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https://issues.apache.org/jira/browse/SPARK-5456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14387904#comment-14387904
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Kuldeep commented on SPARK-5456:
--------------------------------
[~karthikg01]
1) Switch to hive context, I am not trying to deride the plain sql context, but
the hive context is just better tested and has a well defined syntax borrowed
from hive.
2) Even in hive context i have faced problems with bigdecimals, so like your
workaround i also convert bigdecimals to a double (not int). And for all
practical purposes it is more than enough. I have not seem many datasources
with those types. rdbms maps `NUMERIC` type to bigdecimal in jdbc but you can
always workaround this by have a simple map transformation before you register
it to sql context.
2 cents.
> Decimal Type comparison issue
> -----------------------------
>
> Key: SPARK-5456
> URL: https://issues.apache.org/jira/browse/SPARK-5456
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.2.0, 1.3.0
> Reporter: Kuldeep
>
> Not quite able to figure this out but here is a junit test to reproduce this,
> in JavaAPISuite.java
> {code:title=DecimalBug.java}
> @Test
> public void decimalQueryTest() {
> List<Row> decimalTable = new ArrayList<Row>();
> decimalTable.add(RowFactory.create(new BigDecimal("1"), new
> BigDecimal("2")));
> decimalTable.add(RowFactory.create(new BigDecimal("3"), new
> BigDecimal("4")));
> JavaRDD<Row> rows = sc.parallelize(decimalTable);
> List<StructField> fields = new ArrayList<StructField>(7);
> fields.add(DataTypes.createStructField("a",
> DataTypes.createDecimalType(), true));
> fields.add(DataTypes.createStructField("b",
> DataTypes.createDecimalType(), true));
> sqlContext.applySchema(rows.rdd(),
> DataTypes.createStructType(fields)).registerTempTable("foo");
> Assert.assertEquals(sqlContext.sql("select * from foo where a >
> 0").collectAsList(), decimalTable);
> }
> {code}
> Fails with
> java.lang.ClassCastException: java.math.BigDecimal cannot be cast to
> org.apache.spark.sql.types.Decimal
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