Athena partitions data based on the location/date - amazon-web-services

Question

I have the below config to read data from S3 written there by Kinesis Firehose:
S3AthenaStore:
Type: AWS::S3::Bucket
Properties:
BucketName: ${self:custom.s3AthenaStore}
AnalysisGlueDatabase:
Type: AWS::Glue::Database
Properties:
CatalogId: !Ref AWS::AccountId
DatabaseInput:
Name: !Join
- ''
- - '${self:custom.glueName}-'
- 'db'
Description: "Analysis aws Glue database"
DependsOn:
- S3AthenaStore
AnalyticsGlueRole:
Type: AWS::IAM::Role
DependsOn:
- S3AnalyticsStore
Properties:
AssumeRolePolicyDocument:
Version: "2012-10-17"
Statement:
-
Effect: "Allow"
Principal:
Service:
- "glue.amazonaws.com"
Action:
- "sts:AssumeRole"
Path: "/"
ManagedPolicyArns:
['arn:aws:iam::aws:policy/service-role/AWSGlueServiceRole']
Policies:
-
PolicyName: "S3BucketAccessPolicy"
PolicyDocument:
Version: "2012-10-17"
Statement:
-
Effect: "Allow"
Action:
- "s3:GetObject"
- "s3:PutObject"
Resource:
- !Join
- ''
- - !GetAtt S3AnalyticsStore.Arn
- "*"
AnalyticsGlueCrawler:
Type: AWS::Glue::Crawler
Properties:
Name: "AnalysisCrawler"
Role: !GetAtt AnalyticsGlueRole.Arn
DatabaseName: !Ref AnalysisGlueDatabase
Targets:
S3Targets:
- Path: !Ref S3AnalyticsStore
SchemaChangePolicy:
UpdateBehavior: "LOG"
DeleteBehavior: "LOG"
Schedule:
ScheduleExpression: "cron(00 0/1 * * ? *)"
RecrawlPolicy:
RecrawlBehavior: CRAWL_NEW_FOLDERS_ONLY
DependsOn:
- AnalyticsGlueRole
- AnalysisGlueDatabase
AnalyticsAthenaWorkGroup:
Type: AWS::Athena::WorkGroup
Properties:
Name: ${self:service}-${self:provider.stage}-wg
WorkGroupConfiguration:
ResultConfiguration:
OutputLocation:
!Join
- ''
- - 's3://'
- !Ref S3AthenaStore
DependsOn:
- S3AthenaStore
The data is the folders with the following pattern: ${bucket}/${year}/${month}/${date}/${hour}/event-collection-stream-staging-deliver-1-2022-07-14-23-51-22-cdb2f06a-e825-47d0-a781-efd4195ab88d.gz and it looks like:
{"anonymous_id":"123","url":"-","event_type":"pageView","timestamp":"2022-07-12T03:29:47.186Z","source_ip":"69.113.177.222","user_agent":"curl/7.54.0"} {"anonymous_id":"123","url":"-","event_type":"pageView","timestamp":"2022-07-12T03:29:50.726Z","source_ip":"69.113.177.222","user_agent":"curl/7.54.0"} {"anonymous_id":"123","url":"-","event_type":"pageView","timestamp":"2022-07-12T03:29:53.628Z","source_ip":"69.113.177.222","user_agent":"curl/7.54.0"}
My question is - how come my data is automatically partitioned in Athena? When I run: select * from page_view_store_staging, it returns: my columns, plus columns for four (4) partitions 0-3 with column partition_0 having a value of 2022 etc.
I did not specify this in my config, did I?