set_epsilon(epsilon)

Set the epsilon parameter for the range query.

• Parameters: epsilon (float) – The relative factor for vector range queries, setting boundaries for candidates within radius * (1 + epsilon).
• Raises:
  • TypeError – If epsilon is not a float or int
  • ValueError – If epsilon is negative

set_filter(filter_expression=None)

Set the filter expression for the query.

• Parameters: filter_expression (Optional [ Union [ str , FilterExpression ] ] , optional) – The filter expression or query string to use on the query.
• Raises: TypeError – If filter_expression is not a valid FilterExpression or string.

set_hybrid_policy(hybrid_policy)

Set the hybrid policy for the query.

• Parameters: hybrid_policy (str) – The hybrid policy to use. Options are "BATCHES" or "ADHOC_BF".
• Raises: ValueError – If hybrid_policy is not one of the valid options

set_search_buffer_capacity(search_buffer_capacity)

Set the SEARCH_BUFFER_CAPACITY parameter for the range query.

• Parameters: search_buffer_capacity (int) – Tuning parameter for SVS-VAMANA indexes using two-level compression.
• Raises:
  • TypeError – If search_buffer_capacity is not an integer
  • ValueError – If search_buffer_capacity is not positive

set_search_window_size(search_window_size)

Set the SEARCH_WINDOW_SIZE parameter for the range query.

• Parameters: search_window_size (int) – The size of the search window for SVS-VAMANA range searches.
• Raises:
  • TypeError – If search_window_size is not an integer
  • ValueError – If search_window_size is not positive

set_use_search_history(use_search_history)

Set the USE_SEARCH_HISTORY parameter for the range query.

• Parameters: use_search_history (str) – Controls whether to use the search buffer or entire history. Must be one of "OFF", "ON", or "AUTO".
• Raises:
  • TypeError – If use_search_history is not a string
  • ValueError – If use_search_history is not one of the valid options

slop(slop)

Allow a maximum of N intervening non matched terms between phrase terms (0 means exact phrase).

• Parameters: slop (int)
• Return type: Query

sort_by(sort_spec=None, asc=True)

Set the sort order for query results.

This method supports sorting by single or multiple fields. Note that Redis Search natively supports only a single SORTBY field. When multiple fields are specified, only the FIRST field is used for the Redis SORTBY clause.

• Parameters:
  • sort_spec (str | Tuple [ str , str ] | List [ str | Tuple [ str , str ] ] | None) – Sort specification in various formats:
    • str: single field name
    • Tuple[str, str]: (field_name, "ASC"|"DESC")
    • List: list of field names or tuples
  • asc (bool) – Default sort direction when not specified (only used when sort_spec is a string). Defaults to True (ascending).
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises:
  • TypeError – If sort_spec is not a valid type.
  • ValueError – If direction is not "ASC" or "DESC".

Examples

>> query.sort_by("price")  # Single field, ascending
>> query.sort_by(("price", "DESC"))  # Single field, descending
>> query.sort_by(["price", "rating"])  # Multiple fields (only first used)
>> query.sort_by([("price", "DESC"), ("rating", "ASC")])

NOTE

When multiple fields are specified, only the first field is used for sorting in Redis. Future versions may support multi-field sorting through post-query sorting in Python.

timeout(timeout)

overrides the timeout parameter of the module

• Parameters: timeout (float)
• Return type: Query

verbatim()

Set the query to be verbatim, i.e. use no query expansion or stemming.

• Return type: Query

with_payloads()

Ask the engine to return document payloads.

• Return type: Query

with_scores()

Ask the engine to return document search scores.

• Return type: Query

property batch_size: int | None

Return the batch size for the query.

• Returns: The batch size for the query.
• Return type: Optional[int]

property distance_threshold: float

Return the distance threshold for the query.

• Returns: The distance threshold for the query.
• Return type: float

property epsilon: float | None

Return the epsilon for the query.

• Returns: The epsilon for the query, or None if not set.
• Return type: Optional[float]

property filter: str | FilterExpression

The filter expression for the query.

property hybrid_policy: str | None

Return the hybrid policy for the query.

• Returns: The hybrid policy for the query.
• Return type: Optional[str]

property params: Dict[str, Any]

Return the parameters for the query.

• Returns: The parameters for the query.
• Return type: Dict[str, Any]

property query: BaseQuery

Return self as the query object.

property search_buffer_capacity: int | None

Return the SEARCH_BUFFER_CAPACITY parameter for the query.

• Returns: The SEARCH_BUFFER_CAPACITY value for the query.
• Return type: Optional[int]

property search_window_size: int | None

Return the SEARCH_WINDOW_SIZE parameter for the query.

