support allowDecimalPrecisionLoss

Signed-off-by: Yuan Zhou <[email protected]>

Author: zhouyuan

cpp/velox/compute/WholeStageResultIterator.cc

@@ -288,6 +288,8 @@ std::unordered_map<std::string, std::string> WholeStageResultIterator::getQueryC
     configs[velox::core::QueryConfig::kCastToIntByTruncate] = std::to_string(true);
     // To align with Spark's behavior, allow decimal in casting string to int.
     configs[velox::core::QueryConfig::kCastIntAllowDecimal] = std::to_string(true);
+    // To align with Spark's behavior, allow decimal precision loss or not.
+    configs[velox::core::QueryConfig::kAllowPrecisionLoss] = getConfigValue(confMap_, kAllowPrecisionLoss, "true");;
     auto defaultTimezone = getConfigValue(confMap_, kDefaultSessionTimezone, "");
     configs[velox::core::QueryConfig::kSessionTimezone] = getConfigValue(confMap_, kSessionTimezone, defaultTimezone);
     // Adjust timestamp according to the above configured session timezone.

ep/build-velox/src/get_velox.sh

@@ -16,8 +16,8 @@
 
 set -exu
 
-VELOX_REPO=https://github.com/oap-project/velox.git
-VELOX_BRANCH=main
+VELOX_REPO=https://github.com/zhouyuan/velox.git
+VELOX_BRANCH=wip_decimal_precision_loss
 VELOX_HOME=""
 
 #Set on run gluten on HDFS