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Date: Sun, 4 Jan 2015 21:27:39 +0000 (UTC)
From: "Jacques Nadeau (JIRA)" <jira@apache.org>
To: issues@drill.apache.org
Message-ID: <JIRA.12754265.1415657649000.6056.1420406859057@Atlassian.JIRA>
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 <JIRA.12754265.1415657649575@arcas>
Subject: [jira] [Updated] (DRILL-1677) Table aliases are not shown in the
 Scan node of Explain plan
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     [ https://issues.apache.org/jira/browse/DRILL-1677?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jacques Nadeau updated DRILL-1677:
----------------------------------
    Issue Type: Improvement  (was: Bug)

> 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: Improvement
>          Components: Query Planning & Optimization
>    Affects Versions: 0.6.0
>            Reporter: Aman Sinha
>            Assignee: Mehant Baid
>             Fix For: 1.0.0
>
>
> 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}


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