julianhyde commented on code in PR #3917:
URL: https://github.com/apache/calcite/pull/3917#discussion_r1720089643
##########
linq4j/src/main/java/org/apache/calcite/linq4j/tree/Primitive.java:
##########
@@ -477,28 +483,41 @@ static BigDecimal checkOverflow(BigDecimal value, int
precision, int scale) {
return checkOverflow(decimal, precision, scale);
}
+ public @Nullable Object numberValue(Number value) {
+ return numberValue(value, RoundingMode.DOWN);
+ }
/**
Review Comment:
need space between methods
##########
linq4j/src/main/java/org/apache/calcite/linq4j/tree/Primitive.java:
##########
@@ -384,9 +384,15 @@ static void checkRoundedRange(Number value, double min,
double max) {
}
}
+ /** Called from BuiltInMethod.INTEGER_CAST */
Review Comment:
javadoc is same as next method
if methods have the same description, are both required?
##########
core/src/main/java/org/apache/calcite/rex/RexExecutorImpl.java:
##########
@@ -56,11 +56,19 @@
public class RexExecutorImpl implements RexExecutor {
private final DataContext dataContext;
+ private final SqlConformance sqlConformance;
public RexExecutorImpl(DataContext dataContext) {
this.dataContext = dataContext;
+ this.sqlConformance = SqlConformanceEnum.DEFAULT;
Review Comment:
I don't think conformance belongs here. Conformance governs validation
behavior, not runtime behavior.
##########
core/src/test/java/org/apache/calcite/test/CoreQuidemTest.java:
##########
@@ -88,6 +88,33 @@ public static void main(String[] args) throws Exception {
SqlConformanceEnum.MYSQL_5)
.with(CalciteAssert.Config.SCOTT)
.connect();
+ case "scott-default":
+ // Same as "scott", but uses Calcite's default conformance.
+ return CalciteAssert.that()
+ .with(CalciteConnectionProperty.PARSER_FACTORY,
+ ExtensionDdlExecutor.class.getName() + "#PARSER_FACTORY")
+ .with(CalciteConnectionProperty.CONFORMANCE,
+ SqlConformanceEnum.DEFAULT)
+ .with(CalciteAssert.Config.SCOTT)
+ .connect();
+ case "scott-sqlserver2008":
+ // Same as "scott", but uses Calcite's default conformance.
Review Comment:
comment is copy-pasted and identical to other comments
##########
core/src/main/java/org/apache/calcite/sql/validate/SqlConformance.java:
##########
@@ -583,4 +585,20 @@ public interface SqlConformance {
*/
@Experimental
boolean allowLenientCoercion();
+
+ /**
+ * Specifies a rounding behavior for numerical operations capable of
discarding precision.
+ *
+ * <p>Among the built-in conformance levels,
+ * {@link RoundingMode#HALF_UP} in
+ * {@link SqlConformanceEnum#MYSQL_5},
+ * {@link SqlConformanceEnum#ORACLE_10},
+ * {@link SqlConformanceEnum#ORACLE_12};
+ * {@link RoundingMode#DOWN} otherwise.
+ *
+ * <p> {@link org.apache.calcite.sql.SqlDialect.DatabaseProduct#CALCITE}'s
+ * default is {@link RoundingMode#DOWN} and {@link
org.apache.calcite.sql.SqlDialect.DatabaseProduct#POSTGRESQL},
+ * {@link org.apache.calcite.sql.SqlDialect.DatabaseProduct#MYSQL} and
{@link org.apache.calcite.sql.SqlDialect.DatabaseProduct#ORACLE} is {@link
RoundingMode#HALF_UP}.
Review Comment:
line is too long and can be wrapped
##########
core/src/test/resources/sql/misc.iq:
##########
@@ -2658,4 +2658,151 @@ FROM "hr"."emps";
!ok
+# [CALCITE-4838] Add RoundingMode in SqlConformance to document the rounding
mode when cast an approximate numeric to int
+!use scott-mysql
+
+select cast(5.5 as int),
+ cast(3.5 as int),
+ cast(1.6 as int),
+ cast(1.1 as int),
+ cast(1.0 as int),
+ cast(-1.0 as int),
+ cast(-1.1 as int),
+ cast(-1.6 as int),
+ cast(-2.5 as int),
+ cast(15.5 as int)
+from (values 0) as t(x);
++--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+| EXPR$0 | EXPR$1 | EXPR$2 | EXPR$3 | EXPR$4 | EXPR$5 | EXPR$6 | EXPR$7 |
EXPR$8 | EXPR$9 |
++--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+| 6 | 4 | 2 | 1 | 1 | -1 | -1 | -2 |
-3 | 16 |
++--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+(1 row)
+
+!ok
+
+select cast(5.5 as tinyint),
+ cast(3.5 as tinyint),
+ cast(1.6 as tinyint),
+ cast(1.1 as tinyint),
+ cast(1.0 as tinyint),
+ cast(-1.0 as tinyint),
+ cast(-1.1 as tinyint),
+ cast(-1.6 as tinyint),
+ cast(-2.5 as tinyint),
+ cast(15.5 as tinyint)
+from (values 0) as t(x);
++--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+| EXPR$0 | EXPR$1 | EXPR$2 | EXPR$3 | EXPR$4 | EXPR$5 | EXPR$6 | EXPR$7 |
EXPR$8 | EXPR$9 |
++--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+| 6 | 4 | 2 | 1 | 1 | -1 | -1 | -2 |
-3 | 16 |
++--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+(1 row)
+
+!ok
+
+
+select cast(5.5 as smallint),
Review Comment:
for each statement, add comments explaining what rounding mode is being used
##########
core/src/main/java/org/apache/calcite/adapter/enumerable/RexImpTable.java:
##########
@@ -1435,6 +1435,14 @@ public Expression handle(Expression x) {
}
}
+ static Expression getDefaultValue(Type type, RoundingMode roundingMode) {
+ Primitive p = Primitive.of(type);
+ if (p != null) {
+ return Expressions.constant(p.defaultValue, type, roundingMode);
+ }
+ return Expressions.constant(null, type);
+ }
+
static Expression getDefaultValue(Type type) {
Review Comment:
should the method without `roundingMode` be deprecated?
##########
core/src/main/java/org/apache/calcite/rex/RexExecutorImpl.java:
##########
@@ -133,7 +152,7 @@ public static RexExecutable getExecutable(RexBuilder
rexBuilder, List<RexNode> e
try {
code = compile(rexBuilder, constExps, (list, index, storageType) -> {
throw new UnsupportedOperationException();
- });
+ }, sqlConformance);
Review Comment:
code is more readable if the lambda is the last parameter
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