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-rw-r--r--sql/README.md47
-rw-r--r--sql/example.env1
2 files changed, 48 insertions, 0 deletions
diff --git a/sql/README.md b/sql/README.md
index b171614..38052fd 100644
--- a/sql/README.md
+++ b/sql/README.md
@@ -5,6 +5,21 @@ No primary storage of anything in this table. Everything should be rapidly
re-creatable from dumps, kafka topics (compressed), CDX, petabox metadata, etc.
This is a secondary view on all of that.
+## Create Database and User
+
+Create system user with your username like:
+
+ sudo su postgres
+ createuser -s bnewbold
+
+Create database using `diesel` tool (see fatcat rust docs for install notes):
+
+ # DANGER: will delete/recreate entire database
+ diesel database reset
+
+In the future would probably be better to create a real role/password and
+supply these via `DATABASE_URL` env variable.
+
## Schema
schema/database name is 'sandcrawler'
@@ -124,3 +139,35 @@ Questions we might want to answer
http get :3030/cdx?url=eq.https://coleccionables.mercadolibre.com.ar/arduino-pdf_Installments_NoInterest_BestSellers_YES
http get :3030/file_meta?sha1hex=eq.120582c855a7cc3c70a8527c560d7f27e6027278
+## Parse URLs
+
+One approach is to do regexes, something like:
+
+ SELECT substring(column_name FROM '[^/]+://([^/]+)/') AS domain_name FROM table_name;
+
+Eg:
+
+ SELECT DISTINCT(domain), COUNT(domain)
+ FROM (select substring(base_url FROM '[^/]+://([^/]*)') as domain FROM ingest_file_result) t1
+ WHERE t1.domain != ''
+ GROUP BY domain
+ ORDER BY COUNT DESC
+ LIMIT 10;
+
+Or:
+
+ SELECT domain, status, COUNT((domain, status))
+ FROM (SELECT status, substring(terminal_url FROM '[^/]+://([^/]*)') AS domain FROM ingest_file_result) t1
+ WHERE t1.domain != ''
+ AND t1.status != 'success'
+ GROUP BY domain, status
+ ORDER BY COUNT DESC
+ LIMIT 10;
+
+Can also do some quick lookups for a specific domain and protocol like:
+
+ SELECT *
+ FROM ingest_file_result
+ WHERE terminal_url LIKE 'https://insights.ovid.com/%'
+ LIMIT 10;
+
diff --git a/sql/example.env b/sql/example.env
new file mode 100644
index 0000000..3a13689
--- /dev/null
+++ b/sql/example.env
@@ -0,0 +1 @@
+DATABASE_URL="postgres://fatcat:tactaf@localhost/sandcrawler"