How to set up alter index unusable in postgresql ?

What does the alter index unusable command do in PostgreSQL ?

Unlike some other database systems, PostgreSQL does not support the "ALTER INDEX...UNUSABLE" command. To get a similar outcome, we can either remove and rebuild the index or use partial indexes.

So How does this work ?

1. Dropping the existing index and recreating a new index: We can drop an index in PostgreSQL and rebuild it later to make it temporarily ineffectual. Dropping an index takes it away from the database, while rebuilding it puts back the index with the stated columns and parameters.

2. Utilizing partial indexes: Additionally, we can build a "unusable" index by implementing a condition that will always be false.

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