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planbuilder: Fix infinite recursion for subqueries #13783

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merged 1 commit into from
Aug 14, 2023
Merged

planbuilder: Fix infinite recursion for subqueries #13783

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2 changes: 2 additions & 0 deletions go/vt/vtgate/planbuilder/rewrite.go
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Original file line number Diff line number Diff line change
Expand Up @@ -88,6 +88,8 @@ func (r *rewriter) rewriteDown(cursor *sqlparser.Cursor) bool {
// replace the table name with the original table
tableName.Name = vindexTable.Name
node.Expr = tableName
case *sqlparser.ExtractedSubquery:
return false
case *sqlparser.Subquery:
err := rewriteSubquery(cursor, r, node)
if err != nil {
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19 changes: 19 additions & 0 deletions go/vt/vtgate/planbuilder/testdata/info_schema80_cases.json
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Original file line number Diff line number Diff line change
Expand Up @@ -1693,5 +1693,24 @@
"Table": "information_schema.apa"
}
}
},
{
"comment": "mysqldump query",
"query": "SELECT LOGFILE_GROUP_NAME, FILE_NAME, TOTAL_EXTENTS, INITIAL_SIZE, ENGINE, EXTRA FROM INFORMATION_SCHEMA.FILES WHERE ENGINE = 'ndbcluster' AND FILE_TYPE = 'UNDO LOG' AND FILE_NAME IS NOT NULL AND LOGFILE_GROUP_NAME IS NOT NULL AND LOGFILE_GROUP_NAME IN (SELECT DISTINCT LOGFILE_GROUP_NAME FROM INFORMATION_SCHEMA.FILES WHERE ENGINE = 'ndbcluster' AND FILE_TYPE = 'DATAFILE' AND TABLESPACE_NAME IN (SELECT DISTINCT TABLESPACE_NAME FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_SCHEMA IN ('commerce'))) GROUP BY LOGFILE_GROUP_NAME, FILE_NAME, ENGINE, TOTAL_EXTENTS, INITIAL_SIZE ORDER BY LOGFILE_GROUP_NAME",
"plan": {
"QueryType": "SELECT",
"Original": "SELECT LOGFILE_GROUP_NAME, FILE_NAME, TOTAL_EXTENTS, INITIAL_SIZE, ENGINE, EXTRA FROM INFORMATION_SCHEMA.FILES WHERE ENGINE = 'ndbcluster' AND FILE_TYPE = 'UNDO LOG' AND FILE_NAME IS NOT NULL AND LOGFILE_GROUP_NAME IS NOT NULL AND LOGFILE_GROUP_NAME IN (SELECT DISTINCT LOGFILE_GROUP_NAME FROM INFORMATION_SCHEMA.FILES WHERE ENGINE = 'ndbcluster' AND FILE_TYPE = 'DATAFILE' AND TABLESPACE_NAME IN (SELECT DISTINCT TABLESPACE_NAME FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_SCHEMA IN ('commerce'))) GROUP BY LOGFILE_GROUP_NAME, FILE_NAME, ENGINE, TOTAL_EXTENTS, INITIAL_SIZE ORDER BY LOGFILE_GROUP_NAME",
"Instructions": {
"OperatorType": "Route",
"Variant": "DBA",
"Keyspace": {
"Name": "main",
"Sharded": false
},
"FieldQuery": "select LOGFILE_GROUP_NAME, FILE_NAME, TOTAL_EXTENTS, INITIAL_SIZE, `ENGINE`, EXTRA from INFORMATION_SCHEMA.FILES where 1 != 1 group by LOGFILE_GROUP_NAME, FILE_NAME, `ENGINE`, TOTAL_EXTENTS, INITIAL_SIZE",
"Query": "select LOGFILE_GROUP_NAME, FILE_NAME, TOTAL_EXTENTS, INITIAL_SIZE, `ENGINE`, EXTRA from INFORMATION_SCHEMA.FILES where `ENGINE` = 'ndbcluster' and FILE_TYPE = 'UNDO LOG' and FILE_NAME is not null and LOGFILE_GROUP_NAME is not null and LOGFILE_GROUP_NAME in (select distinct LOGFILE_GROUP_NAME from INFORMATION_SCHEMA.FILES where `ENGINE` = 'ndbcluster' and FILE_TYPE = 'DATAFILE' and TABLESPACE_NAME in (select distinct TABLESPACE_NAME from INFORMATION_SCHEMA.`PARTITIONS` where TABLE_SCHEMA in ('commerce'))) group by LOGFILE_GROUP_NAME, FILE_NAME, `ENGINE`, TOTAL_EXTENTS, INITIAL_SIZE order by LOGFILE_GROUP_NAME asc",
"Table": "INFORMATION_SCHEMA.FILES"
}
}
}
]