[CALCITE-6762] Literal Varchar

xiaochen-zhou · Jan 7, 2025 · df02345 · df02345
1 parent 10e2e81
commit df02345
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/core/src/main/java/org/apache/calcite/sql/dialect/PrestoSqlDialect.java b/core/src/main/java/org/apache/calcite/sql/dialect/PrestoSqlDialect.java
@@ -21,6 +21,7 @@
 import org.apache.calcite.rel.type.RelDataType;
 import org.apache.calcite.rel.type.RelDataTypeSystem;
 import org.apache.calcite.rex.RexCall;
+import org.apache.calcite.rex.RexNode;
 import org.apache.calcite.rex.RexUtil;
 import org.apache.calcite.sql.SqlBasicCall;
 import org.apache.calcite.sql.SqlCall;
@@ -35,6 +36,7 @@
 import org.apache.calcite.sql.fun.SqlMapValueConstructor;
 import org.apache.calcite.sql.fun.SqlStdOperatorTable;
 import org.apache.calcite.sql.parser.SqlParserPos;
+import org.apache.calcite.sql.type.SqlTypeName;
 import org.apache.calcite.sql.type.SqlTypeUtil;
 import org.apache.calcite.util.RelToSqlConverterUtil;
 
@@ -88,8 +90,10 @@ public PrestoSqlDialect(Context context) {
   }
 
   @Override public boolean supportsImplicitTypeCoercion(RexCall call) {
+    RexNode rexNode = call.getOperands().get(0);
     return super.supportsImplicitTypeCoercion(call)
-        && RexUtil.isLiteral(call.getOperands().get(0), false)
+        && RexUtil.isLiteral(rexNode, false)
+        && (rexNode.getType().getSqlTypeName() == SqlTypeName.VARCHAR || rexNode.getType().getSqlTypeName() == SqlTypeName.CHAR)
         && !SqlTypeUtil.isNumeric(call.type)
         && !SqlTypeUtil.isDate(call.type)
         && !SqlTypeUtil.isTimestamp(call.type);