Airflow:SnowflakeOperator:Assign values from previous statement in SQL query - airflow

Question

Snowflake:Assign values from previous statement in SQL query
Requirement: Assign values from the previous statement to the next statement in SQL query , as I run the query in SnowflakeOperator in Airflow
SQL:
BEGIN
app = 'abc';
env = select current_database();
start_time = select current_timestamp()::timestamp_ntz(9);
end_time = select current_timestamp()::timestamp_ntz(9);
duration = (end_time.getTime() - start_time.getTime()) / 1000;
insert into proc_runtimes
(env, app, task, start_time, end_time, duration, message)
values
(env, app, 'Job Start', start_time.toISOString(), end_time.toISOString(), duration, log_message]})
END
EDIT:
Requirement: Assign values from the previous statement to the next statement in SQL query, as I run the query in SnowflakeOperator in Airflow
Error: Airflow SnowflakeOperator not able to execute the anonymous block statement in the SQL file
SQL:
BEGIN
let app := 'abc';
let env := current_database();
let start_time := current_timestamp()::timestamp_ntz(9);
let end_time := current_timestamp()::timestamp_ntz(9);
let duration := DATEDIFF(seconds, end_time, start_time);
let log_message := 'some log';
INSERT INTO proc_runtimes
(env, app, task_name, start_time, end_time, duration, message)
SELECT
:env, :app, 'Job Start', :start_time, :end_time, :duration, :log_message;
END;
Error:
2022-08-16, 19:38:43 UTC] {cursor.py:696} INFO - query: [BEGIN let env := current_database();]
[2022-08-16, 19:38:43 UTC] {cursor.py:720} INFO - query execution done
[2022-08-16, 19:38:43 UTC] {connection.py:509} INFO - closed
[2022-08-16, 19:38:44 UTC] {connection.py:512} INFO - No async queries seem to be running, deleting session
[2022-08-16, 19:38:44 UTC] {taskinstance.py:1889} ERROR - Task failed with exception
Traceback (most recent call last):
File "/home/airflow/.local/lib/python3.7/site-packages/airflow/providers/snowflake/operators/snowflake.py", line 120, in execute
execution_info = hook.run(self.sql, autocommit=self.autocommit, parameters=self.parameters)
File "/home/airflow/.local/lib/python3.7/site-packages/airflow/providers/snowflake/hooks/snowflake.py", line 301, in run
cur.execute(sql_statement)
File "/home/airflow/.local/lib/python3.7/site-packages/snowflake/connector/cursor.py", line 782, in execute
self.connection, self, ProgrammingError, errvalue
File "/home/airflow/.local/lib/python3.7/site-packages/snowflake/connector/errors.py", line 273, in errorhandler_wrapper
error_value,
File "/home/airflow/.local/lib/python3.7/site-packages/snowflake/connector/errors.py", line 324, in hand_to_other_handler
cursor.errorhandler(connection, cursor, error_class, error_value)
File "/home/airflow/.local/lib/python3.7/site-packages/snowflake/connector/errors.py", line 210, in default_errorhandler
cursor=cursor,
snowflake.connector.errors.ProgrammingError: 001003 (42000): 01a6551a-0501-b736-0251-83014fb1394b: SQL compilation error:
syntax error line 3 at position 34 unexpected '<EOF>'.

Answer 1

Variable should be defined(:= is assignment operator and can be later accessed:
Test table:
create or replace table proc_runtimes(env TEXT,
app TEXT,
task_name TEXT,
start_time timestamp_ntz(9),
end_time timestamp_ntz(9),
duration TEXT,
message TEXT);
Main block:
BEGIN
let app := 'abc';
let env := current_database();
let start_time := current_timestamp()::timestamp_ntz(9);
let end_time := current_timestamp()::timestamp_ntz(9);
let duration := DATEDIFF(seconds, end_time, start_time);
let log_message := 'some log';
INSERT INTO proc_runtimes
(env, app, task_name, start_time, end_time, duration, message)
SELECT
:env, :app, 'Job Start', :start_time, :end_time, :duration, :log_message;
END;
Check:
SELECT * FROM proc_runtimes;

Answer 2

Resolved the issue with below statement
execute immediate $$
BEGIN
....
....
....
END;
$$