Skip to content

TDengine
TDengine

taosdata / TDengine
1 年多 前同步成功

通知 1185
Star 22016
Fork 4786
TDengine
TDengine
提交 d6bc3261 编写于 作者: H Haojun Liao
浏览文件
操作

Merge branch 'feature/query' of https://github.com/taosdata/TDengine into feature/query

上级 dfe2c4fc e9428242
隐藏空白更改
内联 并排
Showing with 599 addition and 78 deletion
src/client/src/tscSql.c
浏览文件 @ d6bc3261
......@@ -724,6 +724,13 @@ int taos_print_row(char *str, TAOS_ROW row, TAOS_FIELD *fields, int num_fields)
return len;
}
static void asyncCallback(void *param, TAOS_RES *tres, int code) {
assert(param != NULL);
SSqlObj *pSql = ((SSqlObj *)param);
pSql->res.code = code;
sem_post(&pSql->rspSem);
}
int taos_validate_sql(TAOS *taos, const char *sql) {
STscObj *pObj = (STscObj *)taos;
if (pObj == NULL || pObj->signature != pObj) {
......@@ -732,7 +739,8 @@ int taos_validate_sql(TAOS *taos, const char *sql) {
}
SSqlObj* pSql = calloc(1, sizeof(SSqlObj));
pSql->pTscObj = taos;
pSql->signature = pSql;
SSqlRes *pRes = &pSql->res;
SSqlCmd *pCmd = &pSql->cmd;
......@@ -766,10 +774,17 @@ int taos_validate_sql(TAOS *taos, const char *sql) {
pCmd->pTableList = NULL;
}
pRes->code = (uint8_t)tsParseSql(pSql, false);
int code = pRes->code;
tscDebug("%p Valid SQL result:%d, %s pObj:%p", pSql, pRes->code, taos_errstr(taos), pObj);
pSql->fp = asyncCallback;
pSql->fetchFp = asyncCallback;
pSql->param = pSql;
int code = tsParseSql(pSql, true);
if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
sem_wait(&pSql->rspSem);
code = pSql->res.code;
}
if (code != TSDB_CODE_SUCCESS) {
tscDebug("%p Valid SQL result:%d, %s pObj:%p", pSql, code, taos_errstr(taos), pObj);
}
taos_free_result(pSql);
return code;
......@@ -865,6 +880,8 @@ int taos_load_table_info(TAOS *taos, const char *tableNameList) {
}
SSqlObj* pSql = calloc(1, sizeof(SSqlObj));
pSql->pTscObj = taos;
pSql->signature = pSql;
SSqlRes *pRes = &pSql->res;
pRes->numOfTotal = 0; // the number of getting table meta from server
......
src/client/src/tscStream.c
浏览文件 @ d6bc3261
......@@ -122,7 +122,7 @@ static void tscProcessStreamTimer(void *handle, void *tmrId) {
pQueryInfo->window.ekey = pStream->etime;
}
} else {
pQueryInfo->window.skey = pStream->stime - pStream->interval;
pQueryInfo->window.skey = pStream->stime;
int64_t etime = taosGetTimestamp(pStream->precision);
// delay to wait all data in last time window
if (pStream->precision == TSDB_TIME_PRECISION_MICRO) {
......@@ -232,6 +232,9 @@ static void tscProcessStreamRetrieveResult(void *param, TAOS_RES *res, int numOf
(*pStream->fp)(pStream->param, res, row);
}
if (!pStream->isProject) {
pStream->stime += pStream->slidingTime;
}
// actually only one row is returned. this following is not necessary
taos_fetch_rows_a(res, tscProcessStreamRetrieveResult, pStream);
} else { // numOfRows == 0, all data has been retrieved
......@@ -432,6 +435,7 @@ static int64_t tscGetStreamStartTimestamp(SSqlObj *pSql, SSqlStream *pStream, in
} else { // timewindow based aggregation stream
if (stime == 0) { // no data in meter till now
stime = ((int64_t)taosGetTimestamp(pStream->precision) / pStream->interval) * pStream->interval;
stime -= pStream->interval;
tscWarn("%p stream:%p, last timestamp:0, reset to:%" PRId64, pSql, pStream, stime);
} else {
int64_t newStime = (stime / pStream->interval) * pStream->interval;
......
