DB2 - Problem description
Problem IT24301 | Status: Closed |
QUERY COMPILATION RETURNS SQLCODE -901 "PULLDOWN ATTEMPTED ON A COLUMN WITH NO HXP" | |
product: | |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 | |
Problem description: | |
Query compilation may fail with SQLCODE -901, reason "Pulldown attempted on a column with no hxp". This can happen when the query has the following characteristics: - multiple scalar-fullselects with the same source table - the ROWNUM pseudocolumn is referenced in a predicate or FETCH FIRST n ROWS ONLY For example: SELECT ( SELECT T1.C1 FROM T1 ), ( SELECT T1.C2 FROM T1 ) FROM T2 where ROWNUM = 1 order by T2.C1; SQL0901N The SQL statement or command failed because of a database system error. (Reason "Pulldown attempted on a column with no hxp".) SQLSTATE=58004 | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * ALL DB2 LUW Users * **************************************************************** * PROBLEM DESCRIPTION: * * Query compilation may fail with SQLCODE -901, reason * * "Pulldown * * attempted on a column with no hxp". This can happen when * * the * * query has the following characteristics: * * * * - multiple scalar-fullselects with the same source table * * - the ROWNUM pseudocolumn is referenced in a predicate * * * * For example: * * * * SELECT * * ( SELECT T1.C1 FROM T1 ), * * ( SELECT T1.C2 FROM T1 ) * * FROM T2 * * where ROWNUM = 1 * * order by T2.C1; * * * * SQL0901N The SQL statement or command failed because of a * * database system * * error. (Reason "Pulldown attempted on a column with no * * hxp".) * * SQLSTATE=58004 * **************************************************************** * RECOMMENDATION: * * Will be fixed in future fixpacks * **************************************************************** | |
Local Fix: | |
Solution | |
Workaround | |
Replace the ROWNUM predicate with an equivalent fetch-first-clause, e.g.: SELECT ( SELECT T1.C1 FROM T1 ), ( SELECT T1.C2 FROM T1 ) FROM T2 order by T2.C1 FETCH FIRST 1 ROW ONLY; | |
BUG-Tracking | |
forerunner : follow-up : IT30741 IT30742 | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 06.03.2018 17.12.2019 22.04.2020 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |