diff options
Diffstat (limited to 'sql/migrations/2019-12-19-060141_init')
| -rw-r--r-- | sql/migrations/2019-12-19-060141_init/up.sql | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sql/migrations/2019-12-19-060141_init/up.sql b/sql/migrations/2019-12-19-060141_init/up.sql index 12ed409..0b2b19c 100644 --- a/sql/migrations/2019-12-19-060141_init/up.sql +++ b/sql/migrations/2019-12-19-060141_init/up.sql @@ -1,10 +1,24 @@ +-- rows *may* be revisit records; indicated by mimetype == "warc/revisit" +-- records are implied to be 200 status (or 226 for ftp); either direct hits or +-- revisits +-- there is nothing to prevent duplicate hits. eg, same sha1, same url, many +-- datetimes. import scripts should take efforts to reduce this sort of +-- duplication though. one row per *domain*/sha1hex pair is a good guideline. +-- all ingest result url/dt pairs should be included though. +-- any mimetype is allowed, but presumption should be that actual body is full +-- manifestation of a work. AKA, no landing pages, no webcapture HTML (each +-- only a part of work). URLs that are parts of a fileset are allowed. CREATE TABLE IF NOT EXISTS cdx ( url TEXT NOT NULL CHECK (octet_length(url) >= 1), datetime TEXT NOT NULL CHECK (octet_length(datetime) = 14), + -- sha1hex/cdx_sha1hex difference is intended to help with difference between + -- CDX hash (which is transport encoded body) vs. actual body. Probably need to + -- include both for all records? sha1hex TEXT NOT NULL CHECK (octet_length(sha1hex) = 40), cdx_sha1hex TEXT CHECK (octet_length(cdx_sha1hex) = 40), mimetype TEXT CHECK (octet_length(mimetype) >= 1), + -- TODO: enforce that only paths with '/' (item+file) should be included? warc_path TEXT CHECK (octet_length(warc_path) >= 1), warc_csize BIGINT, warc_offset BIGINT, @@ -12,8 +26,10 @@ CREATE TABLE IF NOT EXISTS cdx ( PRIMARY KEY(url, datetime) ); CREATE INDEX IF NOT EXISTS cdx_sha1hex_idx ON cdx(sha1hex); +-- TODO: remove this index? not currently used CREATE INDEX IF NOT EXISTS cdx_row_created_idx ON cdx(row_created); +-- TODO: require all fields. if mimetype unknown, should be octet-stream CREATE TABLE IF NOT EXISTS file_meta ( sha1hex TEXT PRIMARY KEY CHECK (octet_length(sha1hex) = 40), sha256hex TEXT CHECK (octet_length(sha256hex) = 64), |