builtin_op_vec.go

// Copyright 2019 PingCAP, Inc.
//
// Licensed 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,
// See the License for the specific language governing permissions and
// limitations under the License.

package expression

import (
	"fmt"
	"math"

	"github.com/pingcap/tidb/parser/mysql"
	"github.com/pingcap/tidb/types"
	"github.com/pingcap/tidb/util/chunk"
)

func (b *builtinLogicOrSig) vectorized() bool {
	return true
}

func (b *builtinLogicOrSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
	if err := b.args[0].VecEvalInt(b.ctx, input, result); err != nil {
		return err
	}

	n := input.NumRows()
	buf, err := b.bufAllocator.get(types.ETInt, n)
	if err != nil {
		return err
	}
	defer b.bufAllocator.put(buf)
	if err := b.args[1].VecEvalInt(b.ctx, input, buf); err != nil {
		return err
	}

	i64s := result.Int64s()
	arg1s := buf.Int64s()

	for i := 0; i < n; i++ {
		isNull0 := result.IsNull(i)
		isNull1 := buf.IsNull(i)
		// Because buf is used to store the conversion of args[0] in place, it could
		// be that args[0] is null and args[1] is nonzero, in which case the result
		// is 1. In these cases, we need to clear the null bit mask of the corresponding
		// row in result.
		// See https://dev.mysql.com/doc/refman/5.7/en/logical-operators.html#operator_or
		isNull := false
		if (!isNull0 && i64s[i] != 0) || (!isNull1 && arg1s[i] != 0) {
			i64s[i] = 1
		} else if isNull0 || isNull1 {
			isNull = true
		} else {
			i64s[i] = 0
		}
		if isNull != isNull0 {
			result.SetNull(i, isNull)
		}
	}
	return nil
}

func (b *builtinUnaryMinusRealSig) vectorized() bool {
	return true
}

func (b *builtinUnaryMinusRealSig) vecEvalReal(input *chunk.Chunk, result *chunk.Column) error {
	var err error
	if err = b.args[0].VecEvalReal(b.ctx, input, result); err != nil {
		return err
	}

	n := input.NumRows()
	f64s := result.Float64s()
	for i := 0; i < n; i++ {
		f64s[i] = -f64s[i]
	}
	return nil
}

func (b *builtinIntIsNullSig) vectorized() bool {
	return true
}

func (b *builtinIntIsNullSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
	if err := b.args[0].VecEvalInt(b.ctx, input, result); err != nil {
		return err
	}

	i64s := result.Int64s()
	for i := 0; i < len(i64s); i++ {
		if result.IsNull(i) {
			i64s[i] = 1
			result.SetNull(i, false)
		} else {
			i64s[i] = 0
		}
	}
	return nil
}

func (b *builtinRealIsNullSig) vectorized() bool {
	return true
}

func (b *builtinRealIsNullSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
	numRows := input.NumRows()
	buf, err := b.bufAllocator.get(types.ETReal, numRows)
	if err != nil {
		return err
	}
	defer b.bufAllocator.put(buf)

	if err := b.args[0].VecEvalReal(b.ctx, input, buf); err != nil {
		return err
	}

	result.ResizeInt64(numRows, false)
	i64s := result.Int64s()
	for i := 0; i < numRows; i++ {
		if buf.IsNull(i) {
			i64s[i] = 1
		} else {
			i64s[i] = 0
		}
	}
	return nil
}

func (b *builtinUnaryNotRealSig) vectorized() bool {
	return true
}

func (b *builtinUnaryNotRealSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
	n := input.NumRows()
	buf, err := b.bufAllocator.get(types.ETReal, n)
	if err != nil {
		return err
	}
	defer b.bufAllocator.put(buf)
	if err := b.args[0].VecEvalReal(b.ctx, input, buf); err != nil {
		return err
	}
	f64s := buf.Float64s()

	result.ResizeInt64(n, false)
	result.MergeNulls(buf)
	i64s := result.Int64s()
	for i := 0; i < n; i++ {
		if result.IsNull(i) {
			continue
		}
		if f64s[i] == 0 {
			i64s[i] = 1
		} else {
			i64s[i] = 0
		}
	}
	return nil
}

func (b *builtinLogicAndSig) vectorized() bool {
	return true
}

func (b *builtinLogicAndSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
	n := input.NumRows()

	if err := b.args[0].VecEvalInt(b.ctx, input, result); err != nil {
		return err
	}

	buf1, err := b.bufAllocator.get(types.ETInt, n)
	if err != nil {
		return err
	}
	defer b.bufAllocator.put(buf1)
	if err := b.args[1].VecEvalInt(b.ctx, input, buf1); err != nil {
		return err
	}

	i64s := result.Int64s()
	arg1 := buf1.Int64s()

	for i := 0; i < n; i++ {
		isNull0 := result.IsNull(i)
		if !isNull0 && i64s[i] == 0 {
			result.SetNull(i, false)
			continue
		}

		isNull1 := buf1.IsNull(i)
		if !isNull1 && arg1[i] == 0 {
			i64s[i] = 0
			result.SetNull(i, false)
			continue
		}

		if isNull0 || isNull1 {
			result.SetNull(i, true)
			continue
		}

		i64s[i] = 1
	}

	return nil
}

func (b *builtinUnaryMinusIntSig) vectorized() bool {
	return true
}

func (b *builtinUnaryMinusIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
	if err := b.args[0].VecEvalInt(b.ctx, input, result); err != nil {
		return err
	}
	n := input.NumRows()
	args := result.Int64s()
	if mysql.HasUnsignedFlag(b.args[0].GetType().Flag) {
		for i := 0; i < n; i++ {
			if uint64(args[i]) > uint64(-math.MinInt64) {
				return types.ErrOverflow.GenWithStackByArgs("BIGINT", fmt.Sprintf("-%v", uint64(args[i])))
			}
			args[i] = -args[i]
		}
	} else {
		for i := 0; i < n; i++ {
			if args[i] == math.MinInt64 {
				return types.ErrOverflow.GenWithStackByArgs("BIGINT", fmt.Sprintf("-%v", args[i]))
			}
			args[i] = -args[i]
		}
	}
	return nil
}

func (b *builtinUnaryNotIntSig) vectorized() bool {
	return true
}

func (b *builtinUnaryNotIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
	n := input.NumRows()
	if err := b.args[0].VecEvalInt(b.ctx, input, result); err != nil {
		return err
	}

	i64s := result.Int64s()
	for i := 0; i < n; i++ {
		if result.IsNull(i) {
			continue
		}
		if i64s[i] == 0 {
			i64s[i] = 1
		} else {
			i64s[i] = 0
		}
	}
	return nil
}