Github user arina-ielchiieva commented on a diff in the pull request:
https://github.com/apache/drill/pull/666#discussion_r96142739
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/handlers/ViewHandler.java
---
@@ -74,36 +93,49 @@ public PhysicalPlan getPlan(SqlNode sqlNode) throws
ValidationException, RelConv
final SchemaPlus defaultSchema = context.getNewDefaultSchema();
final AbstractSchema drillSchema =
SchemaUtilites.resolveToMutableDrillSchema(defaultSchema,
createView.getSchemaPath());
- final String schemaPath = drillSchema.getFullSchemaName();
final View view = new View(newViewName, viewSql,
newViewRelNode.getRowType(),
SchemaUtilites.getSchemaPathAsList(defaultSchema));
- final Table existingTable =
SqlHandlerUtil.getTableFromSchema(drillSchema, newViewName);
-
- if (existingTable != null) {
- if (existingTable.getJdbcTableType() != Schema.TableType.VIEW) {
- // existing table is not a view
- throw UserException.validationError()
- .message("A non-view table with given name [%s] already
exists in schema [%s]",
- newViewName, schemaPath)
- .build(logger);
- }
-
- if (existingTable.getJdbcTableType() == Schema.TableType.VIEW &&
!createView.getReplace()) {
- // existing table is a view and create view has no "REPLACE"
clause
- throw UserException.validationError()
- .message("A view with given name [%s] already exists in
schema [%s]",
- newViewName, schemaPath)
- .build(logger);
- }
- }
+ validateViewCreationPossibility(drillSchema, newViewName,
createView.getReplace());
final boolean replaced = drillSchema.createView(view);
final String summary = String.format("View '%s' %s successfully in
'%s' schema",
- createView.getName(), replaced ? "replaced" : "created",
schemaPath);
+ createView.getName(), replaced ? "replaced" : "created",
drillSchema.getFullSchemaName());
return DirectPlan.createDirectPlan(context, true, summary);
}
+
+ /**
+ * Validates if view can be created in indicated schema:
+ * checks if object (persistent / temporary table) with the same exists
+ * in indicated schema, or if view exists but replace flag is not set.
+ *
+ * @param drillSchema schema where views will be created
+ * @param viewName view name
+ * @param replaceView replace view if exists
+ * @throws UserException if views can be created in indicated schema
+ */
+ private void validateViewCreationPossibility(AbstractSchema
drillSchema, String viewName, boolean replaceView) {
+ final String schemaPath = drillSchema.getFullSchemaName();
+ final Table existingTable =
SqlHandlerUtil.getTableFromSchema(drillSchema, viewName);
+
+ if ((existingTable != null && existingTable.getJdbcTableType() !=
Schema.TableType.VIEW) ||
--- End diff --
Done.
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