[fix](cast) wrong result while cast const to double then to string (#31657)

Issue Number: close #31514
2024-03-05 13:15:25 +08:00
parent 5ed3c7eeef
commit 7998da4691
5 changed files with 13 additions and 0 deletions
--- a/fe/fe-core/src/main/java/org/apache/doris/analysis/FloatLiteral.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/analysis/FloatLiteral.java
@ -137,6 +137,11 @@ public class FloatLiteral extends NumericLiteralExpr {
        }
        NumberFormat nf = NumberFormat.getInstance();
        nf.setGroupingUsed(false);
+        if (type == Type.FLOAT) {
+            nf.setMaximumFractionDigits(7);
+        } else {
+            nf.setMaximumFractionDigits(16);
+        }
        return nf.format(value);
    }