[td-225]refactor.

src/client/src/tscSQLParser.c

@@ -780,8 +780,8 @@ int32_t parseIntervalClause(SSqlObj* pSql, SQueryInfo* pQueryInfo, SQuerySqlNode
   STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
   STableComInfo tinfo = tscGetTableInfo(pTableMetaInfo->pTableMeta);
   
-  if (pQuerySqlNode->interval == NULL) {
-    if (pQuerySqlNode->sliding != NULL) {
+  if (!TPARSER_HAS_TOKEN(pQuerySqlNode->interval.interval)) {
+    if (TPARSER_HAS_TOKEN(pQuerySqlNode->sliding)) {
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
     }
 
@@ -794,7 +794,7 @@ int32_t parseIntervalClause(SSqlObj* pSql, SQueryInfo* pQueryInfo, SQuerySqlNode
   }
 
   // interval is not null
-  SStrToken *t = &pQuerySqlNode->interval->interval;
+  SStrToken *t = &pQuerySqlNode->interval.interval;
   if (parseNatualDuration(t->z, t->n, &pQueryInfo->interval.interval, &pQueryInfo->interval.intervalUnit) != TSDB_CODE_SUCCESS) {
     return TSDB_CODE_TSC_INVALID_SQL;
   }
@@ -811,11 +811,11 @@ int32_t parseIntervalClause(SSqlObj* pSql, SQueryInfo* pQueryInfo, SQuerySqlNode
     }
   }
 
-  if (parseIntervalOffset(pCmd, pQueryInfo, &pQuerySqlNode->interval->offset) != TSDB_CODE_SUCCESS) {
+  if (parseIntervalOffset(pCmd, pQueryInfo, &pQuerySqlNode->interval.offset) != TSDB_CODE_SUCCESS) {
     return TSDB_CODE_TSC_INVALID_SQL;
   }
 
-  if (parseSlidingClause(pCmd, pQueryInfo, pQuerySqlNode->sliding) != TSDB_CODE_SUCCESS) {
+  if (parseSlidingClause(pCmd, pQueryInfo, &pQuerySqlNode->sliding) != TSDB_CODE_SUCCESS) {
     return TSDB_CODE_TSC_INVALID_SQL;
   }
 
@@ -830,12 +830,12 @@ int32_t parseSessionClause(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SQuerySqlNode
   const char* msg4 = "invalid time window";
 
   // no session window
-  if (pQuerySqlNode->sessionVal == NULL) {
+  if (!TPARSER_HAS_TOKEN(pQuerySqlNode->sessionVal.gap)) {
     return TSDB_CODE_SUCCESS;
   }
 
-  SStrToken* col = &pQuerySqlNode->sessionVal->col;
-  SStrToken* gap = &pQuerySqlNode->sessionVal->gap;
+  SStrToken* col = &pQuerySqlNode->sessionVal.col;
+  SStrToken* gap = &pQuerySqlNode->sessionVal.gap;
 
   char timeUnit = 0;
   if (parseNatualDuration(gap->z, gap->n, &pQueryInfo->sessionWindow.gap, &timeUnit) != TSDB_CODE_SUCCESS) {
@@ -5439,9 +5439,9 @@ int32_t parseLimitClause(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t clauseIn
   const char* msg2 = "slimit/soffset can not apply to projection query";
 
   // handle the limit offset value, validate the limit
-  pQueryInfo->limit = *pQuerySqlNode->limit;
+  pQueryInfo->limit = pQuerySqlNode->limit;
   pQueryInfo->clauseLimit = pQueryInfo->limit.limit;
-  pQueryInfo->slimit = *pQuerySqlNode->slimit;
+  pQueryInfo->slimit = pQuerySqlNode->slimit;
   
   tscDebug("%p limit:%" PRId64 ", offset:%" PRId64 " slimit:%" PRId64 ", soffset:%" PRId64, pSql, pQueryInfo->limit.limit,
       pQueryInfo->limit.offset, pQueryInfo->slimit.limit, pQueryInfo->slimit.offset);
@@ -6840,7 +6840,8 @@ int32_t doValidateSqlNode(SSqlObj* pSql, SQuerySqlNode* pQuerySqlNode, int32_t i
   }
 
