julianhyde commented on a change in pull request #1834: [CALCITE-3823] Do not
use String.replaceAll
URL: https://github.com/apache/calcite/pull/1834#discussion_r385465537
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File path: core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java
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@@ -1694,16 +1696,18 @@ public static String toString(double x) {
BigDecimal bigDecimal =
new BigDecimal(x, MathContext.DECIMAL64).stripTrailingZeros();
final String s = bigDecimal.toString();
- return s.replaceAll("0*E", "E").replace("E+", "E");
+ return PATTERN_0_STAR_E.matcher(s).replaceAll("E").replace("E+", "E");
}
/** CAST(DECIMAL AS VARCHAR). */
public static String toString(BigDecimal x) {
final String s = x.toString();
- if (s.startsWith("0")) {
+ if (s.equals("0")) {
+ return s;
+ } else if (s.startsWith("0.")) {
Review comment:
The `Float.toString()`is not locale-dependent - that is, it always uses '.'
as decimal separator - and I think that's what we want for `CAST(REAL AS
VARCHAR)`.
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