How to Simulate Oracle's NEXTVAL Functionality for Auto-Increment in MySQL?

Retrieving Sequence Values in MySQL

In MySQL, the AUTO_INCREMENT attribute can be used to generate unique sequential values for rows. Unlike Oracle's NEXTVAL, which returns the next sequence value without requiring an insert, MySQL requires the use of a query or trigger to retrieve the current auto-increment value.

To obtain the current value, you can use the following query:

SELECT Auto_increment 
FROM information_schema.tables 
WHERE table_name='<table_name>';

Incrementing the Auto-Increment Value on Query

While the above query retrieves the current value, it does not increment it. To simulate the behavior of Oracle's NEXTVAL, you can use a combination of a SELECT query and an UPDATE statement:

BEGIN;
-- Retrieve the current value
SELECT Auto_increment INTO @current_value
FROM information_schema.tables 
WHERE table_name='<table_name>';

-- Increment the value
UPDATE information_schema.tables 
SET Auto_increment = Auto_increment + 1
WHERE table_name='<table_name>';
COMMIT;

-- Use the current value
SELECT @current_value;

Using Spring JDBC Template

If you are using Spring JDBC Template, you can achieve the functionality of Oracle's NEXTVAL using a stored procedure:

CREATE PROCEDURE get_next_id(OUT result INT)
BEGIN
  SELECT Auto_increment INTO result
  FROM information_schema.tables 
  WHERE table_name='<table_name>';

  UPDATE information_schema.tables 
  SET Auto_increment = Auto_increment + 1
  WHERE table_name='<table_name>';
END;

Then, execute the stored procedure using the Spring JDBC Template:

class AnimalRepository {

  private final NamedParameterJdbcTemplate namedParameterJdbcTemplate;

  public Integer getNextId() {
    Map<String, Integer> result = namedParameterJdbcTemplate.queryForMap("CALL get_next_id()", Map.of());
    return result.get("result");
  }
}

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