[GitHub] [incubator-pinot] Jackie-Jiang commented on a change in pull request #6941: Fix CAST transform function for chained transforms

[GitBox]

Jackie-Jiang commented on a change in pull request #6941:
URL: https://github.com/apache/incubator-pinot/pull/6941#discussion_r634938732



##########
File path: 
pinot-core/src/main/java/org/apache/pinot/core/operator/transform/function/CastTransformFunction.java
##########
@@ -94,51 +94,157 @@ public TransformResultMetadata getResultMetadata() {
 
   @Override
   public int[] transformToIntValuesSV(ProjectionBlock projectionBlock) {
-    return _transformFunction.transformToIntValuesSV(projectionBlock);
+    // When casting to FLOAT, need to first read as the result type then 
convert to int values
+    DataType resultStoredType = _resultMetadata.getDataType().getStoredType();
+    if (resultStoredType != DataType.FLOAT) {
+      return _transformFunction.transformToIntValuesSV(projectionBlock);
+    } else {
+      if (_intValuesSV == null) {
+        _intValuesSV = new int[DocIdSetPlanNode.MAX_DOC_PER_CALL];
+      }
+      int numDocs = projectionBlock.getNumDocs();
+      float[] floatValues = 
_transformFunction.transformToFloatValuesSV(projectionBlock);
+      ArrayCopyUtils.copy(floatValues, _intValuesSV, numDocs);
+      return _intValuesSV;
+    }
   }
 
   @Override
   public long[] transformToLongValuesSV(ProjectionBlock projectionBlock) {
-    return _transformFunction.transformToLongValuesSV(projectionBlock);
+    // When casting to INT/FLOAT/DOUBLE, need to first read as the result type 
then convert to long values
+    DataType resultStoredType = _resultMetadata.getDataType().getStoredType();
+    if (resultStoredType != DataType.INT && resultStoredType != DataType.FLOAT 
&& resultStoredType != DataType.DOUBLE) {
+      return _transformFunction.transformToLongValuesSV(projectionBlock);
+    } else {
+      if (_longValuesSV == null) {
+        _longValuesSV = new long[DocIdSetPlanNode.MAX_DOC_PER_CALL];
+      }
+      int numDocs = projectionBlock.getNumDocs();
+      if (resultStoredType == DataType.INT) {
+        int[] intValues = 
_transformFunction.transformToIntValuesSV(projectionBlock);
+        ArrayCopyUtils.copy(intValues, _longValuesSV, numDocs);
+      } else if (resultStoredType == DataType.FLOAT) {
+        float[] floatValues = 
_transformFunction.transformToFloatValuesSV(projectionBlock);
+        ArrayCopyUtils.copy(floatValues, _longValuesSV, numDocs);
+      } else {
+        double[] doubleValues = 
_transformFunction.transformToDoubleValuesSV(projectionBlock);
+        ArrayCopyUtils.copy(doubleValues, _longValuesSV, numDocs);
+      }
+      return _longValuesSV;
+    }
   }
 
   @Override
   public float[] transformToFloatValuesSV(ProjectionBlock projectionBlock) {
-    return _transformFunction.transformToFloatValuesSV(projectionBlock);
+    // When casting to INT/LONG, need to first read as the result type then 
convert to float values
+    DataType resultStoredType = _resultMetadata.getDataType().getStoredType();
+    if (resultStoredType != DataType.INT && resultStoredType != DataType.LONG) 
{
+      return _transformFunction.transformToFloatValuesSV(projectionBlock);
+    } else {
+      if (_floatValuesSV == null) {
+        _floatValuesSV = new float[DocIdSetPlanNode.MAX_DOC_PER_CALL];
+      }
+      int numDocs = projectionBlock.getNumDocs();
+      if (resultStoredType == DataType.INT) {

Review comment:
       That is in the `else` block




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