• Returns: The SEARCH_WINDOW_SIZE value for the query.
• Return type: Optional[int]

property use_search_history: str | None

Return the USE_SEARCH_HISTORY parameter for the query.

• Returns: The USE_SEARCH_HISTORY value for the query.
• Return type: Optional[str]

NOTE

Runtime Parameters for Range Queries

VectorRangeQuery supports runtime parameters for controlling range search behavior:

HNSW & SVS-VAMANA Parameters:

• epsilon: Range search approximation factor (default: 0.01)

SVS-VAMANA Parameters:

• search_window_size: Size of search window
• use_search_history: Whether to use search buffer (OFF/ON/AUTO)
• search_buffer_capacity: Tuning parameter for 2-level compression

Example:

from redisvl.query import VectorRangeQuery

query = VectorRangeQuery(
    vector=[0.1, 0.2, 0.3],
    vector_field_name="embedding",
    distance_threshold=0.3,
    epsilon=0.05,              # Approximation factor
    search_window_size=20,     # SVS-VAMANA only
    use_search_history='AUTO'  # SVS-VAMANA only
)

HybridQuery

class HybridQuery(*args, **kwargs)

Bases: AggregateHybridQuery

Backward compatibility wrapper for AggregateHybridQuery.

Deprecated

Deprecated since version HybridQuery: is a backward compatibility wrapper around AggregateHybridQuery and will eventually be replaced with a new hybrid query implementation. To maintain current functionality please use AggregateHybridQuery directly.",

Instantiates a AggregateHybridQuery object.

• Parameters:

  • text (str) – The text to search for.

  • text_field_name (str) – The text field name to search in.

  • vector (Union [ bytes , List [ float ] ]) – The vector to perform vector similarity search.

  • vector_field_name (str) – The vector field name to search in.

  • text_scorer (str , optional) – The text scorer to use. Options are {TFIDF, TFIDF.DOCNORM, BM25, DISMAX, DOCSCORE, BM25STD}. Defaults to "BM25STD".

  • filter_expression (Optional [FilterExpression ] , optional) – The filter expression to use. Defaults to None.

  • alpha (float , optional) – The weight of the vector similarity. Documents will be scored as: hybrid_score = (alpha) * vector_score + (1-alpha) * text_score. Defaults to 0.7.

  • dtype (str , optional) – The data type of the vector. Defaults to "float32".

  • num_results (int , optional) – The number of results to return. Defaults to 10.

  • return_fields (Optional [ List [ str ] ] , optional) – The fields to return. Defaults to None.

  • stopwords (Optional [ Union [ str , Set [ str ] ] ] , optional) –

    The stopwords to remove from the provided text prior to searchuse. If a string such as "english" "german" is provided then a default set of stopwords for that language will be used. if a list, set, or tuple of strings is provided then those will be used as stopwords. Defaults to "english". if set to "None" then no stopwords will be removed.

    Note: This parameter controls query-time stopword filtering (client-side). For index-level stopwords configuration (server-side), see IndexInfo.stopwords. Using query-time stopwords with index-level STOPWORDS 0 is counterproductive.

  • dialect (int , optional) – The Redis dialect version. Defaults to 2.

  • text_weights (Optional [ Dict [ str , float ] ]) – The importance weighting of individual words within the query text. Defaults to None, as no modifications will be made to the text_scorer score.

NOTE

AggregateHybridQuery uses FT.AGGREGATE commands which do NOT support runtime parameters. For runtime parameter support (ef_runtime, search_window_size, etc.), use VectorQuery or VectorRangeQuery which use FT.SEARCH commands.

• Raises:
  • ValueError – If the text string is empty, or if the text string becomes empty after stopwords are removed.
  • TypeError – If the stopwords are not a set, list, or tuple of strings.

add_scores()

If set, includes the score as an ordinary field of the row.

• Return type: AggregateRequest

apply(**kwexpr)

Specify one or more projection expressions to add to each result

Parameters

• kwexpr: One or more key-value pairs for a projection. The key is

  the alias for the projection, and the value is the projection expression itself, for example apply(square_root="sqrt(@foo)")

• Return type: AggregateRequest

dialect(dialect)

Add a dialect field to the aggregate command.

• dialect - dialect version to execute the query under

• Parameters: dialect (int)
• Return type: AggregateRequest

filter(expressions)

Specify filter for post-query results using predicates relating to values in the result set.

Parameters

• fields: Fields to group by. This can either be a single string,

  or a list of strings.

• Parameters: expressions (str | List [ str ])
• Return type: AggregateRequest

group_by(fields, *reducers)

Specify by which fields to group the aggregation.

Parameters

• fields: Fields to group by. This can either be a single string,

  or a list of strings. both cases, the field should be specified as @field.

