75 lines
2.8 KiB
Go
75 lines
2.8 KiB
Go
// Copyright 2025 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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// 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 handle
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import (
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestGenInitStatsHistogramsSQLAllRecords(t *testing.T) {
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// Non-paging with no specific table IDs should load all records.
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opts := newGenHistSQLOptionsForTableIDs(nil)
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got := genInitStatsHistogramsSQL(opts)
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expected := "select /*+ ORDER_INDEX(mysql.stats_histograms,tbl) */ HIGH_PRIORITY " +
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"table_id, is_index, hist_id, distinct_count, version, null_count, cm_sketch, " +
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"tot_col_size, stats_ver, correlation from mysql.stats_histograms order by table_id"
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require.Equal(t, expected, got)
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}
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func TestGenInitStatsHistogramsSQLPaging(t *testing.T) {
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// Paging mode adds a closed-open [start, end) range filter.
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opts := newGenHistSQLOptionsForPaging([2]int64{100, 200})
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got := genInitStatsHistogramsSQL(opts)
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expected := "select /*+ ORDER_INDEX(mysql.stats_histograms,tbl) */ HIGH_PRIORITY " +
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"table_id, is_index, hist_id, distinct_count, version, null_count, cm_sketch, " +
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"tot_col_size, stats_ver, correlation from mysql.stats_histograms" +
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" where table_id >= 100 and table_id < 200 order by table_id"
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require.Equal(t, expected, got)
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}
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func TestGenInitStatsHistogramsSQLTableIDs(t *testing.T) {
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// Non-paging with specific table IDs should produce an IN (...) clause
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// using the provided order.
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ids := []int64{5, 2, 7}
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opts := newGenHistSQLOptionsForTableIDs(ids)
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got := genInitStatsHistogramsSQL(opts)
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expected := "select /*+ ORDER_INDEX(mysql.stats_histograms,tbl) */ HIGH_PRIORITY " +
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"table_id, is_index, hist_id, distinct_count, version, null_count, cm_sketch, " +
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"tot_col_size, stats_ver, correlation from mysql.stats_histograms" +
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" where table_id in (5,2,7) order by table_id"
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require.Equal(t, expected, got)
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}
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func TestGenInitStatsMetaSQLAllRecords(t *testing.T) {
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got := genInitStatsMetaSQL()
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expected := "select HIGH_PRIORITY version, table_id, modify_count, count, snapshot, last_stats_histograms_version from mysql.stats_meta"
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require.Equal(t, expected, got)
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}
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func TestGenInitStatsMetaSQLTableIDs(t *testing.T) {
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got := genInitStatsMetaSQL(5, 2, 7)
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expected := "select HIGH_PRIORITY version, table_id, modify_count, count, snapshot, last_stats_histograms_version from mysql.stats_meta" +
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" where table_id in (5,2,7)"
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require.Equal(t, expected, got)
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}
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