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branch-2.1: [fix](Nereids) fix substring with only one parameter #48957 (#49030)

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Cherry-picked from #48957

Co-authored-by: LiBinfeng <libinfeng@selectdb.com>
This commit is contained in:
github-actions[bot]
2025-03-19 09:56:13 +08:00
committed by GitHub
parent 1822120c13
commit 13c174df4b
2 changed files with 10 additions and 3 deletions
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7
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/executable/StringArithmetic.java
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@ -84,7 +84,7 @@ public class StringArithmetic {
if (stringLength == 0) {
return "";
}
int leftIndex = 0;
long leftIndex = 0;
if (second < (- stringLength)) {
return "";
} else if (second < 0) {
@ -94,7 +94,7 @@ public class StringArithmetic {
} else {
return "";
}
int rightIndex = 0;
long rightIndex = 0;
if (third <= 0) {
return "";
} else if ((third + leftIndex) > stringLength) {
@ -102,7 +102,8 @@ public class StringArithmetic {
} else {
rightIndex = third + leftIndex;
}
return first.substring(leftIndex, rightIndex);
// left index and right index are in integer range because of definition, so we can safely cast it to int
return first.substring((int) leftIndex, (int) rightIndex);
}
/**