src/client/src/tscSub.c
浏览文件 @ d6bc3261
......@@ -34,6 +34,7 @@ typedef struct SSubscriptionProgress {
typedef struct SSub {
void * signature;
char topic[32];
sem_t sem;
int64_t lastSyncTime;
int64_t lastConsumeTime;
TAOS * taos;
......@@ -83,84 +84,108 @@ void tscUpdateSubscriptionProgress(void* sub, int64_t uid, TSKEY ts) {
static void asyncCallback(void *param, TAOS_RES *tres, int code) {
assert(param != NULL);
SSqlObj *pSql = ((SSqlObj *)param);
pSql->res.code = code;
sem_post(&pSql->rspSem);
SSub *pSub = ((SSub *)param);
pSub->pSql->res.code = code;
sem_post(&pSub->sem);
}
static SSub* tscCreateSubscription(STscObj* pObj, const char* topic, const char* sql) {
SSub* pSub = NULL;
TRY( 8 ) {
SSqlObj* pSql = calloc_throw(1, sizeof(SSqlObj));
CLEANUP_PUSH_FREE(true, pSql);
SSqlCmd *pCmd = &pSql->cmd;
SSqlRes *pRes = &pSql->res;
if (tsem_init(&pSql->rspSem, 0, 0) == -1) {
THROW(TAOS_SYSTEM_ERROR(errno));
}
CLEANUP_PUSH_INT_PTR(true, tsem_destroy, &pSql->rspSem);
int code = TSDB_CODE_SUCCESS, line = __LINE__;
SSqlObj* pSql = NULL;
pSql->signature = pSql;
pSql->param = pSql;
pSql->pTscObj = pObj;
pSql->maxRetry = TSDB_MAX_REPLICA;
pSql->fp = asyncCallback;
int code = tscAllocPayload(pCmd, TSDB_DEFAULT_PAYLOAD_SIZE);
if (code != TSDB_CODE_SUCCESS) {
THROW(code);
}
CLEANUP_PUSH_FREE(true, pCmd->payload);
SSub* pSub = calloc(1, sizeof(SSub));
if (pSub == NULL) {
line = __LINE__;
code = TSDB_CODE_TSC_OUT_OF_MEMORY;
goto fail;
}
pSub->signature = pSub;
if (tsem_init(&pSub->sem, 0, 0) == -1) {
line = __LINE__;
code = TAOS_SYSTEM_ERROR(errno);
goto fail;
}
tstrncpy(pSub->topic, topic, sizeof(pSub->topic));
pSub->progress = taosArrayInit(32, sizeof(SSubscriptionProgress));
if (pSub->progress == NULL) {
line = __LINE__;
code = TSDB_CODE_TSC_OUT_OF_MEMORY;
goto fail;
}
pRes->qhandle = 0;
pRes->numOfRows = 1;
pSql = calloc(1, sizeof(SSqlObj));
if (pSql == NULL) {
line = __LINE__;
code = TSDB_CODE_TSC_OUT_OF_MEMORY;
goto fail;
}
pSql->signature = pSql;
pSql->pTscObj = pObj;
pSql->pSubscription = pSub;
pSub->pSql = pSql;
pSql->sqlstr = strdup_throw(sql);
CLEANUP_PUSH_FREE(true, pSql->sqlstr);
strtolower(pSql->sqlstr, pSql->sqlstr);
SSqlCmd* pCmd = &pSql->cmd;
SSqlRes* pRes = &pSql->res;
if (tsem_init(&pSql->rspSem, 0, 0) == -1) {
line = __LINE__;
code = TAOS_SYSTEM_ERROR(errno);
goto fail;
}
code = tsParseSql(pSql, false);
if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
// wait for the callback function to post the semaphore
sem_wait(&pSql->rspSem);
code = pSql->res.code;
}
if (code != TSDB_CODE_SUCCESS) {
tscError("failed to parse sql statement: %s, error: %s", pSub->topic, tstrerror(code));
THROW( code );
}
pSql->param = pSub;
pSql->maxRetry = TSDB_MAX_REPLICA;
pSql->fp = asyncCallback;
pSql->fetchFp = asyncCallback;
pSql->sqlstr = strdup(sql);
if (pSql->sqlstr == NULL) {
line = __LINE__;
code = TSDB_CODE_TSC_OUT_OF_MEMORY;
goto fail;
}
strtolower(pSql->sqlstr, pSql->sqlstr);
pRes->qhandle = 0;
pRes->numOfRows = 1;
