Paul Rogers created IMPALA-7886:
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Summary: NumericLiteral constructor fails to round values to
Decimal type
Key: IMPALA-7886
URL: https://issues.apache.org/jira/browse/IMPALA-7886
Project: IMPALA
Issue Type: Bug
Components: Frontend
Affects Versions: Impala 3.0
Reporter: Paul Rogers
Assignee: Paul Rogers
According to the SQL spec, section 4.4, regarding numeric assignment:
bq. If least significant digits are lost, implementation defined rounding or
truncating occurs, with no exception condition being raised
When creating a {{NumericLiteral}} via the constructor, no rounding occurs. The
value has more precision than specified by the type.
Create a NumericLiteral and test it as follows:
{code:java}
NumericLiteral n = new NumericLiteral(new BigDecimal("1.567"),
ScalarType.createDecimalType(2, 1));
assertEquals(ScalarType.createDecimalType(2, 1), n.getType());
assertEquals("1.6", n.getValue().toString());
{code}
The above test fails because the value in the literal is “1.567”, it has not
been rounded to fit the type of the literal as required by the SQL standard.
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