Package org.mariadb.jdbc

Enum TransactionIsolation

    • Enum Constant Detail

      • REPEATABLE_READ

        public static final TransactionIsolation REPEATABLE_READ
        dirty reads and non-repeatable reads are prevented; phantom reads can occur. This level prohibits a transaction from reading a row with uncommitted changes in it, and it also prohibits the situation where one transaction reads a row, a second transaction alters the row, and the first transaction rereads the row, getting different values the second time (a "non-repeatable read").

      • READ_COMMITTED

        public static final TransactionIsolation READ_COMMITTED
        dirty reads are prevented; non-repeatable reads and phantom reads can occur. This level only prohibits a transaction from reading a row with uncommitted changes in it.

      • READ_UNCOMMITTED

        public static final TransactionIsolation READ_UNCOMMITTED
        dirty reads, non-repeatable reads and phantom reads can occur. This level allows a row changed by one transaction to be read by another transaction before any changes in that row have been committed (a "dirty read"). If any of the changes are rolled back, the second transaction will have retrieved an invalid row.

      • SERIALIZABLE

        public static final TransactionIsolation SERIALIZABLE
        dirty reads, non-repeatable reads and phantom reads are prevented. This level includes the prohibitions in TRANSACTION_REPEATABLE_READ and further prohibits the situation where one transaction reads all rows that satisfy a WHERE condition, a second transaction inserts a row that satisfies that WHERE condition, and the first transaction rereads for the same condition, retrieving the additional "phantom" row in the second read.

    • Method Detail

      • values

        public static TransactionIsolation[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows: 
        for (TransactionIsolation c : TransactionIsolation.values())
    System.out.println(c);
        Returns:
        an array containing the constants of this enum type, in the order they are declared

      • valueOf

        public static TransactionIsolation valueOf​(String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        IllegalArgumentException - if this enum type has no constant with the specified name
        NullPointerException - if the argument is null

      • from

        public static TransactionIsolation from​(String value)
        Get TransactionIsolation from value
        Parameters:
        value - value
        Returns:
        transaction isolation

      • getValue

        public String getValue()
        Get transaction isolation command
        Returns:
        transaction isolation command

      • getLevel

        public int getLevel()
        Get transaction isolation level
        Returns:
        transaction isolation level