--structures
--positions
CREATE TABLE structWorldPositions (id INTEGER PRIMARY KEY, structID INTEGER, posX INTEGER, posY INTEGER);
CREATE INDEX structWorldPositionsIDIndex ON structWorldPositions (structID);
CREATE INDEX structWorldPositionsPosIndex ON structWorldPositions (posX, posY);

--data
CREATE TABLE structData (id INTEGER PRIMARY KEY, structID INTEGER, dataVal VARCHAR);
CREATE INDEX structDataIDIndex ON structData (structID);