code = tscAllocPayload(pCmd, TSDB_DEFAULT_PAYLOAD_SIZE);
if (code != TSDB_CODE_SUCCESS) {
line = __LINE__;
goto fail;
}
if (pSql->cmd.command != TSDB_SQL_SELECT) {
tscError("only 'select' statement is allowed in subscription: %s", pSub->topic);
THROW( -1 ); // TODO
}
code = tsParseSql(pSql, false);
if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
sem_wait(&pSub->sem);
code = pSql->res.code;
}
if (code != TSDB_CODE_SUCCESS) {
line = __LINE__;
goto fail;
}
pSub = calloc_throw(1, sizeof(SSub));
CLEANUP_PUSH_FREE(true, pSub);
pSql->pSubscription = pSub;
pSub->pSql = pSql;
pSub->signature = pSub;
strncpy(pSub->topic, topic, sizeof(pSub->topic));
pSub->topic[sizeof(pSub->topic) - 1] = 0;
pSub->progress = taosArrayInit(32, sizeof(SSubscriptionProgress));
if (pSub->progress == NULL) {
THROW(TSDB_CODE_TSC_OUT_OF_MEMORY);
}
if (pSql->cmd.command != TSDB_SQL_SELECT) {
line = __LINE__;
code = TSDB_CODE_TSC_INVALID_SQL;
goto fail;
}
CLEANUP_EXECUTE();
return pSub;
} CATCH( code ) {
tscError("failed to create subscription object: %s", tstrerror(code));
CLEANUP_EXECUTE();
fail:
tscError("tscCreateSubscription failed at line %d, reason: %s", line, tstrerror(code));
if (pSql != NULL) {
tscFreeSqlObj(pSql);
pSql = NULL;
}
if (pSub != NULL) {
taosArrayDestroy(pSub->progress);
tsem_destroy(&pSub->sem);
free(pSub);
pSub = NULL;
}
} END_TRY
return pSub;
terrno = code;
return NULL;
}
......@@ -405,9 +430,10 @@ TAOS_RES *taos_consume(TAOS_SUB *tsub) {
tscGetTableMetaInfoFromCmd(&pSql->cmd, 0, 0)->vgroupIndex = 0;
pSql->fp = asyncCallback;
pSql->param = pSql;
pSql->fetchFp = asyncCallback;
pSql->param = pSub;
tscDoQuery(pSql);
sem_wait(&pSql->rspSem);
sem_wait(&pSub->sem);
if (pRes->code != TSDB_CODE_SUCCESS) {
continue;
......@@ -437,7 +463,9 @@ void taos_unsubscribe(TAOS_SUB *tsub, int keepProgress) {
}
if (keepProgress) {
tscSaveSubscriptionProgress(pSub);
if (pSub->progress != NULL) {
tscSaveSubscriptionProgress(pSub);
}
} else {
char path[256];
sprintf(path, "%s/subscribe/%s", tsDataDir, pSub->topic);
......@@ -448,6 +476,7 @@ void taos_unsubscribe(TAOS_SUB *tsub, int keepProgress) {
tscFreeSqlObj(pSub->pSql);
taosArrayDestroy(pSub->progress);
tsem_destroy(&pSub->sem);
memset(pSub, 0, sizeof(*pSub));
free(pSub);
}
src/inc/taos.h
浏览文件 @ d6bc3261
......@@ -67,8 +67,6 @@ DLL_EXPORT void taos_init();
DLL_EXPORT void taos_cleanup();
DLL_EXPORT int taos_options(TSDB_OPTION option, const void *arg, ...);
DLL_EXPORT TAOS *taos_connect(const char *ip, const char *user, const char *pass, const char *db, uint16_t port);
DLL_EXPORT TAOS *taos_connect_c(const char *ip, uint8_t ipLen, const char *user, uint8_t userLen,
const char *pass, uint8_t passLen, const char *db, uint8_t dbLen, uint16_t port);
DLL_EXPORT void taos_close(TAOS *taos);
typedef struct TAOS_BIND {
......@@ -90,7 +88,6 @@ TAOS_RES * taos_stmt_use_result(TAOS_STMT *stmt);
int taos_stmt_close(TAOS_STMT *stmt);
DLL_EXPORT TAOS_RES *taos_query(TAOS *taos, const char *sql);