• reducers: One or more reducers. Reducers may be found in the

  aggregation module.

• Parameters:
  • fields (List [ str ])
  • reducers (Reducer | List [ Reducer ])
• Return type: AggregateRequest

limit(offset, num)

Sets the limit for the most recent group or query.

If no group has been defined yet (via group_by()) then this sets the limit for the initial pool of results from the query. Otherwise, this limits the number of items operated on from the previous group.

Setting a limit on the initial search results may be useful when attempting to execute an aggregation on a sample of a large data set.

Parameters

• offset: Result offset from which to begin paging
• num: Number of results to return

Example of sorting the initial results:

AggregateRequest("@sale_amount:[10000, inf]") .limit(0, 10) .group_by("@state", r.count())

Will only group by the states found in the first 10 results of the query @sale_amount:[10000, inf]. On the other hand,

AggregateRequest("@sale_amount:[10000, inf]") .limit(0, 1000) .group_by("@state", r.count() .limit(0, 10)

Will group all the results matching the query, but only return the first 10 groups.

If you only wish to return a top-N style query, consider using sort_by() instead.

• Parameters:
  • offset (int)
  • num (int)
• Return type: AggregateRequest

load(*fields)

Indicate the fields to be returned in the response. These fields are returned in addition to any others implicitly specified.

Parameters

• fields: If fields not specified, all the fields will be loaded.

Otherwise, fields should be given in the format of @field.

• Parameters: fields (str)
• Return type: AggregateRequest

scorer(scorer)

Use a different scoring function to evaluate document relevance. Default is TFIDF.

• Parameters: scorer (str) – The scoring function to use (e.g. TFIDF.DOCNORM or BM25)
• Return type: AggregateRequest

set_text_weights(weights)

Set or update the text weights for the query.

• Parameters:
  • text_weights – Dictionary of word:weight mappings
  • weights (Dict [ str , float ])

sort_by(*fields, **kwargs)

Indicate how the results should be sorted. This can also be used for top-N style queries

Parameters

• fields: The fields by which to sort. This can be either a single

  field or a list of fields. If you wish to specify order, you can use the Asc or Desc wrapper classes.

• max: Maximum number of results to return. This can be

  used instead of LIMIT and is also faster.

Example of sorting by foo ascending and bar descending:

sort_by(Asc("@foo"), Desc("@bar"))

Return the top 10 customers:

AggregateRequest() .group_by("@customer", r.sum("@paid").alias(FIELDNAME)) .sort_by(Desc("@paid"), max=10)

• Parameters: fields (str)
• Return type: AggregateRequest

with_schema()

If set, the schema property will contain a list of [field, type] entries in the result object.

• Return type: AggregateRequest

property params: Dict[str, Any]

Return the parameters for the aggregation.

• Returns: The parameters for the aggregation.
• Return type: Dict[str, Any]

property stopwords: Set[str]

Return the stopwords used in the query. :returns: The stopwords used in the query. :rtype: Set[str]

property text_weights: Dict[str, float]

Get the text weights.

• Returns: weight mappings.
• Return type: Dictionary of word

NOTE

The stopwords parameter in HybridQuery (and AggregateHybridQuery) controls query-time stopword filtering (client-side). For index-level stopwords configuration (server-side), see redisvl.schema.IndexInfo.stopwords. Using query-time stopwords with index-level STOPWORDS 0 is counterproductive.

NOTE

Runtime Parameters for Hybrid Queries

Important: AggregateHybridQuery uses FT.AGGREGATE commands which do NOT support runtime parameters. Runtime parameters (ef_runtime, search_window_size, use_search_history, search_buffer_capacity) are only supported with FT.SEARCH commands.

For runtime parameter support, use VectorQuery or VectorRangeQuery instead of AggregateHybridQuery.

Example with VectorQuery (supports runtime parameters):

from redisvl.query import VectorQuery

query = VectorQuery(
    vector=[0.1, 0.2, 0.3],
    vector_field_name="embedding",
    return_fields=["description"],
    num_results=10,
    ef_runtime=150  # Runtime parameters work with VectorQuery
)

TextQuery

class TextQuery(text, text_field_name, text_scorer='BM25STD', filter_expression=None, return_fields=None, num_results=10, return_score=True, dialect=2, sort_by=None, in_order=False, params=None, stopwords='english', text_weights=None)

Bases: BaseQuery

TextQuery is a query for running a full text search, along with an optional filter expression.

from redisvl.query import TextQuery
from redisvl.index import SearchIndex

index = SearchIndex.from_yaml(index.yaml)

query = TextQuery(
    text="example text",
    text_field_name="text_field",
    text_scorer="BM25STD",
    filter_expression=None,
    num_results=10,
    return_fields=["field1", "field2"],
    stopwords="english",
    dialect=2,
)

results = index.query(query)

A query for running a full text search, along with an optional filter expression.

