Teradata Package for LangChain Function Reference - from_embeddings - Teradata® Package for LangChain - Look here for syntax, methods and examples for the functions included in the Teradata langchain-teradata package.
Teradata® Package for LangChain Function Reference
- Deployment
- VantageCloud
- Edition
- Enterprise
- Product
- Teradata® Package for LangChain
- Release Number
- 20.00.00.01
- Published
- December 2025
- ft:locale
- en-US
- ft:lastEdition
- 2025-12-19
- dita:id
- Langchain-Teradata_FxRef_Lake
- Product Category
- Teradata Vantage
- libs.teradata.langchain_teradata.TeradataVectorStore.from_embeddings = from_embeddings(name, data, **kwargs) class method of libs.teradata.langchain_teradata.vector_store.TeradataVectorStore
- DESCRIPTION:
Creates a new 'embedding-based' vector store from the
pre embedded input table(s) or DataFrame(s).
If vector store already exists, an error is raised.
Notes:
* Only admin users can use this method.
* Refer to the 'Admin Flow' section in the
User guide for details.
PARAMETERS:
name:
Required Argument.
Specifies the name of the vector store to be created from
input data.
Types: str
data:
Required Argument.
Specifies the table name(s)/teradataml DataFrame(s) that are pre embedded to be
indexed for vector store. Teradata recommends to use teradataml DataFrame as input.
Notes:
* If multiple tables/views are passed, each table should
have the columns which are mentioned in "data_columns"
and "key_columns".
* When "target_database" is not set, and only table name is passed to
"data", then the input is searched in default database.
Types: str or list of str or DataFrame
data_columns:
Required Argument.
Specifies the name of the column that contains the
pre embedded data.
Note:
When multiple data columns are specified, data is unpivoted
to get a new key column "AttributeName" and a single data column
"AttributeValue".
Types: str, list of str
key_columns:
Optional Argument.
Specifies the name(s) of the key column(s) to be used for indexing.
Types: str, list of str
is_normalized:
Optional Argument.
Specifies whether the input contains normalized embeddings.
Default Value: False
Types: bool
description:
Optional Argument.
Specifies the description of the vector store.
Types: str
target_database:
Optional Argument.
Specifies the database name where the vector store is created.
Notes:
* If not specified, vector store is created in the database
which is in use.
Types: str
vector_column:
Optional Argument.
Specifies the name of the column to be used for storing
the embeddings.
Default Value: vector_index
Types: str
metadata_columns:
Optional Argument.
Specifies the list of input column names to be used for metadata.
These columns just get accumulated in the vector store.
Types: list[str]
metadata_descriptions:
Optional Argument.
Specifies the deescriptions of the metadata columns. One value for each metadata column.
Note:
Applicable to all store types except metadata-based store type.
Types: list[str]
use_simd:
Optional Argument.
Specifies whether to use SIMD for faster processing.
Types: bool
embedding_datatype:
Optional Argument.
Specifies the data type of the embeddings to be used.
Default Value: VECTOR32
Permitted Values: VECTOR32, VECTOR64
Types: str
embedding:
Required for NVIDIA NIM, Optional otherwise.
Specifies the embeddings model to be used for generating the
embeddings.
Default Value:
For AWS: amazon.titan-embed-text-v2:0
For Azure: text-embedding-3-small
Permitted Values:
For AWS:
* amazon.titan-embed-text-v1
* amazon.titan-embed-image-v1
* amazon.titan-embed-text-v2:0
For Azure:
* text-embedding-ada-002
* text-embedding-3-small
* text-embedding-3-large
For NIM:
* Any hosted NVIDIA model for embedding generation
Types: str, TeradataAI
embeddings_dims:
Required for NVIDIA NIM, Optional otherwise.
Specifies the number of dimensions to be used for generating the embeddings.
The value depends on the "embeddings".
Note:
* Default dimesions is set to 1024 for embedding-based vector store.
