Volodymyr Vysotskyi created DRILL-7340:
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Summary: Filter is not pushed to JDBC database when several
databases are used in the query
Key: DRILL-7340
URL: https://issues.apache.org/jira/browse/DRILL-7340
Project: Apache Drill
Issue Type: Bug
Components: Storage - JDBC
Affects Versions: 1.16.0
Reporter: Volodymyr Vysotskyi
Fix For: Future
For the case when several databases are used in the query, some rules weren'tÂ
added to the rule set for one of the conventions. It is observed in queries
similar to the next query:
{code:sql}
select * from mysql.`drill_mysql_test`.person t1
INNER JOIN h2.drill_h2_test.person t2 on t1.person_id = t2.person_id where
t1.first_name = 'first_name_1' and t2.last_name = 'last_name_1
{code}
Plan for this query is the following:
{noformat}
00-00 Screen
00-01 Project(person_id=[$0], first_name=[$1], last_name=[$2],
address=[$3], city=[$4], state=[$5], zip=[$6], json=[$7], bigint_field=[$8],
smallint_field=[$9], numeric_field=[$10], boolean_field=[$11],
double_field=[$12], float_field=[$13], real_field=[$14], time_field=[$15],
timestamp_field=[$16], date_field=[$17], datetime_field=[$18],
year_field=[$19], text_field=[$20], tiny_text_field=[$21],
medium_text_field=[$22], long_text_field=[$23], blob_field=[$24],
bit_field=[$25], enum_field=[$26], PERSON_ID0=[$27], FIRST_NAME0=[$28],
LAST_NAME0=[$29], ADDRESS0=[$30], CITY0=[$31], STATE0=[$32], ZIP0=[$33],
JSON0=[$34], BIGINT_FIELD0=[$35], SMALLINT_FIELD0=[$36], NUMERIC_FIELD0=[$37],
BOOLEAN_FIELD0=[$38], DOUBLE_FIELD0=[$39], FLOAT_FIELD0=[$40],
REAL_FIELD0=[$41], TIME_FIELD0=[$42], TIMESTAMP_FIELD0=[$43],
DATE_FIELD0=[$44], CLOB_FIELD=[$45])
00-02 HashJoin(condition=[=($0, $27)], joinType=[inner], semi-join:
=[false])
00-03 Project(PERSON_ID0=[$0], FIRST_NAME0=[$1], LAST_NAME0=[$2],
ADDRESS0=[$3], CITY0=[$4], STATE0=[$5], ZIP0=[$6], JSON0=[$7],
BIGINT_FIELD0=[$8], SMALLINT_FIELD0=[$9], NUMERIC_FIELD0=[$10],
BOOLEAN_FIELD0=[$11], DOUBLE_FIELD0=[$12], FLOAT_FIELD0=[$13],
REAL_FIELD0=[$14], TIME_FIELD0=[$15], TIMESTAMP_FIELD0=[$16],
DATE_FIELD0=[$17], CLOB_FIELD=[$18])
00-05 SelectionVectorRemover
00-06 Filter(condition=[=($2, 'last_name_1')])
00-07 Jdbc(sql=[SELECT * FROM "TMP"."DRILL_H2_TEST"."PERSON" ])
00-04 Jdbc(sql=[SELECT * FROM `drill_mysql_test`.`person` WHERE
`first_name` = 'first_name_1' ])
{noformat}
{{DrillJdbcFilterRule}} wasn't applied for H2 convention and Filter wasn't
pushed to H2 database.
This issue may be fixed by specifying {{JdbcConvention}} in rules descriptions
in Drill {{DrillJdbcFilterRule}} and {{DrillJdbcProjectRule}} rules and other
rules should be fixed in Calcite in the scope of CALCITE-3115.
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