• Parameters:

  • text (str) – The text string to perform the text search with.

  • text_field_name (Union [ str , Dict [ str , float ] ]) – The name of the document field to perform text search on, or a dictionary mapping field names to their weights.

  • text_scorer (str , optional) – The text scoring algorithm to use. Defaults to BM25STD. Options are {TFIDF, BM25STD, BM25, TFIDF.DOCNORM, DISMAX, DOCSCORE}. See https://redis.io/docs/latest/develop/interact/search-and-query/advanced-concepts/scoring/

  • filter_expression (Union [ str , FilterExpression ] , optional) – A filter to apply along with the text search. Defaults to None.

  • return_fields (List [ str ]) – The declared fields to return with search results.

  • num_results (int , optional) – The top k results to return from the search. Defaults to 10.

  • return_score (bool , optional) – Whether to return the text score. Defaults to True.

  • dialect (int , optional) – The RediSearch query dialect. Defaults to 2.

  • sort_by (Optional [ SortSpec ]) – The field(s) to order the results by. Can be:

    • str: single field name
    • Tuple[str, str]: (field_name, "ASC"|"DESC")
    • List: list of fields or tuples Note: Only the first field is used for Redis sorting. Defaults to None. Results will be ordered by text score.

  • in_order (bool) – Requires the terms in the field to have the same order as the terms in the query filter, regardless of the offsets between them. Defaults to False.

  • params (Optional [ Dict [ str , Any ] ] , optional) – The parameters for the query. Defaults to None.

  • stopwords (Optional [ Union [ str , Set [ str ] ]) –

    The set of stop words to remove from the query text (client-side filtering). If a language like ‘english’ or ‘spanish’ is provided a default set of stopwords for that language will be used. Users may specify their own stop words by providing a List or Set of words. if set to None, then no words will be removed. Defaults to ‘english’.

    Note: This parameter controls query-time stopword filtering (client-side). For index-level stopwords configuration (server-side), see IndexInfo.stopwords. Using query-time stopwords with index-level STOPWORDS 0 is counterproductive.

  • text_weights (Optional [ Dict [ str , float ] ]) – The importance weighting of individual words within the query text. Defaults to None, as no modifications will be made to the text_scorer score.

• Raises:
  • ValueError – if stopwords language string cannot be loaded.
  • TypeError – If stopwords is not a valid iterable set of strings.

dialect(dialect)

Add a dialect field to the query.

• dialect - dialect version to execute the query under

• Parameters: dialect (int)
• Return type: Query

expander(expander)

Add a expander field to the query.

• expander - the name of the expander

• Parameters: expander (str)
• Return type: Query

in_order()

Match only documents where the query terms appear in the same order in the document. i.e. for the query "hello world", we do not match "world hello"

• Return type: Query

language(language)

Analyze the query as being in the specified language.

• Parameters: language (str) – The language (e.g. chinese or english)
• Return type: Query

limit_fields(*fields)

Limit the search to specific TEXT fields only.

• fields: A list of strings, case sensitive field names

from the defined schema.

• Parameters: fields (List [ str ])
• Return type: Query

limit_ids(*ids)

Limit the results to a specific set of pre-known document ids of any length.

• Return type: Query

no_content()

Set the query to only return ids and not the document content.

• Return type: Query

no_stopwords()

Prevent the query from being filtered for stopwords. Only useful in very big queries that you are certain contain no stopwords.

• Return type: Query

paging(offset, num)

Set the paging for the query (defaults to 0..10).

• offset: Paging offset for the results. Defaults to 0
• num: How many results do we want

• Parameters:
  • offset (int)
  • num (int)
• Return type: Query

query_string()

Return the query string of this query only.

• Return type: str

return_fields(*fields, skip_decode=None)

Set the fields to return with search results.

• Parameters:
  • *fields – Variable number of field names to return.
  • skip_decode (str | List [ str ] | None) – Optional field name or list of field names that should not be decoded. Useful for binary data like embeddings.
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises: TypeError – If skip_decode is not a string, list, or None.

scorer(scorer)

Use a different scoring function to evaluate document relevance. Default is TFIDF.

Since Redis 8.0 default was changed to BM25STD.

• Parameters: scorer (str) – The scoring function to use (e.g. TFIDF.DOCNORM or BM25)
• Return type: Query

set_field_weights(field_weights)

Set or update the field weights for the query.

• Parameters: field_weights (str | Dict [ str , float ]) – Either a single field name or dictionary of field:weight mappings

set_filter(filter_expression=None)

Set the filter expression for the query.