   int32_t joinQuery = (pQuerySqlNode->from != NULL && taosArrayGetSize(pQuerySqlNode->from) > 2);
-  int32_t timeWindowQuery = !(pQuerySqlNode->interval == NULL || pQuerySqlNode->sessionVal == NULL);
+  int32_t timeWindowQuery =
+      (TPARSER_HAS_TOKEN(pQuerySqlNode->interval.interval) || TPARSER_HAS_TOKEN(pQuerySqlNode->sessionVal.gap));
 
   if (parseSelectClause(pCmd, index, pQuerySqlNode->pSelectList, isSTable, joinQuery, timeWindowQuery) != TSDB_CODE_SUCCESS) {
     return TSDB_CODE_TSC_INVALID_SQL;

src/query/inc/qSqlparser.h

@@ -50,6 +50,8 @@ extern char tTokenTypeSwitcher[13];
     }                                          \
   } while (0)
 
+#define TPARSER_HAS_TOKEN(_t) ((_t).n > 0)
+
 typedef struct SLimitVal {
   int64_t            limit;
   int64_t            offset;
@@ -81,12 +83,12 @@ typedef struct SQuerySqlNode {
   struct tSqlExpr   *pWhere;       // where clause [optional]
   SArray            *pGroupby;     // groupby clause, only for tags[optional], SArray<tVariantListItem>
   SArray            *pSortOrder;   // orderby [optional], SArray<tVariantListItem>
-  SIntervalVal      *interval;     // (interval, interval_offset) [optional]
-  SSessionWindowVal *sessionVal;   // session window [optional]
-  SStrToken         *sliding;      // sliding window [optional]
-  SLimitVal         *limit;        // limit offset [optional]
-  SLimitVal         *slimit;       // group limit offset [optional]
   SArray            *fillType;     // fill type[optional], SArray<tVariantListItem>
+  SIntervalVal       interval;     // (interval, interval_offset) [optional]
+  SSessionWindowVal  sessionVal;   // session window [optional]
+  SStrToken          sliding;      // sliding window [optional]
+  SLimitVal          limit;        // limit offset [optional]
+  SLimitVal          slimit;       // group limit offset [optional]
   SStrToken          sqlstr;       // sql string in select clause
 } SQuerySqlNode;
 
@@ -222,7 +224,7 @@ typedef struct tSqlExpr {
 // used in select clause. select <SArray> from xxx
 typedef struct tSqlExprItem {
   tSqlExpr          *pNode;      // The list of expressions
-  char *    aliasName;  // alias name, null-terminated string
+  char              *aliasName;  // alias name, null-terminated string
   bool               distinct;
 } tSqlExprItem;
 
@@ -241,9 +243,8 @@ SArray   *tSqlExprListAppend(SArray *pList, tSqlExpr *pNode, SStrToken *pDistinc
 void      tSqlExprListDestroy(SArray *pList);
 
 SQuerySqlNode *tSetQuerySqlNode(SStrToken *pSelectToken, SArray *pSelectList, SArray *pFrom, tSqlExpr *pWhere,
-                                SArray *pGroupby, SArray *pSortOrder, SIntervalVal *pInterval,
-                                SSessionWindowVal *pSession, SStrToken *pSliding, SArray *pFill, SLimitVal *pLimit,
-                                SLimitVal *pGLimit);
+                                SArray *pGroupby, SArray *pSortOrder, SIntervalVal *pInterval, SSessionWindowVal *ps,
+                                SStrToken *pSliding, SArray *pFill, SLimitVal *pLimit, SLimitVal *pgLimit);
 
 SCreateTableSql *tSetCreateTableInfo(SArray *pCols, SArray *pTags, SQuerySqlNode *pSelect, int32_t type);
 
@@ -251,7 +252,7 @@ SAlterTableInfo *tSetAlterTableInfo(SStrToken *pTableName, SArray *pCols, SArray
 SCreatedTableInfo createNewChildTableInfo(SStrToken *pTableName, SArray *pTagNames, SArray *pTagVals, SStrToken *pToken, SStrToken* igExists);
 
 void destroyAllSelectClause(SSubclauseInfo *pSql);
-void doDestroyQuerySql(SQuerySqlNode *pSql);
+void destroyQuerySqlNode(SQuerySqlNode *pSql);
 void freeCreateTableInfo(void* p);
 
