Trying to convert string value(2022-07-24T07:04:27.5765591Z) into datetime/timestamp to insert into SQL table in datetime format without losing any value till milliseconds. String which I am providing is actually a datetime and my source is ADLS CSV. I tried below options in data flow.
Using Projection-> Changed the datatype format for specific column into timestamp and format type-yyyy-MM-dd'T'HH:mm:ss.SSS'Z' however getting NULL in output.
Derived column-> Tried below expressions but getting NULL value in output
toTimestamp(DataLakeModified_DateTime,'%Y-%m-%dT%H:%M:%s%z')
toTimestamp(DataLakeModified_DateTime,'yyyy-MM-ddTHH:mm:ss:fffffffK')
toTimestamp(DataLakeModified_DateTime,'yyyy-MM-dd HH:mm:ss.SSS')
I want the same value in output-
2022-07-24T07:04:27.5765591Z (coming as string) to 2022-07-24T07:04:27.5765591Z (in datetime format which will be accepted by SQL database)
I have tried to repro the issue and it is also giving me the same error, i.e., null values for yyyy-MM-dd'T'HH:mm:ss.SSS'Z' timestamp format. The issue is with the string format you are providing in source. The ADF isn’t taking the given string as timestamp and hence giving NULL in return.
But if you tried with some different format, like keeping only 3 digits before Z in last format, it will convert it into timestamp and will not return NULL.
This is what I have tried. I have kept one timestamp as per your given data and other with some modification. Refer below image.
This will return NULL for the first time and datetime for second time.
But the format you are looking for is still missing. With the existing source format, the yyyy-MM-dd'T'HH:mm:ss would work fine. This format also works fine in SQL tables. I have tried and it’s working fine.
Try to use to String instead of timestamp and use this to create your Desired timestamp
toString(DataLakeModified_DateTime, 'yyyy-MM-dd HH:mm:ss:SS')
Related
How do we convert a string to date in cloud datafusion?
I have a column with the value say 20191120 (format of yyyyMMdd) i want to load this into a table in bigquery as date. The table column datatype is also date.
What i have tried so far is that i converted the string to timestamp using "parse-as-simple-date" and i try to convert it to format using format-date to "yyyy-MM-dd", but this step converts it to string and the final load fails. I have even tried to explicitly mention the column as date in the o/p schema as date. But it fails at runtime.
I tried keeping it as timestamp in the pipeline and try loading the date into Bigquery date type.
I noticed in the error that came op was field dt_1 incompatible with avro integer. Is datafusion internally converting the extract into avro before loading. AVRO does not have a date datatype which is causing the isssue?
Adding answer for posterity:
You can try doing these,
Go to LocalDateTime column in wrangler
Open dropdown and click on "Custom Transform"
Type timestamp.toLocalDate() (timestamp being the column name)
After the last step it should convert it into LocalDate type which you can write to bigquery. Hope this helps
For this specific date format, the Wrangler Transform directive would be:
parse-as-simple-date date_field_dt yyyyMMdd
set-column date_field_dt date_field_dt.toLocalDate()
The second line is required if the destination is of type Date.
Skip empty values:
set-column date_field_dt empty(date_field_dt) ? date_field_dt : date_field_dt.toLocalDate()
References:
https://github.com/data-integrations/wrangler/blob/develop/wrangler-docs/directives/parse-as-simple-date.md
https://github.com/data-integrations/wrangler/blob/develop/wrangler-docs/directives/parse-as-date.md
You could try to parse your input data with Data Fusion using Wrangler.
In order to test it out I have replicated a workflow where a Data Fusion pipeline is fed with data coming from BigQuery. This data is then parsed to the proper type and then it is exported back again to BigQuery. Note that the public dataset is “austin_311” and I have used ‘’311_request’ table as some of their columns are TIMESTAMP type.
The steps I have done are the following:
I have queried a public dataset that contained TIMESTAMP data using:
select * from `bigquery-public-data.austin_311.311_request`
limit 1000;
I have uploaded it to Google Cloud Storage.