DLL_EXPORT TAOS_RES *taos_query_c(TAOS *taos, const char *sql, uint32_t sqlLen);
DLL_EXPORT TAOS_ROW taos_fetch_row(TAOS_RES *res);
DLL_EXPORT int taos_result_precision(TAOS_RES *res); // get the time precision of result
DLL_EXPORT void taos_free_result(TAOS_RES *res);
......
src/query/src/qExecutor.c
浏览文件 @ d6bc3261
......@@ -4964,7 +4964,7 @@ static void tableMultiOutputProcess(SQInfo *pQInfo, STableQueryInfo* pTableInfo)
pQuery->current->lastKey, pQuery->window.ekey);
} else if (Q_STATUS_EQUAL(pQuery->status, QUERY_COMPLETED)) {
STableIdInfo tidInfo;
STableId* id = TSDB_TABLEID(pQuery->current);
STableId* id = TSDB_TABLEID(pQuery->current->pTable);
tidInfo.uid = id->uid;
tidInfo.tid = id->tid;
......
tests/examples/c/apitest.c 0 → 100644
浏览文件 @ d6bc3261
// sample code to verify all TDengine API
// to compile: gcc -o apitest apitest.c -ltaos
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <taos.h>
#include <unistd.h>
static void prepare_data(TAOS* taos) {
taos_query(taos, "drop database if exists test;");
usleep(100000);
taos_query(taos, "create database test;");
usleep(100000);
taos_select_db(taos, "test");
taos_query(taos, "create table meters(ts timestamp, a int) tags(area int);");
taos_query(taos, "create table t0 using meters tags(0);");
taos_query(taos, "create table t1 using meters tags(1);");
taos_query(taos, "create table t2 using meters tags(2);");
taos_query(taos, "create table t3 using meters tags(3);");
taos_query(taos, "create table t4 using meters tags(4);");
taos_query(taos, "create table t5 using meters tags(5);");
taos_query(taos, "create table t6 using meters tags(6);");
taos_query(taos, "create table t7 using meters tags(7);");
taos_query(taos, "create table t8 using meters tags(8);");
taos_query(taos, "create table t9 using meters tags(9);");
TAOS_RES* res = taos_query(taos, "insert into t0 values('2020-01-01 00:00:00.000', 0)"
" ('2020-01-01 00:01:00.000', 0)"
" ('2020-01-01 00:02:00.000', 0)"
" t1 values('2020-01-01 00:00:00.000', 0)"
" ('2020-01-01 00:01:00.000', 0)"
" ('2020-01-01 00:02:00.000', 0)"
" ('2020-01-01 00:03:00.000', 0)"
" t2 values('2020-01-01 00:00:00.000', 0)"
" ('2020-01-01 00:01:00.000', 0)"
" ('2020-01-01 00:01:01.000', 0)"
" ('2020-01-01 00:01:02.000', 0)"
" t3 values('2020-01-01 00:01:02.000', 0)"
" t4 values('2020-01-01 00:01:02.000', 0)"
" t5 values('2020-01-01 00:01:02.000', 0)"
" t6 values('2020-01-01 00:01:02.000', 0)"
" t7 values('2020-01-01 00:01:02.000', 0)"
" t8 values('2020-01-01 00:01:02.000', 0)"
" t9 values('2020-01-01 00:01:02.000', 0)");
int affected = taos_affected_rows(res);
if (affected != 18) {
printf("\033[31m%d rows affected by last insert statement, but it should be 18\033[0m\n", affected);
}
// super tables subscription
usleep(1000000);
}
static int print_result(TAOS_RES* res, int blockFetch) {
TAOS_ROW row = NULL;
int num_fields = taos_num_fields(res);
TAOS_FIELD* fields = taos_fetch_fields(res);
int nRows = 0;
if (blockFetch) {
int rows = 0;
