Source code for airflow.providers.sqlite.hooks.sqlite

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import sqlite3

from airflow.hooks.dbapi import DbApiHook


[docs]class SqliteHook(DbApiHook): """Interact with SQLite."""
[docs] conn_name_attr = 'sqlite_conn_id'
[docs] default_conn_name = 'sqlite_default'
[docs] conn_type = 'sqlite'
[docs] hook_name = 'Sqlite'
[docs] def get_conn(self) -> sqlite3.dbapi2.Connection: """Returns a sqlite connection object""" conn_id = getattr(self, self.conn_name_attr) airflow_conn = self.get_connection(conn_id) conn = sqlite3.connect(airflow_conn.host) return conn
[docs] def get_uri(self) -> str: """Override DbApiHook get_uri method for get_sqlalchemy_engine()""" conn_id = getattr(self, self.conn_name_attr) airflow_conn = self.get_connection(conn_id) return f"sqlite:///{airflow_conn.host}"
@staticmethod def _generate_insert_sql(table, values, target_fields, replace, **kwargs): """ Static helper method that generates the INSERT SQL statement. The REPLACE variant is specific to MySQL syntax. :param table: Name of the target table :param values: The row to insert into the table :param target_fields: The names of the columns to fill in the table :param replace: Whether to replace instead of insert :return: The generated INSERT or REPLACE SQL statement :rtype: str """ placeholders = [ "?", ] * len(values) if target_fields: target_fields = ", ".join(target_fields) target_fields = f"({target_fields})" else: target_fields = '' if not replace: sql = "INSERT INTO " else: sql = "REPLACE INTO " sql += f"{table} {target_fields} VALUES ({','.join(placeholders)})" return sql

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