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Posted to issues@hawq.apache.org by "Amy (JIRA)" <ji...@apache.org> on 2017/02/16 06:35:41 UTC
[jira] [Assigned] (HAWQ-1339) Cache lookup failed after explain
OLAP grouping query
[ https://issues.apache.org/jira/browse/HAWQ-1339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Amy reassigned HAWQ-1339:
-------------------------
Assignee: Amy (was: Ed Espino)
> Cache lookup failed after explain OLAP grouping query
> -----------------------------------------------------
>
> Key: HAWQ-1339
> URL: https://issues.apache.org/jira/browse/HAWQ-1339
> Project: Apache HAWQ
> Issue Type: Bug
> Components: Catalog
> Reporter: Amy
> Assignee: Amy
> Fix For: 2.3.0.0-incubating
>
>
> Some OLAP grouping query may error out with "division by zero", and when do query explain, notice of "cache lookup failed for attribute 7 of relation 75036 (lsyscache.c:437)" occurred.
> '''
> postgres=# SELECT sale.vn,sale.cn,sale.dt,GROUPING(sale.vn), TO_CHAR(COALESCE(MAX(DISTINCT floor(sale.vn+sale.qty)),0),'99999999.9999999'),TO_CHAR(COALESCE(VAR_SAMP(floor(sale.pn/sale.prc)),0),'99999999.9999999'),TO_CHAR(COALESCE(COUNT(floor(sale.qty+sale.prc)),0),'99999999.9999999')
> postgres-# FROM sale,customer,vendor
> postgres-# WHERE sale.cn=customer.cn AND sale.vn=vendor.vn
> postgres-# GROUP BY ROLLUP((sale.prc),(sale.vn,sale.vn),(sale.pn,sale.pn),(sale.dt),(sale.qty,sale.vn,sale.qty)),ROLLUP((sale.pn),(sale.vn,sale.pn),(sale.qty)),(),sale.cn HAVING COALESCE(VAR_POP(sale.cn),0) >= 45.5839785564113;
> ERROR: division by zero (seg0 localhost:40000 pid=25205)
> postgres=#
> postgres=# explain SELECT sale.vn,sale.cn,sale.dt,GROUPING(sale.vn), TO_CHAR(COALESCE(MAX(DISTINCT floor '9 99. FROM sale,customer,vendor WHERE sale.cn=customer.cn AND sale.vn=vendor.vn GROUP BY ROLLUP((sale.prc),(sale.vn,sale.vn),(sale.pn,sale.pn),(sale.dt),(sale.qty,sale.vn,sale.qty)),ROLLUP((sale.pn),(sale.vn,sale.pn),(sale.qty)),(),sale.cn HAVING COALESCE(VAR_POP(sale.cn),0) >= 45.5839785564113;
> NOTICE: cache lookup failed for attribute 7 of relation 75036 (lsyscache.c:437)
> '''
> The reproduction steps are:
> '''
> Step 1: Prepare schema and data using attached olap_setup.sql
> Step 2: Run below OLAP grouping query
> -- OLAP query involving MAX() function
> SELECT sale.vn,sale.cn,sale.dt,GROUPING(sale.vn), TO_CHAR(COALESCE(MAX(DISTINCT floor(sale.vn+sale.qty)),0),'99999999.9999999'),TO_CHAR(COALESCE(VAR_SAMP(floor(sale.pn/sale.prc)),0),'99999999.9999999'),TO_CHAR(COALESCE(COUNT(floor(sale.qty+sale.prc)),0),'99999999.9999999')
> FROM sale,customer,vendor
> WHERE sale.cn=customer.cn AND sale.vn=vendor.vn
> GROUP BY ROLLUP((sale.prc),(sale.vn,sale.vn),(sale.pn,sale.pn),(sale.dt),(sale.qty,sale.vn,sale.qty)),ROLLUP((sale.pn),(sale.vn,sale.pn),(sale.qty)),(),sale.cn HAVING COALESCE(VAR_POP(sale.cn),0) >= 45.5839785564113;
> explain SELECT sale.vn,sale.cn,sale.dt,GROUPING(sale.vn), TO_CHAR(COALESCE(MAX(DISTINCT floor(sale.vn+sale.qty)),0),'99999999.9999999'),TO_CHAR(COALESCE(VAR_SAMP(floor(sale.pn/sale.prc)),0),'99999999.9999999'),TO_CHAR(COALESCE(COUNT(floor(sale.qty+sale.prc)),0),'99999999.9999999')
> FROM sale,customer,vendor
> WHERE sale.cn=customer.cn AND sale.vn=vendor.vn
> GROUP BY ROLLUP((sale.prc),(sale.vn,sale.vn),(sale.pn,sale.pn),(sale.dt),(sale.qty,sale.vn,sale.qty)),ROLLUP((sale.pn),(sale.vn,sale.pn),(sale.qty)),(),sale.cn HAVING COALESCE(VAR_POP(sale.cn),0) >= 45.5839785564113;
> '''
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