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Posted to issues@drill.apache.org by "Jacques Nadeau (JIRA)" <ji...@apache.org> on 2015/01/04 22:27:39 UTC
[jira] [Updated] (DRILL-1677) Table aliases are not shown in the
Scan node of Explain plan
[ 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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