Teradata Package for LangChain Function Reference - from_texts - 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_texts = from_texts(name, texts, embedding=None, **kwargs) class method of libs.teradata.langchain_teradata.vector_store.TeradataVectorStore
- DESCRIPTION:
Creates a new 'content-based' vector store from the input
text(s) and embeddings.
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 list of raw text strings.
Types: str
texts:
Required Argument.
Specifies the text(s) to be indexed for vector store.
Types: str or list of str
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
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_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
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
Types: str, TeradataAI, LangChain Embeddings
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
Types: str, TeradataAI, LangChain BaseChatModel
RETURNS:
VectorStore instance.
RAISES:
TeradataMlException.
EXAMPLES:
# Example 1: Create an instance of a content-based vector store by
# passing list of raw strings in "texts" and
# "amazon.titan-embed-text-v1" in "embedding".
# Initialize the required imports.
>>> from langchain_teradata import TeradataVectorStore
# Create the vector store instance.
>>> vs_instance = TeradataVectorStore.from_texts(name = "vs_example_1",
texts = ["This is a sample text.",
"This is another sample text."],
embedding="amazon.titan-embed-text-v1")
# Example 2: Create an instance of a content-based vector store by
# passing list of raw strings in "texts",
# Langchain AzureOpenAIEmbeddings object in "embedding".
# and Langchain AzureChatOpenAI object in "chat_completion_model".
# Initialize the required imports.
>>> from langchain_azure import AzureOpenAIEmbeddings, AzureChatOpenAI
>>> llm_azure = AzureOpenAIEmbeddings(model_name="text-embedding-ada-002",
api_key="azure_api_key",
azure_endpoint="azure_endpoint")
>>> model = AzureChatOpenAI(api_key = "<Enter Azure API Key>",
model_name = "gpt-35-turbo-16k",
azure_ad_token = "<Enter Azure AD Token>",
azure_endpoint="<Enter Azure Endpoint>",
azure_deployment="<Enter Azure Deployment>",
openai_api_version="<Enter OpenAI API Version>")
>>> vs_instance = TeradataVectorStore.from_texts(name = "vs_example_2",
texts = ["This is a sample text.",
"This is another sample text."],
embedding=llm_azure,
chat_completion_model=model)