AMashenkov commented on code in PR #2396:
URL: https://github.com/apache/ignite-3/pull/2396#discussion_r1288214793
##########
modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/exec/exp/IgniteSqlFunctions.java:
##########
@@ -213,40 +192,90 @@ public static BigDecimal toBigDecimal(Object o, int
precision, int scale) {
}
return o instanceof Number ? toBigDecimal((Number) o, precision, scale)
- : toBigDecimal(o.toString(), precision, scale);
+ : toBigDecimal(o.toString(), precision, scale);
}
/**
- * Converts the given {@code BigDecimal} to a decimal with the given
{@code precision} and {@code scale}
+ * Converts the given {@code Number} to a decimal with the given {@code
precision} and {@code scale}
* according to SQL spec for CAST specification: General Rules, 8.
*/
- public static BigDecimal convertDecimal(BigDecimal value, int precision,
int scale) {
+ public static BigDecimal toBigDecimal(Number value, int precision, int
scale) {
assert precision > 0 : "Invalid precision: " + precision;
+ if (value == null) {
+ return null;
+ }
+
int defaultPrecision =
IgniteTypeSystem.INSTANCE.getDefaultPrecision(SqlTypeName.DECIMAL);
+
if (precision == defaultPrecision) {
+ BigDecimal dec = convertToBigDecimal(value);
// This branch covers at least one known case: access to dynamic
parameter from context.
// In this scenario precision = DefaultTypePrecision, because
types for dynamic params
// are created by toSql(createType(param.class)).
- return value;
+ return dec;
}
- boolean nonZero = !value.unscaledValue().equals(BigInteger.ZERO);
+ BigDecimal dec = processFractionData(value, precision, scale);
- if (nonZero) {
- if (scale > precision) {
- throw new SqlException(RUNTIME_ERR,
NUMERIC_FIELD_OVERFLOW_ERROR);
- } else {
- int currentSignificantDigits = value.precision() -
value.scale();
- int expectedSignificantDigits = precision - scale;
+ if (dec != null) {
+ return dec;
+ } else {
+ dec = convertToBigDecimal(value);
+ }
Review Comment:
Actually, there are 2 cases:
numbers, which contains fractional part only, (when `value.longValue() == 0`)
and numbers with integral part.
```suggestion
if (value.longValue() == 0) {
return processFractionalValue(...);
} else {
return processValueWithIntegralPart(..);
}
```
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