 SSqlInfo       *setSqlInfo(SSqlInfo *pInfo, void *pSqlExprInfo, SStrToken *pTableName, int32_t type);

src/query/src/qSqlParser.c

@@ -547,38 +547,26 @@ void tSetColumnType(TAOS_FIELD *pField, SStrToken *type) {
  */
 SQuerySqlNode *tSetQuerySqlNode(SStrToken *pSelectToken, SArray *pSelectList, SArray *pFrom, tSqlExpr *pWhere,
                              SArray *pGroupby, SArray *pSortOrder, SIntervalVal *pInterval, SSessionWindowVal *pSession,
-                             SStrToken *pSliding, SArray *pFill, SLimitVal *pLimit, SLimitVal *pGLimit) {
-  assert(pSelectList != NULL);
+                             SStrToken *pSliding, SArray *pFill, SLimitVal *pLimit, SLimitVal *psLimit) {
+  assert(pSelectList != NULL && pLimit != NULL && psLimit != NULL && pInterval != NULL && pSliding != NULL &&
+         pSession != NULL);
 
   SQuerySqlNode *pQuery = calloc(1, sizeof(SQuerySqlNode));
+
+  // all later sql string are belonged to the stream sql
   pQuery->sqlstr   = *pSelectToken;
-  pQuery->sqlstr.n = (uint32_t)strlen(pQuery->sqlstr.z);  // all later sql string are belonged to the stream sql
+  pQuery->sqlstr.n = (uint32_t)strlen(pQuery->sqlstr.z);
 
   pQuery->pSelectList = pSelectList;
   pQuery->from        = pFrom;
   pQuery->pGroupby    = pGroupby;
   pQuery->pSortOrder  = pSortOrder;
   pQuery->pWhere      = pWhere;
-
-  if (pLimit != NULL) {
-    pQuery->limit = pLimit;
-  }
-
-  if (pGLimit != NULL) {
-    pQuery->slimit = pGLimit;
-  }
-
-  if (pInterval != NULL) {
-    pQuery->interval = pInterval;
-  }
-
-  if (pSliding != NULL) {
-    pQuery->sliding = pSliding;
-  }
-
-  if (pSession != NULL) {
-    pQuery->sessionVal = pSession;
-  }
+  pQuery->limit       = *pLimit;
+  pQuery->slimit      = *psLimit;
+  pQuery->interval    = *pInterval;
+  pQuery->sliding     = *pSliding;
+  pQuery->sessionVal  = *pSession;
 
   pQuery->fillType = pFill;
   return pQuery;
@@ -597,7 +585,7 @@ void freeCreateTableInfo(void* p) {
   tfree(pInfo->tagdata.data);
 }
 
-void doDestroyQuerySql(SQuerySqlNode *pQuerySql) {
+void destroyQuerySqlNode(SQuerySqlNode *pQuerySql) {
   if (pQuerySql == NULL) {
     return;
   }
@@ -631,7 +619,7 @@ void destroyAllSelectClause(SSubclauseInfo *pClause) {
 
   for(int32_t i = 0; i < pClause->numOfClause; ++i) {
     SQuerySqlNode *pQuerySql = pClause->pClause[i];
-    doDestroyQuerySql(pQuerySql);
+    destroyQuerySqlNode(pQuerySql);
   }
   
   tfree(pClause->pClause);
@@ -705,7 +693,7 @@ SAlterTableInfo *tSetAlterTableInfo(SStrToken *pTableName, SArray *pCols, SArray
 }
 
 void* destroyCreateTableSql(SCreateTableSql* pCreate) {
-  doDestroyQuerySql(pCreate->pSelect);
+  destroyQuerySqlNode(pCreate->pSelect);
 
   taosArrayDestroy(pCreate->colInfo.pColumns);
   taosArrayDestroy(pCreate->colInfo.pTagColumns);

src/query/src/sql.c

@@ -1425,7 +1425,7 @@ destroyCreateTableSql((yypminor->yy230));
       break;
     case 235: /* select */
 {
-doDestroyQuerySql((yypminor->yy342));
+destroyQuerySqlNode((yypminor->yy342));
 }
       break;
     case 238: /* selcollist */