bazie H2 CREATE TABLE z przymusu

Question

Mam dwie SQL:

CREATE TABLE legs(legid INT PRIMARY KEY AUTO_INCREMENT NOT NULL, 
        playerid1 INT NOT NULL REFERENCES players(playerid), 
        playerid2 INT NOT NULL REFERENCES players(playerid), 
        added TIMESTAMP AS CURRENT_TIMESTAMP NOT NULL); 

ALTER TABLE legs ADD CONSTRAINT distinct_players CHECK(playerid1 <> playerid2); 

Jestem 99% pewien, że powinienem być w stanie skondensować je w jedno, a mianowicie:

CREATE TABLE table(... 
        playerid2 INT NOT NULL REFERENCES players(playerid) CHECK(playerid1 <> playerid2), 
        ...); 

Jednak jestem konsekwentne uzyskiwanie błędu składni. AFAIK, to tam powinno być ograniczenie.

Answer 1

CREATE TABLE legs(legid INT PRIMARY KEY AUTO_INCREMENT NOT NULL, 
        playerid1 INT NOT NULL REFERENCES players(playerid), 
        playerid2 INT NOT NULL REFERENCES players(playerid), 
        added TIMESTAMP AS CURRENT_TIMESTAMP NOT NULL, 
        CHECK (playerid1 <> playerid2));