[MySQL Error] Error executing DDL alter table like drop foreign key via JDBC Statement. MySQL 예약어 에러

문제 발생

개발을 진행하고 있는 상황이므로 jpa.ddl-auto를 create-drop으로 계속 사용하던 도중, 다음과 같은 에러가 발생하기 시작했다.

Error executing DDL alter table like drop foreign key via JDBC Statement

Table을 생성하는 도중 계속해서 에러가 발생하였다.

문제 해결

좋아요 기능을 개발하면서 Entity의 이름을 'LIKE'로 지정하면서 발생하게 되는 문제였다.
LIKE는 MySQL에서 사용되고 있는 예약어이므로 Entity의 이름으로 사용할 수 없도록 지정되어 있는 이름이었다.

기존 ENTITY

...
public class Like extends BaseEntity {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    @JoinColumn(name = "user_id")
    @ManyToOne(fetch = LAZY)
    private User user;

    @JoinColumn(name = "post_id")
    @ManyToOne(fetch = LAZY)
    private Post post;

    public static Likes toEntity(Post post, User user) {
        return Likes.builder()
                .user(user)
                .post(post)
                .build();
    }
}

해결 방법

• @Entity(name = "likes") 사용

@Entity(name = "likes")
public class Like extends BaseEntity {
}

• @Table(name = "likes") 추가

@Table(name = "likes")
@Entity
public class Like extends BaseEntity {
}

 

• Entity 이름 변경

public class Likes extends BaseEntity {
}

예약어 목록

ADD	ALL	ALTER
ANALYZE	AND	AS
ASC	ASENSITIVE	BEFORE
BETWEEN	BIGINT	BINARY
BLOB	BOTH	BY
CALL	CASCADE	CASE
CHANGE	CHAR	CHARACTER
CHECK	COLLATE	COLUMN
CONDITION	CONSTRAINT	CONTINUE
CONVERT	CREATE	CROSS
CURRENT_DATE	CURRENT_TIME	CURRENT_TIMESTAMP
CURRENT_USER	CURSOR	DATABASE
DATABASES	DAY_HOUR	DAY_MICROSECOND
DAY_MINUTE	DAY_SECOND	DEC
DECIMAL	DECLARE	DEFAULT
DELAYED	DELETE	DESC
DESCRIBE	DETERMINISTIC	DISTINCT
DISTINCTROW	DIV	DOUBLE
DROP	DUAL	EACH
ELSE	ELSEIF	ENCLOSED
ESCAPED	EXISTS	EXIT
EXPLAIN	FALSE	FETCH
FLOAT	FLOAT4	FLOAT8
FOR	FORCE	FOREIGN
FROM	FULLTEXT	GRANT
GROUP	HAVING	HIGH_PRIORITY
HOUR_MICROSECOND	HOUR_MINUTE	HOUR_SECOND
IF	IGNORE	IN
INDEX	INFILE	INNER
INOUT	INSENSITIVE	INSERT
INT	INT1	INT2
INT3	INT4	INT8
INTEGER	INTERVAL	INTO
IS	ITERATE	JOIN
KEY	KEYS	KILL
LEADING	LEAVE	LEFT
LIKE	LIMIT	LINES
LOAD	LOCALTIME	LOCALTIMESTAMP
LOCK	LONG	LONGBLOB
LONGTEXT	LOOP	LOW_PRIORITY
MATCH	MEDIUMBLOB	MEDIUMINT
MEDIUMTEXT	MIDDLEINT	MINUTE_MICROSECOND
MINUTE_SECOND	MOD	MODIFIES
NATURAL	NOT	NO_WRITE_TO_BINLOG
NULL	NUMERIC	ON
OPTIMIZE	OPTION	OPTIONALLY
OR	ORDER	OUT
OUTER	OUTFILE	PRECISION
PRIMARY	PROCEDURE	PURGE
READ	READS	REAL
REFERENCES	REGEXP	RELEASE
RENAME	REPEAT	REPLACE
REQUIRE	RESTRICT	RETURN
REVOKE	RIGHT	RLIKE
SCHEMA	SCHEMAS	SECOND_MICROSECOND
SELECT	SENSITIVE	SEPARATOR
SET	SHOW	SMALLINT
SONAME	SPATIAL	SPECIFIC
SQL	SQLEXCEPTION	SQLSTATE
SQLWARNING	SQL_BIG_RESULT	SQL_CALC_FOUND_ROWS
SQL_SMALL_RESULT	SSL	STARTING
STRAIGHT_JOIN	TABLE	TERMINATED
THEN	TINYBLOB	TINYINT
TINYTEXT	TO	TRAILING
TRIGGER	TRUE	UNDO
UNION	UNIQUE	UNLOCK
UNSIGNED	UPDATE	USAGE
USE	USING	UTC_DATE
UTC_TIME	UTC_TIMESTAMP	VALUES
VARBINARY	VARCHAR	VARCHARACTER
VARYING	WHEN	WHERE
WHILE	WITH	WRITE
XOR	YEAR_MONTH	ZEROFILL

 

MySQL 예약어 - 제타위키