REBUILD statement
The REBUILD statement is used to rebuild resources in SurrealDB. It is usually used in relation to a specified Index to optimize performance. It is useful to rebuild indexes because sometimes M-TREE and HNSW index performances can degrade due to frequent updates.
Rebuilding the index will ensure the index is fully optimized.
Statement syntax
SurrealQL SyntaxREBUILD [
INDEX [ IF EXISTS ] @name ON [ TABLE ] @table
]
Note: The IF EXISTS and TABLE clauses are optional.
Example usage
For example, if you have a table called book and you have an index called uniq_isbn on the isbn field, you can rebuild the index using the following query:
REBUILD INDEX uniq_isbn ON book;
Using if exists clause Since 1.3.0
The following queries show an example of how to rebuild resources using the IF EXISTS clause, which will only rebuild the resource if it exists.
REBUILD INDEX IF EXISTS uniq_isbn ON book;