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taosdata / TDengine / #3585

20 Jan 2025 09:22AM UTC coverage: 63.647% (-0.1%) from 63.756%
#3585

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Merge pull request #29603 from taosdata/enh/3.0/TD-32588

enh:[TD-32588]refactor stmt-async-bind loop usleep to Producer Consumer Model

140935 of 284561 branches covered (49.53%)

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219502 of 281745 relevant lines covered (77.91%)

18611836.92 hits per line

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79.23
/source/dnode/mnode/impl/src/mndShow.c
1
/*
2
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
3
 *
4
 * This program is free software: you can use, redistribute, and/or modify
5
 * it under the terms of the GNU Affero General Public License, version 3
6
 * or later ("AGPL"), as published by the Free Software Foundation.
7
 *
8
 * This program is distributed in the hope that it will be useful, but WITHOUT
9
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10
 * FITNESS FOR A PARTICULAR PURPOSE.
11
 *
12
 * You should have received a copy of the GNU Affero General Public License
13
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
14
 */
15

16
#define _DEFAULT_SOURCE
17
#include "mndShow.h"
18
#include "mndPrivilege.h"
19
#include "mndUser.h"
20
#include "systable.h"
21

22
#define SHOW_STEP_SIZE            100
23
#define SHOW_COLS_STEP_SIZE       4096
24
#define SHOW_PRIVILEGES_STEP_SIZE 2048
25

26
static SShowObj *mndCreateShowObj(SMnode *pMnode, SRetrieveTableReq *pReq);
27
static void      mndFreeShowObj(SShowObj *pShow);
28
static SShowObj *mndAcquireShowObj(SMnode *pMnode, int64_t showId);
29
static void      mndReleaseShowObj(SShowObj *pShow, bool forceRemove);
30
static bool      mndCheckRetrieveFinished(SShowObj *pShow);
31
static int32_t   mndProcessRetrieveSysTableReq(SRpcMsg *pReq);
32

33
int32_t mndInitShow(SMnode *pMnode) {
1,735✔
34
  int32_t    code = 0;
1,735✔
35
  SShowMgmt *pMgmt = &pMnode->showMgmt;
1,735✔
36

37
  pMgmt->cache = taosCacheInit(TSDB_DATA_TYPE_INT, 5000, true, (__cache_free_fn_t)mndFreeShowObj, "show");
1,735✔
38
  if (pMgmt->cache == NULL) {
1,735!
39
    code = TSDB_CODE_OUT_OF_MEMORY;
×
40
    mError("failed to alloc show cache since %s", tstrerror(code));
×
41
    TAOS_RETURN(code);
×
42
  }
43

44
  mndSetMsgHandle(pMnode, TDMT_MND_SYSTABLE_RETRIEVE, mndProcessRetrieveSysTableReq);
1,735✔
45
  TAOS_RETURN(code);
1,735✔
46
}
47

48
void mndCleanupShow(SMnode *pMnode) {
1,734✔
49
  SShowMgmt *pMgmt = &pMnode->showMgmt;
1,734✔
50
  if (pMgmt->cache != NULL) {
1,734!
51
    taosCacheCleanup(pMgmt->cache);
1,734✔
52
    pMgmt->cache = NULL;
1,734✔
53
  }
54
}
1,734✔
55

56
static int32_t convertToRetrieveType(char *name, int32_t len) {
217,877✔
57
  int32_t type = -1;
217,877✔
58

59
  if (strncasecmp(name, TSDB_INS_TABLE_DNODES, len) == 0) {
217,877✔
60
    type = TSDB_MGMT_TABLE_DNODE;
7,269✔
61
  } else if (strncasecmp(name, TSDB_INS_TABLE_MNODES, len) == 0) {
210,608✔
62
    type = TSDB_MGMT_TABLE_MNODE;
4,475✔
63
    /*
64
      } else if (strncasecmp(name, TSDB_INS_TABLE_MODULES, len) == 0) {
65
        type = TSDB_MGMT_TABLE_MODULE;
66
    */
67
  } else if (strncasecmp(name, TSDB_INS_TABLE_QNODES, len) == 0) {
206,133✔
68
    type = TSDB_MGMT_TABLE_QNODE;
2,194✔
69
  } else if (strncasecmp(name, TSDB_INS_TABLE_SNODES, len) == 0) {
203,939✔
70
    type = TSDB_MGMT_TABLE_SNODE;
2,194✔
71
  } else if (strncasecmp(name, TSDB_INS_TABLE_ANODES, len) == 0) {
201,745✔
72
    type = TSDB_MGMT_TABLE_ANODE;
3✔
73
  } else if (strncasecmp(name, TSDB_INS_TABLE_ANODES_FULL, len) == 0) {
201,742✔
74
    type = TSDB_MGMT_TABLE_ANODE_FULL;
1✔
75
  } else if (strncasecmp(name, TSDB_INS_TABLE_ARBGROUPS, len) == 0) {
201,741!
76
    type = TSDB_MGMT_TABLE_ARBGROUP;
×
77
  } else if (strncasecmp(name, TSDB_INS_TABLE_CLUSTER, len) == 0) {
201,741✔
78
    type = TSDB_MGMT_TABLE_CLUSTER;
4,318✔
79
  } else if (strncasecmp(name, TSDB_INS_TABLE_DATABASES, len) == 0) {
197,423✔
80
    type = TSDB_MGMT_TABLE_DB;
27,536✔
81
  } else if (strncasecmp(name, TSDB_INS_TABLE_FUNCTIONS, len) == 0) {
169,887✔
82
    type = TSDB_MGMT_TABLE_FUNC;
7,240✔
83
  } else if (strncasecmp(name, TSDB_INS_TABLE_INDEXES, len) == 0) {
162,647✔
84
    type = TSDB_MGMT_TABLE_INDEX;
6,761✔
85
  } else if (strncasecmp(name, TSDB_INS_TABLE_STABLES, len) == 0) {
155,886✔
86
    type = TSDB_MGMT_TABLE_STB;
8,413✔
87
  } else if (strncasecmp(name, TSDB_INS_TABLE_TABLES, len) == 0) {
147,473!
88
    type = TSDB_MGMT_TABLE_TABLE;
×
89
  } else if (strncasecmp(name, TSDB_INS_TABLE_TAGS, len) == 0) {
147,473!
90
    type = TSDB_MGMT_TABLE_TAG;
×
91
  } else if (strncasecmp(name, TSDB_INS_TABLE_COLS, len) == 0) {
147,473✔
92
    type = TSDB_MGMT_TABLE_COL;
13,312✔
93
  } else if (strncasecmp(name, TSDB_INS_TABLE_TABLE_DISTRIBUTED, len) == 0) {
134,161✔
94
    //    type = TSDB_MGMT_TABLE_DIST;
95
  } else if (strncasecmp(name, TSDB_INS_TABLE_USERS, len) == 0) {
134,090✔
96
    type = TSDB_MGMT_TABLE_USER;
5,067✔
97
  } else if (strncasecmp(name, TSDB_INS_TABLE_USERS_FULL, len) == 0) {
129,023!
98
    type = TSDB_MGMT_TABLE_USER_FULL;
×
99
  } else if (strncasecmp(name, TSDB_INS_TABLE_LICENCES, len) == 0) {
129,023✔
100
    type = TSDB_MGMT_TABLE_GRANTS;
5,751✔
101
  } else if (strncasecmp(name, TSDB_INS_TABLE_VGROUPS, len) == 0) {
123,272✔
102
    type = TSDB_MGMT_TABLE_VGROUP;
10,664✔
103
  } else if (strncasecmp(name, TSDB_PERFS_TABLE_CONSUMERS, len) == 0) {
112,608✔
104
    type = TSDB_MGMT_TABLE_CONSUMERS;
7,995✔
105
  } else if (strncasecmp(name, TSDB_INS_TABLE_SUBSCRIPTIONS, len) == 0) {
104,613✔
106
    type = TSDB_MGMT_TABLE_SUBSCRIPTIONS;
5,852✔
107
