234 lines
11 KiB
C++
234 lines
11 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
|
|
// or more contributor license agreements. See the NOTICE file
|
|
// distributed with this work for additional information
|
|
// regarding copyright ownership. The ASF licenses this file
|
|
// to you under the Apache License, Version 2.0 (the
|
|
// "License"); you may not use this file except in compliance
|
|
// with the License. You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing,
|
|
// software distributed under the License is distributed on an
|
|
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
// KIND, either express or implied. See the License for the
|
|
// specific language governing permissions and limitations
|
|
// under the License.
|
|
// This file is copied from
|
|
// https://github.com/apache/impala/blob/branch-2.9.0/be/src/exprs/case-expr.cpp
|
|
// and modified by Doris
|
|
|
|
#include "exprs/case_expr.h"
|
|
|
|
#include "exprs/anyval_util.h"
|
|
#include "exprs/expr_context.h"
|
|
#include "gen_cpp/Exprs_types.h"
|
|
#include "runtime/runtime_state.h"
|
|
|
|
namespace doris {
|
|
|
|
struct CaseExprState {
|
|
// Space to store the values being compared in the interpreted path. This makes it
|
|
// easier to pass around AnyVal subclasses. Allocated from the runtime state's object
|
|
// pool in Prepare().
|
|
AnyVal* case_val;
|
|
AnyVal* when_val;
|
|
};
|
|
|
|
CaseExpr::CaseExpr(const TExprNode& node)
|
|
: Expr(node),
|
|
_has_case_expr(node.case_expr.has_case_expr),
|
|
_has_else_expr(node.case_expr.has_else_expr) {}
|
|
|
|
CaseExpr::~CaseExpr() {}
|
|
|
|
Status CaseExpr::prepare(RuntimeState* state, const RowDescriptor& desc, ExprContext* ctx) {
|
|
RETURN_IF_ERROR(Expr::prepare(state, desc, ctx));
|
|
register_function_context(ctx, state, 0);
|
|
return Status::OK();
|
|
}
|
|
|
|
Status CaseExpr::open(RuntimeState* state, ExprContext* ctx,
|
|
FunctionContext::FunctionStateScope scope) {
|
|
RETURN_IF_ERROR(Expr::open(state, ctx, scope));
|
|
FunctionContext* fn_ctx = ctx->fn_context(_fn_context_index);
|
|
CaseExprState* case_state =
|
|
reinterpret_cast<CaseExprState*>(fn_ctx->allocate(sizeof(CaseExprState)));
|
|
fn_ctx->set_function_state(FunctionContext::THREAD_LOCAL, case_state);
|
|
if (_has_case_expr) {
|
|
case_state->case_val = create_any_val(state->obj_pool(), _children[0]->type());
|
|
case_state->when_val = create_any_val(state->obj_pool(), _children[1]->type());
|
|
} else {
|
|
case_state->case_val = create_any_val(state->obj_pool(), TypeDescriptor(TYPE_BOOLEAN));
|
|
case_state->when_val = create_any_val(state->obj_pool(), _children[0]->type());
|
|
}
|
|
return Status::OK();
|
|
}
|
|
|
|
void CaseExpr::close(RuntimeState* state, ExprContext* ctx,
|
|
FunctionContext::FunctionStateScope scope) {
|
|
if (_fn_context_index != -1) {
|
|
FunctionContext* fn_ctx = ctx->fn_context(_fn_context_index);
|
|
void* case_state = fn_ctx->get_function_state(FunctionContext::THREAD_LOCAL);
|
|
fn_ctx->free(reinterpret_cast<uint8_t*>(case_state));
|
|
}
|
|
Expr::close(state, ctx, scope);
|
|
}
|
|
|
|
std::string CaseExpr::debug_string() const {