• Parameters: filter_expression (Optional [ Union [ str , FilterExpression ] ] , optional) – The filter expression or query string to use on the query.
• Raises: TypeError – If filter_expression is not a valid FilterExpression or string.

set_text_weights(weights)

Set or update the text weights for the query.

• Parameters:
  • text_weights – Dictionary of word:weight mappings
  • weights (Dict [ str , float ])

slop(slop)

Allow a maximum of N intervening non matched terms between phrase terms (0 means exact phrase).

• Parameters: slop (int)
• Return type: Query

sort_by(sort_spec=None, asc=True)

Set the sort order for query results.

This method supports sorting by single or multiple fields. Note that Redis Search natively supports only a single SORTBY field. When multiple fields are specified, only the FIRST field is used for the Redis SORTBY clause.

• Parameters:
  • sort_spec (str | Tuple [ str , str ] | List [ str | Tuple [ str , str ] ] | None) – Sort specification in various formats:
    • str: single field name
    • Tuple[str, str]: (field_name, "ASC"|"DESC")
    • List: list of field names or tuples
  • asc (bool) – Default sort direction when not specified (only used when sort_spec is a string). Defaults to True (ascending).
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises:
  • TypeError – If sort_spec is not a valid type.
  • ValueError – If direction is not "ASC" or "DESC".

Examples

>> query.sort_by("price")  # Single field, ascending
>> query.sort_by(("price", "DESC"))  # Single field, descending
>> query.sort_by(["price", "rating"])  # Multiple fields (only first used)
>> query.sort_by([("price", "DESC"), ("rating", "ASC")])

NOTE

When multiple fields are specified, only the first field is used for sorting in Redis. Future versions may support multi-field sorting through post-query sorting in Python.

timeout(timeout)

overrides the timeout parameter of the module

• Parameters: timeout (float)
• Return type: Query

verbatim()

Set the query to be verbatim, i.e. use no query expansion or stemming.

• Return type: Query

with_payloads()

Ask the engine to return document payloads.

• Return type: Query

with_scores()

Ask the engine to return document search scores.

• Return type: Query

property field_weights: Dict[str, float]

Get the field weights for the query.

• Returns: Dictionary mapping field names to their weights

property filter: str | FilterExpression

The filter expression for the query.

property params: Dict[str, Any]

Return the query parameters.

property query: BaseQuery

Return self as the query object.

property text_field_name: str | Dict[str, float]

Get the text field name(s) - for backward compatibility.

• Returns: Either a single field name string (if only one field with weight 1.0) or a dictionary of field:weight mappings.

property text_weights: Dict[str, float]

Get the text weights.

• Returns: weight mappings.
• Return type: Dictionary of word

NOTE

The stopwords parameter in TextQuery controls query-time stopword filtering (client-side). For index-level stopwords configuration (server-side), see redisvl.schema.IndexInfo.stopwords. Using query-time stopwords with index-level STOPWORDS 0 is counterproductive.

FilterQuery

class FilterQuery(filter_expression=None, return_fields=None, num_results=10, dialect=2, sort_by=None, in_order=False, params=None)

Bases: BaseQuery

A query for running a filtered search with a filter expression.

• Parameters:
  • filter_expression (Optional [ Union [ str , FilterExpression ] ]) – The optional filter expression to query with. Defaults to ‘*’.
  • return_fields (Optional [ List [ str ] ] , optional) – The fields to return.
  • num_results (Optional [ int ] , optional) – The number of results to return. Defaults to 10.
  • dialect (int , optional) – The query dialect. Defaults to 2.
  • sort_by (Optional [ SortSpec ] , optional) – The field(s) to order the results by. Can be:
    • str: single field name (e.g., "price")
    • Tuple[str, str]: (field_name, "ASC"|"DESC") (e.g., ("price", "DESC"))
    • List: list of fields or tuples (e.g., ["price", ("rating", "DESC")]) Note: Redis Search only supports single-field sorting, so only the first field is used. Defaults to None.
  • in_order (bool , optional) – Requires the terms in the field to have the same order as the terms in the query filter. Defaults to False.
  • params (Optional [ Dict [ str , Any ] ] , optional) – The parameters for the query. Defaults to None.
• Raises: TypeError – If filter_expression is not of type redisvl.query.FilterExpression

dialect(dialect)

Add a dialect field to the query.

• dialect - dialect version to execute the query under

• Parameters: dialect (int)
• Return type: Query

expander(expander)

Add a expander field to the query.

• expander - the name of the expander

• Parameters: expander (str)
• Return type: Query

in_order()

Match only documents where the query terms appear in the same order in the document. i.e. for the query "hello world", we do not match "world hello"

• Return type: Query

language(language)

Analyze the query as being in the specified language.

