Merge pull request #1431 from cloudsufi/patch/array-logical-type-validation

[PLUGIN-1803] Add validation for logical type (array/repeated)

Author: psainics

src/main/java/io/cdap/plugin/gcp/bigquery/util/BigQueryUtil.java

@@ -438,15 +438,28 @@ public static ValidationFailure validateFieldSchemaMatches(Field bqField, Schema
       if (bqField.getMode() == Field.Mode.REPEATED) {
         fieldSchema = fieldSchema.getComponentSchema();
         type = fieldSchema.getType();
+        logicalType = fieldSchema.getLogicalType();
       }
     }
 
+    String[] incompatibleFieldErrorMessage = {
+      String.format("Field '%s' of type '%s' is incompatible with column '%s' of type '%s' in BigQuery table '%s.%s'.",
+          field.getName(), fieldSchema.getDisplayName(), bqField.getName(),
+          BQ_TYPE_MAP.get(bqField.getType()), dataset, table) ,
+      String.format("It must be of type '%s'.", BQ_TYPE_MAP.get(bqField.getType()))
+    };
+    if (logicalType != null) {
+      if (LOGICAL_TYPE_MAP.get(logicalType) != null && !LOGICAL_TYPE_MAP.get(logicalType).contains(bqField.getType())) {
+        return collector.addFailure(incompatibleFieldErrorMessage[0], incompatibleFieldErrorMessage[1]);
+      }
+
+      // Return once logical types are validated. This is because logical types are represented as primitive types
+      // internally.
+      return null;
+    }
+
     if (TYPE_MAP.get(type) != null && !TYPE_MAP.get(type).contains(bqField.getType())) {
-      return collector.addFailure(
-        String.format("Field '%s' of type '%s' is incompatible with column '%s' of type '%s' " +
-                        "in BigQuery table '%s.%s'.", field.getName(), fieldSchema.getDisplayName(), bqField.getName(),
-                      BQ_TYPE_MAP.get(bqField.getType()), dataset, table),
-        String.format("It must be of type '%s'.", BQ_TYPE_MAP.get(bqField.getType())));
+      return collector.addFailure(incompatibleFieldErrorMessage[0], incompatibleFieldErrorMessage[1]);
     }
     return null;
   }

src/test/java/io/cdap/plugin/gcp/bigquery/util/BigQueryUtilTest.java

@@ -23,6 +23,7 @@
 import io.cdap.cdap.etl.api.FailureCollector;
 import io.cdap.cdap.etl.api.validation.ValidationFailure;
 import io.cdap.cdap.etl.mock.validation.MockFailureCollector;
+import io.cdap.plugin.gcp.bigquery.source.BigQuerySourceConfig;
 import io.cdap.plugin.gcp.bigquery.util.BigQueryTypeSize.BigNumeric;
 import io.cdap.plugin.gcp.bigquery.util.BigQueryTypeSize.Numeric;
 import io.cdap.plugin.gcp.common.GCPUtils;
@@ -478,4 +479,32 @@ public void testConvertFieldTypeJsonToString() {
       Schema result = BigQueryUtil.convertFieldType(field, null, null);
       Assert.assertEquals(expectedSchema, result);
   }
+
+  @Test
+  public void testValidateFieldSchemaMatchesDate() {
+    MockFailureCollector collector = new MockFailureCollector();
+    Field bigQueryField = Field.newBuilder("testFieldRepeatedDate", StandardSQLTypeName.DATE)
+        .setMode(Field.Mode.REPEATED).build();
+    Schema.Field schemaField = Schema.Field.of("testFieldRepeatedDate",
+        Schema.nullableOf(Schema.arrayOf(Schema.of(Schema.LogicalType.DATE))));
+    ValidationFailure failure = BigQueryUtil.validateFieldSchemaMatches(bigQueryField, schemaField, "dataset",
+        "table", BigQuerySourceConfig.SUPPORTED_TYPES, collector);
+    Assert.assertNull(failure);
+    Assert.assertEquals(0, collector.getValidationFailures().size());
+  }
+
+  @Test
+  public void testValidateFieldSchemaNotMatchesDate() {
+    MockFailureCollector collector = new MockFailureCollector();
+    Field bigQueryField = Field.newBuilder("testFieldRepeatedDate", StandardSQLTypeName.DATE)
+        .setMode(Field.Mode.REPEATED).build();
+    Schema.Field schemaField = Schema.Field.of("testFieldRepeatedDate",
+        Schema.nullableOf(Schema.arrayOf(Schema.of(Schema.Type.STRING))));
+    ValidationFailure failure = BigQueryUtil.validateFieldSchemaMatches(bigQueryField, schemaField, "dataset",
+        "table", BigQuerySourceConfig.SUPPORTED_TYPES, collector);
+    Assert.assertNotNull(failure);
+    Assert.assertEquals(1, collector.getValidationFailures().size());
+    Assert.assertEquals("Field 'testFieldRepeatedDate' of type 'string' is incompatible with" +
+        " column 'testFieldRepeatedDate' of type 'date' in BigQuery table 'dataset.table'.", failure.getMessage());
+  }
 }