drill-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-1677) Table aliases are not shown in the Scan node of Explain plan
Date Mon, 10 Nov 2014 22:14:35 GMT
Aman Sinha created DRILL-1677:
---------------------------------

             Summary: Table aliases are not shown in the Scan node of Explain plan
                 Key: DRILL-1677
                 URL: https://issues.apache.org/jira/browse/DRILL-1677
             Project: Apache Drill
          Issue Type: Bug
          Components: Query Planning & Optimization
    Affects Versions: 0.6.0
            Reporter: Aman Sinha


Table aliases don't show up in the Scan node of Explain plan - either the Text plan or the
JSON version.  We certainly need this for analyzing plans.  

{code: sql}
0: jdbc:drill:zk=local> explain plan for select count(*) from cp.`tpch/nation.parquet`
n1, cp.`tpch/nation.parquet` n2, cp.`tpch/nation.parquet` n3 where n1.n_nationkey = n2.n_nationkey
and n2.n_regionkey = n3.n_regionkey;
+------------+------------+
|    text    |    json    |
+------------+------------+
| 00-00    Screen
00-01      StreamAgg(group=[{}], EXPR$0=[COUNT()])
00-02        Project($f0=[0])
00-03          HashJoin(condition=[=($0, $1)], joinType=[inner])
00-05            Project(n_regionkey0=[$2])
00-06              HashJoin(condition=[=($0, $1)], joinType=[inner])
00-08                Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=/tpch/nation.parquet]],
selectionRoot=/tpch/nation.parquet, numFiles=1, columns=[SchemaPath [`n_nationkey`]]]])
00-07                Project(n_nationkey0=[$0], n_regionkey=[$1])
00-09                  Project(n_nationkey=[$1], n_regionkey=[$0])
00-10                    Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=/tpch/nation.parquet]],
selectionRoot=/tpch/nation.parquet, numFiles=1, columns=[SchemaPath [`n_nationkey`], SchemaPath
[`n_regionkey`]]]])
00-04            Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=/tpch/nation.parquet]],
selectionRoot=/tpch/nation.parquet, numFiles=1, columns=[SchemaPath [`n_regionkey`]]]])
 | {
  "head" : {
    "version" : 1,
    "generator" : {
      "type" : "ExplainHandler",
      "info" : ""
    },
    "type" : "APACHE_DRILL_PHYSICAL",
    "options" : [ ],
    "queue" : 0,
    "resultMode" : "EXEC"
  },
  "graph" : [ {
    "pop" : "parquet-scan",
    "@id" : 4,
    "entries" : [ {
      "path" : "/tpch/nation.parquet"
    } ],
    "storage" : {
      "type" : "file",
      "enabled" : true,
      "connection" : "classpath:///",
      "workspaces" : null,
      "formats" : {
        "csv" : {
          "type" : "text",
          "extensions" : [ "csv" ],
          "delimiter" : ","
        },
        "json" : {
          "type" : "json"
        },
        "parquet" : {
          "type" : "parquet"
        }
      }
    },
    "format" : {
      "type" : "parquet"
    },
    "columns" : [ "`n_regionkey`" ],
    "selectionRoot" : "/tpch/nation.parquet",
    "cost" : 25.0
  }, {
    "pop" : "parquet-scan",
    "@id" : 8,
    "entries" : [ {
      "path" : "/tpch/nation.parquet"
    } ],
    "storage" : {
      "type" : "file",
      "enabled" : true,
      "connection" : "classpath:///",
      "workspaces" : null,
      "formats" : {
        "csv" : {
          "type" : "text",
          "extensions" : [ "csv" ],
          "delimiter" : ","
        },
        "json" : {
          "type" : "json"
        },
        "parquet" : {
          "type" : "parquet"
        }
      }
    },
    "format" : {
      "type" : "parquet"
    },
    "columns" : [ "`n_nationkey`" ],
    "selectionRoot" : "/tpch/nation.parquet",
    "cost" : 25.0
  }, {
    "pop" : "parquet-scan",
    "@id" : 10,
    "entries" : [ {
      "path" : "/tpch/nation.parquet"
    } ],
    "storage" : {
      "type" : "file",
      "enabled" : true,
      "connection" : "classpath:///",
      "workspaces" : null,
      "formats" : {
        "csv" : {
          "type" : "text",
          "extensions" : [ "csv" ],
          "delimiter" : ","
        },
        "json" : {
          "type" : "json"
        },
        "parquet" : {
          "type" : "parquet"
        }
      }
    },
    "format" : {
      "type" : "parquet"
    },
    "columns" : [ "`n_nationkey`", "`n_regionkey`" ],
    "selectionRoot" : "/tpch/nation.parquet",
    "cost" : 25.0
  }, {
    "pop" : "project",
    "@id" : 9,
    "exprs" : [ {
      "ref" : "`n_nationkey`",
      "expr" : "`n_nationkey`"
    }, {
      "ref" : "`n_regionkey`",
      "expr" : "`n_regionkey`"
    } ],
    "child" : 10,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 25.0
  }, {
    "pop" : "project",
    "@id" : 7,
    "exprs" : [ {
      "ref" : "`n_nationkey0`",
      "expr" : "`n_nationkey`"
    }, {
      "ref" : "`n_regionkey`",
      "expr" : "`n_regionkey`"
    } ],
    "child" : 9,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 25.0
  }, {
    "pop" : "hash-join",
    "@id" : 6,
    "left" : 8,
    "right" : 7,
    "conditions" : [ {
      "relationship" : "==",
      "left" : "`n_nationkey`",
      "right" : "`n_nationkey0`"
    } ],
    "joinType" : "INNER",
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 25.0
  }, {
    "pop" : "project",
    "@id" : 5,
    "exprs" : [ {
      "ref" : "`n_regionkey0`",
      "expr" : "`n_regionkey`"
    } ],
    "child" : 6,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 25.0
  }, {
    "pop" : "hash-join",
    "@id" : 3,
    "left" : 5,
    "right" : 4,
    "conditions" : [ {
      "relationship" : "==",
      "left" : "`n_regionkey0`",
      "right" : "`n_regionkey`"
    } ],
    "joinType" : "INNER",
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 25.0
  }, {
    "pop" : "project",
    "@id" : 2,
    "exprs" : [ {
      "ref" : "`$f0`",
      "expr" : "0"
    } ],
    "child" : 3,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 25.0
  }, {
    "pop" : "streaming-aggregate",
    "@id" : 1,
    "child" : 2,
    "keys" : [ ],
    "exprs" : [ {
      "ref" : "`EXPR$0`",
      "expr" : "count(1) "
    } ],
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 1.0
  }, {
    "pop" : "screen",
    "@id" : 0,
    "child" : 1,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 2.5
  } ]
} |
{code}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message