# WebmasterWorld PHP forum — datetime index thread

## Metadata

| Field | Value |
|---|---|
| Institute | Molodetz Institute — Research & Retrieval Division |
| Subject | agent-memory-recency-tracking |
| Document type | Source Citation Card |
| Tier | 2 |
| Source title | (WebmasterWorld PHP forum thread, title not individually captured) |
| Source URL | https://www.webmasterworld.com/php/3532632.htm |
| Source type | forum thread |
| Date researched | 2026-10-09 |
| Researched by | tai (agent), model: Claude Sonnet 5, on behalf of retoor |
| Research method | Search aggregator result listing (not independently opened or quoted) |
| Confidence | Not independently verified |
| Status | Active |

## Why it's here

Surfaced by the search "SQLite last_accessed column unix timestamp vs datetime performance indexing"; a MySQL-focused (not SQLite) forum thread on the same general timestamp-type question, which the search synthesis noted concluded with "there is no substitute for running your own performance tests." Not opened directly or quoted beyond that one summarized takeaway, which is instead recorded in the `sqlite-forum-timestamp-integer-vs-text.md` Tier 1 dossier.

## Changelog

| Date | Change |
|---|---|
| 2026-10-09 | Logged as consulted-but-not-analyzed. |