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feat: add explain analyze to multiway merge operator

This commit is contained in:
shenglian zhou 2022-06-13 09:56:39 +08:00
parent 80a29a6a31
commit 253cd955a1
1 changed files with 33 additions and 0 deletions
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33
source/libs/command/src/explain.c
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@ -878,6 +878,39 @@ int32_t qExplainResNodeToRowsImpl(SExplainResNode *pResNode, SExplainCtx *ctx, i
EXPLAIN_ROW_APPEND(EXPLAIN_RIGHT_PARENTHESIS_FORMAT);
EXPLAIN_ROW_END();
QRY_ERR_RET(qExplainResAppendRow(ctx, tbuf, tlen, level));
if (EXPLAIN_MODE_ANALYZE == ctx->mode) {
// sort key
EXPLAIN_ROW_NEW(level + 1, "Sort Key: ");
if (pResNode->pExecInfo) {
for (int32_t i = 0; i < LIST_LENGTH(pMergeNode->pMergeKeys); ++i) {
SOrderByExprNode *ptn = nodesListGetNode(pMergeNode->pMergeKeys, i);
EXPLAIN_ROW_APPEND("%s ", nodesGetNameFromColumnNode(ptn->pExpr));
}
}
EXPLAIN_ROW_END();
QRY_ERR_RET(qExplainResAppendRow(ctx, tbuf, tlen, level));
// sort method
EXPLAIN_ROW_NEW(level + 1, "Sort Method: ");
int32_t nodeNum = taosArrayGetSize(pResNode->pExecInfo);
SExplainExecInfo *execInfo = taosArrayGet(pResNode->pExecInfo, 0);
SSortExecInfo *pExecInfo = (SSortExecInfo *)execInfo->verboseInfo;
EXPLAIN_ROW_APPEND("%s", pExecInfo->sortMethod == SORT_QSORT_T ? "quicksort" : "merge sort");
if (pExecInfo->sortBuffer > 1024 * 1024) {
EXPLAIN_ROW_APPEND(" Buffers:%.2f Mb", pExecInfo->sortBuffer / (1024 * 1024.0));
} else if (pExecInfo->sortBuffer > 1024) {
EXPLAIN_ROW_APPEND(" Buffers:%.2f Kb", pExecInfo->sortBuffer / (1024.0));
} else {
EXPLAIN_ROW_APPEND(" Buffers:%d b", pExecInfo->sortBuffer);
}
EXPLAIN_ROW_APPEND(" loops:%d", pExecInfo->loops);
EXPLAIN_ROW_END();
QRY_ERR_RET(qExplainResAppendRow(ctx, tbuf, tlen, level));
}
if (verbose) {
EXPLAIN_ROW_NEW(level + 1, EXPLAIN_OUTPUT_FORMAT);