Add generic setters to void casting values to any

data_chunk.go

@@ -58,19 +58,8 @@ func (chunk *DataChunk) SetValue(colIdx int, rowIdx int, val any) error {
 	}
 	column := &chunk.columns[colIdx]
 
-	// Ensure that the types match before attempting to set anything.
-	// This is done to prevent failures 'halfway through' writing column values,
-	// potentially corrupting data in that column.
-	// FIXME: Can we improve efficiency here? We are casting back-and-forth to any A LOT.
-	// FIXME: Maybe we can make columnar insertions unsafe, i.e., we always assume a correct type.
-	v, err := column.tryCast(val)
-	if err != nil {
-		return addIndexToError(err, colIdx)
-	}
-
 	// Set the value.
-	column.setFn(column, C.idx_t(rowIdx), v)
-	return nil
+	return column.setFn(column, C.idx_t(rowIdx), val)
 }
 
 func (chunk *DataChunk) initFromTypes(ptr unsafe.Pointer, types []C.duckdb_logical_type, writable bool) error {

type_info.go

@@ -52,6 +52,7 @@ type baseTypeInfo struct {
 	structEntries []StructEntry
 	decimalWidth  uint8
 	decimalScale  uint8
+	internalType  Type // This is the internal type for enum and decimal values
 }
 
 type vectorTypeInfo struct {