  } else if (strncasecmp(name, TSDB_PERFS_TABLE_TRANS, len) == 0) {
98,761✔
108
    type = TSDB_MGMT_TABLE_TRANS;
7,464✔
109
  } else if (strncasecmp(name, TSDB_PERFS_TABLE_SMAS, len) == 0) {
91,297!
110
    type = TSDB_MGMT_TABLE_SMAS;
×
111
  } else if (strncasecmp(name, TSDB_INS_TABLE_CONFIGS, len) == 0) {
91,297✔
112
    type = TSDB_MGMT_TABLE_CONFIGS;
1,442✔
113
  } else if (strncasecmp(name, TSDB_PERFS_TABLE_CONNECTIONS, len) == 0) {
89,855✔
114
    type = TSDB_MGMT_TABLE_CONNS;
6,511✔
115
  } else if (strncasecmp(name, TSDB_PERFS_TABLE_QUERIES, len) == 0) {
83,344✔
116
    type = TSDB_MGMT_TABLE_QUERIES;
11,517✔
117
  } else if (strncasecmp(name, TSDB_INS_TABLE_VNODES, len) == 0) {
71,827✔
118
    type = TSDB_MGMT_TABLE_VNODES;
5,149✔
119
  } else if (strncasecmp(name, TSDB_INS_TABLE_TOPICS, len) == 0) {
66,678✔
120
    type = TSDB_MGMT_TABLE_TOPICS;
5,067✔
121
  } else if (strncasecmp(name, TSDB_INS_TABLE_STREAMS, len) == 0) {
61,611✔
122
    type = TSDB_MGMT_TABLE_STREAMS;
11,255✔
123
  } else if (strncasecmp(name, TSDB_PERFS_TABLE_APPS, len) == 0) {
50,356✔
124
    type = TSDB_MGMT_TABLE_APPS;
10,794✔
125
  } else if (strncasecmp(name, TSDB_INS_TABLE_STREAM_TASKS, len) == 0) {
39,562✔
126
    type = TSDB_MGMT_TABLE_STREAM_TASKS;
20,649✔
127
  } else if (strncasecmp(name, TSDB_INS_TABLE_USER_PRIVILEGES, len) == 0) {
18,913✔
128
    type = TSDB_MGMT_TABLE_PRIVILEGES;
4,335✔
129
  } else if (strncasecmp(name, TSDB_INS_TABLE_VIEWS, len) == 0) {
14,578✔
130
    type = TSDB_MGMT_TABLE_VIEWS;
6,530✔
131
  } else if (strncasecmp(name, TSDB_INS_TABLE_COMPACTS, len) == 0) {
8,048✔
132
    type = TSDB_MGMT_TABLE_COMPACT;
2,239✔
133
  } else if (strncasecmp(name, TSDB_INS_TABLE_COMPACT_DETAILS, len) == 0) {
5,809✔
134
    type = TSDB_MGMT_TABLE_COMPACT_DETAIL;
5,746✔
135
  } else if (strncasecmp(name, TSDB_INS_TABLE_TRANSACTION_DETAILS, len) == 0) {
63!
136
    type = TSDB_MGMT_TABLE_TRANSACTION_DETAIL;
×
137
  } else if (strncasecmp(name, TSDB_INS_TABLE_GRANTS_FULL, len) == 0) {
63✔
138
    type = TSDB_MGMT_TABLE_GRANTS_FULL;
6✔
139
  } else if (strncasecmp(name, TSDB_INS_TABLE_GRANTS_LOGS, len) == 0) {
57✔
140
    type = TSDB_MGMT_TABLE_GRANTS_LOGS;
6✔
141
  } else if (strncasecmp(name, TSDB_INS_TABLE_MACHINES, len) == 0) {
51✔
142
    type = TSDB_MGMT_TABLE_MACHINES;
6✔
143
  } else if (strncasecmp(name, TSDB_INS_TABLE_ENCRYPTIONS, len) == 0) {
45!
144
    type = TSDB_MGMT_TABLE_ENCRYPTIONS;
×
145
  } else if (strncasecmp(name, TSDB_INS_TABLE_TSMAS, len) == 0) {
45✔
146
    type = TSDB_MGMT_TABLE_TSMAS;
6✔
147
  } else if (strncasecmp(name, TSDB_INS_DISK_USAGE, len) == 0) {
39!
148
    type = TSDB_MGMT_TABLE_USAGE;
×
149
  } else if (strncasecmp(name, TSDB_INS_TABLE_FILESETS, len) == 0) {
39!
150
    type = TSDB_MGMT_TABLE_FILESETS;
×
151
  } else {
152
    mError("invalid show name:%s len:%d", name, len);
39!
153
  }
154

