[jira] [Created] (AIRFLOW-809) SqlAlchemy is_ ColumnOperator Causing Errors in MSSQL

["Chad T Henderson (JIRA)" <ji...@apache.org>]

Chad T Henderson created AIRFLOW-809:
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             Summary: SqlAlchemy is_ ColumnOperator Causing Errors in MSSQL
                 Key: AIRFLOW-809
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-809
             Project: Apache Airflow
          Issue Type: Bug
          Components: models, scheduler
         Environment: Distributor ID: Ubuntu
Description:    Ubuntu 14.04.5 LTS
Release:        14.04
Codename:       trusty
Backend: MSSQL
Executor: LocalExecutor
            Reporter: Chad T Henderson
            Assignee: Chad T Henderson


Starting the scheduler produces the following error, which I believe is caused by the use of the _is ColumnOperator when checking the value of the external_trigger field on the DagRun object.

Error Text:

sqlalchemy.exc.ProgrammingError: (pyodbc.ProgrammingError) ('42000', "[42000] [FreeTDS][SQL Server]Incorrect syntax near '0'. (102) (SQLExecDirectW)") [SQL: 'SELECT TOP 1 dag_run.state AS dag_run_state, dag_run.id AS dag_run_id, dag_run.dag_id AS dag_run_dag_id, dag_run.execution_date AS dag_run_execution_date, dag_run.start_date AS dag_run_start_date, dag_run.end_date AS dag_run_end_date, dag_run.run_id AS dag_run_run_id, dag_run.external_trigger AS dag_run_external_trigger, dag_run.conf AS dag_run_conf \nFROM dag_run \nWHERE dag_run.dag_id = ? AND dag_run.external_trigger IS 0 ORDER BY dag_run.execution_date DESC'] [parameters: ('append_to_history',)]




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