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Code Issues Releases Wiki Activity

fix right() bug

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kiki
2013-06-06 14:29:08 +08:00
parent 40a3b4364b
commit d75b1104a5
1 changed files with 7 additions and 3 deletions
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src/main/java/com/alibaba/druid/sql/visitor/functions/Right.java
+7 -3
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@@ -22,10 +22,10 @@ import com.alibaba.druid.sql.ast.expr.SQLMethodInvokeExpr;
import com.alibaba.druid.sql.visitor.SQLEvalVisitor;
import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
public class Right implements Function {
public final static Right instance = new Right();
public Object eval(SQLEvalVisitor visitor, SQLMethodInvokeExpr x) {
if (x.getParameters().size() != 2) {
return SQLEvalVisitor.EVAL_ERROR;
@@ -45,7 +45,11 @@ public class Right implements Function {
String strValue = param0Value.toString();
int intValue = SQLEvalVisitorUtils.castToInteger(param1Value);
String result = strValue.substring(strValue.length() - intValue, strValue.length());
int start = strValue.length() - intValue;
if (start < 0) {
start = 0;
}
String result = strValue.substring(start, strValue.length());
return result;
}
}