Add csv in cassandra - csv

How can I add .csv files from my local storage to Cassandra(running on AWS server) using puTTY.
I am trying this but it gives me an error saying "cant open. No matching path found" (even though the file is present in that location)
copy tableName (col1, col2,col3) from 'C:\Users\TEST.csv' with HEADER = true ;

The .csv file first has to be on an FTP application(example FileZilla) before uploading it to Cassandra while using puTTY.

Related

Loading .csv File into SQL Server using SSIS Technique

I am new to SQL Server and SSIS. I want to shedule the loading of .csv file into SQL Server.I want to run the loading for a specific time daily.Please help.Thanks in Advance.
You can do this by first creat the table(s) in SQL with the appropriate data types. Then by importing into SQL first and then write your script to update the table but a .bat file would require in order to run your scripts. The following is an example command for a .bat file: sqlcmd -S ServerName -U UserName P Password -i "C:\folder\update.sql"-o "C:\folder\output.txt"
You will need to write the .csv file to a text file and change the extension to .sql
You can use the "Bulk Insert Command"
Example:
BULK INSERT FILENAME
DATABASENAME.DBO.TABLENAME
FROM 'C:\sqlscript\fileName.csv'
WITH
(
FIELDTERMINATOR = ',',
ROWTERMINATOR = '\n'
)
GO
Hope this helps

Apache Cassandra Unable to load a csql file

I'm just starting out with Apache Cassandra. I have some csql files that define my data. I have got Cassandra installed on my machine and I did start it as per Apache Cassandra Wiki. Nothing suspicious!
I'm using the CLI to create the namespaces and the tables for which I have some cql files in a specific directory like:
create_tables.cql
load_tables.cql
I was able to successfully do the create_tables.cql, but when I tried to urn the load_tables.cql, I always end up seeing:
/Users/myUser/data/load-test-data.cql:7:Can't open 'test_data.csv' for reading: [Errno 2] No such file or directory: 'test_data.csv'
The load_tables.cql refers to another csv file that contains the test data that I want to populate my database with!
COPY test_table (id, name) FROM 'test_data.csv';
I tried doing al sort of permissions to the data folder where the cql files are, but still I keep getting this message. Any hints as to what I could do to get this solved?
Ok I got this one sorted! It has got to do with the absolute and relative paths. I ended up using an absolute path to where my CSV is located! This solved the issue!