• Parameters: language (str) – The language (e.g. chinese or english)
• Return type: Query

limit_fields(*fields)

Limit the search to specific TEXT fields only.

• fields: A list of strings, case sensitive field names

from the defined schema.

• Parameters: fields (List [ str ])
• Return type: Query

limit_ids(*ids)

Limit the results to a specific set of pre-known document ids of any length.

• Return type: Query

no_content()

Set the query to only return ids and not the document content.

• Return type: Query

no_stopwords()

Prevent the query from being filtered for stopwords. Only useful in very big queries that you are certain contain no stopwords.

• Return type: Query

paging(offset, num)

Set the paging for the query (defaults to 0..10).

• offset: Paging offset for the results. Defaults to 0
• num: How many results do we want

• Parameters:
  • offset (int)
  • num (int)
• Return type: Query

query_string()

Return the query string of this query only.

• Return type: str

return_fields(*fields, skip_decode=None)

Set the fields to return with search results.

• Parameters:
  • *fields – Variable number of field names to return.
  • skip_decode (str | List [ str ] | None) – Optional field name or list of field names that should not be decoded. Useful for binary data like embeddings.
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises: TypeError – If skip_decode is not a string, list, or None.

scorer(scorer)

Use a different scoring function to evaluate document relevance. Default is TFIDF.

Since Redis 8.0 default was changed to BM25STD.

• Parameters: scorer (str) – The scoring function to use (e.g. TFIDF.DOCNORM or BM25)
• Return type: Query

set_filter(filter_expression=None)

Set the filter expression for the query.

• Parameters: filter_expression (Optional [ Union [ str , FilterExpression ] ] , optional) – The filter expression or query string to use on the query.
• Raises: TypeError – If filter_expression is not a valid FilterExpression or string.

slop(slop)

Allow a maximum of N intervening non matched terms between phrase terms (0 means exact phrase).

• Parameters: slop (int)
• Return type: Query

sort_by(sort_spec=None, asc=True)

Set the sort order for query results.

This method supports sorting by single or multiple fields. Note that Redis Search natively supports only a single SORTBY field. When multiple fields are specified, only the FIRST field is used for the Redis SORTBY clause.

• Parameters:
  • sort_spec (str | Tuple [ str , str ] | List [ str | Tuple [ str , str ] ] | None) – Sort specification in various formats:
    • str: single field name
    • Tuple[str, str]: (field_name, "ASC"|"DESC")
    • List: list of field names or tuples
  • asc (bool) – Default sort direction when not specified (only used when sort_spec is a string). Defaults to True (ascending).
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises:
  • TypeError – If sort_spec is not a valid type.
  • ValueError – If direction is not "ASC" or "DESC".

Examples

>> query.sort_by("price")  # Single field, ascending
>> query.sort_by(("price", "DESC"))  # Single field, descending
>> query.sort_by(["price", "rating"])  # Multiple fields (only first used)
>> query.sort_by([("price", "DESC"), ("rating", "ASC")])

NOTE

When multiple fields are specified, only the first field is used for sorting in Redis. Future versions may support multi-field sorting through post-query sorting in Python.

timeout(timeout)

overrides the timeout parameter of the module

• Parameters: timeout (float)
• Return type: Query

verbatim()

Set the query to be verbatim, i.e. use no query expansion or stemming.

• Return type: Query

with_payloads()

Ask the engine to return document payloads.

• Return type: Query

with_scores()

Ask the engine to return document search scores.

• Return type: Query

property filter: str | FilterExpression

The filter expression for the query.

property params: Dict[str, Any]

Return the query parameters.

property query: BaseQuery

Return self as the query object.

CountQuery

class CountQuery(filter_expression=None, dialect=2, params=None)

Bases: BaseQuery

A query for a simple count operation provided some filter expression.

• Parameters:
  • filter_expression (Optional [ Union [ str , FilterExpression ] ]) – The filter expression to query with. Defaults to None.
  • params (Optional [ Dict [ str , Any ] ] , optional) – The parameters for the query. Defaults to None.
  • dialect (int)
• Raises: TypeError – If filter_expression is not of type redisvl.query.FilterExpression

from redisvl.query import CountQuery
from redisvl.query.filter import Tag

t = Tag("brand") == "Nike"
query = CountQuery(filter_expression=t)

count = index.query(query)

dialect(dialect)

Add a dialect field to the query.

• dialect - dialect version to execute the query under

• Parameters: dialect (int)
• Return type: Query

expander(expander)

Add a expander field to the query.