I have created a new Data Fusion batch pipeline following this.
I have used the Wrangler to Parse CSV data to custom 'Simple Data' yyyy-MM-dd HH:mm:ss
I have exported Pipeline results to BigQuery.
This qwiklab has helped me through the steps.
Result:
Following the above procedure I have been able to export Data Fusion data to BigQuery and the DATE fields are exported as TIMESTAMP, as expected.
I have troubles converting HubSpot UNIX timestamp to date. Timestamp is stored as text value.
Value looks like this:
1549324800000
My logic was first to convert the number to bigint and later converted it to date using:
TO_CHAR(TO_TIMESTAMP(properties__vape_station__value)), 'DD/MM/YYYY')
What would be the best way to achieve converting UNIX Timestamp in text type to date in PostgreSQL 11.
You can cast the value in that column to a bigint and then use to_timestamp.
But apparently that column also stores empty strings rather than NULL values if no value is present, so you need to take that into account:
to_timestamp(nullif(trim(properties__vape_station__value),'')::bigint/1000)
This would still fail however if anything else than a number is stored in that column.
one column in my csv file is a date that is read as a string and it follows this pattern : 2018-09-19 10:27:28.409Z. I am struggling to convert the column from string to date.
The conversion options in spotfire didn't allow me to change the column type. however, I found the solution, at the moment of importing the data set (file) you need to specify the type (date time) and magically spotfire manages the conversion.
I have Excel data and trying to insert the data into MongoDB using Talend Big Data for Open Studio. This is my job,
tFileInputExcel --> tMap --> tMongoDBOutput
In excel sheet, i have a date value column in this format 7/13/2017(MM/dd/yyyy) as string type and I am trying to insert this column value as ISO format ISODate("2017-07-13T00:00:00.000Z") in MongoDB.
This is my Job:
tFileInputExcel:
tMap:
tMongoDBOutput:
When execute this job, I'm getting the below error.
Error:
When i change the parse format like this TalendDate.parseDate("MM/dd/yyyy",row1.ClosingDate) , I'm getting SimpleDateFormat error. Simple Date Format Error
How to resolve this issue?
you can do simply if you mongodb column schema is date:
TalendDate.parseDate("MM/dd/yyyy",row3.newColumn)
That will automatically convert the date in the date model that your mongoDB column have.
You can change in your schema in Talend the date Model like "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'".
This is a very common mistake doing in reading data without understanding the underlying data types.
I have blogged about this especially for Talend: https://www.tobiasmaasland.de/2017/07/20/using-date-in-talend-etl-jobs/
But let me explain a bit.
Sometimes Excel tries to convert data in the cell even if one might think the cell type is set to String. Insted, it is set to Date. As such, no conversion is needed and the type needs to be Date in the input component.
If it is a String and an error occurs, the the structure of the String is either not the same everywhere or some cells are empty (null). So you might be lucky with
TalendDate.parseDate("MM/dd/yyyy", (row1.ClosingDate == null), "01/01/1970", row1.ClosingDate)
I just assumed you might want to use a placeholder date insted of having null.
This heavily depends on the actual data type in the cells, if every cell has the same data type and if all the data is formatted correctly.
To sum up one of the facts in my blog post: Don't use String for dates. Use Date for dates in Excel. It makes everything easier.
I have been tasked with converting a string which can come in different formats like such(mm/dd/yyyy, m/dd/yyyy, or mm/d/yyyy). However, it needs to be converted into a Timestamp with the following format (yyyy-mm-dd-00.00.000000). I have tried multiple conversion techniques within the Transformer stage; however, I have been unsuccessful. Basically, I pull the data from a file and stage it into a file in the same format as the table. I then insert into the database using the second file.
The main issue I was running into was the fact that the format could be mm/dd/yyyy or m/d/yyyy. The solution to this was to add a ",s" to my StringToTimestamp function.
StringtoTimestamp(Input,,"%(m,s)/%(d,s)/%yyyy %hh:%nn:%ss").