// sample code to verify all TDengine API // to compile: gcc -o apitest apitest.c -ltaos #include #include #include #include #include static void prepare_data(TAOS* taos) { TAOS_RES *result; result = taos_query(taos, "drop database if exists test;"); taos_free_result(result); usleep(100000); result = taos_query(taos, "create database test precision 'us';"); taos_free_result(result); usleep(100000); taos_select_db(taos, "test"); result = taos_query(taos, "create table meters(ts timestamp, a int) tags(area int);"); taos_free_result(result); result = taos_query(taos, "create table t0 using meters tags(0);"); taos_free_result(result); result = taos_query(taos, "create table t1 using meters tags(1);"); taos_free_result(result); result = taos_query(taos, "create table t2 using meters tags(2);"); taos_free_result(result); result = taos_query(taos, "create table t3 using meters tags(3);"); taos_free_result(result); result = taos_query(taos, "create table t4 using meters tags(4);"); taos_free_result(result); result = taos_query(taos, "create table t5 using meters tags(5);"); taos_free_result(result); result = taos_query(taos, "create table t6 using meters tags(6);"); taos_free_result(result); result = taos_query(taos, "create table t7 using meters tags(7);"); taos_free_result(result); result = taos_query(taos, "create table t8 using meters tags(8);"); taos_free_result(result); result = taos_query(taos, "create table t9 using meters tags(9);"); taos_free_result(result); result = 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(result); if (affected != 18) { printf("\033[31m%d rows affected by last insert statement, but it should be 18\033[0m\n", affected); } taos_free_result(result); // 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] = {0}; 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); taos_free_result(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_RES *result; result = taos_query(taos, "insert into t0 values('2020-01-01 00:02:00.001', 0);"); taos_free_result(result); result = taos_query(taos, "insert into t8 values('2020-01-01 00:01:03.000', 0);"); taos_free_result(result); res = taos_consume(tsub); check_row_count(__LINE__, res, 2); result = taos_query(taos, "insert into t2 values('2020-01-01 00:01:02.001', 0);"); taos_free_result(result); result = taos_query(taos, "insert into t1 values('2020-01-01 00:03:00.001', 0);"); taos_free_result(result); res = taos_consume(tsub); check_row_count(__LINE__, res, 2); result = taos_query(taos, "insert into t1 values('2020-01-01 00:03:00.002', 0);"); taos_free_result(result); res = taos_consume(tsub); check_row_count(__LINE__, res, 1); // keep progress information and restart subscription taos_unsubscribe(tsub, 1); result = taos_query(taos, "insert into t0 values('2020-01-01 00:04:00.000', 0);"); taos_free_result(result); 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); result = taos_query(taos, "insert into t0 values('2020-01-01 00:04:00.001', 0);"); taos_free_result(result); 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); result = taos_query(taos, "insert into t0 values('2020-01-01 00:05:00.001', 0);"); taos_free_result(result); usleep(2000000); taos_unsubscribe(tsub, 0); } void verify_prepare(TAOS* taos) { TAOS_RES* result = taos_query(taos, "drop database if exists test;"); taos_free_result(result); usleep(100000); result = 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 = ¶ms[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 = ¶ms[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 = ¶ms[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 = ¶ms[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 = ¶ms[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 = ¶ms[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 = ¶ms[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 = ¶ms[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 = ¶ms[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 = ¶ms[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. error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); return; } 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.error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); 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.error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); 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); // fetch the records row by row while ((row = taos_fetch_row(result))) { char temp[256] = {0}; rows++; taos_print_row(temp, row, fields, num_fields); printf("%s\n", temp); } taos_free_result(result); taos_stmt_close(stmt); } void verify_prepare2(TAOS* taos) { TAOS_RES* result = taos_query(taos, "drop database if exists test;"); taos_free_result(result); usleep(100000); result = 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[10]; int8_t b[10]; int8_t v1[10]; int16_t v2[10]; int32_t v4[10]; int64_t v8[10]; float f4[10]; double f8[10]; char bin[10][40]; char blob[10][80]; } v; int32_t *t8_len = malloc(sizeof(int32_t) * 10); int32_t *t16_len = malloc(sizeof(int32_t) * 10); int32_t *t32_len = malloc(sizeof(int32_t) * 10); int32_t *t64_len = malloc(sizeof(int32_t) * 10); int32_t *float_len = malloc(sizeof(int32_t) * 10); int32_t *double_len = malloc(sizeof(int32_t) * 10); int32_t *bin_len = malloc(sizeof(int32_t) * 10); int32_t *blob_len = malloc(sizeof(int32_t) * 10); TAOS_STMT* stmt = taos_stmt_init(taos); TAOS_MULTI_BIND params[10]; char is_null[10] = {0}; params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP; params[0].buffer_length = sizeof(v.ts[0]); params[0].buffer = v.ts; params[0].length = t64_len; params[0].is_null = is_null; params[0].num = 10; params[1].buffer_type = TSDB_DATA_TYPE_BOOL; params[1].buffer_length = sizeof(v.b[0]); params[1].buffer = v.b; params[1].length = t8_len; params[1].is_null = is_null; params[1].num = 10; params[2].buffer_type = TSDB_DATA_TYPE_TINYINT; params[2].buffer_length = sizeof(v.v1[0]); params[2].buffer = v.v1; params[2].length = t8_len; params[2].is_null = is_null; params[2].num = 10; params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT; params[3].buffer_length = sizeof(v.v2[0]); params[3].buffer = v.v2; params[3].length = t16_len; params[3].is_null = is_null; params[3].num = 10; params[4].buffer_type = TSDB_DATA_TYPE_INT; params[4].buffer_length = sizeof(v.v4[0]); params[4].buffer = v.v4; params[4].length = t32_len; params[4].is_null = is_null; params[4].num = 10; params[5].buffer_type = TSDB_DATA_TYPE_BIGINT; params[5].buffer_length = sizeof(v.v8[0]); params[5].buffer = v.v8; params[5].length = t64_len; params[5].is_null = is_null; params[5].num = 10; params[6].buffer_type = TSDB_DATA_TYPE_FLOAT; params[6].buffer_length = sizeof(v.f4[0]); params[6].buffer = v.f4; params[6].length = float_len; params[6].is_null = is_null; params[6].num = 10; params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE; params[7].buffer_length = sizeof(v.f8[0]); params[7].buffer = v.f8; params[7].length = double_len; params[7].is_null = is_null; params[7].num = 10; params[8].buffer_type = TSDB_DATA_TYPE_BINARY; params[8].buffer_length = sizeof(v.bin[0]); params[8].buffer = v.bin; params[8].length = bin_len; params[8].is_null = is_null; params[8].num = 10; params[9].buffer_type = TSDB_DATA_TYPE_NCHAR; params[9].buffer_length = sizeof(v.blob[0]); params[9].buffer = v.blob; params[9].length = blob_len; params[9].is_null = is_null; params[9].num = 10; sql = "insert into ? (ts, b, v1, v2, v4, v8, f4, f8, bin, blob) values(?,?,?,?,?,?,?,?,?,?)"; code = taos_stmt_prepare(stmt, sql, 0); if (code != 0) { printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); return; } code = taos_stmt_set_tbname(stmt, "m1"); if (code != 0){ printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); return; } int64_t ts = 1591060628000; for (int i = 0; i < 10; ++i) { v.ts[i] = ts++; is_null[i] = 0; v.b[i] = (int8_t)i % 2; v.v1[i] = (int8_t)i; v.v2[i] = (int16_t)(i * 2); v.v4[i] = (int32_t)(i * 4); v.v8[i] = (int64_t)(i * 8); v.f4[i] = (float)(i * 40); v.f8[i] = (double)(i * 80); for (int j = 0; j < sizeof(v.bin[0]) - 1; ++j) { v.bin[i][j] = (char)(i + '0'); } strcpy(v.blob[i], "一二三四五六七八九十"); t8_len[i] = sizeof(int8_t); t16_len[i] = sizeof(int16_t); t32_len[i] = sizeof(int32_t); t64_len[i] = sizeof(int64_t); float_len[i] = sizeof(float); double_len[i] = sizeof(double); bin_len[i] = sizeof(v.bin[0]); blob_len[i] = (int32_t)strlen(v.blob[i]); } taos_stmt_bind_param_batch(stmt, params); taos_stmt_add_batch(stmt); if (taos_stmt_execute(stmt) != 0) { printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); 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); TAOS_BIND qparams[2]; int8_t v1 = 5; int16_t v2 = 15; qparams[0].buffer_type = TSDB_DATA_TYPE_TINYINT; qparams[0].buffer_length = sizeof(v1); qparams[0].buffer = &v1; qparams[0].length = &qparams[0].buffer_length; qparams[0].is_null = NULL; qparams[1].buffer_type = TSDB_DATA_TYPE_SMALLINT; qparams[1].buffer_length = sizeof(v2); qparams[1].buffer = &v2; qparams[1].length = &qparams[1].buffer_length; qparams[1].is_null = NULL; taos_stmt_bind_param(stmt, qparams); if (taos_stmt_execute(stmt) != 0) { printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); 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); // fetch the records row by row while ((row = taos_fetch_row(result))) { char temp[256] = {0}; rows++; taos_print_row(temp, row, fields, num_fields); printf("%s\n", temp); } taos_free_result(result); taos_stmt_close(stmt); free(t8_len); free(t16_len); free(t32_len); free(t64_len); free(float_len); free(double_len); free(bin_len); free(blob_len); } void verify_prepare3(TAOS* taos) { TAOS_RES* result = taos_query(taos, "drop database if exists test;"); taos_free_result(result); usleep(100000); result = 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 stable st1 (ts timestamp, b bool, v1 tinyint, v2 smallint, v4 int, v8 bigint, f4 float, f8 double, bin binary(40), blob nchar(10)) tags (id1 int, id2 binary(40))"; 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); TAOS_BIND tags[2]; int32_t id1 = 1; char id2[40] = "abcdefghijklmnopqrstuvwxyz0123456789"; uintptr_t id2_len = strlen(id2); tags[0].buffer_type = TSDB_DATA_TYPE_INT; tags[0].buffer_length = sizeof(int); tags[0].buffer = &id1; tags[0].length = NULL; tags[0].is_null = NULL; tags[1].buffer_type = TSDB_DATA_TYPE_BINARY; tags[1].buffer_length = sizeof(id2); tags[1].buffer = id2; tags[1].length = &id2_len; tags[1].is_null = NULL; // insert 10 records struct { int64_t ts[10]; int8_t b[10]; int8_t v1[10]; int16_t v2[10]; int32_t v4[10]; int64_t v8[10]; float f4[10]; double f8[10]; char bin[10][40]; char blob[10][80]; } v; int32_t *t8_len = malloc(sizeof(int32_t) * 10); int32_t *t16_len = malloc(sizeof(int32_t) * 10); int32_t *t32_len = malloc(sizeof(int32_t) * 10); int32_t *t64_len = malloc(sizeof(int32_t) * 10); int32_t *float_len = malloc(sizeof(int32_t) * 