• expander - the name of the expander

• Parameters: expander (str)
• Return type: Query

in_order()

Match only documents where the query terms appear in the same order in the document. i.e. for the query "hello world", we do not match "world hello"

• Return type: Query

language(language)

Analyze the query as being in the specified language.

• Parameters: language (str) – The language (e.g. chinese or english)
• Return type: Query

limit_fields(*fields)

Limit the search to specific TEXT fields only.

• fields: A list of strings, case sensitive field names

from the defined schema.

• Parameters: fields (List [ str ])
• Return type: Query

limit_ids(*ids)

Limit the results to a specific set of pre-known document ids of any length.

• Return type: Query

no_content()

Set the query to only return ids and not the document content.

• Return type: Query

no_stopwords()

Prevent the query from being filtered for stopwords. Only useful in very big queries that you are certain contain no stopwords.

• Return type: Query

paging(offset, num)

Set the paging for the query (defaults to 0..10).

• offset: Paging offset for the results. Defaults to 0
• num: How many results do we want

• Parameters:
  • offset (int)
  • num (int)
• Return type: Query

query_string()

Return the query string of this query only.

• Return type: str

return_fields(*fields, skip_decode=None)

Set the fields to return with search results.

• Parameters:
  • *fields – Variable number of field names to return.
  • skip_decode (str | List [ str ] | None) – Optional field name or list of field names that should not be decoded. Useful for binary data like embeddings.
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises: TypeError – If skip_decode is not a string, list, or None.

scorer(scorer)

Use a different scoring function to evaluate document relevance. Default is TFIDF.

Since Redis 8.0 default was changed to BM25STD.

• Parameters: scorer (str) – The scoring function to use (e.g. TFIDF.DOCNORM or BM25)
• Return type: Query

set_filter(filter_expression=None)

Set the filter expression for the query.

• Parameters: filter_expression (Optional [ Union [ str , FilterExpression ] ] , optional) – The filter expression or query string to use on the query.
• Raises: TypeError – If filter_expression is not a valid FilterExpression or string.

slop(slop)

Allow a maximum of N intervening non matched terms between phrase terms (0 means exact phrase).

• Parameters: slop (int)
• Return type: Query

sort_by(sort_spec=None, asc=True)

Set the sort order for query results.

This method supports sorting by single or multiple fields. Note that Redis Search natively supports only a single SORTBY field. When multiple fields are specified, only the FIRST field is used for the Redis SORTBY clause.

• Parameters:
  • sort_spec (str | Tuple [ str , str ] | List [ str | Tuple [ str , str ] ] | None) – Sort specification in various formats:
    • str: single field name
    • Tuple[str, str]: (field_name, "ASC"|"DESC")
    • List: list of field names or tuples
  • asc (bool) – Default sort direction when not specified (only used when sort_spec is a string). Defaults to True (ascending).
• Returns: Returns the query object for method chaining.
• Return type: self
• Raises:
  • TypeError – If sort_spec is not a valid type.
  • ValueError – If direction is not "ASC" or "DESC".

Examples

>> query.sort_by("price")  # Single field, ascending
>> query.sort_by(("price", "DESC"))  # Single field, descending
>> query.sort_by(["price", "rating"])  # Multiple fields (only first used)
>> query.sort_by([("price", "DESC"), ("rating", "ASC")])

NOTE

When multiple fields are specified, only the first field is used for sorting in Redis. Future versions may support multi-field sorting through post-query sorting in Python.

timeout(timeout)

overrides the timeout parameter of the module

• Parameters: timeout (float)
• Return type: Query

verbatim()

Set the query to be verbatim, i.e. use no query expansion or stemming.

• Return type: Query

with_payloads()

Ask the engine to return document payloads.

• Return type: Query

with_scores()

Ask the engine to return document search scores.

• Return type: Query

property filter: str | FilterExpression

The filter expression for the query.

property params: Dict[str, Any]

Return the query parameters.

property query: BaseQuery

Return self as the query object.

MultiVectorQuery

class MultiVectorQuery(vectors, return_fields=None, filter_expression=None, num_results=10, dialect=2)

Bases: AggregationQuery

MultiVectorQuery allows for search over multiple vector fields in a document simultaneously. The final score will be a weighted combination of the individual vector similarity scores following the formula:

score = (w_1 * score_1 + w_2 * score_2 + w_3 * score_3 + … )

Vectors may be of different size and datatype, but must be indexed using the ‘cosine’ distance_metric.

from redisvl.query import MultiVectorQuery, Vector
from redisvl.index import SearchIndex

index = SearchIndex.from_yaml("path/to/index.yaml")

vector_1 = Vector(
    vector=[0.1, 0.2, 0.3],
    field_name="text_vector",
    dtype="float32",
    weight=0.7,
)
vector_2 = Vector(
    vector=[0.5, 0.5],
    field_name="image_vector",
    dtype="bfloat16",
    weight=0.2,
)
vector_3 = Vector(
    vector=[0.1, 0.2, 0.3],
    field_name="text_vector",
    dtype="float64",
    weight=0.5,
)

query = MultiVectorQuery(
    vectors=[vector_1, vector_2, vector_3],
    filter_expression=None,
    num_results=10,
    return_fields=["field1", "field2"],
    dialect=2,
)

results = index.query(query)

Instantiates a MultiVectorQuery object.