|
|
std::stringstream out;
|
|
out << "CaseExpr(has_case_expr=" << _has_case_expr << " has_else_expr=" << _has_else_expr << " "
|
|
<< Expr::debug_string() << ")";
|
|
return out.str();
|
|
}
|
|
|
|
void CaseExpr::get_child_val(int child_idx, ExprContext* ctx, TupleRow* row, AnyVal* dst) {
|
|
switch (_children[child_idx]->type().type) {
|
|
case TYPE_BOOLEAN:
|
|
*reinterpret_cast<BooleanVal*>(dst) = _children[child_idx]->get_boolean_val(ctx, row);
|
|
break;
|
|
case TYPE_TINYINT:
|
|
*reinterpret_cast<TinyIntVal*>(dst) = _children[child_idx]->get_tiny_int_val(ctx, row);
|
|
break;
|
|
case TYPE_SMALLINT:
|
|
*reinterpret_cast<SmallIntVal*>(dst) = _children[child_idx]->get_small_int_val(ctx, row);
|
|
break;
|
|
case TYPE_INT:
|
|
*reinterpret_cast<IntVal*>(dst) = _children[child_idx]->get_int_val(ctx, row);
|
|
break;
|
|
case TYPE_BIGINT:
|
|
*reinterpret_cast<BigIntVal*>(dst) = _children[child_idx]->get_big_int_val(ctx, row);
|
|
break;
|
|
case TYPE_FLOAT:
|
|
*reinterpret_cast<FloatVal*>(dst) = _children[child_idx]->get_float_val(ctx, row);
|
|
break;
|
|
case TYPE_DOUBLE:
|
|
*reinterpret_cast<DoubleVal*>(dst) = _children[child_idx]->get_double_val(ctx, row);
|
|
break;
|
|
case TYPE_DATE:
|
|
case TYPE_DATETIME:
|
|
*reinterpret_cast<DateTimeVal*>(dst) = _children[child_idx]->get_datetime_val(ctx, row);
|
|
break;
|
|
case TYPE_CHAR:
|
|
case TYPE_VARCHAR:
|
|
case TYPE_HLL:
|
|
case TYPE_OBJECT:
|
|
case TYPE_QUANTILE_STATE:
|
|
case TYPE_STRING:
|
|
*reinterpret_cast<StringVal*>(dst) = _children[child_idx]->get_string_val(ctx, row);
|
|
break;
|
|
case TYPE_DECIMALV2:
|
|
*reinterpret_cast<DecimalV2Val*>(dst) = _children[child_idx]->get_decimalv2_val(ctx, row);
|
|
break;
|
|
case TYPE_LARGEINT:
|
|
*reinterpret_cast<LargeIntVal*>(dst) = _children[child_idx]->get_large_int_val(ctx, row);
|
|
break;
|
|
default:
|
|
DCHECK(false) << _children[child_idx]->type();
|
|
}
|
|
}
|
|
|
|
bool CaseExpr::any_val_eq(const TypeDescriptor& type, const AnyVal* v1, const AnyVal* v2) {
|
|
switch (type.type) {
|
|
case TYPE_BOOLEAN:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const BooleanVal*>(v1),
|
|
*reinterpret_cast<const BooleanVal*>(v2));
|
|
case TYPE_TINYINT:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const TinyIntVal*>(v1),
|
|
*reinterpret_cast<const TinyIntVal*>(v2));
|
|
case TYPE_SMALLINT:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const SmallIntVal*>(v1),
|
|
*reinterpret_cast<const SmallIntVal*>(v2));
|
|
case TYPE_INT:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const IntVal*>(v1),
|
|
*reinterpret_cast<const IntVal*>(v2));
|
|
case TYPE_BIGINT:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const BigIntVal*>(v1),
|
|
*reinterpret_cast<const BigIntVal*>(v2));
|
|
case TYPE_FLOAT:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const FloatVal*>(v1),
|
|
*reinterpret_cast<const FloatVal*>(v2));
|
|
case TYPE_DOUBLE:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const DoubleVal*>(v1),
|
|
*reinterpret_cast<const DoubleVal*>(v2));
|
|
case TYPE_DATE:
|
|