Default Value:
For AWS:
* amazon.titan-embed-text-v1: 1536
* amazon.titan-embed-image-v1: 1024
* amazon.titan-embed-text-v2:0: 1024
For Azure:
* text-embedding-ada-002: 1536
* text-embedding-3-small: 1536
* text-embedding-3-large: 3072
Permitted Values:
*For AWS:
* amazon.titan-embed-text-v1: 1536
* amazon.titan-embed-image-v1: [256, 384, 1024]
* amazon.titan-embed-text-v2:0: [256, 512, 1024]
*For Azure:
* text-embedding-ada-002: 1536 only
* text-embedding-3-small: 1 <= dims <= 1536
* text-embedding-3-large: 1 <= dims <= 3072
Types: str
chat_completion_model:
Required for NVIDIA NIM, Optional otherwise.
Specifies the name of the chat completion model to be used for
generating text responses.
Default Value:
For AWS: anthropic.claude-3-haiku-20240307-v1:0
For Azure: gpt-35-turbo-16k
Permitted Values:
*For AWS:
* anthropic.claude-3-haiku-20240307-v1:0
* anthropic.claude-instant-v1
* anthropic.claude-3-5-sonnet-20240620-v1:0
*For Azure:
* gpt-35-turbo-16k
*For NIM:
* Any hosted chat completion model
Types: str, TeradataAI
chat_completion_max_tokens:
Required for NVIDIA NIM, Optional otherwise.
Specifies the maximum number of tokens to be generated by the
"chat_completion_model".
Default Value: 16384
Permitted Values: [1, 16384]
Types: int
model_urls:
Optional Argument.
Specifies the URL and models to be used for embedding, chat completion
and guardrails.
Note:
* Refer to the ModelUrlParams class for more details.
Types: ModelUrlParams
RETURNS:
VectorStore instance.
RAISES:
TeradataMlException.
EXAMPLES:
# Example 1: Create an instance of an 'embedding-based' vector store
# by passing the 'amazon_reviews_embedded' table to
# "data" and "data_columns" as 'embedding'.
# Load the amazon reviews embedded data.
>>> from teradatagenai import VectorStore, load_data
>>> from teradataml import DataFrame
>>> load_data('amazon', 'amazon_reviews_embedded')
>>> vs_instance = TeradataVectorStore.from_embeddings(name = "vs_example_1",
data = 'amazon_reviews_embedded',
data_columns = ['embedding'])
# Example 2: Create an instance of an 'embedding-based' vector store from
# embeddings generated using TextAnalyticsAI.
# Import the required modules.
>>> import os
>>> from langchain_teradata import TeradataVectorStore
>>> from teradatagenai import TeradataAI, TextAnalyticsAI, load_data
>>> from teradataml import DataFrame
# Load the employee data.
>>> load_data('employee', 'employee_data')
>>> data = DataFrame('employee_data')
# Initialize the TeradataAI object using environment variables.
>>> os.environ["AWS_DEFAULT_REGION"] = "<Enter AWS Region>"
>>> os.environ["AWS_ACCESS_KEY_ID"] = "<Enter AWS Access Key ID>"
>>> os.environ["AWS_SECRET_ACCESS_KEY"] = "<Enter AWS Secret Key>"
>>> llm_embedding = TeradataAI(api_type = "aws",
model_name = "amazon.titan-embed-text-v2:0")
# Create an instance of the TextAnalyticsAI class.
>>> obj_embeddings = TextAnalyticsAI(llm=llm_embedding)
# Get the embeddings for the 'articles' column in the data.
>>> TAI_embeddings = obj_embeddings.embeddings(column="articles",
data=data,
accumulate='articles',
output_format='VECTOR')
# Create an instance of the VectorStore class.
>>> vs_instance = TeradataVectorStore.from_embeddings(name = "vs_example_2",
data = TAI_embeddings,
data_columns = ['Embedding'],
embedding_data_columns = "articles",
metadata_columns = ["employee_data", "employee_name"])