[CARBONDATA-2541] MV Dataset - When MV satisfy filter condition but not exact same condition given during MV creation, then the user query is not accessing the data from MV.

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: data-query
• Labels: Carbondata MV Materialistic_Views
• Assignee: Bo Xu
• Reporter: Prasanna Ravichandran
• Created: 25/May/18 13:42
• Updated: 09/Jul/18 10:45

Description

MV Dataset - When MV satisfy filter condition but not exact same condition given during MV creation, then the user query is not accessing the data from MV.

Test queries - spark shell:

scala>carbon.sql("CREATE TABLE originTable (empno int, empname String, designation String, doj Timestamp, workgroupcategory int, workgroupcategoryname String, deptno int, deptname String, projectcode int, projectjoindate Timestamp, projectenddate Timestamp,attendance int, utilization int,salary int) STORED BY 'org.apache.carbondata.format'").show()
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scala>carbon.sql("LOAD DATA local inpath 'hdfs://hacluster/user/prasanna/data.csv' INTO TABLE originTable OPTIONS('DELIMITER'= ',', 'QUOTECHAR'= '\"','timestampformat'='dd-MM-yyyy')").show()
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scala> carbon.sql("create datamap mv_project3 using 'mv' as select projectenddate,empno from originTable where empno>10").show(200,false)
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scala> carbon.sql(" rebuild datamap mv_project3").show(200,false)
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scala> carbon.sql(" explain select projectenddate,empno from originTable where empno>15").show(200,false)
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plan

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== CarbonData Profiler == Table Scan on origintable total blocklets: 2 filter: (empno <> null and empno > 15) pruned by Main DataMap skipped blocklets: 0

== Physical Plan == *BatchedScan CarbonDatasourceHadoopRelation [ Database name :default, Table name :origintable, Schema :Some(StructType(StructField(empno,IntegerType,true), StructField(empname,StringType,true), StructField(designation,StringType,true), StructField(doj,TimestampType,true), StructField(workgroupcategory,IntegerType,true), StructField(workgroupcategoryname,StringType,true), StructField(deptno,IntegerType,true), StructField(deptname,StringType,true), StructField(projectcode,IntegerType,true), StructField(projectjoindate,TimestampType,true), StructField(projectenddate,TimestampType,true), StructField(attendance,IntegerType,true), StructField(utilization,IntegerType,true), StructField(salary,IntegerType,true))) ] default.origintableprojectenddate#3095,empno#3085 PushedFilters: [IsNotNull(empno), GreaterThan(empno,15)]

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Issue Links

• is a child of: CARBONDATA-2628 Fix MV defects