Error Result Sql After Optimize

[245Bluesky]

Sql Fragment:
((CAST(random_id AS BIGINT) % 20 = 0) = TRUE)

Optimize with rules:
pushdown_predicates
simplify

Result:
CAST(random_id AS BIGINT) % 20 = 0 = TRUE

ps: The Result Sql is a wrong sql.

A Test Example:
sql = """
SELECT DATE_TRUNC('day', CAST("dt" AS TIMESTAMP)) AS "dt1",
APPROX_DISTINCT(CASE
WHEN "event" = 'Start' THEN "distinct_id"
END, 0.0040625) + 6 AS "metric#q3ll_g"
FROM table_1
WHERE "dt" < '2023-08-30'
AND "dt" >= '2023-08-29'
AND ((CAST("random_id" AS BIGINT) % 20 = 0) = TRUE)
GROUP BY DATE_TRUNC('day', CAST("dt" AS TIMESTAMP))
ORDER BY "metric#q3ll_g" DESC
LIMIT 10
"""

[tobymao]

@245Bluesky can you be more specific and explain why it's not correct?

[245Bluesky]

After Run The Result Sql :
SELECT DATE_TRUNC('day', CAST("table_1"."dt" AS TIMESTAMP)) AS "dt1", APPROX_DISTINCT( CASE WHEN "table_1"."event" = '$AppStart' THEN "table_1"."distinct_id" END, 0.0040625 ) + 6 AS "metric#q3ll_g" FROM "table_1" AS "table_1" WHERE "table_1"."dt" < '2023-08-30' AND "table_1"."dt" >= '2023-08-29' AND CAST("table_1"."random_id" AS BIGINT) % 20 = 0 = TRUE AND "table_1"."event" = '$AppStart' GROUP BY DATE_TRUNC('day', CAST("table_1"."dt" AS TIMESTAMP)) ORDER BY "metric#q3ll_g" DESC LIMIT 10

With Trino
trino error: line 3:61: mismatched input '='. Expecting: '%', '*', '+', ',', '-', '.', '/', 'AND', 'AS', 'AT', 'EXCEPT', 'FETCH', 'FROM', 'GROUP', 'HAVING', 'INTERSECT', 'LIMIT', 'OFFSET', 'OR', 'ORDER', 'UNION', 'WHERE', 'WINDOW', '[', '||', ,

With Awsathena:
awsathena error: An error occurred (InvalidRequestException) when calling the StartQueryExecution operation: line 3:61: mismatched input '='. Expecting: '%', '*', '+', ',', '-', '.', '/', 'AND', 'AS', 'AT', 'EXCEPT', 'FROM', 'GROUP', 'HAVING', 'INTERSECT', 'LIMIT', 'OFFSET', 'OR', 'ORDER', 'UNION', 'WHERE', '[', '||', ,

[tobymao]

Thanks, please add this additional detail next time.

[245Bluesky]

👍 ok, thanks. Solved so quickly！

[245Bluesky]

Hi, tobymao, May I ask a question?

How to judge a expression in Select with ‘CASE WHEN’ is Nested or Parallel by using sqlglot?

for example：
1、Nested
CASE
WHEN condition_1 THEN
CASE
WHEN nested_condition_1 THEN result_1
WHEN nested_condition_2 THEN result_2
ELSE nested_result
END
WHEN condition_2 THEN result_3
ELSE result_4
END AS nested_case,

2、Parallel
CASE
WHEN condition_5 THEN result_5
WHEN condition_6 THEN result_6
ELSE result_7
END AS standalone_case1,
CASE
WHEN condition_8 THEN result_8
WHEN condition_9 THEN result_9
ELSE result_9
END AS standalone_case2

My code like:
for index, expression in enumerate(self.sql_ast.expressions):
sub_expression = self.sql_ast.args['expressions'][index]
for case in sub_expression.find_all(exp.Case):
how to judge?