924060929 commented on code in PR #46482:
URL: https://github.com/apache/doris/pull/46482#discussion_r1916043589
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/StringLikeLiteral.java:
##########
@@ -62,6 +66,59 @@ public String getValue() {
return value;
}
+ @Override
+ public LiteralExpr toLegacyLiteral() {
+ return new org.apache.doris.analysis.StringLiteral(value);
+ }
+
+ @Override
+ public int compareTo(ComparableLiteral other) {
+ if (other instanceof StringLikeLiteral) {
+ // compare string with utf-8 byte array, same with
DM,BE,StorageEngine
+ byte[] thisBytes = null;
+ byte[] otherBytes = null;
+ try {
+ thisBytes = getStringValue().getBytes("UTF-8");
+ otherBytes = ((Literal)
other).getStringValue().getBytes("UTF-8");
+ } catch (UnsupportedEncodingException e) {
+ Preconditions.checkState(false);
Review Comment:
do not eat the exception. new AnalysisException and wrap
UnsupportedEncodingException and then throw it
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/expression/rules/FoldConstantRuleOnFE.java:
##########
@@ -266,7 +267,13 @@ public Expression visitEqualTo(EqualTo equalTo,
ExpressionRewriteContext context
if (checkedExpr.isPresent()) {
return checkedExpr.get();
}
- return BooleanLiteral.of(((Literal)
equalTo.left()).compareTo((Literal) equalTo.right()) == 0);
+ try {
+ return BooleanLiteral.of(((ComparableLiteral) equalTo.left())
+ .compareTo((ComparableLiteral) equalTo.right()) == 0);
+ } catch (Exception e) {
+ // left and right maybe not comparable
+ return BooleanLiteral.of(equalTo.left().equals(equalTo.right()));
+ }
Review Comment:
add this to try best to avoid throw exception because throw exception are
too slow, similar modifications also need to be made in this way
```java
if (equalTo.left() instanceof ComparableLiteral && equalsTo.right()
instanceof ComparableLiteral) {
try {
return BooleanLiteral.of(((ComparableLiteral) equalTo.left())
.compareTo((ComparableLiteral) equalTo.right()) ==
0);
} catch (Exception e) {
return BooleanLiteral.of(equalTo.left().equals(equalTo.right()));
}
} else {
return BooleanLiteral.of(equalTo.left().equals(equalTo.right()));
}
```
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