Cypher Neo4j Couldn't load the external resource

In a Windows environment, I'm trying to load a .csv file with statement:
LOAD CSV WITH HEADERS FROM "file:///E:/Neo4j/customers.csv" AS row
It seems not to work properly and returns:
Couldn't load the external resource at:
file:/E:/Neo4j/Customers.csv
Neo.TransientError.Statement.ExternalResourceFailure
What am I doing wrong? thanks in advance
I was getting this error on Community Edition 3.0.1 on Mac OS X 10.10
It appears that the LOAD CSV file:/// looks for files in a predefined directory. One would think that in the argument that one would give the Cypher statement the full path but that is not the case.
The file:/// - for my situation" meant that neo4j would append the given argument you gave to one that was already predefined and then go look for that combined path
The file:/// pre-defined directory directory did not exist entirely
/Users/User/Documents/Neo4j/default.graphdb/import, in my computers directory structure I was missing the "/import" folder, which was not created at install
To fix on my system, I created an "import" directory, put the file to be read in that directory. I executed the Cypher load statement I ONLY put the name of the file to be read in the file argument i.e.
LOAD CSV file:///data.csv
this worked for me.
It appears to be a security configuration. Here's the original answer I found: https://stackoverflow.com/a/37444571/327004
You can add the following setting in conf/neo4j.conf in order to bypass this :
dbms.security.allow_csv_import_from_file_urls=true
Or change the import directory dbms.directories.import=import
You can find the answer in the file
"C:\Users\Jack\AppData\Roaming\Neo4j Community Edition\neo4j.conf"
(above "dbms.directories.import=import")
For version neo4j-community_windows-x64_3_1_1 you have to comment out this line or you have to create the folder \import (which isn´t created through the installation) and add your file into the folder.
There it´s written that due to security reasons they only allow file load from the \Documents\Neo4j\default.graphdb\import folder
After commenting out on # dbms.directories.import=import , you can execute e.g. from
LOAD CSV FROM "file:///C:/Users/Jack/Documents/products.csv" AS row
In neo4j.conf I didn´t have to add/set
dbms.security.allow_csv_import_from_file_urls=true
On (Arch) Linux + neo4j-community-3.4.0-alpha09, edit $NEO4J_HOME/conf
/neo4j.conf:
uncomment or add: dbms.security.allow_csv_import_from_file_urls=true
comment: #dbms.directories.import=import
Restart neo4j (in terminal: neo4j restart), and reload the Neo4j Browser (http://localhost:7474/browser/) if you are using a web browser as your Neo4j interface/GUI.
Then, you should be able to load a csv from outside your $NEO4J_HOME/... directory
E.g.,
LOAD CSV WITH HEADERS FROM "file:///mnt/Vancouver/Programming/data/metabolism/practice/a.csv" AS ...
where my $NEO4J_HOME/ is /mnt/Vancouver/apps/neo4j/neo4j-community-3.4.0-alpha09/
LOAD CSV WITH HEADERS FROM "file:/mnt/Vancouver/Programming/data/metabolism/practice/a.csv" AS ...
also works, but not
LOAD CSV WITH HEADERS FROM "file://mnt/Vancouver/Programming/data/metabolism/practice/a.csv" AS...
or
LOAD CSV WITH HEADERS FROM "/mnt/Vancouver/Programming/data/metabolism/practice/a.csv" AS...
i.e. use ...file:/... or ...file:///...
It's probably an URL issue, try file:c:/path/to/data.csv
See my blog posts:
http://jexp.de/blog/2014/10/load-cvs-with-success/
http://jexp.de/blog/2014/06/load-csv-into-neo4j-quickly-and-successfully/
For the ubuntu system, I placed the file in /usr/lib/neo4j which helped me solved the issue. On every other location, i tried giving full permissions(777) but the problem remains the same. After going through another stackoverflow post, i realized that the file should be kept in neo4j directory.
In the Neo4j desktop select the database you are using, go to the setting and there you will find the solution... just comment the "dbms.directories.import=import" line
# This setting constrains all LOAD CSV import files to be under the import directory. Remove or comment it out to
# allow files to be loaded from anywhere in the filesystem; this introduces possible security problems. See the
# LOAD CSV section of the manual for details.
dbms.directories.import=import ### COMMENT THIS LINE
For macOS Mojave v 10.14.5
Actually, I had to uncomment dbms.directories.import=import from ~/Library/Application Support/Neo4j Desktop/Application/neo4jDatabases/database-e2dd2a9c-d450-4639-861b-1e7e42b56b31/installation-3.5.5/conf/neo4j.conf and restart the service. Then it worked. All files has to be placed in import directory.
Run command LOAD CSV WITH HEADERS FROM 'FILE:/<yourCSV>.csv' as l return l
I am using the Neo4j Desktop and as others have said, the default graph database has a predefined import location. You can find the location by using the UI. If you put the CSV into the import directory, then you can use the relative path directly from you load csv command
Neo4j version is 3.1.1, OS is win10.
For me, LOAD CSV would read from Neo4j_Database_Location/testDB/import/artists.csv.
At first, I put csv file on the path F:\code\java\helloworld\artists.csv, and my cypher sentence is
LOAD CSV FROM 'file:///F:\\code\\java\\helloworld\\artists.csv' AS line
CREATE(:Artist {name:line[1],year:toInt(line[2])})
Then I get the error message returned as follows:
Couldn't load the external resource at: file:/D:/Neo4j/db/testDB/import/code/java/helloworld/artists.csv
It means neo4j itself concat the file path.
"D:/Neo4j/db/testDB/import/" is the Neo4j database location, and the "code/java/helloworld/artists.csv" is the csv file location.
For example, I install Neo4j on the path D:\Neo4j\Neo4j CE 3.1.1, and database loaction is D:\Neo4j\db. I put the CSV file on the path D:\Neo4j\db\testDB\import\artist.csv. If you don't have the file folder "import" on the path, you should creat it by yourself and put your file in the folder "import".
Then, put your csv file in the path, and input cyper sentence:
LOAD CSV from 'file:///artist.csv' as LINE
CREATE(:Artist {name:line[1],year:toInt(line[2])})
In a word, once you put the CSV file in the right path, the problem can be solved.
Related explaination in the LOAD CSV developer-manal
If dbms.directories.import is set to the default value import, using the above URLs in LOAD CSV would read from /import/myfile.csv and import/myproject/myfile.csv respectively.
If it is set to /data/csv, using the above URLs in LOAD CSV would read from /data/csv/myfile.csv and /data/csv/myproject/myfile.csv respectively.
Set the Property "dbms.directories.import=import"
Create folder 'import' explicitly at "/Users/User/Documents/Neo4j/default.graphdb/" because pre-defined directory did not exist entirely
place the csv data set here in the import folder
then run the code like - LOAD CSV FROM "file:///C:/customers.csv" AS row
In addition after you run the line, you can analyze what is going wrong in the code section to get a better understanding
you put your dataset into the import directory in neo4j-community path.
Then re-run your command.
Add your csv file in the import folder of neo4j installation guide to do this.
open neo4j and start graph of ur project
then in open folders tab open import folders
Copy ur csv file in this folder
Copy that part in ur load syntax as file:///C:/neo4j_module_datasets/test.csv since ur neo4j in running
in C drive
Snapshot for your reference
Use the following syntax:
LOAD CSV WITH HEADERS FROM "file:///my_collection.csv" AS row CREATE (n:myCollection) SET n = row
If you are running a docker then, follow these commands before running above query:
docker run \
-p=7474:7474 \
-p=7687:7687 \
-v=$HOME/neo4j/data:/data \
-v=$HOME/neo4j/logs:/logs \
-v=$HOME/local_import_dir:/var/lib/neo4j/import \
neo4j:3.0
Then,
sudo cp my_collection.csv /home/bajju/local_import_dir/
One of the following should solve the LOAD CSV errors (assuming you have dbms.security.allow_csv_import_from_file_urls=true)
If using Linux check for the permissions for the file. Change it using chmod 777 file_name.csv
Check if the file format/format for the contents within the file is correct.
The easiest way (be ware of security) is to serve you directory over http and use the http import
in the command line go the folder where csv files are lcoated
run the following depending on your python env.
Python 2
$ python -m SimpleHTTPServer 8000
Python 3
$ python3 -m http.server 8000
- Now you can load your files from your local host
LOAD CSV FROM 'http://localhost:8000/mycsvfile.csv' AS row
return row
- you can actually expose files on one host and load them where your DB is running by exposing the folder and replacing localhost with your IP

File not found in MySQL data directory

I am trying to load an XML file into a table on my localhost MySQL server. Per MySQL 5.6 refman page I have my file loaded in the Data directory however I keep getting the error that my file is not found. I executed the SHOW VARIABLES WHERE Variable_Name LIKE "%dir" command and found where my data dictionary is located (C:\ProgramData\MySQL\MySQL Server 5.6\Data) and it's where I put my xml file but still get the same error:
mysql> USE test
Database changed
mysql> LOAD XML LOCAL INFILE 'testXML.xml'
-> INTO TABLE testxml
-> ROWS IDENTIFIED BY '<Data>';
ERROR 2 (HY000): File 'testXML.xml' not found (Errcode: 2 - No such file
or directory)
Any suggestions/direction would be appreciated. Thanks.
I remember having such a problem once and the problem was the spaces in the path name.
If really the file is at the right place and a file not found occur, I would highly suspect that the folder name 'MySQL Server 5.6' is the problem. You can validate this easily, put the file in another folder instead of the data dir and try adding/removing spaces to the folder name and see if it works.
An other possibility is that your folder is located in an Admin directory and that you don't have right to access.

Get the latest updated file from FTP Folder

Kindly see this screen cast to get better idea about our requirement:
https://www.screenr.com/QmDN
We want to automate the Text Datasource Generation and connection to MS Excel in order to make it easier to the end-user to connect to the Text Datasource (CSV) to MS Excel so that they can generate their own reports.
The steps I have in mind:
Use WinSCP FTP Client with Scripting
Write script to get the most recent updated file from FTP Folder
Or instead of step 2, download all generated files from FTP to a Shared Folder on the Network.
Get the most recent version of the Generated CSV File
Rename the file to the Standard Naming Convention. This must be the name used in MS Excel as the CSV Text Datasource.
Delete all other files
I developed sample script that can be used by WinSCP to download the files from FTP folder:
# Automatically abort script on errors
option batch abort
# Disable overwrite confirmations that conflict with the previous
option confirm off
# Connect
open CSOD
# Change remote directory
cd /Reports/CAD
# Force binary mode transfer
option transfer binary
# Download file to the local directory d:\
#get "Training Attendance Data - Tarek_22_10_21_2014_05_05.CSV" "D:\MyData\Business\Talent Management System\Reports\WinCSP\"
get "*.CSV" "D:\MyData\Business\Talent Management System\Reports\WinCSP\Files\"
# Disconnect
close
exit
Then, I can schedule the above code to run periodically using this command:
winscp.com /script=example.txt
The above sample is working fine, but the main problem is how to identify the most recent file, so that I can rename it, and delete all the other files.
Appreciate your help.
Tarek
Just add the -latest switch to the get command:
get -latest "*.CSV" "D:\MyData\Business\Talent Management System\Reports\WinCSP\Files\"
For more details, see WinSCP article Downloading the most recent file.
You don't specify the language you use, here a Ruby script that downloads the most recent file of an FTP path. Just to demonstrate how easy and terse this can be done with a scripting language like Ruby.
require 'net/ftp'
Net::FTP.open('url of ftpsite') do |ftp|
ftp.login("username", "password")
path = "/private/transfer/*.*"
# file[55..-1] gives the filename part of the returned string
most_recent_file = ftp.list(path)[2..-1].sort_by {|file|ftp.mtime(file[55..-1])}.reverse.first[55..-1]
puts "downloading #{most_recent_file}"
ftp.getbinaryfile(most_recent_file, File.basename(most_recent_file))
puts "done"
end