pqrs | Command line tool for inspecting Parquet files | Serialization library
kandi X-RAY | pqrs Summary
kandi X-RAY | pqrs Summary
Command line tool for inspecting Parquet files
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of pqrs
pqrs Key Features
pqrs Examples and Code Snippets
❯ pqrs schema data/cities.parquet
Metadata for file: data/cities.parquet
version: 1
num of rows: 3
created by: parquet-mr version 1.5.0-cdh5.7.0 (build ${buildNumber})
message hive_schema {
OPTIONAL BYTE_ARRAY continent (UTF8);
OPTIONAL group co
❯ pqrs --help
pqrs 0.1.1
Manoj Karthick
Apache Parquet command-line utility
USAGE:
pqrs [FLAGS] [SUBCOMMAND]
FLAGS:
-d, --debug Show debug output
-h, --help Prints help information
-V, --version Prints version informat
❯ pqrs merge --input data/pems-1.snappy.parquet data/pems-2.snappy.parquet --output data/pems-merged.snappy.parquet
❯ ls -al data
total 408
drwxr-xr-x 6 manojkarthick staff 192 Feb 14 08:53 .
drwxr-xr-x 20 manojkarthick staff 640 Feb 14
Community Discussions
Trending Discussions on pqrs
QUESTION
A complete noob here. I'm trying to simulate an old phone keyboard, when there were physical buttons that were grouped like ABC, DEF, ..., PQRS, etc, and you could click a button once for the first letter, twice for the second and so on. I know about the existence of mousePressed() and doubleCliked() functions, but is there a way to detect triple and quadruple clicks?
...ANSWER
Answered 2021-May-26 at 20:21The best way to do what you are describing is to have variables that store which button was pressed last, how many times it has been pressed in a row, and what time it was pressed. Then you can determine whether or not to increment the count if the same button is pressed again in a particular window of time.
QUESTION
I have an XSLT with
...ANSWER
Answered 2021-May-22 at 05:41I am guessing (!) you want to do something like:
QUESTION
I am trying to map some values of JSON response to another variable but getting some error "Cannot set property name of undefined"
...ANSWER
Answered 2021-May-13 at 11:16action[i]
is undefined if not initialized. So, before setting any properties to it you need to initialize it, like so:
QUESTION
I am learning PHP, and would like to know if there is any way to hide an option depending on what I get, basiccaly this is my code it's simple.
...ANSWER
Answered 2021-Mar-24 at 13:24Based on the above requirement, try this:
QUESTION
Phone Number = "3662277815781519518916891"
Words = ["foo", "bar", "baz", "foobar", "emo", "cap", "car", "cat"]
foo -> 366
...ANSWER
Answered 2021-Mar-15 at 17:31Keep it simple. The dictionary should take a single letter and convert it to a digit.
{'a':'2', 'b':'2', 'c':'2', 'd':'3', ...}
QUESTION
I have three large tables (employee_info, driver_info, school_info) that I have joined together on common attributes using a series of LEFT OUTER JOIN
operations. After each join, the resulting number of records increased slightly, indicating that there are duplicate IDs in the data. To try and find all of the duplicates in the IDs, I dumped the ID columns into a temp table like so:
In this overly simplified example, you will see that IDs 1234
(employee_id), strf
(driver_id), and aaaa
(school_id) are each duplicated at least once. I would like to add a count column for each of the ID columns, and populate them with the count for each ID used, like so:
You can see that IDs 1234
and strf
each have 2 in the count, and aaaa
has 3. After generating this table, my goal is to pull out all records where any of the counts are greater than 1, like so:
In my real-world work, the JOIN'd table contains 100 columns, 15 different ID fields and over 30,000 records, and the final table came out to be 28 more than the original. This may seem like a small amount, but each of the 28 represent a broken link that we must fix.
Is there a simple way to get the counts populated like in the second table above? I have been wrestling with this for hours already, and have not been able to make this work. I tried some aggregate functions, but they cannot be used in table UPDATE operations.
...ANSWER
Answered 2021-Mar-01 at 03:54The COUNT
function, when used as an analytic function, can do what you want here, e.g.
QUESTION
string strMap[8] = {"abc", "def", "ghi", "jkl", "mno", "pqrs", "tuv", "wxyz"};
//string digits received as parameter in function // digits = "234";
...ANSWER
Answered 2021-Feb-11 at 22:01This line makes no sense:
QUESTION
I am having a csv file, quotes around each field.
there are some fields, which can have multiple double quotes inside them. I want to escape each of them with additional double quote.
","ABC "XYZ" PQRS","
","ABC "XYZ"","
","ABC "A" "B" TEST","
","ABC 2.5" "C" Test","
I took help from the link and able to cover for scenarios with single double quote inside content, using regular expression [regex]$r='(","[^"]+"[^"]+?",")'
. But, stuck up in the cases, where there are multiple double quotes inside content.
ANSWER
Answered 2021-Feb-08 at 17:15It is probably easier to search for the valid delimiters (e.g. "\s*,\s*"
) and split your lines into fields, and than simply correct each (invalid) single double quote with 2 quotes in each field.
Than rebuild the fields to a record by surrounding the fields with double quotes and join them with the csv
(comma) delimiter
Input
QUESTION
Am Kind of new to MySql and am trying to retrieve a query but got struck for some time.
Sample data set:
...ANSWER
Answered 2021-Jan-26 at 06:39On MySQL 8+ using ROW_NUMBER
, we can try:
QUESTION
Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e.: number of characters in the name). If there is more than one smallest or largest city, choose the one that comes first when ordered alphabetically. The STATION table is described as follows:
Sample Input
For example, CITY has four entries: DEF, ABC, PQRS and WXY.
Sample Output
...ANSWER
Answered 2021-Jan-26 at 09:25A little bit of analytic functions; sample data in lines #1 - 6; query begins at line #7.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install pqrs
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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