Chris Atkinson created CALCITE-1153:
---------------------------------------
Summary: Invalid cast created during SQL Join in Oracle
Key: CALCITE-1153
URL: https://issues.apache.org/jira/browse/CALCITE-1153
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.7.0
Reporter: Chris Atkinson
Assignee: Julian Hyde
Fix For: next
The code generates a casts to ensure a match in varchar length during a join
(in Oracle SQL this explicit cast is not required but that's a different issue):
create table myschema.a_table(
description varchar2(10)
);
create table myschema.b_table(
description20 varchar2(20)
);
When the join is attempted
0: jdbc:drill:zk=local> select *
. . . . . . . . . . . > from utd_utpdba.UTPDBA.A_TABLE
. . . . . . . . . . . > inner join utd_utpdba.UTPDBA.B_TABLE
. . . . . . . . . . . > on A_TABLE.DESCRIPTION = B_TABLE.DESCRIPTION20;
The following CAST pattern is not acceptable to Oracle (11.2)
Error: DATA_READ ERROR: The JDBC storage plugin failed while trying setup
the SQL query.
sql SELECT *
FROM (SELECT "DESCRIPTION", CAST("DESCRIPTION" AS VARCHAR(20) CHARACTER SET
"ISO-8859-1") "$f2"
FROM "UTPDBA"."A_TABLE") "t"
INNER JOIN "UTPDBA"."B_TABLE" ON "t"."$f2" = "B_TABLE"."DESCRIPTION20"
plugin utd_utpdba
Fragment 0:0
[Error Id: 2f9a1975-fa57-4b07-8642-4dca3d03ae39 on x.x.x.x:31010]
(java.sql.SQLSyntaxErrorException) ORA-00907: missing right parenthesis
oracle.jdbc.driver.T4CTTIoer.processError():450
....
java.lang.Thread.run():745 (state=,code=0)
Discovered this in Drill:
drill/contrib/storage-jdbc/src/main/java/org/apache/drill/exec/store/jdbc/JdbcPrel.java:
...
org.apache.calcite.adapter.jdbc.JdbcImplementor
...
public JdbcPrel(...){...
final SqlDialect dialect = convention.getPlugin().getDialect();
final JdbcImplementor jdbcImplementor = new JdbcImplementor(
dialect,
(JavaTypeFactory) getCluster().getTypeFactory());
final JdbcImplementor.Result result =
jdbcImplementor.visitChild(0, input.accept(new SubsetRemover()));
sql = result.asQuery().toSqlString(dialect).getSql();
...}
The following is still applicable... the cast isn't valid for Oracle SQL:
I'm trying to join two VARCHAR2 columns of differing length. The generate
SQL casts the shorter to match the longer.
create table myschema.a_table(
description varchar2(10)
);
create table myschema.b_table(
description20 varchar2(20)
);
When the join is attempted
0: jdbc:drill:zk=local> select *
. . . . . . . . . . . > from utd_utpdba.UTPDBA.A_TABLE
. . . . . . . . . . . > inner join utd_utpdba.UTPDBA.B_TABLE
. . . . . . . . . . . > on A_TABLE.DESCRIPTION = B_TABLE.DESCRIPTION20;
The following CAST pattern is not acceptable to Oracle (11.2)
Error: DATA_READ ERROR: The JDBC storage plugin failed while trying setup
the SQL query.
sql SELECT *
FROM (SELECT "DESCRIPTION", CAST("DESCRIPTION" AS VARCHAR(20) CHARACTER SET
"ISO-8859-1") "$f2"
FROM "UTPDBA"."A_TABLE") "t"
INNER JOIN "UTPDBA"."B_TABLE" ON "t"."$f2" = "B_TABLE"."DESCRIPTION20"
plugin utd_utpdba
Fragment 0:0
[Error Id: 2f9a1975-fa57-4b07-8642-4dca3d03ae39 on x.x.x.x:31010]
(java.sql.SQLSyntaxErrorException) ORA-00907: missing right parenthesis
oracle.jdbc.driver.T4CTTIoer.processError():450
....
java.lang.Thread.run():745 (state=,code=0)
Specifically, CHARACTER SET "ISO-8859-1" is not allowed in the cast
statement:
*CAST*({ expr | *MULTISET* (subquery) } *AS* type_name)
https://docs.oracle.com/cd/B28359_01/server.111/b28286/functions016.htm
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