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Jiajun Xie commented on CALCITE-5583: ------------------------------------- [~leepb] , Thank you for your PR. I have left some comments. > JDBC adapter generates 'SELECT *', which is invalid SQL if there are > duplicate column names > ------------------------------------------------------------------------------------------- > > Key: CALCITE-5583 > URL: https://issues.apache.org/jira/browse/CALCITE-5583 > Project: Calcite > Issue Type: Bug > Reporter: libopeng > Priority: Major > Labels: pull-request-available > Time Spent: 10m > Remaining Estimate: 0h > > JDBC adapter generates 'SELECT *', which is invalid SQL if there are > duplicate column names > {code:java} > LogicalProject(c0=[$0], c00=[$1]) > LogicalJoin(condition=[=($0, $1)], joinType=[inner]) > LogicalProject(c0=[$0]) > LogicalTableScan(table=[[scott, EMP]]) > LogicalProject(c0=[$0]) > LogicalTableScan(table=[[scott, EMP]]){code} > to sql > {code:java} > SELECT * > FROM (SELECT "EMPNO" AS "c0" > FROM "scott"."EMP") AS "t" > INNER JOIN (SELECT "EMPNO" AS "c0" > FROM "scott"."EMP") AS "t0" ON "t"."c0" = "t0"."c0" {code} > When this sql is a subquery, it can be wrong > {code:java} > select * > from "EMPNO" t1 > left join ( > SELECT * FROM (SELECT "EMPNO" AS "c0" FROM "scott"."EMP") AS "t" INNER JOIN > (SELECT "EMPNO" AS "c0" FROM "scott"."EMP") AS "t0" ON "t"."c0" = "t0"."c0" > ) t2 > on t1.EMPNO=t2."c0"{code} > {color:#ff0000}fault: 'column reference "c0" is ambiguous' error when > executing in postgresql{color} > > > > -- This message was sent by Atlassian Jira (v8.20.10#820010)