where is wholestagecodegen gandiva function implement #2113

[LiLiu88]

val wholeStageCodeGenNode = TreeBuilder.makeFunction(
s"wholestagecodegen",
Lists.newArrayList(childCtx.root),
new ArrowType.Int(32, true))

In ColumnarWholeStageCodegenExec.scala

And some other functions, like codegen_left_schema or codegen_right_schema:
auto n_left = TreeExprBuilder::MakeFunction(
"codegen_left_schema",
{TreeExprBuilder::MakeField(table0_f0), TreeExprBuilder::MakeField(table0_f1),
TreeExprBuilder::MakeField(table0_f2)},
uint32());
auto n_right = TreeExprBuilder::MakeFunction(
"codegen_right_schema",
{TreeExprBuilder::MakeField(table1_f0), TreeExprBuilder::MakeField(table1_f1)},
uint32());

[zhztheplayer]

Some of the function implementations are located in codegen/arrowcompute rather than in codegen/gandiva. Although Gandiva's Java API may be leveraged.

Some of the function parameters (e.g. codegen_XXX_schema) are at fix orders in the parameter list so the function names might be there only as descriptions.