clickhouse-driver | ClickHouse Python Driver with native interface support
kandi X-RAY | clickhouse-driver Summary
kandi X-RAY | clickhouse-driver Summary
ClickHouse Python Driver with native interface support
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Top functions reviewed by kandi - BETA
- Receive a packet from the server
- Disconnects the socket
- Resets the connection state
- Read data from the server
- Write data to buf
- Prepare items
- Write raw data to a buffer
- Write null values to buffer
- Handle a Hello packet
- Create a socket
- Reads data from the server
- Write the data to the buffer
- Read data from the given buffer
- Fetch multiple rows
- Returns the result of the task generator
- Executes the given operation
- Read data from buffer
- Splits columns into chunks
- Write items to a buffer
- Write the contents of the file
- Normalize data
- Returns the result as a tuple
- Fetch all results
- Read a block from the stream
- Send a hello message
- Read the version from clickhouse_driver
clickhouse-driver Key Features
clickhouse-driver Examples and Code Snippets
Lines of Code : 2License : Strong Copyleft (CC BY-SA 4.0)
Copyclient = Client(host, user=user, password=password, database = 'default', send_receive_timeout = 1000)
is_insert = isinstance(params, (list, tuple, types.GeneratorType))
if is_insert:
rv = self.process_insert_query(
query, params, external_tables=external_tables,
query_id=query_id, types_check=types_check,
columresult , columns = client.execute('SELECT * FROM myTbl LIMIT 5',with_column_types=True)
df=pandas.DataFrame(result,columns=[tuple[0] for tuple in columns])
dfJson=df.to_json(orient='records')
...
infi.clickhouse_orm==1.0.4
import time
with ch_container as ch:
time.sleep(3)
client = Client(host='localhost')
print(client.execute("SHOW TABLES"))
Community Discussions
Trending Discussions on clickhouse-driver
QUESTION
(I am trying to copy a 7m row table from PostgreSQL to ClickHouse)
I'm running Postgres in Docker and copying to a tab separated variable dump file with:
...ANSWER
Answered 2022-Jan-21 at 20:09Add a setting date_time_input_format=best_effort
QUESTION
We are trying to connect to a clickhouse server using jdbc drivers. Our code snippet is in scala and would not be much different in java
...ANSWER
Answered 2021-Nov-20 at 07:59As mentioned by @AndreiKoch in the comments on the question, we had assumed the jdbc driver would use 9001 just like the clickhouse-driver used in the python: https://clickhouse-driver.readthedocs.io/_/downloads/en/0.0.20/pdf/ .
However, the native jdbc driver (used in the scala snippet) uses HTTP over port 8123.
QUESTION
I have some ETL that saves data to clickhouse with clickhouse-driver.
Save function looks exactly like this:
...ANSWER
Answered 2020-Oct-12 at 10:15Okay, further research on source code revealed the root cause.
The function that throws error substitute_params is called within the process_ordinary_query method of Client class. This method is basically called for any query other than INSERT.
The sign of query being either INSERT or any other is checked by this part of execute method:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install clickhouse-driver
You can use clickhouse-driver like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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