From d03b77ef02e6fbcb5851574f6d4345f542f4b99b Mon Sep 17 00:00:00 2001
From: Shuaiqiang Chang <sqchang@taosdata.com>
Date: Thu, 21 May 2020 15:15:46 +0800
Subject: [PATCH] fix:describe cannot get tag value

---
 src/kit/taosdump/taosdump.c | 51 +++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/src/kit/taosdump/taosdump.c b/src/kit/taosdump/taosdump.c
index 4087a26404..7ccd300123 100644
--- a/src/kit/taosdump/taosdump.c
+++ b/src/kit/taosdump/taosdump.c
@@ -720,6 +720,57 @@ void taosDumpCreateMTableClause(STableDef *tableDes, char *metric, int numOfCols
   count_temp = counter;
 
   for (; counter < numOfCols; counter++) {
+    TAOS_ROW row = NULL;
+
+    sprintf(command, "select %s from %s limit 1", tableDes->cols[counter].field, tableDes->name);
+    if (taos_query(taos, command) != 0) {
+      fprintf(stderr, "failed to run command %s\n", command);
+      return;
+    }
+
+    result = taos_use_result(taos);
+    if (result == NULL) {
+      fprintf(stderr, "failed to use result\n");
+      return;
+    }
+
+    TAOS_FIELD *fields = taos_fetch_fields(result);
+
+    row = taos_fetch_row(result);
+    switch (fields[0].type) {
+      case TSDB_DATA_TYPE_BOOL:
+        sprintf(tableDes->cols[counter].note, "%d", ((((int)(*((char *)row[0]))) == 1) ? 1 : 0));
+        break;
+      case TSDB_DATA_TYPE_TINYINT:
+        sprintf(tableDes->cols[counter].note, "%d", (int)(*((char *)row[0])));
+        break;
+      case TSDB_DATA_TYPE_SMALLINT:
+        sprintf(tableDes->cols[counter].note, "%d", (int)(*((short *)row[0])));
+        break;
+      case TSDB_DATA_TYPE_INT:
+        sprintf(tableDes->cols[counter].note, "%d", *((int *)row[0]));
+        break;
+      case TSDB_DATA_TYPE_BIGINT:
+        sprintf(tableDes->cols[counter].note, "%" PRId64 "", *((int64_t *)row[0]));
+        break;
+      case TSDB_DATA_TYPE_FLOAT:
+        sprintf(tableDes->cols[counter].note, "%f", GET_FLOAT_VAL(row[0]));
+        break;
+      case TSDB_DATA_TYPE_DOUBLE:
+        sprintf(tableDes->cols[counter].note, "%f", GET_DOUBLE_VAL(row[0]));
+        break;
+      case TSDB_DATA_TYPE_TIMESTAMP:
+        sprintf(tableDes->cols[counter].note, "%" PRId64 "", *(int64_t *)row[0]);
+        break;
+      case TSDB_DATA_TYPE_BINARY:
+      case TSDB_DATA_TYPE_NCHAR:
+      default:
+        strncpy(tableDes->cols[counter].note, (char *)row[0], fields[0].bytes);
+        break;
+    }
+
+    taos_free_result(result);
+
     if (counter != count_temp) {
       if (strcasecmp(tableDes->cols[counter].type, "binary") == 0 ||
           strcasecmp(tableDes->cols[counter].type, "nchar") == 0) {
-- 
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