Github user arina-ielchiieva commented on a diff in the pull request:
https://github.com/apache/drill/pull/666#discussion_r94760594
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/handlers/DropTableHandler.java
---
@@ -55,35 +58,79 @@ public DropTableHandler(SqlHandlerConfig config) {
*/
@Override
public PhysicalPlan getPlan(SqlNode sqlNode) throws ValidationException,
RelConversionException, IOException {
-
SqlDropTable dropTableNode = ((SqlDropTable) sqlNode);
- SqlIdentifier tableIdentifier = dropTableNode.getTableIdentifier();
-
+ String originalTableName = dropTableNode.getName();
SchemaPlus defaultSchema = config.getConverter().getDefaultSchema();
- AbstractSchema drillSchema = null;
+ List<String> tableSchema = dropTableNode.getSchema();
+
+ boolean removedTemporaryTable = removeTemporaryTable(defaultSchema,
tableSchema, originalTableName);
+ // if table to be dropped is not temporary table, we need to check
among persistent tables or views
+ if (!removedTemporaryTable) {
+ AbstractSchema drillSchema =
SchemaUtilites.resolveToMutableDrillSchema(defaultSchema, tableSchema);
+ Table tableToDrop = SqlHandlerUtil.getTableFromSchema(drillSchema,
originalTableName);
+ if (tableToDrop == null || tableToDrop.getJdbcTableType() !=
Schema.TableType.TABLE) {
+ if (dropTableNode.checkTableExistence()) {
--- End diff --
`checkTableExistence()` is indication for `IF EXISTS` clause in drop
command statement.
Ex: `drop table dfs.tmp.foo` vs `drop table if exists dfs.tmp.foo`
If `IF EXISTS` clause is present, drop command will return result saying
'Table not found' to the user if table to be dropped doesn't exist, otherwise
error is thrown.
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