98 lines
3.1 KiB
Go
98 lines
3.1 KiB
Go
// Copyright 2018 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package aggfuncs
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import (
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"github.com/pingcap/tidb/ast"
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"github.com/pingcap/tidb/expression/aggregation"
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)
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// Build is used to build a specific AggFunc implementation according to the
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// input aggFuncDesc.
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func Build(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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switch aggFuncDesc.Name {
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case ast.AggFuncCount:
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return buildCount(aggFuncDesc, ordinal)
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case ast.AggFuncSum:
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return buildSum(aggFuncDesc, ordinal)
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case ast.AggFuncAvg:
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return buildAvg(aggFuncDesc, ordinal)
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case ast.AggFuncFirstRow:
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return buildFirstRow(aggFuncDesc, ordinal)
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case ast.AggFuncMax:
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return buildMax(aggFuncDesc, ordinal)
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case ast.AggFuncMin:
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return buildMin(aggFuncDesc, ordinal)
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case ast.AggFuncGroupConcat:
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return buildGroupConcat(aggFuncDesc, ordinal)
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case ast.AggFuncBitOr:
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return buildBitOr(aggFuncDesc, ordinal)
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case ast.AggFuncBitXor:
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return buildBitXor(aggFuncDesc, ordinal)
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case ast.AggFuncBitAnd:
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return buildBitAnd(aggFuncDesc, ordinal)
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}
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return nil
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}
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// buildCount builds the AggFunc implementation for function "COUNT".
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func buildCount(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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// buildCount builds the AggFunc implementation for function "SUM".
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func buildSum(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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// buildCount builds the AggFunc implementation for function "AVG".
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func buildAvg(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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// buildCount builds the AggFunc implementation for function "FIRST_ROW".
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func buildFirstRow(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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// buildCount builds the AggFunc implementation for function "MAX".
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func buildMax(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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// buildCount builds the AggFunc implementation for function "MIN".
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func buildMin(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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// buildCount builds the AggFunc implementation for function "GROUP_CONCAT".
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func buildGroupConcat(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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// buildCount builds the AggFunc implementation for function "BIT_OR".
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func buildBitOr(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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// buildCount builds the AggFunc implementation for function "BIT_XOR".
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func buildBitXor(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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// buildCount builds the AggFunc implementation for function "BIT_AND".
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func buildBitAnd(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
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return nil
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}
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