wehub-resource-sync
50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
// Copyright 2023 Dolthub, 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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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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 schema
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import (
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"github.com/dolthub/go-mysql-server/sql"
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sqltypes "github.com/dolthub/go-mysql-server/sql/types"
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)
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func SchemaAvgLength(schema sql.Schema) uint64 {
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var numBytesPerRow uint64 = 0
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for _, col := range schema {
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switch n := col.Type.(type) {
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case sql.NumberType:
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numBytesPerRow += 8
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case sql.StringType:
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numBytesPerRow += uint64(n.MaxByteLength())
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case sqltypes.BitType:
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numBytesPerRow += 8
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case sql.DatetimeType:
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numBytesPerRow += 8
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case sql.DecimalType:
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numBytesPerRow += uint64(n.MaximumScale())
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case sql.EnumType:
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numBytesPerRow += 2
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case sqltypes.JsonType:
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numBytesPerRow += 20
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case sql.NullType:
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numBytesPerRow += 1
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case sqltypes.TimeType:
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numBytesPerRow += 16
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case sql.YearType:
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numBytesPerRow += 8
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}
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}
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return numBytesPerRow
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}
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