bwzheng2010 commented on code in PR #4739:
URL: https://github.com/apache/hive/pull/4739#discussion_r1416618023
##########
common/src/java/org/apache/hadoop/hive/conf/HiveConf.java:
##########
@@ -5725,7 +5725,10 @@ public static enum ConfVars {
HIVE_ADDITIONAL_CONFIG_FILES("hive.additional.config.files", "",
"The names of additional config files, such as ldap-site.xml," +
- "tez-site.xml, etc in comma separated list.");
+ "tez-site.xml, etc in comma separated list."),
+
+
HIVE_SQL_DECIMAL_OPERATIONS_ALLOW_PRECISION_LOSS("hive.sql.decimalOperations.allowPrecisionLoss",
true,
Review Comment:
> i think that is a confusing config, we should fix the precision and scale
adjustment in the existing code cc @simhadri-g
Hi，Hive’s new behavior introduced in Hive 2.2 (HIVE-15331)，The new behavior
conflicts with the old behavior, and I think perhaps the only solution is to
choose between them through configuration.
BTW，This solution takes its cues from Spark's methodology
(spark.sql.decimalOperations.allowPrecisionLoss), as extensively outlined in
the [Spark SQL Migration Guide
](https://spark.apache.org/docs/2.4.0/sql-migration-guide-upgrade.html#upgrading-from-spark-sql-22-to-23)for
the transition from version 2.2 to 2.3 .
##########
common/src/java/org/apache/hadoop/hive/conf/HiveConf.java:
##########
@@ -5725,7 +5725,10 @@ public static enum ConfVars {
HIVE_ADDITIONAL_CONFIG_FILES("hive.additional.config.files", "",
"The names of additional config files, such as ldap-site.xml," +
- "tez-site.xml, etc in comma separated list.");
+ "tez-site.xml, etc in comma separated list."),
+
+
HIVE_SQL_DECIMAL_OPERATIONS_ALLOW_PRECISION_LOSS("hive.sql.decimalOperations.allowPrecisionLoss",
true,
Review Comment:
> i think that is a confusing config, we should fix the precision and scale
adjustment in the existing code cc @simhadri-g
Hi，Hive’s new behavior introduced in Hive 2.2 (HIVE-15331)，The new behavior
conflicts with the old behavior, and I think perhaps the only solution is to
choose between them through configuration.
BTW，This solution takes its cues from Spark's methodology
(spark.sql.decimalOperations.allowPrecisionLoss), as extensively outlined in
the [Spark SQL Migration Guide
](https://spark.apache.org/docs/2.4.0/sql-migration-guide-upgrade.html#upgrading-from-spark-sql-22-to-23)for
the transition from version 2.2 to 2.3 .
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