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"""Task sql."""
import logging
import re
from typing import Dict, Optional
from pydolphinscheduler.constants import TaskType
from pydolphinscheduler.core.database import Database
from pydolphinscheduler.core.task import Task
log = logging.getLogger(__file__)
[docs]
class SqlType:
"""SQL type, for now it just contain `SELECT` and `NO_SELECT`."""
SELECT = "0"
NOT_SELECT = "1"
[docs]
class Sql(Task):
"""Task SQL object, declare behavior for SQL task to dolphinscheduler.
It should run sql job in multiply sql lik engine, such as:
- ClickHouse
- DB2
- HIVE
- MySQL
- Oracle
- Postgresql
- Presto
- SQLServer
You provider datasource_name contain connection information, it decisions which
database type and database instance would run this sql.
"""
_task_custom_attr = {
"sql",
"sql_type",
"pre_statements",
"post_statements",
"display_rows",
}
def __init__(
self,
name: str,
datasource_name: str,
sql: str,
sql_type: Optional[str] = None,
pre_statements: Optional[str] = None,
post_statements: Optional[str] = None,
display_rows: Optional[int] = 10,
*args,
**kwargs
):
super().__init__(name, TaskType.SQL, *args, **kwargs)
self.sql = sql
self.param_sql_type = sql_type
self.datasource_name = datasource_name
self.pre_statements = pre_statements or []
self.post_statements = post_statements or []
self.display_rows = display_rows
@property
def sql_type(self) -> str:
"""Judgement sql type, it will return the SQL type for type `SELECT` or `NOT_SELECT`.
If `param_sql_type` dot not specific, will use regexp to check
which type of the SQL is. But if `param_sql_type` is specific
will use the parameter overwrites the regexp way
"""
if (
self.param_sql_type == SqlType.SELECT
or self.param_sql_type == SqlType.NOT_SELECT
):
log.info(
"The sql type is specified by a parameter, with value %s",
self.param_sql_type,
)
return self.param_sql_type
pattern_select_str = (
"^(?!(.* |)insert |(.* |)delete |(.* |)drop "
"|(.* |)update |(.* |)truncate |(.* |)alter |(.* |)create ).*"
)
pattern_select = re.compile(pattern_select_str, re.IGNORECASE)
if pattern_select.match(self.sql) is None:
return SqlType.NOT_SELECT
else:
return SqlType.SELECT
@property
def task_params(self, camel_attr: bool = True, custom_attr: set = None) -> Dict:
"""Override Task.task_params for sql task.
sql task have some specials attribute for task_params, and is odd if we
directly set as python property, so we Override Task.task_params here.
"""
params = super().task_params
datasource = Database(self.datasource_name, "type", "datasource")
params.update(datasource)
return params