Replacement for row_number() in clickhouse

Question

Row_number () is not supported by clickhouse database, looking for a alternate function.

SELECT company_name AS company,
       DOMAIN,
       city_name AS city,
       state_province_code AS state,
       country_code AS country,
       location_revenue AS revenueRange,
       location_TI_industry AS industry,
       location_employeecount_range AS employeeSize,
       topic,
       location_duns AS duns,
       rank AS intensityRank,
       dnb_status_code AS locationStatus,
       rank_delta AS intensityRankDelta,
       company_id,
       ROW_NUMBER() OVER (PARTITION BY DOMAIN) AS rowNumberFROM company_intent c
 WHERE c.rank > 0
   AND c.rank <= 10
   AND c.signal_count > 0
   AND c.topic IN ('Cloud Computing')
   AND c.country_code = 'US'
   AND c.rank IN (7, 8, 9, 10)
 GROUP BY c.location_duns,
          company_name,
          DOMAIN,
          city_name,
          state_province_code,
          country_code,
          location_revenue,
          location_TI_industry,
          location_employeecount_range,
          topic,
          rank,
          dnb_status_code,
          rank_delta,
          company_id
 ORDER BY intensityRank DESC
 LIMIT 15 SELECT COUNT (DISTINCT c.company_id) AS COUNT
  FROM company_intent c
 WHERE c.rank > 0
   AND c.rank <= 10
   AND c.signal_count > 0
   AND c.topic IN ('Cloud Computing')
   AND c.country_code = 'US'
   AND c.rank IN (7, 8, 9, 10)

When executed the above query got the below error.

Expected one of: SETTINGS, FORMAT, WITH, HAVING, LIMIT, FROM, PREWHERE, token, UNION ALL, Comma, WHERE, ORDER BY, INTO OUTFILE, GROUP BY

any suggestions is appreciated

Answer 1

ClickHouse doesn't support Window Functions for now. There is a rowNumberInAllBlocks function that might be interesting to you.

Answer 2

SELECT
    *,
    rowNumberInAllBlocks()
FROM
    (
        -- YOUR SELECT HERE
    )

https://clickhouse-docs.readthedocs.io/en/latest/functions/other_functions.html says:

rowNumberInAllBlocks() Returns an incremental row number within all blocks that were processed by this function.

Answer 3

smth like this (terrible lokks but works good)

SELECT *, rn +1 -min_rn current, max_rn - min_rn + 1 last FROM (
SELECT *, rowNumberInAllBlocks() rn FROM (
SELECT i_device, i_time
FROM tbl
ORDER BY i_device, i_time
) t
) t1 LEFT JOIN (
SELECT i_device, min(rn) min_rn, max(rn) max_rn FROM (
SELECT *, rowNumberInAllBlocks() rn FROM (
SELECT i_device, i_time
FROM tbl
ORDER BY i_device, i_time
) t
) t GROUP BY i_device
) t2 USING (i_device)

Answer 4

SELECT *, rowNumberInAllBlocks() as row_count FROM (SELECT .....)