CREATE TABLE DOC_VERSIONS (
    DOC_ID       D_INTEGER NOT NULL /* D_INTEGER = INTEGER */,
    VERSION_ID   D_INTEGER NOT NULL /* D_INTEGER = INTEGER */,
    IS_DELETED   D_BOOLEAN NOT NULL /* D_BOOLEAN = INTEGER CHECK (VALUE BETWEEN 0 and 1) */,
    DESCR        D_VARCHAR255 /* D_VARCHAR255 = VARCHAR(255) */,
    ATT_TYPE_ID  D_INTEGER NOT NULL /* D_INTEGER = INTEGER */,
    ATTACH       D_BLOB_ST0_L1024 NOT NULL /* D_BLOB_ST0_L1024 = BLOB SUB_TYPE 0 SEGMENT SIZE 1024 */,
    CREATED_AT   D_TIMESTAMP /* D_TIMESTAMP = TIMESTAMP */,
    CREATED_IN   D_SESSION_ID /* D_SESSION_ID = INTEGER */,
    DELETED_AT   D_TIMESTAMP /* D_TIMESTAMP = TIMESTAMP */,
    DELETED_IN   D_SESSION_ID /* D_SESSION_ID = INTEGER */,
    ATTACH_LEN   COMPUTED BY (char_length(attach))
);