[calcite] branch master updated: [CALCITE-4265] Improve error message when CAST to unknown type (Louis Kuang)

[danny0405]

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danny0405 pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/calcite.git


The following commit(s) were added to refs/heads/master by this push:
     new 207bc8a  [CALCITE-4265] Improve error message when CAST to unknown 
type (Louis Kuang)
207bc8a is described below

commit 207bc8a0d731fa40e84309dfea3f8189b383e117
Author: Louis Kuang <louisku...@google.com>
AuthorDate: Wed Jan 13 21:31:38 2021 -0500

    [CALCITE-4265] Improve error message when CAST to unknown type (Louis
    Kuang)
    
    If SqlNode is an Identifier node whose type can not be derived, throws
    a validation error instead of an UnsupportedOperationException to improve
    error message.
    
    close apache/calcite#2326
---
 .../java/org/apache/calcite/sql/validate/SqlValidatorImpl.java |  3 +++
 .../test/java/org/apache/calcite/test/SqlValidatorTest.java    | 10 +++++-----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git 
a/core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java 
b/core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java
index 53c3f09..e83d213 100644
--- a/core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java
+++ b/core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java
@@ -1759,6 +1759,9 @@ public class SqlValidatorImpl implements 
SqlValidatorWithHints {
   @Override public RelDataType getValidatedNodeType(SqlNode node) {
     RelDataType type = getValidatedNodeTypeIfKnown(node);
     if (type == null) {
+      if (node.getKind() == SqlKind.IDENTIFIER) {
+        throw newValidationError(node, 
RESOURCE.unknownIdentifier(node.toString()));
+      }
       throw Util.needToImplement(node);
     } else {
       return type;
diff --git a/core/src/test/java/org/apache/calcite/test/SqlValidatorTest.java 
b/core/src/test/java/org/apache/calcite/test/SqlValidatorTest.java
index 679464b..cfab141 100644
--- a/core/src/test/java/org/apache/calcite/test/SqlValidatorTest.java
+++ b/core/src/test/java/org/apache/calcite/test/SqlValidatorTest.java
@@ -1244,8 +1244,8 @@ public class SqlValidatorTest extends 
SqlValidatorTestCase {
   }
 
   @Test void testCastRegisteredType() {
-    expr("cast(123 as customBigInt)")
-        .fails("class org.apache.calcite.sql.SqlIdentifier: CUSTOMBIGINT");
+    expr("cast(123 as ^customBigInt^)")
+        .fails("Unknown identifier 'CUSTOMBIGINT'");
     expr("cast(123 as sales.customBigInt)")
         .columnType("BIGINT NOT NULL");
     expr("cast(123 as catalog.sales.customBigInt)")
@@ -1254,7 +1254,7 @@ public class SqlValidatorTest extends 
SqlValidatorTestCase {
 
   @Test void testCastFails() {
     expr("cast('foo' as ^bar^)")
-        .fails("class org.apache.calcite.sql.SqlIdentifier: BAR");
+        .fails("Unknown identifier 'BAR'");
     wholeExpr("cast(multiset[1] as integer)")
         .fails("(?s).*Cast function cannot convert value of type "
             + "INTEGER MULTISET to type INTEGER");
@@ -8007,9 +8007,9 @@ public class SqlValidatorTest extends 
SqlValidatorTestCase {
             + "VARCHAR(5) NOT NULL ARRAY NOT NULL F1) NOT NULL "
             + "ARRAY NOT NULL MULTISET NOT NULL");
     // test UDT collection type.
-    sql("select cast(a as MyUDT array multiset) from COMPLEXTYPES.CTC_T1")
+    sql("select cast(a as ^MyUDT^ array multiset) from COMPLEXTYPES.CTC_T1")
         .withExtendedCatalog()
-        .fails("(?s).*class org\\.apache\\.calcite\\.sql\\.SqlIdentifier: 
MYUDT.*");
+        .fails("Unknown identifier 'MYUDT'");
   }
 
   @Test void testCastAsRowType() {