155
  return type;
217,794✔
156
}
157

158
static SShowObj *mndCreateShowObj(SMnode *pMnode, SRetrieveTableReq *pReq) {
217,817✔
159
  SShowMgmt *pMgmt = &pMnode->showMgmt;
217,817✔
160

161
  int64_t showId = atomic_add_fetch_64(&pMgmt->showId, 1);
217,817✔
162
  if (showId == 0) atomic_add_fetch_64(&pMgmt->showId, 1);
218,120!
163

164
  int32_t size = sizeof(SShowObj);
218,120✔
165

166
  SShowObj showObj = {0};
218,120✔
167

168
  showObj.id = showId;
218,120✔
169
  showObj.pMnode = pMnode;
218,120✔
170
  showObj.type = convertToRetrieveType(pReq->tb, tListLen(pReq->tb));
218,120✔
171
  (void)memcpy(showObj.db, pReq->db, TSDB_DB_FNAME_LEN);
217,838✔
172
  tstrncpy(showObj.filterTb, pReq->filterTb, TSDB_TABLE_NAME_LEN);
217,838✔
173

174
  int32_t   keepTime = tsShellActivityTimer * 6 * 1000;
217,838✔
175
  SShowObj *pShow = taosCachePut(pMgmt->cache, &showId, sizeof(int64_t), &showObj, size, keepTime);
217,838✔
176
  if (pShow == NULL) {
218,060!
177
    terrno = TSDB_CODE_OUT_OF_MEMORY;
×
178
    mError("show:0x%" PRIx64 ", failed to put into cache since %s", showId, terrstr());
×
179
    return NULL;
×
180
  }
181

182
  mTrace("show:0x%" PRIx64 ", is created, data:%p", showId, pShow);
218,060✔
183
  return pShow;
218,033✔
184
}
185

186
static void mndFreeShowObj(SShowObj *pShow) {
218,157✔
187
  SMnode    *pMnode = pShow->pMnode;
218,157✔
188
  SShowMgmt *pMgmt = &pMnode->showMgmt;
218,157✔
189

190
  ShowFreeIterFp freeFp = pMgmt->freeIterFps[pShow->type];
218,157✔
191
  if (freeFp != NULL) {
218,157✔
192
    if (pShow->pIter != NULL) {
204,295!
193
      mTrace("show:0x%" PRIx64 ", is destroying, data:%p, pIter:%p, ", pShow->id, pShow, pShow->pIter);
×
194

195
      (*freeFp)(pMnode, pShow->pIter);
×
196

197
      pShow->pIter = NULL;
×
198
    }
199
  }
200

201
  mTrace("show:0x%" PRIx64 ", is destroyed, data:%p", pShow->id, pShow);
218,157✔
202
}
218,157✔
203

204
static SShowObj *mndAcquireShowObj(SMnode *pMnode, int64_t showId) {
7,905✔
205
  SShowMgmt *pMgmt = &pMnode->showMgmt;
7,905✔
206

207
  SShowObj *pShow = taosCacheAcquireByKey(pMgmt->cache, &showId, sizeof(showId));
7,905✔
208
  if (pShow == NULL) {
7,907!
209
    mError("show:0x%" PRIx64 ", already destroyed", showId);
×
210
    return NULL;
×
211
  }
212

213
  mTrace("show:0x%" PRIx64 ", acquired from cache, data:%p", pShow->id, pShow);
7,907!
214
  return pShow;
7,907✔
215
}
216

