Support "Returning" part of DELETE statement.

[LonwoLonwo]

Hello!

Our user expecting some problem with DELETE statement with returning clause.
dbeaver/dbeaver#15946

Because delete from t returning *; statement can't be parsed
Please, add support of RETURNING clause in DELETE statement.

Encountered unexpected token: "returning" "RETURNING"
    at line 1, column 15.

Was expecting one of:

    ";"
    "ACTION"
    "ACTIVE"
    "ALGORITHM"
    "ARCHIVE"
    "ARRAY"
    "AS"
    "AT"
    "BYTE"
    "CASCADE"
    "CASE"
    "CAST"
    "CHANGE"
    "CHAR"
    "CHARACTER"
    "CHECKPOINT"
    "COLUMN"
    "COLUMNS"
    "COMMENT"
    "COMMIT"
    "COSTS"
    "CYCLE"
    "DBA_RECYCLEBIN"
    "DESC"
    "DESCRIBE"
    "DISABLE"
    "DISCONNECT"
    "DIV"
    "DO"
    "DUMP"
    "DUPLICATE"
    "ENABLE"
    "END"
    "EXCLUDE"
    "EXTRACT"
    "FALSE"
    "FILTER"
    "FIRST"
    "FLUSH"
    "FN"
    "FOLLOWING"
    "FORMAT"
    "FULLTEXT"
    "HISTORY"
    "INDEX"
    "INSERT"
    "INTERVAL"
    "ISNULL"
    "JSON"
    "KEY"
    "LAST"
    "LEADING"
    "LIMIT"
    "LINK"
    "LOCAL"
    "LOG"
    "MATERIALIZED"
    "NO"
    "NOLOCK"
    "NULLS"
    "OF"
    "OPEN"
    "ORDER"
    "OVER"
    "PARALLEL"
    "PARTITION"
    "PATH"
    "PERCENT"
    "PRECISION"
    "PRIMARY"
    "PRIOR"
    "QUERY"
    "QUIESCE"
    "RANGE"
    "READ"
    "RECYCLEBIN"
    "REGISTER"
    "REPLACE"
    "RESTRICTED"
    "RESUME"
    "ROW"
    "ROWS"
    "SCHEMA"
    "SEPARATOR"
    "SEQUENCE"
    "SESSION"
    "SHUTDOWN"
    "SIBLINGS"
    "SIGNED"
    "SIZE"
    "SKIP"
    "SUSPEND"
    "SWITCH"
    "SYNONYM"
    "SYSTEM"
    "TABLE"
    "TABLESPACE"
    "TEMP"
    "TEMPORARY"
    "TIMEOUT"
    "TO"
    "TOP"
    "TRUE"
    "TRUNCATE"
    "TRY_CAST"
    "TYPE"
    "UNQIESCE"
    "UNSIGNED"
    "USER"
    "USING"
    "VALIDATE"
    "VALUE"
    "VALUES"
    "VIEW"
    "WHERE"
    "XML"
    "ZONE"
    <EOF>
    <K_DATETIMELITERAL>
    <K_DATE_LITERAL>
    <K_NEXTVAL>
    <K_STRING_FUNCTION_NAME>
    <S_CHAR_LITERAL>
    <S_IDENTIFIER>
    <S_QUOTED_IDENTIFIER>

SQL Example
This statement doesn't work.

delete from t returning *;

And Update statement already support returning statement:

update t set a = 1 returning *;

I see that UPDATE supports returning clause, and DELETE statement - don't.

Software Information

• JSqlParser version - 4.2
• Database - PostgreSQL

[manticore-projects]

Thank you for reporting, I respond to the original issue and will (try to) provide a patch.