Fix SQLite examples having PostgreSQL :: syntax

According to discussion here
#897 (comment)

Author: ppom

examples/corporate-conundrum/game.sql

@@ -3,7 +3,7 @@ select * FROM sqlpage_shell;
 -- Display the list of players with a link for each one to start playing
 INSERT INTO players(name, game_id)
 SELECT $Player as name,
-    $id::integer as game_id
+    CAST($id AS INTEGER) as game_id
 WHERE $Player IS NOT NULL;
 
 SELECT 'list' as component,
@@ -17,7 +17,7 @@ SELECT name as title,
         )
      ) as link
 FROM players
-WHERE game_id = $id::integer;
+WHERE game_id = CAST($id AS INTEGER);
 ---------------------------
 -- Player insertion form --
 ---------------------------
@@ -35,7 +35,7 @@ INSERT INTO game_questions(
         impostor,
         game_order
     )
-SELECT $id::integer as game_id,
+SELECT CAST($id AS INTEGER) as game_id,
     questions.id as question_id,
     -- When the true answer is small, set the wrong answer to just +/- 1, otherwise -25%/+75%.
     -- When it is a date between 1200 and 2100, make it -25 % or +75 % of the distance to today
@@ -50,8 +50,8 @@ SELECT $id::integer as game_id,
     random() as game_order
 FROM questions
     LEFT JOIN game_questions ON questions.id = game_questions.question_id
-    AND game_questions.game_id = $id::integer
+    AND game_questions.game_id = CAST($id AS INTEGER)
 WHERE game_questions.question_id IS NULL
     AND $Player IS NOT NULL
 ORDER BY random()
-LIMIT 1;
+LIMIT 1;

examples/corporate-conundrum/wait.sql

@@ -1,8 +1,8 @@
 -- Redirect to the next question when all players have answered
 set page_params = json_object('game_id', $game_id, 'player', $player);
 select CASE
-        (SELECT count(*) FROM answers WHERE question_id = $question_id AND game_id = $game_id::integer)
-        WHEN (SELECT count(*) FROM players WHERE game_id = $game_id::integer)
+        (SELECT count(*) FROM answers WHERE question_id = $question_id AND game_id = CAST($game_id AS INTEGER))
+        WHEN (SELECT count(*) FROM players WHERE game_id = CAST($game_id AS INTEGER))
         THEN '0; ' || sqlpage.link('next-question.sql', $page_params)
         ELSE 3
     END as refresh,
@@ -11,22 +11,22 @@ FROM sqlpage_shell;
 
 -- Insert the answer into the answers table
 INSERT INTO answers(game_id, player_name, question_id, answer_value)
-SELECT $game_id::integer as game_id,
+SELECT CAST($game_id AS INTEGER) as game_id,
     $player as player_name,
-    $question_id::integer as question_id,
-    $answer::integer as answer_value
+    CAST($question_id AS INTEGER) as question_id,
+    CAST($answer AS INTEGER) as answer_value
 WHERE $answer IS NOT NULL;
 -- Redirect to the next question
 SELECT 'text' as component,
     'Waiting for other players to answer... The following players still have not answered: ' as contents;
 select group_concat(name, ', ') as contents,
     TRUE as bold
 from players
-where game_id = $game_id::integer
+where game_id = CAST($game_id AS INTEGER)
     and not EXISTS (
         SELECT 1
         FROM answers
-        WHERE answers.game_id = $game_id::integer
+        WHERE answers.game_id = CAST($game_id AS INTEGER)
             AND answers.player_name = players.name
-            AND answers.question_id = $question_id::integer
-    );
+            AND answers.question_id = CAST($question_id AS INTEGER)
+    );

examples/plots tables and forms/index.sql

@@ -112,7 +112,7 @@ FROM nums as a, nums as b
 WHERE -- The powerful thing is here
     $x IS NULL
     OR -- The syntax $x allows us to extract the value 'a' when the URL ends with '?x=a'. It will be null if the URL does not contain '?x='
-    b.x = $x::DECIMAL
+    b.x = CAST($x AS DECIMAL)
 ORDER BY a.x, b.x;
 -- So when we click the card for "a times b", we will reload the page, and display only the multiplication table of a
 ---------------------------
@@ -164,4 +164,4 @@ select 'checkbox' as type,
 select 'debug' as component;
 select $x as x,
     :"First Name" as firstName,
-    :checks as checks;
+    :checks as checks;