case TYPE_DATETIME:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const DateTimeVal*>(v1),
|
|
*reinterpret_cast<const DateTimeVal*>(v2));
|
|
case TYPE_CHAR:
|
|
case TYPE_VARCHAR:
|
|
case TYPE_HLL:
|
|
case TYPE_OBJECT:
|
|
case TYPE_QUANTILE_STATE:
|
|
case TYPE_STRING:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const StringVal*>(v1),
|
|
*reinterpret_cast<const StringVal*>(v2));
|
|
case TYPE_DECIMALV2:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const DecimalV2Val*>(v1),
|
|
*reinterpret_cast<const DecimalV2Val*>(v2));
|
|
case TYPE_LARGEINT:
|
|
return AnyValUtil::equals(type, *reinterpret_cast<const LargeIntVal*>(v1),
|
|
*reinterpret_cast<const LargeIntVal*>(v2));
|
|
default:
|
|
DCHECK(false) << type;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#define CASE_COMPUTE_FN(THEN_TYPE, TYPE_NAME) \
|
|
THEN_TYPE CaseExpr::get_##TYPE_NAME(ExprContext* ctx, TupleRow* row) { \
|
|
FunctionContext* fn_ctx = ctx->fn_context(_fn_context_index); \
|
|
CaseExprState* state = reinterpret_cast<CaseExprState*>( \
|
|
fn_ctx->get_function_state(FunctionContext::THREAD_LOCAL)); \
|
|
DCHECK(state->case_val != nullptr); \
|
|
DCHECK(state->when_val != nullptr); \
|
|
int num_children = _children.size(); \
|
|
if (has_case_expr()) { \
|
|
/* All case and when exprs return the same type */ \
|
|
/* (we guaranteed that during analysis). */ \
|
|
get_child_val(0, ctx, row, state->case_val); \
|
|
} else { \
|
|
/* If there's no case expression, compare the when values to "true". */ \
|
|
*reinterpret_cast<BooleanVal*>(state->case_val) = BooleanVal(true); \
|
|
} \
|
|
if (state->case_val->is_null) { \
|
|
if (has_else_expr()) { \
|
|
/* Return else value. */ \
|
|
return _children[num_children - 1]->get_##TYPE_NAME(ctx, row); \
|
|
} else { \
|
|
return THEN_TYPE::null(); \
|
|
} \
|
|
} \
|
|
int loop_start = has_case_expr() ? 1 : 0; \
|
|
int loop_end = (has_else_expr()) ? num_children - 1 : num_children; \
|
|
for (int i = loop_start; i < loop_end; i += 2) { \
|
|
get_child_val(i, ctx, row, state->when_val); \
|
|
if (state->when_val->is_null) continue; \
|
|
if (any_val_eq(_children[0]->type(), state->case_val, state->when_val)) { \
|
|
/* Return then value. */ \
|
|
return _children[i + 1]->get_##TYPE_NAME(ctx, row); \
|
|
} \
|
|
} \
|
|
if (has_else_expr()) { \
|
|
/* Return else value. */ \
|
|
return _children[num_children - 1]->get_##TYPE_NAME(ctx, row); \
|
|
} \
|
|
return THEN_TYPE::null(); \
|
|
}
|
|
|
|
#define CASE_COMPUTE_FN_WRAPPER(TYPE, TYPE_NAME) CASE_COMPUTE_FN(TYPE, TYPE_NAME)
|
|
|
|
CASE_COMPUTE_FN_WRAPPER(BooleanVal, boolean_val)
|
|
CASE_COMPUTE_FN_WRAPPER(TinyIntVal, tiny_int_val)
|
|
CASE_COMPUTE_FN_WRAPPER(SmallIntVal, small_int_val)
|
|
CASE_COMPUTE_FN_WRAPPER(IntVal, int_val)
|
|
CASE_COMPUTE_FN_WRAPPER(BigIntVal, big_int_val)
|
|
CASE_COMPUTE_FN_WRAPPER(LargeIntVal, large_int_val)
|
|
CASE_COMPUTE_FN_WRAPPER(FloatVal, float_val)
|
|
CASE_COMPUTE_FN_WRAPPER(DoubleVal, double_val)
|
|
CASE_COMPUTE_FN_WRAPPER(StringVal, string_val)
|
|
CASE_COMPUTE_FN_WRAPPER(DateTimeVal, datetime_val)
|
|
CASE_COMPUTE_FN_WRAPPER(DecimalV2Val, decimalv2_val)
|
|
|
|
} // namespace doris
|