10); int32_t *double_len = malloc(sizeof(int32_t) * 10); int32_t *bin_len = malloc(sizeof(int32_t) * 10); int32_t *blob_len = malloc(sizeof(int32_t) * 10); TAOS_STMT* stmt = taos_stmt_init(taos); TAOS_MULTI_BIND params[10]; char is_null[10] = {0}; params[0].buffer_type = TSDB_DATA_TYPE_TIMESTAMP; params[0].buffer_length = sizeof(v.ts[0]); params[0].buffer = v.ts; params[0].length = t64_len; params[0].is_null = is_null; params[0].num = 10; params[1].buffer_type = TSDB_DATA_TYPE_BOOL; params[1].buffer_length = sizeof(v.b[0]); params[1].buffer = v.b; params[1].length = t8_len; params[1].is_null = is_null; params[1].num = 10; params[2].buffer_type = TSDB_DATA_TYPE_TINYINT; params[2].buffer_length = sizeof(v.v1[0]); params[2].buffer = v.v1; params[2].length = t8_len; params[2].is_null = is_null; params[2].num = 10; params[3].buffer_type = TSDB_DATA_TYPE_SMALLINT; params[3].buffer_length = sizeof(v.v2[0]); params[3].buffer = v.v2; params[3].length = t16_len; params[3].is_null = is_null; params[3].num = 10; params[4].buffer_type = TSDB_DATA_TYPE_INT; params[4].buffer_length = sizeof(v.v4[0]); params[4].buffer = v.v4; params[4].length = t32_len; params[4].is_null = is_null; params[4].num = 10; params[5].buffer_type = TSDB_DATA_TYPE_BIGINT; params[5].buffer_length = sizeof(v.v8[0]); params[5].buffer = v.v8; params[5].length = t64_len; params[5].is_null = is_null; params[5].num = 10; params[6].buffer_type = TSDB_DATA_TYPE_FLOAT; params[6].buffer_length = sizeof(v.f4[0]); params[6].buffer = v.f4; params[6].length = float_len; params[6].is_null = is_null; params[6].num = 10; params[7].buffer_type = TSDB_DATA_TYPE_DOUBLE; params[7].buffer_length = sizeof(v.f8[0]); params[7].buffer = v.f8; params[7].length = double_len; params[7].is_null = is_null; params[7].num = 10; params[8].buffer_type = TSDB_DATA_TYPE_BINARY; params[8].buffer_length = sizeof(v.bin[0]); params[8].buffer = v.bin; params[8].length = bin_len; params[8].is_null = is_null; params[8].num = 10; params[9].buffer_type = TSDB_DATA_TYPE_NCHAR; params[9].buffer_length = sizeof(v.blob[0]); params[9].buffer = v.blob; params[9].length = blob_len; params[9].is_null = is_null; params[9].num = 10; sql = "insert into ? using st1 tags(?,?) values(?,?,?,?,?,?,?,?,?,?)"; code = taos_stmt_prepare(stmt, sql, 0); if (code != 0){ printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); return; } code = taos_stmt_set_tbname_tags(stmt, "m1", tags); if (code != 0){ printf("\033[31mfailed to execute taos_stmt_prepare. error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); return; } int64_t ts = 1591060628000; for (int i = 0; i < 10; ++i) { v.ts[i] = ts++; is_null[i] = 0; v.b[i] = (int8_t)i % 2; v.v1[i] = (int8_t)i; v.v2[i] = (int16_t)(i * 2); v.v4[i] = (int32_t)(i * 4); v.v8[i] = (int64_t)(i * 8); v.f4[i] = (float)(i * 40); v.f8[i] = (double)(i * 80); for (int j = 0; j < sizeof(v.bin[0]) - 1; ++j) { v.bin[i][j] = (char)(i + '0'); } strcpy(v.blob[i], "一二三四五六七八九十"); t8_len[i] = sizeof(int8_t); t16_len[i] = sizeof(int16_t); t32_len[i] = sizeof(int32_t); t64_len[i] = sizeof(int64_t); float_len[i] = sizeof(float); double_len[i] = sizeof(double); bin_len[i] = sizeof(v.bin[0]); blob_len[i] = (int32_t)strlen(v.blob[i]); } taos_stmt_bind_param_batch(stmt, params); taos_stmt_add_batch(stmt); if (taos_stmt_execute(stmt) != 0) { printf("\033[31mfailed to execute insert statement.error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); 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); TAOS_BIND qparams[2]; int8_t v1 = 5; int16_t v2 = 15; qparams[0].buffer_type = TSDB_DATA_TYPE_TINYINT; qparams[0].buffer_length = sizeof(v1); qparams[0].buffer = &v1; qparams[0].length = &qparams[0].buffer_length; qparams[0].is_null = NULL; qparams[1].buffer_type = TSDB_DATA_TYPE_SMALLINT; qparams[1].buffer_length = sizeof(v2); qparams[1].buffer = &v2; qparams[1].length = &qparams[1].buffer_length; qparams[1].is_null = NULL; taos_stmt_bind_param(stmt, qparams); if (taos_stmt_execute(stmt) != 0) { printf("\033[31mfailed to execute select statement.error:%s\033[0m\n", taos_stmt_errstr(stmt)); taos_stmt_close(stmt); 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); // fetch the records row by row while ((row = taos_fetch_row(result))) { char temp[256] = {0}; rows++; taos_print_row(temp, row, fields, num_fields); printf("%s\n", temp); } taos_free_result(result); taos_stmt_close(stmt); free(t8_len); free(t16_len); free(t32_len); free(t64_len); free(float_len); free(double_len); free(bin_len); free(blob_len); } 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) { if (res == NULL || row == NULL) { return; } 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] = {0}; 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_RES* result = taos_query(taos, "insert into t0 values(now, 0)(now+5s,1)(now+10s, 2);"); taos_free_result(result); usleep(200000000); taos_close_stream(strm); } int32_t verify_schema_less(TAOS* taos) { TAOS_RES *result; result = taos_query(taos, "drop database if exists test;"); taos_free_result(result); usleep(100000); result = taos_query(taos, "create database test precision 'us' update 1;"); taos_free_result(result); usleep(100000); taos_select_db(taos, "test"); result = taos_query(taos, "create stable ste(ts timestamp, f int) tags(t1 bigint)"); taos_free_result(result); usleep(100000); int code = 0; char* lines2[] = { "zqlbgs,id=\"zqlbgs_39302_21680\",t0=f,t1=127i8,t2=32767i16,t3=2147483647i32,t4=9223372036854775807i64,t5=11.12345f32,t6=22.123456789f64,t7=\"binaryTagValue\",t8=L\"ncharTagValue\" c0=f,c1=127i8,c2=32767i16,c3=2147483647i32,c4=9223372036854775807i64,c5=11.12345f32,c6=22.123456789f64,c7=\"binaryColValue\",c8=L\"ncharColValue\",c9=7u64 1626006833639000000ns", "zqlbgs,t9=f,id=\"zqlbgs_39302_21680\",t0=f,t1=127i8,t11=127i8,t2=32767i16,t3=2147483647i32,t4=9223372036854775807i64,t5=11.12345f32,t6=22.123456789f64,t7=\"binaryTagValue\",t8=L\"ncharTagValue\",t10=L\"ncharTagValue\" c10=f,c0=f,c1=127i8,c12=127i8,c2=32767i16,c3=2147483647i32,c4=9223372036854775807i64,c5=11.12345f32,c6=22.123456789f64,c7=\"binaryColValue\",c8=L\"ncharColValue\",c9=7u64,c11=L\"ncharColValue\" 1626006833639000000ns" }; code = taos_insert_lines(taos, &lines2[0], 1); code = taos_insert_lines(taos, &lines2[1], 1); char* lines3[] = { "sth,t1=4i64,t2=5f64,t4=5f64,ID=\"childtable\" c1=3i64,c3=L\"passitagin_stf\",c2=false,c5=5f64,c6=7u64 1626006933641ms", "sth,t1=4i64,t2=5f64,t4=5f64 c1=3i64,c3=L\"passitagin_stf\",c2=false,c5=5f64,c6=7u64 1626006933654ms" }; code = taos_insert_lines(taos, lines3, 2); char* lines4[] = { "st123456,t1=3i64,t2=4f64,t3=\"t3\" c1=3i64,c3=L\"passit\",c2=false,c4=4f64 1626006833639000000ns", "dgtyqodr,t2=5f64,t3=L\"ste\" c1=tRue,c2=4i64,c3=\"iam\" 1626056811823316532ns" }; code = taos_insert_lines(taos, lines4, 2); return code; } 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* 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 shemaless *************\n"); verify_schema_less(taos); 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 prepare2 *************\n"); verify_prepare2(taos); printf("************ verify prepare3 *************\n"); verify_prepare3(taos); printf("************ verify stream *************\n"); verify_stream(taos); printf("done\n"); taos_close(taos); taos_cleanup(); }