fix: alter column length too big issue

source/libs/parser/src/parTranslater.c

@@ -5012,14 +5012,24 @@ static int32_t checkAlterSuperTableBySchema(STranslateContext* pCxt, SAlterTable
       return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_MODIFY_COL);
     }
 
-    if (TSDB_ALTER_TABLE_UPDATE_COLUMN_BYTES == pStmt->alterType &&
-        pTableMeta->tableInfo.rowSize + calcTypeBytes(pStmt->dataType) - pSchema->bytes > TSDB_MAX_BYTES_PER_ROW) {
-      return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_ROW_LENGTH, TSDB_MAX_BYTES_PER_ROW);
+    if (TSDB_ALTER_TABLE_UPDATE_COLUMN_BYTES == pStmt->alterType) {
+      if (calcTypeBytes(pStmt->dataType) > TSDB_MAX_FIELD_LEN) {
+        return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_VAR_COLUMN_LEN);
+      }
+
+      if (pTableMeta->tableInfo.rowSize + calcTypeBytes(pStmt->dataType) - pSchema->bytes > TSDB_MAX_BYTES_PER_ROW) {
+        return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_ROW_LENGTH, TSDB_MAX_BYTES_PER_ROW);
+      }
     }
 
-    if (TSDB_ALTER_TABLE_UPDATE_TAG_BYTES == pStmt->alterType &&
-        tagsLen + calcTypeBytes(pStmt->dataType) - pSchema->bytes > TSDB_MAX_TAGS_LEN) {
-      return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_TAGS_LENGTH, TSDB_MAX_TAGS_LEN);
+    if (TSDB_ALTER_TABLE_UPDATE_TAG_BYTES == pStmt->alterType) {
+      if (calcTypeBytes(pStmt->dataType) > TSDB_MAX_FIELD_LEN) {
+        return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_VAR_COLUMN_LEN);
+      }
+
+      if (tagsLen + calcTypeBytes(pStmt->dataType) - pSchema->bytes > TSDB_MAX_TAGS_LEN) {
+        return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_TAGS_LENGTH, TSDB_MAX_TAGS_LEN);
+      }
     }
   }
 

source/util/src/terror.c

@@ -514,7 +514,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_PAR_INVALID_ROW_LENGTH,         "Row length exceeds
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_INVALID_COLUMNS_NUM,        "Illegal number of columns")
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_TOO_MANY_COLUMNS,           "Too many columns")
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_INVALID_FIRST_COLUMN,       "First column must be timestamp")
-TAOS_DEFINE_ERROR(TSDB_CODE_PAR_INVALID_VAR_COLUMN_LEN,     "Invalid binary/nchar column length")
+TAOS_DEFINE_ERROR(TSDB_CODE_PAR_INVALID_VAR_COLUMN_LEN,     "Invalid binary/nchar column/tag length")
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_INVALID_TAGS_NUM,           "Invalid number of tag columns")
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_PERMISSION_DENIED,          "Permission denied")
 TAOS_DEFINE_ERROR(TSDB_CODE_PAR_INVALID_STREAM_QUERY,       "Invalid stream query")