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Merge pull request #3446 from taosdata/feature/TD-1370 

[TD-1370]<enhance>: support function count(1)
This commit is contained in:
Shengliang Guan 2020-09-09 12:48:30 +08:00 committed by GitHub
parent eae082a565 ef4828d8e0
commit e19dc2b7cb
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 37 additions and 8 deletions
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28
src/client/src/tscSQLParser.c
View File

@ -1597,13 +1597,14 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
SColumnIndex index = COLUMN_INDEX_INITIALIZER;
if (pItem->pNode->pParam != NULL) {
SStrToken* pToken = &pItem->pNode->pParam->a[0].pNode->colInfo;
if (pToken->z == NULL || pToken->n == 0) {
return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
}
tSQLExprItem* pParamElem = &pItem->pNode->pParam->a[0];
if (pParamElem->pNode->nSQLOptr == TK_ALL) {
SStrToken* pToken = &pParamElem->pNode->colInfo;
short sqlOptr = pParamElem->pNode->nSQLOptr;
if ((pToken->z == NULL || pToken->n == 0)
&& (TK_INTEGER != sqlOptr)) /*select count(1) from table*/ {
return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
}
if (sqlOptr == TK_ALL) {
// select table.*
// check if the table name is valid or not
SStrToken tmpToken = pParamElem->pNode->colInfo;
@ -1615,6 +1616,21 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
index = (SColumnIndex){0, PRIMARYKEY_TIMESTAMP_COL_INDEX};
int32_t size = tDataTypeDesc[TSDB_DATA_TYPE_BIGINT].nSize;
pExpr = tscSqlExprAppend(pQueryInfo, functionID, &index, TSDB_DATA_TYPE_BIGINT, size, size, false);
} else if (sqlOptr == TK_INTEGER) { // select count(1) from table1
char buf[8] = {0};
int64_t val = -1;
tVariant* pVariant = &pParamElem->pNode->val;
if (pVariant->nType == TSDB_DATA_TYPE_BIGINT) {
tVariantDump(pVariant, buf, TSDB_DATA_TYPE_BIGINT, true);
val = GET_INT64_VAL(buf);
}
if (val == 1) {
index = (SColumnIndex){0, PRIMARYKEY_TIMESTAMP_COL_INDEX};
int32_t size = tDataTypeDesc[TSDB_DATA_TYPE_BIGINT].nSize;
pExpr = tscSqlExprAppend(pQueryInfo, functionID, &index, TSDB_DATA_TYPE_BIGINT, size, size, false);
} else {
return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
}
} else {
// count the number of meters created according to the super table
if (getColumnIndexByName(pCmd, pToken, pQueryInfo, &index) != TSDB_CODE_SUCCESS) {

17
tests/script/general/compute/count.sim
View File

@ -52,6 +52,12 @@ if $data00 != $rowNum then
return -1
endi
sql select count(1) from $tb
print ===> select count(1) from $tb => $data00
if $data00 != $rowNum then
return -1
endi
sql select count(tbcol) from $tb
print ===> $data00
if $data00 != $rowNum then
@ -102,13 +108,20 @@ if $data00 != $totalNum then
return -1
endi
print =============== step8
sql select count(1) from $mt
print ===> $data00
if $data00 != $totalNum then
return -1
endi
sql select count(tbcol) from $mt
print ===> $data00
if $data00 != $totalNum then
return -1
endi
print =============== step8
print =============== step10
sql select count(tbcol) as c from $mt where ts < now + 4m
print ===> $data00
if $data00 != 50 then
@ -171,4 +184,4 @@ if $rows != 0 then
return -1
endi
system sh/exec.sh -n dnode1 -s stop -x SIGINT
system sh/exec.sh -n dnode1 -s stop -x SIGINT