Wenchen Fan b9a147181d [SPARK-17720][SQL] introduce static SQL conf ... ## What changes were proposed in this pull request? SQLConf is session-scoped and mutable. However, we do have the requirement for a static SQL conf, which is global and immutable, e.g. the `schemaStringThreshold` in `HiveExternalCatalog`, the flag to enable/disable hive support, the global temp view database in https://github.com/apache/spark/pull/14897. Actually we've already implemented static SQL conf implicitly via `SparkConf`, this PR just make it explicit and expose it to users, so that they can see the config value via SQL command or `SparkSession.conf`, and forbid users to set/unset static SQL conf. ## How was this patch tested? new tests in SQLConfSuite Author: Wenchen Fan <wenchen@databricks.com> Closes #15295 from cloud-fan/global-conf.		2016-10-11 20:27:08 -07:00
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compatibility/src/test/scala/org/apache/spark/sql/hive/execution	[SPARK-17258][SQL] Parse scientific decimal literals as decimals	2016-10-04 23:48:26 -07:00
src	[SPARK-17720][SQL] introduce static SQL conf	2016-10-11 20:27:08 -07:00
pom.xml	[SPARK-16535][BUILD] In pom.xml, remove groupId which is redundant definition and inherited from the parent	2016-07-19 11:59:46 +01:00