217
static void mndReleaseShowObj(SShowObj *pShow, bool forceRemove) {
225,812✔
218
  if (pShow == NULL) return;
225,812!
219
  mTrace("show:0x%" PRIx64 ", released from cache, data:%p force:%d", pShow->id, pShow, forceRemove);
225,812✔
220

221
  // A bug in tcache.c
222
  forceRemove = 0;
225,812✔
223

224
  SMnode    *pMnode = pShow->pMnode;
225,812✔
225
  SShowMgmt *pMgmt = &pMnode->showMgmt;
225,812✔
226
  taosCacheRelease(pMgmt->cache, (void **)(&pShow), forceRemove);
225,812✔
227
}
228

229
static int32_t mndProcessRetrieveSysTableReq(SRpcMsg *pReq) {
225,932✔
230
  int32_t    code = 0;
225,932✔
231
  SMnode    *pMnode = pReq->info.node;
225,932✔
232
  SShowMgmt *pMgmt = &pMnode->showMgmt;
225,932✔
233
  SShowObj  *pShow = NULL;
225,932✔
234
  int32_t    rowsToRead = SHOW_STEP_SIZE;
225,932✔
235
  int32_t    size = 0;
225,932✔
236
  int32_t    rowsRead = 0;
225,932✔
237
  mDebug("mndProcessRetrieveSysTableReq start");
225,932✔
238
  SRetrieveTableReq retrieveReq = {0};
225,932✔
239
  TAOS_CHECK_RETURN(tDeserializeSRetrieveTableReq(pReq->pCont, pReq->contLen, &retrieveReq));
225,932✔
240

241
  mDebug("process to retrieve systable req db:%s, tb:%s, compactId:%" PRId64, retrieveReq.db, retrieveReq.tb,
225,866✔
242
         retrieveReq.compactId);
243

244
  if (retrieveReq.showId == 0) {
225,937✔
245
    STableMetaRsp *pMeta = taosHashGet(pMnode->infosMeta, retrieveReq.tb, strlen(retrieveReq.tb));
218,031✔
246
    if (pMeta == NULL) {
217,968✔
247
      pMeta = taosHashGet(pMnode->perfsMeta, retrieveReq.tb, strlen(retrieveReq.tb));
44,318✔
248
      if (pMeta == NULL) {
44,336!
249
        code = TSDB_CODE_PAR_TABLE_NOT_EXIST;
×
250
        mError("failed to process show-retrieve req:%p since %s", pShow, tstrerror(code));
×
251
        TAOS_RETURN(code);
×
252
      }
253
    }
254

255
    pShow = mndCreateShowObj(pMnode, &retrieveReq);
217,986✔
256
    if (pShow == NULL) {
217,987✔
257
      code = terrno;
21✔
258
      mError("failed to process show-meta req since %s", tstrerror(code));
×
259
      TAOS_RETURN(code);
×
260
    }
261

262
    pShow->pMeta = pMeta;
217,966✔
263
    pShow->numOfColumns = pShow->pMeta->numOfColumns;
217,966✔
264
  } else {
265
    pShow = mndAcquireShowObj(pMnode, retrieveReq.showId);
7,906✔
266
    if (pShow == NULL) {
7,905✔
267
      code = TSDB_CODE_MND_INVALID_SHOWOBJ;
75✔
268
      mError("failed to process show-retrieve req:%p since %s", pShow, tstrerror(code));
75!
269
      TAOS_RETURN(code);
75✔
270
    }
271
  }
272

273
  if (pShow->type == TSDB_MGMT_TABLE_COL) {  // expend capacity for ins_columns
225,796✔
274
    rowsToRead = SHOW_COLS_STEP_SIZE;
13,312✔
275
  } else if (pShow->type == TSDB_MGMT_TABLE_PRIVILEGES) {
212,484✔
276
    rowsToRead = SHOW_PRIVILEGES_STEP_SIZE;
4,337✔
277
  }
278
  ShowRetrieveFp retrieveFp = pMgmt->retrieveFps[pShow->type];
225,796✔
279
  if (retrieveFp == NULL) {
225,796!
280
    mndReleaseShowObj(pShow, false);
×
281
    code = TSDB_CODE_MSG_NOT_PROCESSED;
×
282
    mError("show:0x%" PRIx64 ", failed to retrieve data since %s", pShow->id, tstrerror(code));
×
283
    TAOS_RETURN(code);
×
284
  }
285