while ((rows = taos_fetch_block(res, &row))) {
for (int i = 0; i < rows; i++) {
char temp[256];
taos_print_row(temp, row + i, fields, num_fields);
puts(temp);
}
nRows += rows;
}
} else {
while ((row = taos_fetch_row(res))) {
char temp[256];
taos_print_row(temp, row, fields, num_fields);
puts(temp);
nRows++;
}
}
printf("%d rows consumed.\n", nRows);
return nRows;
}
static void check_row_count(int line, TAOS_RES* res, int expected) {
int actual = print_result(res, expected % 2);
if (actual != expected) {
printf("\033[31mline %d: row count mismatch, expected: %d, actual: %d\033[0m\n", line, expected, actual);
} else {
printf("line %d: %d rows consumed as expected\n", line, actual);
}
}
static void verify_query(TAOS* taos) {
prepare_data(taos);
int code = taos_load_table_info(taos, "t0,t1,t2,t3,t4,t5,t6,t7,t8,t9");
if (code != 0) {
printf("\033[31mfailed to load table info: 0x%08x\033[0m\n", code);
}
code = taos_validate_sql(taos, "select * from nonexisttable");
if (code == 0) {
printf("\033[31mimpossible, the table does not exists\033[0m\n");
}
code = taos_validate_sql(taos, "select * from meters");
if (code != 0) {
printf("\033[31mimpossible, the table does exists: 0x%08x\033[0m\n", code);
}
TAOS_RES* res = taos_query(taos, "select * from meters");
check_row_count(__LINE__, res, 18);
printf("result precision is: %d\n", taos_result_precision(res));
int c = taos_field_count(res);
printf("field count is: %d\n", c);
int* lengths = taos_fetch_lengths(res);
for (int i = 0; i < c; i++) {
printf("length of column %d is %d\n", i, lengths[i]);
}
taos_free_result(res);
res = taos_query(taos, "select * from t0");
check_row_count(__LINE__, res, 3);
taos_free_result(res);
res = taos_query(taos, "select * from nonexisttable");
code = taos_errno(res);
printf("code=%d, error msg=%s\n", code, taos_errstr(res));
taos_free_result(res);
res = taos_query(taos, "select * from meters");
taos_stop_query(res);
}
void subscribe_callback(TAOS_SUB* tsub, TAOS_RES *res, void* param, int code) {
int rows = print_result(res, *(int*)param);
printf("%d rows consumed in subscribe_callback\n", rows);
}
static void verify_subscribe(TAOS* taos) {
prepare_data(taos);
TAOS_SUB* tsub = taos_subscribe(taos, 0, "test", "select * from meters;", NULL, NULL, 0);
TAOS_RES* res = taos_consume(tsub);
check_row_count(__LINE__, res, 18);
res = taos_consume(tsub);
check_row_count(__LINE__, res, 0);
taos_query(taos, "insert into t0 values('2020-01-01 00:02:00.001', 0);");
taos_query(taos, "insert into t8 values('2020-01-01 00:01:03.000', 0);");
res = taos_consume(tsub);
check_row_count(__LINE__, res, 2);
taos_query(taos, "insert into t2 values('2020-01-01 00:01:02.001', 0);");
taos_query(taos, "insert into t1 values('2020-01-01 00:03:00.001', 0);");
res = taos_consume(tsub);
check_row_count(__LINE__, res, 2);
taos_query(taos, "insert into t1 values('2020-01-01 00:03:00.002', 0);");
res = taos_consume(tsub);
check_row_count(__LINE__, res, 1);
// keep progress information and restart subscription
