chenhao7253886 commented on a change in pull request #1126: FE support
assigning constant conjunct and calculating expression
URL: https://github.com/apache/incubator-doris/pull/1126#discussion_r282810304
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File path: fe/src/main/java/org/apache/doris/analysis/CastExpr.java
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@@ -248,4 +248,33 @@ public boolean canHashPartition() {
return false;
}
+ @Override
+ public Expr getResultValue() throws AnalysisException {
+ final Expr value = children.get(0).getResultValue();
+ if (!(value instanceof LiteralExpr)) {
+ return this;
+ }
+
+ final Expr targetExpr = castTo((LiteralExpr)value);
+ return targetExpr;
+ }
+
+ private Expr castTo(LiteralExpr value) throws AnalysisException {
Review comment:
This can't use uncheckCast, it is used by impliclit cast and it will return
new CastExpr for no supporting type, so it will cause dead loop.
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