xuzifu666 commented on code in PR #4818:
URL: https://github.com/apache/calcite/pull/4818#discussion_r2902831529
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core/src/main/java/org/apache/calcite/sql/dialect/HiveSqlDialect.java:
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@@ -129,6 +129,9 @@ public HiveSqlDialect(Context context) {
case TRIM:
RelToSqlConverterUtil.unparseHiveTrim(writer, call, leftPrec, rightPrec);
break;
+ case REGEXP:
Review Comment:
Based on your Jira description, is it true that ```select brand_name from
product where REGEXP(brand_name,'[a-zA-Z]')``` won't work in Hive? It needs to
be converted to ```select brand_name from product where brand_name REGEXP
'[a-zA-Z]'```.
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