Sorry my english is not good.
I have problem with to display data format "geometry" from mysql database. I got the data from file extension .geojson (like json but but contains coordinate), I convert the .geojson data with cmd. and this data is formed.
for example my geojson data
and this is an example of converting geojson to database
i use laravel, to display this data what is the task of laravel or mysql (eg there is a special mysql function)? and how?
What are you looking to do with the geometry data and have you looked at the Geo JSON functions https://dev.mysql.com/doc/refman/8.0/en/spatial-geojson-functions.html such as St+GeomFromJson()??
Related
I need to import JSON data in a WP database. I found the correct table of the database but the example JSON data present in table is not in a normal JSON format.
I need to import:
{"nome": "Pippo","cognome": "Paperino"}
but the example data in the table is:
a:2:{s:4:"nome";s:5:"Pippo";s:7:"cognome";s:8:"Paperino";}
How i can convert my JSON to "WP JSON"?
The data is serialized, that's why it looks weird. You can use maybe_unserialize() in WordPress, this function will unserialize the data if it was serialized.
https://developer.wordpress.org/reference/functions/maybe_unserialize/
Some functions serialize data before saving it in wordpress, and some will also unserialize when pulling from the DB. So depending on how you save it, and how you later extract the data, you might end up with serialized data.
I have a MySQL table whose data I have to export to .csv and then ingest this .csv to GeoMesa.
My Mysql table structure is like below:
[
Now, as you can see the the_geom attribute of table has data type point and in database it is stored as blob like shown below:
Now I have two problems :
When I export the MySQL data into a (.csv) file my csv file shows (...) for the_geom attribute as shown below instead of any binary representation or anything which will allow it to be ingested in GeoMesa. So, how to overcome this?
Csv file also shows # for any attribute with datetime datatype but if you expand the column the date time can be seen as sown in below picture (however my question is does it will cause problem in geomesa?).
For #1, MySQL's export is not automatically converting the Point datatype into text for you. You might need to call a conversion function such as AsWKT to output the geometry as Well Known Text. The WKT format can be used by GeoMesa to read in the Point data.
For #2, I think you'll need to do the same for the date field. Check out the date and time functions.
I have json files, volume is approx 500 TB. I have loaded complete set into hive data warehouse.
How would I validate or test the data that was loaded into hive warehouse. What should be my testing strategy ?
Client want us to validate the json data. Whether the data loaded into hive is correct ot not. Is there any miss? If yes, which field it was?
Please help.
How is your data being stored in hive tables ?
One option is create a Hive UDF function that receive the JSON string and validate the data and return another string with the error message or an empty string if the JSON string is well formed.
Here is a Hve UDF tutorial: http://blog.matthewrathbone.com/2013/08/10/guide-to-writing-hive-udfs.html
With the Hive UDF function in place you can executequeries like:
select strjson, validateJson(strjson) from jsonTable where validateJson(strjson) != "";
Can anyone recommend a code snippet, script, tool for converting a Hive Map field to a Redshift JSON field?
I have a Hive table that has two Map fields and I need to move the data to Redshift. I can easily move the data to a string format but then lose some functionality with that. Would prefer to have Map ported to JSON to maintain key, value pairs.
Thanks.
You might want to try the to_json UDF
http://brickhouseconfessions.wordpress.com/2014/02/07/hive-and-json-made-simple/
I'm using jqGrid and I would like to convert from mysql statements to PDO (PHP Data Objects) but when I convert the statements to PDO the data doesn't display in the grid but I know that the scripts are retrieving data. I looked at the trirand demos (click on 'Loading Data' then JSON data) and it gives examples with the deprecated mysql statements. I am unable to find a lot of resources that aid in the conversion from mysql to PDO for jqGrid.
So the next thing I did was compare the FORMAT of the two sets of outputted data (mysql and PDO).
Here is the mysql formatted data (Output):
{"rows":[["01","3701","37010100","37010102","37A","01","Executive Offices","SEC","Office of the Secretary","Y"], etc...]}
Then the PDO formatted data (Output):
[{"unit_id":"01","div_id":"3701","org_code":"37010100","l1l2_id":"37010102","CSA_id":"37A","area_id":"01","long_desc":"Executive Offices","short_desc":"SEC","unit_desc":"Office of the Secretary","avail_ind":"Y"}]
I think that the reason why jqGrid is not display the data in the grid is because it's not accepting the PDO format of the data. But I don't know how to format the PDO data to simulate the format that the mysql format. What should I do?
Thanks in advance.
I found this post and it suggested changing echo json_encode($stmt->fetchAll(PDO::FETCH_ASSOC)); to echo json_encode($stmt->fetchAll(PDO::FETCH_NUM)); and it formatted the data correctly so jqGrid could display the data.