286
  mDebug("show:0x%" PRIx64 ", start retrieve data, type:%d", pShow->id, pShow->type);
225,796✔
287
  if (retrieveReq.user[0] != 0) {
225,682✔
288
    (void)memcpy(pReq->info.conn.user, retrieveReq.user, TSDB_USER_LEN);
225,660✔
289
  } else {
290
    (void)memcpy(pReq->info.conn.user, TSDB_DEFAULT_USER, strlen(TSDB_DEFAULT_USER) + 1);
22✔
291
  }
292
  code = -1;
225,682✔
293
  if (retrieveReq.db[0] &&
228,459✔
294
      (code = mndCheckShowPrivilege(pMnode, pReq->info.conn.user, pShow->type, retrieveReq.db)) != 0) {
2,777✔
295
    TAOS_RETURN(code);
4✔
296
  }
297
  if (pShow->type == TSDB_MGMT_TABLE_USER_FULL) {
225,678!
298
    if (strcmp(pReq->info.conn.user, "root") != 0) {
×
299
      mError("The operation is not permitted, user:%s, pShow->type:%d", pReq->info.conn.user, pShow->type);
×
300
      code = TSDB_CODE_MND_NO_RIGHTS;
×
301
      TAOS_RETURN(code);
×
302
    }
303
  }
304

305
  int32_t numOfCols = pShow->pMeta->numOfColumns;
225,678✔
306

307
  SSDataBlock *pBlock = NULL;
225,678✔
308
  code = createDataBlock(&pBlock);
225,678✔
309
  if (code) {
225,785!
310
    TAOS_RETURN(code);
×
311
  }
312

313
  for (int32_t i = 0; i < numOfCols; ++i) {
3,499,553✔
314
    SColumnInfoData idata = {0};
3,273,234✔
315

316
    SSchema *p = &pShow->pMeta->pSchemas[i];
3,273,234✔
317

318
    idata.info.bytes = p->bytes;
3,273,234✔
319
    idata.info.type = p->type;
3,273,234✔
320
    idata.info.colId = p->colId;
3,273,234✔
321
    TAOS_CHECK_RETURN(blockDataAppendColInfo(pBlock, &idata));
3,273,234!
322
  }
323

324
  TAOS_CHECK_RETURN(blockDataEnsureCapacity(pBlock, rowsToRead));
226,319!
325

326
  if (mndCheckRetrieveFinished(pShow)) {
225,897!
327
    mDebug("show:0x%" PRIx64 ", read finished, numOfRows:%d", pShow->id, pShow->numOfRows);
×
328
    rowsRead = 0;
×
329
  } else {
330
    rowsRead = (*retrieveFp)(pReq, pShow, pBlock, rowsToRead);
225,891✔
331
    if (rowsRead < 0) {
225,976✔
332
      code = rowsRead;
3✔
333
      mDebug("show:0x%" PRIx64 ", retrieve completed", pShow->id);
3!
334
      mndReleaseShowObj(pShow, true);
3✔
335
      blockDataDestroy(pBlock);
3✔
336
      TAOS_RETURN(code);
3✔
337
    }
338

339
    pBlock->info.rows = rowsRead;
225,973✔
340
    mDebug("show:0x%" PRIx64 ", stop retrieve data, rowsRead:%d numOfRows:%d", pShow->id, rowsRead, pShow->numOfRows);
225,973✔
341
  }
342

343
  size_t dataEncodeBufSize = blockGetEncodeSize(pBlock);
225,973✔
344
  size = sizeof(SRetrieveMetaTableRsp) + sizeof(int32_t) + sizeof(SSysTableSchema) * pShow->pMeta->numOfColumns +
225,855✔
345
         dataEncodeBufSize;
346