• Parameters:
  • vectors (Union [Vector , List [Vector ] ]) – The Vectors to perform vector similarity search.
  • return_fields (Optional [ List [ str ] ] , optional) – The fields to return. Defaults to None.
  • filter_expression (Optional [ Union [ str , FilterExpression ] ]) – The filter expression to use. Defaults to None.
  • num_results (int , optional) – The number of results to return. Defaults to 10.
  • dialect (int , optional) – The Redis dialect version. Defaults to 2.

add_scores()

If set, includes the score as an ordinary field of the row.

• Return type: AggregateRequest

apply(**kwexpr)

Specify one or more projection expressions to add to each result

Parameters

• kwexpr: One or more key-value pairs for a projection. The key is

  the alias for the projection, and the value is the projection expression itself, for example apply(square_root="sqrt(@foo)")

• Return type: AggregateRequest

dialect(dialect)

Add a dialect field to the aggregate command.

• dialect - dialect version to execute the query under

• Parameters: dialect (int)
• Return type: AggregateRequest

filter(expressions)

Specify filter for post-query results using predicates relating to values in the result set.

Parameters

• fields: Fields to group by. This can either be a single string,

  or a list of strings.

• Parameters: expressions (str | List [ str ])
• Return type: AggregateRequest

group_by(fields, *reducers)

Specify by which fields to group the aggregation.

Parameters

• fields: Fields to group by. This can either be a single string,

  or a list of strings. both cases, the field should be specified as @field.

• reducers: One or more reducers. Reducers may be found in the

  aggregation module.

• Parameters:
  • fields (List [ str ])
  • reducers (Reducer | List [ Reducer ])
• Return type: AggregateRequest

limit(offset, num)

Sets the limit for the most recent group or query.

If no group has been defined yet (via group_by()) then this sets the limit for the initial pool of results from the query. Otherwise, this limits the number of items operated on from the previous group.

Setting a limit on the initial search results may be useful when attempting to execute an aggregation on a sample of a large data set.

Parameters

• offset: Result offset from which to begin paging
• num: Number of results to return

Example of sorting the initial results:

AggregateRequest("@sale_amount:[10000, inf]") .limit(0, 10) .group_by("@state", r.count())

Will only group by the states found in the first 10 results of the query @sale_amount:[10000, inf]. On the other hand,

AggregateRequest("@sale_amount:[10000, inf]") .limit(0, 1000) .group_by("@state", r.count() .limit(0, 10)

Will group all the results matching the query, but only return the first 10 groups.

If you only wish to return a top-N style query, consider using sort_by() instead.

• Parameters:
  • offset (int)
  • num (int)
• Return type: AggregateRequest

load(*fields)

Indicate the fields to be returned in the response. These fields are returned in addition to any others implicitly specified.

Parameters

• fields: If fields not specified, all the fields will be loaded.

Otherwise, fields should be given in the format of @field.

• Parameters: fields (str)
• Return type: AggregateRequest

scorer(scorer)

Use a different scoring function to evaluate document relevance. Default is TFIDF.

• Parameters: scorer (str) – The scoring function to use (e.g. TFIDF.DOCNORM or BM25)
• Return type: AggregateRequest

sort_by(*fields, **kwargs)

Indicate how the results should be sorted. This can also be used for top-N style queries

Parameters

• fields: The fields by which to sort. This can be either a single

  field or a list of fields. If you wish to specify order, you can use the Asc or Desc wrapper classes.

• max: Maximum number of results to return. This can be

  used instead of LIMIT and is also faster.

Example of sorting by foo ascending and bar descending:

sort_by(Asc("@foo"), Desc("@bar"))

Return the top 10 customers:

AggregateRequest() .group_by("@customer", r.sum("@paid").alias(FIELDNAME)) .sort_by(Desc("@paid"), max=10)

• Parameters: fields (str)
• Return type: AggregateRequest

with_schema()

If set, the schema property will contain a list of [field, type] entries in the result object.

• Return type: AggregateRequest

property params: Dict[str, Any]

Return the parameters for the aggregation.

• Returns: The parameters for the aggregation.
• Return type: Dict[str, Any]