From 3e0683390b0c8de2a399ed56ab81bca809d58173 Mon Sep 17 00:00:00 2001 From: MangTsang Date: Thu, 8 Jun 2023 17:25:04 +0800 Subject: [PATCH] udpate resultSet Signed-off-by: MangTsang --- .../database/data-persistence-by-rdb-store.md | 15 ++- .../apis/js-apis-data-relationalStore.md | 104 +++++++++++++++--- 2 files changed, 100 insertions(+), 19 deletions(-) diff --git a/zh-cn/application-dev/database/data-persistence-by-rdb-store.md b/zh-cn/application-dev/database/data-persistence-by-rdb-store.md index b959445abb..3125efa18d 100644 --- a/zh-cn/application-dev/database/data-persistence-by-rdb-store.md +++ b/zh-cn/application-dev/database/data-persistence-by-rdb-store.md @@ -225,13 +225,22 @@ ```js let predicates = new relationalStore.RdbPredicates('EMPLOYEE'); predicates.equalTo('NAME', 'Rose'); - store.query(predicates, ['ID', 'NAME', 'AGE', 'SALARY', 'CODES'], (err, resultSet) => { + store.query(predicates, ['ID', 'NAME', 'AGE', 'SALARY'], (err, resultSet) => { if (err) { console.error(`Failed to query data. Code:${err.code}, message:${err.message}`); return; } - console.info(`ResultSet column names: ${resultSet.columnNames}`); - console.info(`ResultSet column count: ${resultSet.columnCount}`); + console.info(`ResultSet column names: ${resultSet.columnNames}, column count: ${resultSet.columnCount}`); + // resultSet是一个数据集合的游标，默认指向第-1个记录，有效的数据从0开始。 + while (resultSet.goToNextRow()) { + const id = resultSet.getLong(resultSet.getColumnIndex("ID")); + const name = resultSet.getString(resultSet.getColumnIndex("NAME")); + const age = resultSet.getLong(resultSet.getColumnIndex("AGE")); + const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY")); + console.info(`id=${id}, name=${name}, age=${age}, salary=${salary}`); + } + // 释放数据集的内存 + resultSet.close(); }) ``` diff --git a/zh-cn/application-dev/reference/apis/js-apis-data-relationalStore.md b/zh-cn/application-dev/reference/apis/js-apis-data-relationalStore.md index 14445cd824..e3bf1159ca 100644 --- a/zh-cn/application-dev/reference/apis/js-apis-data-relationalStore.md +++ b/zh-cn/application-dev/reference/apis/js-apis-data-relationalStore.md @@ -2076,8 +2076,17 @@ store.query(predicates, ["ID", "NAME", "AGE", "SALARY", "CODES"], function (err, console.error(`Query failed, code is ${err.code},message is ${err.message}`); return; } - console.info(`ResultSet column names: ${resultSet.columnNames}`); - console.info(`ResultSet column count: ${resultSet.columnCount}`); + console.info(`ResultSet column names: ${resultSet.columnNames}, column count: ${resultSet.columnCount}`); + // resultSet是一个数据集合的游标，默认指向第-1个记录，有效的数据从0开始。 + while(resultSet.goToNextRow()) { + const id = resultSet.getLong(resultSet.getColumnIndex("ID")); + const name = resultSet.getString(resultSet.getColumnIndex("NAME")); + const age = resultSet.getLong(resultSet.getColumnIndex("AGE")); + const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY")); + console.info(`id=${id}, name=${name}, age=${age}, salary=${salary}`); + } + // 释放数据集的内存 + resultSet.close(); }) ``` @@ -2117,8 +2126,17 @@ let predicates = new relationalStore.RdbPredicates("EMPLOYEE"); predicates.equalTo("NAME", "Rose"); let promise = store.query(predicates, ["ID", "NAME", "AGE", "SALARY", "CODES"]); promise.then((resultSet) => { - console.info(`ResultSet column names: ${resultSet.columnNames}`); - console.info(`ResultSet column count: ${resultSet.columnCount}`); + console.info(`ResultSet column names: ${resultSet.columnNames}, column count: ${resultSet.columnCount}`); + // resultSet是一个数据集合的游标，默认指向第-1个记录，有效的数据从0开始。 + while(resultSet.goToNextRow()) { + const id = resultSet.getLong(resultSet.getColumnIndex("ID")); + const name = resultSet.getString(resultSet.getColumnIndex("NAME")); + const age = resultSet.getLong(resultSet.getColumnIndex("AGE")); + const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY")); + console.info(`id=${id}, name=${name}, age=${age}, salary=${salary}`); + } + // 释放数据集的内存 + resultSet.close(); }).catch((err) => { console.error(`Query failed, code is ${err.code},message is ${err.message}`); }) @@ -2164,8 +2182,17 @@ store.query("EMPLOYEE", predicates, ["ID", "NAME", "AGE", "SALARY", "CODES"], fu console.error(`Query failed, code is ${err.code},message is ${err.message}`); return; } - console.info(`ResultSet column names: ${resultSet.columnNames}`); - console.info(`ResultSet column count: ${resultSet.columnCount}`); + console.info(`ResultSet column names: ${resultSet.columnNames}, column count: ${resultSet.columnCount}`); + // resultSet是一个数据集合的游标，默认指向第-1个记录，有效的数据从0开始。 + while(resultSet.goToNextRow()) { + const id = resultSet.getLong(resultSet.getColumnIndex("ID")); + const name = resultSet.getString(resultSet.getColumnIndex("NAME")); + const age = resultSet.getLong(resultSet.getColumnIndex("AGE")); + const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY")); + console.info(`id=${id}, name=${name}, age=${age}, salary=${salary}`); + } + // 释放数据集的内存 + resultSet.close(); }) ``` @@ -2211,8 +2238,17 @@ let predicates = new dataSharePredicates.DataSharePredicates(); predicates.equalTo("NAME", "Rose"); let promise = store.query("EMPLOYEE", predicates, ["ID", "NAME", "AGE", "SALARY", "CODES"]); promise.then((resultSet) => { - console.info(`ResultSet column names: ${resultSet.columnNames}`); - console.info(`ResultSet column count: ${resultSet.columnCount}`); + console.info(`ResultSet column names: ${resultSet.columnNames}, column count: ${resultSet.columnCount}`); + // resultSet是一个数据集合的游标，默认指向第-1个记录，有效的数据从0开始。 + while(resultSet.goToNextRow()) { + const id = resultSet.getLong(resultSet.getColumnIndex("ID")); + const name = resultSet.getString(resultSet.getColumnIndex("NAME")); + const age = resultSet.getLong(resultSet.getColumnIndex("AGE")); + const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY")); + console.info(`id=${id}, name=${name}, age=${age}, salary=${salary}`); + } + // 释放数据集的内存 + resultSet.close(); }).catch((err) => { console.error(`Query failed, code is ${err.code},message is ${err.message}`); }) @@ -2273,8 +2309,17 @@ store.remoteQuery(deviceId, "EMPLOYEE", predicates, ["ID", "NAME", "AGE", "SALAR console.error(`Failed to remoteQuery, code is ${err.code},message is ${err.message}`); return; } - console.info(`ResultSet column names: ${resultSet.columnNames}`); - console.info(`ResultSet column count: ${resultSet.columnCount}`); + console.info(`ResultSet column names: ${resultSet.columnNames}, column count: ${resultSet.columnCount}`); + // resultSet是一个数据集合的游标，默认指向第-1个记录，有效的数据从0开始。 + while(resultSet.goToNextRow()) { + const id = resultSet.getLong(resultSet.getColumnIndex("ID")); + const name = resultSet.getString(resultSet.getColumnIndex("NAME")); + const age = resultSet.getLong(resultSet.getColumnIndex("AGE")); + const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY")); + console.info(`id=${id}, name=${name}, age=${age}, salary=${salary}`); + } + // 释放数据集的内存 + resultSet.close(); } ) ``` @@ -2335,8 +2380,17 @@ let predicates = new relationalStore.RdbPredicates('EMPLOYEE'); predicates.greaterThan("id", 0); let promise = store.remoteQuery(deviceId, "EMPLOYEE", predicates, ["ID", "NAME", "AGE", "SALARY", "CODES"]); promise.then((resultSet) => { - console.info(`ResultSet column names: ${resultSet.columnNames}`); - console.info(`ResultSet column count: ${resultSet.columnCount}`); + console.info(`ResultSet column names: ${resultSet.columnNames}, column count: ${resultSet.columnCount}`); + // resultSet是一个数据集合的游标，默认指向第-1个记录，有效的数据从0开始。 + while(resultSet.goToNextRow()) { + const id = resultSet.getLong(resultSet.getColumnIndex("ID")); + const name = resultSet.getString(resultSet.getColumnIndex("NAME")); + const age = resultSet.getLong(resultSet.getColumnIndex("AGE")); + const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY")); + console.info(`id=${id}, name=${name}, age=${age}, salary=${salary}`); + } + // 释放数据集的内存 + resultSet.close(); }).catch((err) => { console.error(`Failed to remoteQuery, code is ${err.code},message is ${err.message}`); }) @@ -2374,8 +2428,17 @@ store.querySql("SELECT * FROM EMPLOYEE CROSS JOIN BOOK WHERE BOOK.NAME = ?", ['s console.error(`Query failed, code is ${err.code},message is ${err.message}`); return; } - console.info(`ResultSet column names: ${resultSet.columnNames}`); - console.info(`ResultSet column count: ${resultSet.columnCount}`); + console.info(`ResultSet column names: ${resultSet.columnNames}, column count: ${resultSet.columnCount}`); + // resultSet是一个数据集合的游标，默认指向第-1个记录，有效的数据从0开始。 + while(resultSet.goToNextRow()) { + const id = resultSet.getLong(resultSet.getColumnIndex("ID")); + const name = resultSet.getString(resultSet.getColumnIndex("NAME")); + const age = resultSet.getLong(resultSet.getColumnIndex("AGE")); + const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY")); + console.info(`id=${id}, name=${name}, age=${age}, salary=${salary}`); + } + // 释放数据集的内存 + resultSet.close(); }) ``` @@ -2413,8 +2476,17 @@ querySql(sql: string, bindArgs?: Array<ValueType>):Promise<ResultSet> ```js let promise = store.querySql("SELECT * FROM EMPLOYEE CROSS JOIN BOOK WHERE BOOK.NAME = 'sanguo'"); promise.then((resultSet) => { - console.info(`ResultSet column names: ${resultSet.columnNames}`); - console.info(`ResultSet column count: ${resultSet.columnCount}`); + console.info(`ResultSet column names: ${resultSet.columnNames}, column count: ${resultSet.columnCount}`); + // resultSet是一个数据集合的游标，默认指向第-1个记录，有效的数据从0开始。 + while(resultSet.goToNextRow()) { + const id = resultSet.getLong(resultSet.getColumnIndex("ID")); + const name = resultSet.getString(resultSet.getColumnIndex("NAME")); + const age = resultSet.getLong(resultSet.getColumnIndex("AGE")); + const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY")); + console.info(`id=${id}, name=${name}, age=${age}, salary=${salary}`); + } + // 释放数据集的内存 + resultSet.close(); }).catch((err) => { console.error(`Query failed, code is ${err.code},message is ${err.message}`); }) -- GitLab