mirror of
https://github.com/Infinidat/infi.clickhouse_orm.git
synced 2024-11-10 19:36:33 +03:00
88 lines
3.2 KiB
Python
88 lines
3.2 KiB
Python
from infi.clickhouse_orm import Database, F
|
|
from charts import tables_piechart, columns_piechart, number_formatter, bytes_formatter
|
|
from flask import Flask
|
|
from flask import render_template
|
|
import sys
|
|
|
|
|
|
app = Flask(__name__)
|
|
|
|
|
|
@app.route('/')
|
|
def homepage_view():
|
|
'''
|
|
Root view that lists all databases.
|
|
'''
|
|
db = _get_db('system')
|
|
# Get all databases in the system.databases table
|
|
DatabasesTable = db.get_model_for_table('databases', system_table=True)
|
|
databases = DatabasesTable.objects_in(db).exclude(name='system')
|
|
databases = databases.order_by(F.lower(DatabasesTable.name))
|
|
# Generate the page
|
|
return render_template('homepage.html', db=db, databases=databases)
|
|
|
|
|
|
@app.route('/<db_name>/')
|
|
def database_view(db_name):
|
|
'''
|
|
A view that displays information about a single database.
|
|
'''
|
|
db = _get_db(db_name)
|
|
# Get all the tables in the database, by aggregating information from system.columns
|
|
ColumnsTable = db.get_model_for_table('columns', system_table=True)
|
|
tables = ColumnsTable.objects_in(db).filter(database=db_name).aggregate(
|
|
ColumnsTable.table,
|
|
compressed_size=F.sum(ColumnsTable.data_compressed_bytes),
|
|
uncompressed_size=F.sum(ColumnsTable.data_uncompressed_bytes),
|
|
ratio=F.sum(ColumnsTable.data_uncompressed_bytes) / F.sum(ColumnsTable.data_compressed_bytes)
|
|
)
|
|
tables = tables.order_by(F.lower(ColumnsTable.table))
|
|
# Generate the page
|
|
return render_template('database.html',
|
|
db=db,
|
|
tables=tables,
|
|
tables_piechart_by_rows=tables_piechart(db, 'total_rows', value_formatter=number_formatter),
|
|
tables_piechart_by_size=tables_piechart(db, 'total_bytes', value_formatter=bytes_formatter),
|
|
)
|
|
|
|
|
|
@app.route('/<db_name>/<tbl_name>/')
|
|
def table_view(db_name, tbl_name):
|
|
'''
|
|
A view that displays information about a single table.
|
|
'''
|
|
db = _get_db(db_name)
|
|
# Get table information from system.tables
|
|
TablesTable = db.get_model_for_table('tables', system_table=True)
|
|
tbl_info = TablesTable.objects_in(db).filter(database=db_name, name=tbl_name)[0]
|
|
# Get the SQL used for creating the table
|
|
create_table_sql = db.raw('SHOW CREATE TABLE %s FORMAT TabSeparatedRaw' % tbl_name)
|
|
# Get all columns in the table from system.columns
|
|
ColumnsTable = db.get_model_for_table('columns', system_table=True)
|
|
columns = ColumnsTable.objects_in(db).filter(database=db_name, table=tbl_name)
|
|
# Generate the page
|
|
return render_template('table.html',
|
|
db=db,
|
|
tbl_name=tbl_name,
|
|
tbl_info=tbl_info,
|
|
create_table_sql=create_table_sql,
|
|
columns=columns,
|
|
piechart=columns_piechart(db, tbl_name, 'data_compressed_bytes', value_formatter=bytes_formatter),
|
|
)
|
|
|
|
|
|
def _get_db(db_name):
|
|
'''
|
|
Returns a Database instance using connection information
|
|
from the command line arguments (optional).
|
|
'''
|
|
db_url = sys.argv[1] if len(sys.argv) > 1 else 'http://localhost:8123/'
|
|
username = sys.argv[2] if len(sys.argv) > 2 else None
|
|
password = sys.argv[3] if len(sys.argv) > 3 else None
|
|
return Database(db_name, db_url, username, password, readonly=True)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
_get_db('system') # fail early on db connection problems
|
|
app.run(debug=True)
|