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Add mask functions to allow gandiva evaluation. #143

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Add mask functions to allow gandiva evaluation. #143

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18 changes: 18 additions & 0 deletions cpp/src/gandiva/function_registry_string.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -559,6 +559,24 @@ std::vector<NativeFunction> GetStringFunctionRegistry() {
kResultNullIfNull, "gdv_mask_show_last_n_utf8_int32",
NativeFunction::kNeedsContext),

// Single entry point for all five Hive masking modes with caller-supplied
// replacements, for engines that normalise MASK / MASK_FIRST_N / MASK_LAST_N /
// MASK_SHOW_FIRST_N / MASK_SHOW_LAST_N into one call.
NativeFunction("mask_internal", {},
DataTypeVector{utf8() /*text*/, utf8() /*mode*/,
int32() /*char_count*/, utf8() /*upper*/,
utf8() /*lower*/, utf8() /*digit*/, utf8() /*other*/},
utf8(), kResultNullIfNull, "gdv_fn_mask_internal",
NativeFunction::kNeedsContext | NativeFunction::kCanReturnErrors),

// The five-argument form takes the Hive otherChar: the replacement for every
// character that is neither an uppercase letter, a lowercase letter nor a decimal
// digit. The shorter forms leave those characters unchanged, which is Hive's
// default.
NativeFunction("mask", {}, DataTypeVector{utf8(), utf8(), utf8(), utf8(), utf8()},
utf8(), kResultNullIfNull, "mask_utf8_utf8_utf8_utf8_utf8",
NativeFunction::kNeedsContext),

NativeFunction("mask", {}, DataTypeVector{utf8(), utf8(), utf8(), utf8()}, utf8(),
kResultNullIfNull, "mask_utf8_utf8_utf8_utf8",
NativeFunction::kNeedsContext),
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