taos_unsubscribe(tsub, 1);
taos_query(taos, "insert into t0 values('2020-01-01 00:04:00.000', 0);");
tsub = taos_subscribe(taos, 1, "test", "select * from meters;", NULL, NULL, 0);
res = taos_consume(tsub);
check_row_count(__LINE__, res, 24);
// keep progress information and continue previous subscription
taos_unsubscribe(tsub, 1);
tsub = taos_subscribe(taos, 0, "test", "select * from meters;", NULL, NULL, 0);
res = taos_consume(tsub);
check_row_count(__LINE__, res, 0);
// don't keep progress information and continue previous subscription
taos_unsubscribe(tsub, 0);
tsub = taos_subscribe(taos, 0, "test", "select * from meters;", NULL, NULL, 0);
res = taos_consume(tsub);
check_row_count(__LINE__, res, 24);
// single meter subscription
taos_unsubscribe(tsub, 0);
tsub = taos_subscribe(taos, 0, "test", "select * from t0;", NULL, NULL, 0);
res = taos_consume(tsub);
check_row_count(__LINE__, res, 5);
res = taos_consume(tsub);
check_row_count(__LINE__, res, 0);
taos_query(taos, "insert into t0 values('2020-01-01 00:04:00.001', 0);");
res = taos_consume(tsub);
check_row_count(__LINE__, res, 1);
taos_unsubscribe(tsub, 0);
int blockFetch = 0;
tsub = taos_subscribe(taos, 1, "test", "select * from meters;", subscribe_callback, &blockFetch, 1000);
usleep(2000000);
taos_query(taos, "insert into t0 values('2020-01-01 00:05:00.001', 0);");
usleep(2000000);
taos_unsubscribe(tsub, 0);
}
void verify_prepare(TAOS* taos) {
TAOS_RES* result = taos_query(taos, "drop database if exists test;");
usleep(100000);
taos_query(taos, "create database test;");
int code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create database, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
return;
}
taos_free_result(result);
usleep(100000);
taos_select_db(taos, "test");
// create table
const char* sql = "create table m1 (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, bin binary(40), blob nchar(10))";
result = taos_query(taos, sql);
code = taos_errno(result);
if (code != 0) {
printf("\033[31mfailed to create table, reason:%s\033[0m\n", taos_errstr(result));
taos_free_result(result);
return;
}
taos_free_result(result);
// insert 10 records
struct {
int64_t ts;
int8_t b;
int8_t v1;
int16_t v2;
int32_t v4;
int64_t v8;
float f4;
double f8;
char bin[40];
char blob[80];
} v = {0};
TAOS_STMT* stmt = taos_stmt_init(taos);
TAOS_BIND params[10];
params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP;
params[0].buffer_length = sizeof(v.ts);
params[0].buffer = &v.ts;
params[0].length = &params[0].buffer_length;
params[0].is_null = NULL;
params[1].buffer_type = TSDB_DATA_TYPE_BOOL;
params[1].buffer_length = sizeof(v.b);
params[1].buffer = &v.b;
params[1].length = &params[1].buffer_length;
params[1].is_null = NULL;
params[2].buffer_type = TSDB_DATA_TYPE_TINYINT;
params[2].buffer_length = sizeof(v.v1);
params[2].buffer = &v.v1;
params[2].length = &params[2].buffer_length;
params[2].is_null = NULL;
