ReddRadar
Agent skill
trino
TD Trino SQL with TD-specific functions (td_interval, td_time_range, td_time_string, td_sessionize). Use for time-based filtering, partition pruning, and TD query patterns.
Install this agent skill to your Project
npx add-skill https://github.com/treasure-data/td-skills/tree/main/sql-skills/trino
SKILL.md
TD Trino SQL
TD Time Functions
td_interval (Recommended for relative time)
where td_interval(time, '-1d', 'JST') -- Yesterday (JST)
where td_interval(time, '-1d') -- Yesterday (UTC)
where td_interval(time, '-1w', 'JST') -- Previous week
where td_interval(time, '-1M', 'JST') -- Previous month
where td_interval(time, '-1d/-1d', 'JST') -- 2 days ago
where td_interval(time, '-1M/-2M', 'JST') -- 3 months ago
Timezone is optional (defaults to UTC).
Note: Cannot use td_scheduled_time() as first arg. Include td_scheduled_time() elsewhere in query to establish reference date.
td_time_range (Explicit dates)
where td_time_range(time, '2024-01-01', '2024-01-31')
where td_time_range(time, td_time_add(td_scheduled_time(), '-7d'), td_scheduled_time())
td_time_string (Display formatting)
td_time_string(time, 'd!') -- 2024-01-15 (UTC)
td_time_string(time, 'd!', 'JST') -- 2024-01-15 (JST)
td_time_string(time, 's!', 'JST') -- 2024-01-15 10:30:45
td_time_string(time, 'M!') -- 2024-01
td_time_string(time, 'h!') -- 2024-01-15 10
Format codes: y!=year, q!=quarter, M!=month, w!=week, d!=day, h!=hour, m!=minute, s!=second. Without the exclamation mark, includes timezone offset. Timezone is optional (defaults to UTC).
Use for display only, never for filtering:
- Good:
select td_time_string(time, 'd!', 'JST') as date - Bad:
where td_time_string(time, 'd!', 'JST') = '2024-01-01'
td_time_format (Legacy)
td_time_format(time, 'yyyy-MM-dd HH:mm:ss', 'JST')
td_sessionize
select td_sessionize(time, 1800, user_id) as session_id -- 30min timeout
from events
Table Format
select * from database_name.table_name
where td_interval(time, '-1d', 'JST')
Performance
Always include time filters for partition pruning:
-- Good: Partition pruning
where td_time_range(time, '2024-01-01', '2024-01-02')
-- Bad: Full table scan
where event_type = 'click' -- Missing time filter!
Use approx_distinct() and approx_percentile() for large datasets.
Common Errors
| Error | Fix |
|---|---|
| Query exceeded memory limit | Add time filters, use approx_ functions |
| Partition not found | Verify time range syntax |
Resources
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