Sage-Tips

Does DynamoDB have full text search?

DynamoDB is now integrated with Elasticsearch, enabling you to perform full-text queries on your data. DynamoDB streams are used to keep the search index up-to-date. You could do this, but it’s equivalent to doing filtering like today.

How do I query DynamoDB with non primary key field?

With the Global Secondary Index you can promote any NonKey attribute as the Partition Key for the Index and select another attribute for Sort Key for querying. For Local Secondary Index, you can promote any Non Key attribute as the Sort Key keeping the same Partition Key.

How do I search in DynamoDB console?

Open the DynamoDB console at https://console.aws.amazon.com/dynamodb/ ….Step 3: Query the Data

1. Change the operation from Scan to Query.
2. For the Partition key, enter the value Amazon DynamoDB#DynamoDB Thread 1 .
3. Choose Start. Only the items that match your query criteria are returned from the Reply table.

What is filter expression in DynamoDB?

A filter expression determines which items within the Query results should be returned to you. All of the other results are discarded. A filter expression is applied after a Query finishes, but before the results are returned.

What is Full Text Search example?

A Full-Text query allows you to search for words inside text data. For example, with a Full-Text query you can search for the word “werewolf” in the title of any of our movies. For example, a Full-Text search for “dent” will not match a piece of text that contains the word “students,” but a substring search will.

What is the difference between CloudSearch and Elasticsearch?

CloudSearch. While both services use proven technologies, Elasticsearch is more popular, open source, and has a flexible API to use for customization; in comparison, CloudSearch is fully managed and benefits from managed service features such as (near) plug-and-play startup and auto-patching and updating.

Can I Query DynamoDB without a partition key?

Hash key in DynamoDB The primary reason for that complexity is that you cannot query DynamoDB without the hash key. So, it’s not allowed to query the entire database. That means you cannot do what you would call a full table scan in other databases.

How do I Query a DynamoDB table in AWS?

Open the DynamoDB console at https://console.aws.amazon.com/dynamodb/ .

1. In the navigation pane on the left side of the console, choose Tables.
2. Choose the Music table from the table list.
3. Choose View items.
4. Choose Query.
5. For Partition key, enter Acme Band , and then choose Run.

What is global secondary index in DynamoDB?

DynamoDB supports two types of secondary indexes: Global secondary index — An index with a partition key and a sort key that can be different from those on the base table. A global secondary index is considered “global” because queries on the index can span all of the data in the base table, across all partitions.

What is an index in DynamoDB?

In a relational database, an index is a data structure that lets you perform fast queries on different columns in a table. You can use the CREATE INDEX SQL statement to add an index to an existing table, specifying the columns to be indexed.

How do I index an entire text table?

To create a full text index choose your table and right click on that table and select “Define Full-Text Index” option. Now select Unique Index. It is compulsory that for “Full Text Index” table must have at least one unique index. Select columns name and language types for columns.

How do I use the query operation in Amazon DynamoDB?

The Query operation in Amazon DynamoDB finds items based on primary key values. You must provide the name of the partition key attribute and a single value for that attribute. Query returns all items with that partition key value. Optionally, you can provide a sort key attribute and use a comparison operator to refine the search results.

How do I use the AWS SDK for JavaScript with DynamoDB?

In this tutorial, you use the AWS SDK for JavaScript to write simple applications to perform the following Amazon DynamoDB operations: Create a table named Movies and load sample data in JSON format. Perform create, read, update, and delete operations on the table. Run simple queries.

How do I search for a specific key in DynamoDB?

The Query operation in Amazon DynamoDB finds items based on primary key values. You must provide the name of the partition key attribute and a single value for that attribute. Query returns all items with that partition key value. Optionally, you can provide a sort key attribute and use a comparison operator to refine the search results.

Can DynamoDB data types be nested within each other?

These data types can be nested within each other, to represent complex data structures up to 32 levels deep. There is no limit on the number of values in a list or a map, as long as the item containing the values fits within the DynamoDB item size limit (400 KB).