params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT;
params[3].buffer_length = sizeof(v.v2);
params[3].buffer = &v.v2;
params[3].length = &params[3].buffer_length;
params[3].is_null = NULL;
params[4].buffer_type = TSDB_DATA_TYPE_INT;
params[4].buffer_length = sizeof(v.v4);
params[4].buffer = &v.v4;
params[4].length = &params[4].buffer_length;
params[4].is_null = NULL;
params[5].buffer_type = TSDB_DATA_TYPE_BIGINT;
params[5].buffer_length = sizeof(v.v8);
params[5].buffer = &v.v8;
params[5].length = &params[5].buffer_length;
params[5].is_null = NULL;
params[6].buffer_type = TSDB_DATA_TYPE_FLOAT;
params[6].buffer_length = sizeof(v.f4);
params[6].buffer = &v.f4;
params[6].length = &params[6].buffer_length;
params[6].is_null = NULL;
params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE;
params[7].buffer_length = sizeof(v.f8);
params[7].buffer = &v.f8;
params[7].length = &params[7].buffer_length;
params[7].is_null = NULL;
params[8].buffer_type = TSDB_DATA_TYPE_BINARY;
params[8].buffer_length = sizeof(v.bin);
params[8].buffer = v.bin;
params[8].length = &params[8].buffer_length;
params[8].is_null = NULL;
strcpy(v.blob, "一二三四五六七八九十");
params[9].buffer_type = TSDB_DATA_TYPE_NCHAR;
params[9].buffer_length = strlen(v.blob);
params[9].buffer = v.blob;
params[9].length = &params[9].buffer_length;
params[9].is_null = NULL;
int is_null = 1;
sql = "insert into m1 values(?,?,?,?,?,?,?,?,?,?)";
code = taos_stmt_prepare(stmt, sql, 0);
if (code != 0){
printf("\033[31mfailed to execute taos_stmt_prepare. code:0x%x\033[0m\n", code);
}
v.ts = 1591060628000;
for (int i = 0; i < 10; ++i) {
v.ts += 1;
for (int j = 1; j < 10; ++j) {
params[j].is_null = ((i == j) ? &is_null : 0);
}
v.b = (int8_t)i % 2;
v.v1 = (int8_t)i;
v.v2 = (int16_t)(i * 2);
v.v4 = (int32_t)(i * 4);
v.v8 = (int64_t)(i * 8);
v.f4 = (float)(i * 40);
v.f8 = (double)(i * 80);
for (int j = 0; j < sizeof(v.bin) - 1; ++j) {
v.bin[j] = (char)(i + '0');
}
taos_stmt_bind_param(stmt, params);
taos_stmt_add_batch(stmt);
}
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute insert statement.\033[0m\n");
return;
}
taos_stmt_close(stmt);
// query the records
stmt = taos_stmt_init(taos);
taos_stmt_prepare(stmt, "SELECT * FROM m1 WHERE v1 > ? AND v2 < ?", 0);
v.v1 = 5;
v.v2 = 15;
taos_stmt_bind_param(stmt, params + 2);
if (taos_stmt_execute(stmt) != 0) {
printf("\033[31mfailed to execute select statement.\033[0m\n");
return;
}
result = taos_stmt_use_result(stmt);
TAOS_ROW row;
int rows = 0;
int num_fields = taos_num_fields(result);
TAOS_FIELD *fields = taos_fetch_fields(result);
char temp[256];
// fetch the records row by row
while ((row = taos_fetch_row(result))) {
rows++;
taos_print_row(temp, row, fields, num_fields);
printf("%s\n", temp);
}
taos_free_result(result);
taos_stmt_close(stmt);
}
void retrieve_callback(void *param, TAOS_RES *tres, int numOfRows)
{
if (numOfRows > 0) {
printf("%d rows async retrieved\n", numOfRows);
taos_fetch_rows_a(tres, retrieve_callback, param);
} else {
