Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/11836#discussion_r56755343
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -31,17 +32,34 @@ import
org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, SubqueryAlias}
* proxy to the underlying metastore (e.g. Hive Metastore) and it also
manages temporary
* tables and functions of the Spark Session that it belongs to.
*/
-class SessionCatalog(externalCatalog: ExternalCatalog) {
+class SessionCatalog(externalCatalog: ExternalCatalog, conf: CatalystConf)
{
import ExternalCatalog._
- private[this] val tempTables = new ConcurrentHashMap[String, LogicalPlan]
- private[this] val tempFunctions = new ConcurrentHashMap[String,
CatalogFunction]
+ def this(externalCatalog: ExternalCatalog) {
+ this(externalCatalog, new SimpleCatalystConf(true))
+ }
+
+ protected[this] val tempTables = new ConcurrentHashMap[String,
LogicalPlan]
+ protected[this] val tempFunctions = new ConcurrentHashMap[String,
CatalogFunction]
// Note: we track current database here because certain operations do
not explicitly
// specify the database (e.g. DROP TABLE my_table). In these cases we
must first
// check whether the temporary table or function exists, then, if not,
operate on
// the corresponding item in the current database.
- private[this] var currentDb = "default"
+ protected[this] var currentDb = {
+ val defaultName = "default"
+ val defaultDbDefinition = CatalogDatabase(defaultName, "default
database", "", Map())
+ // Initialize default database if it doesn't already exist
+ createDatabase(defaultDbDefinition, ignoreIfExists = true)
+ defaultName
+ }
+
+ /**
+ * Format table name, taking into account case sensitivity.
+ */
+ protected[this] def formatTableName(name: String): String = {
+ if (conf.caseSensitiveAnalysis) name else name.toLowerCase
--- End diff --
Later, it will be good to use this to handle other db name as well for the
consistency reason (it will not actually have any effect right now though).
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