Kikyou1997 commented on code in PR #25079:
URL: https://github.com/apache/doris/pull/25079#discussion_r1349894796
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fe/fe-core/src/main/java/org/apache/doris/statistics/BaseAnalysisTask.java:
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@@ -222,23 +226,23 @@ protected String getDataSizeFunction(Column column) {
return "COUNT(1) * " + column.getType().getSlotSize();
}
- protected String getSampleExpression() {
+ protected TableSample getTableSample() {
if (info.forceFull) {
- return "";
+ return null;
}
- int sampleRows = info.sampleRows;
+ long sampleRows = info.sampleRows;
if (info.analysisMethod == AnalysisMethod.FULL) {
if (Config.enable_auto_sample
&& tbl.getDataSize(true) >
Config.huge_table_lower_bound_size_in_bytes) {
sampleRows = Config.huge_table_default_sample_rows;
} else {
- return "";
+ return null;
}
}
if (info.samplePercent > 0) {
- return String.format("TABLESAMPLE(%d PERCENT)",
info.samplePercent);
+ return new TableSample(true, (long) info.samplePercent);
Review Comment:
1. Sample percent doesn't have higher priority, we sample by rows by
default, if user set sample by percent explicitly then sample by percent, docs
has already explained this
2. sample rows by default has been fully discussed in the group
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