if (numOfRows < 0) {
printf("\033[31masync retrieve failed, code: %d\033[0m\n", numOfRows);
} else {
printf("async retrieve completed\n");
}
taos_free_result(tres);
}
}
void select_callback(void *param, TAOS_RES *tres, int code)
{
if (code == 0 && tres) {
taos_fetch_rows_a(tres, retrieve_callback, param);
} else {
printf("\033[31masync select failed, code: %d\033[0m\n", code);
}
}
void verify_async(TAOS* taos) {
prepare_data(taos);
taos_query_a(taos, "select * from meters", select_callback, NULL);
usleep(1000000);
}
void stream_callback(void *param, TAOS_RES *res, TAOS_ROW row) {
int num_fields = taos_num_fields(res);
TAOS_FIELD* fields = taos_fetch_fields(res);
printf("got one row from stream_callback\n");
char temp[256];
taos_print_row(temp, row, fields, num_fields);
puts(temp);
}
void verify_stream(TAOS* taos) {
prepare_data(taos);
TAOS_STREAM* strm = taos_open_stream(
taos,
"select count(*) from meters interval(1m)",
stream_callback,
0,
NULL,
NULL);
printf("waiting for stream data\n");
usleep(100000);
taos_query(taos, "insert into t0 values(now, 0)(now+5s,1)(now+10s, 2);");
usleep(200000000);
taos_close_stream(strm);
}
int main(int argc, char *argv[]) {
const char* host = "127.0.0.1";
const char* user = "root";
const char* passwd = "taosdata";
taos_options(TSDB_OPTION_TIMEZONE, "GMT-8");
taos_init();
TAOS* taos = taos_connect(host, user, passwd, "", 0);
if (taos == NULL) {
printf("\033[31mfailed to connect to db, reason:%s\033[0m\n", taos_errstr(taos));
exit(1);
}
char* info = taos_get_server_info(taos);
printf("server info: %s\n", info);
info = taos_get_client_info(taos);
printf("client info: %s\n", info);
printf("************ verify query *************\n");
verify_query(taos);
printf("********* verify async query **********\n");
verify_async(taos);
printf("*********** verify subscribe ************\n");
verify_subscribe(taos);
printf("************ verify prepare *************\n");
verify_prepare(taos);
printf("************ verify stream *************\n");
verify_stream(taos);
printf("done\n");
taos_close(taos);
taos_cleanup();
}
\ No newline at end of file
tests/examples/c/makefile
浏览文件 @ d6bc3261
......@@ -4,7 +4,6 @@
ROOT=./
TARGET=exe
LFLAGS = '-Wl,-rpath,/usr/local/taos/driver/' -ltaos -lpthread -lm -lrt
#LFLAGS = '-Wl,-rpath,/home/zbm/project/td/debug/build/lib/' -L/home/zbm/project/td/debug/build/lib -ltaos -lpthread -lm -lrt
CFLAGS = -O3 -g -Wall -Wno-deprecated -fPIC -Wno-unused-result -Wconversion -Wno-char-subscripts -D_REENTRANT -Wno-format -D_REENTRANT -DLINUX -msse4.2 -Wno-unused-function -D_M_X64 \
-I/usr/local/taos/include -std=gnu99
......@@ -16,6 +15,7 @@ exe:
gcc $(CFLAGS) ./prepare.c -o $(ROOT)/prepare $(LFLAGS)
gcc $(CFLAGS) ./stream.c -o $(ROOT)/stream $(LFLAGS)
gcc $(CFLAGS) ./subscribe.c -o $(ROOT)subscribe $(LFLAGS)
gcc $(CFLAGS) ./apitest.c -o $(ROOT)apitest $(LFLAGS)
clean:
rm $(ROOT)/asyncdemo
......
Markdown is supported
0% 或 .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑！
想要评论请 注册 或