347
  SRetrieveMetaTableRsp *pRsp = rpcMallocCont(size);
225,855✔
348
  if (pRsp == NULL) {
225,908!
349
    mError("show:0x%" PRIx64 ", failed to retrieve data since %s", pShow->id, tstrerror(code));
×
350
    code = terrno;
×
351
    goto _exit;
×
352
  }
353

354
  pRsp->handle = htobe64(pShow->id);
225,908✔
355

356
  if (rowsRead > 0) {
225,932✔
357
    char    *pStart = pRsp->data;
177,881✔
358
    SSchema *ps = pShow->pMeta->pSchemas;
177,881✔
359

360
    *(int32_t *)pStart = htonl(pShow->pMeta->numOfColumns);
177,881✔
361
    pStart += sizeof(int32_t);  // number of columns
177,881✔
362

363
    for (int32_t i = 0; i < pShow->pMeta->numOfColumns; ++i) {
3,042,871✔
364
      SSysTableSchema *pSchema = (SSysTableSchema *)pStart;
2,864,990✔
365
      pSchema->bytes = htonl(ps[i].bytes);
2,864,990✔
366
      pSchema->colId = htons(ps[i].colId);
2,864,990✔
367
      pSchema->type = ps[i].type;
2,864,990✔
368

369
      pStart += sizeof(SSysTableSchema);
2,864,990✔
370
    }
371

372
    int32_t len = blockEncode(pBlock, pStart, dataEncodeBufSize, pShow->pMeta->numOfColumns);
177,881✔
373
    if (len < 0) {
177,957!
374
      mError("show:0x%" PRIx64 ", failed to retrieve data since %s", pShow->id, tstrerror(code));
×
375
      code = terrno;
×
376
      return code;
×
377
    }
378
  }
379

380
  pRsp->numOfRows = htonl(rowsRead);
226,008✔
381
  pRsp->precision = TSDB_TIME_PRECISION_MILLI;  // millisecond time precision
226,008✔
382
  pReq->info.rsp = pRsp;
226,008✔
383
  pReq->info.rspLen = size;
226,008✔
384

385
  if (rowsRead == 0 || mndCheckRetrieveFinished(pShow)) {
226,008✔
386
    pRsp->completed = 1;
218,131✔
387
    mDebug("show:0x%" PRIx64 ", retrieve completed", pShow->id);
218,131✔
388
    mndReleaseShowObj(pShow, true);
218,131✔
389
  } else {
390
    mDebug("show:0x%" PRIx64 ", retrieve not completed yet", pShow->id);
7,907✔
391
    mndReleaseShowObj(pShow, false);
7,907✔
392
  }
393

394
  blockDataDestroy(pBlock);
225,936✔
395
  return TSDB_CODE_SUCCESS;
226,007✔
396
_exit:
×
397
  mndReleaseShowObj(pShow, false);
×
398
  blockDataDestroy(pBlock);
×
399
  if (pRsp) {
×
400
    rpcFreeCont(pRsp);
×
401
  }
402
  return code;
×
403
}
404

405
static bool mndCheckRetrieveFinished(SShowObj *pShow) {
403,756✔
406
  if (pShow->pIter == NULL && pShow->numOfRows != 0) {
403,756✔
407
    return true;
170,015✔
408
  }
409
  return false;
233,741✔
410
}
411

412
void mndAddShowRetrieveHandle(SMnode *pMnode, EShowType showType, ShowRetrieveFp fp) {
65,930✔
413
  SShowMgmt *pMgmt = &pMnode->showMgmt;
65,930✔
414
  pMgmt->retrieveFps[showType] = fp;
65,930✔
415
}
65,930✔
416

417
void mndAddShowFreeIterHandle(SMnode *pMnode, EShowType showType, ShowFreeIterFp fp) {
60,725✔
418
  SShowMgmt *pMgmt = &pMnode->showMgmt;
60,725✔
419
  pMgmt->freeIterFps[showType] = fp;
60,725✔
420
}
60,725✔
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