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修复Oracle下特殊表名导致meta信息获取不到问题
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parent
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@ -1,26 +0,0 @@
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/*
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* Copyright (c) 2023 looly(loolly@aliyun.com)
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* Hutool is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* https://license.coscl.org.cn/MulanPSL2
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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package org.dromara.hutool.db;
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import org.dromara.hutool.core.convert.Convert;
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import org.dromara.hutool.db.config.DSKeys;
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import org.dromara.hutool.log.level.Level;
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import org.dromara.hutool.setting.Setting;
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/**
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* 数据库操作工具类
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*
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* @author Looly
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*/
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public final class DbUtil {
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}
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@ -16,15 +16,13 @@ import org.dromara.hutool.core.collection.ListUtil;
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import org.dromara.hutool.core.convert.Convert;
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import org.dromara.hutool.core.io.IoUtil;
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import org.dromara.hutool.core.text.StrUtil;
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import org.dromara.hutool.core.util.ObjUtil;
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import org.dromara.hutool.db.DbException;
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import org.dromara.hutool.db.Entity;
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import javax.sql.DataSource;
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import java.sql.*;
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import java.util.ArrayList;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.*;
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/**
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* 数据库元数据信息工具类
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@ -214,79 +212,59 @@ public class MetaUtil {
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* @return Table对象
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* @since 5.7.22
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*/
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public static Table getTableMeta(final DataSource ds, String catalog, String schema, final String tableName) {
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final Table table = Table.of(tableName);
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public static Table getTableMeta(final DataSource ds, final String catalog, final String schema, final String tableName) {
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Connection conn = null;
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try {
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conn = ds.getConnection();
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// catalog和schema获取失败默认使用null代替
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if (null == catalog) {
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catalog = getCatalog(conn);
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}
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table.setCatalog(catalog);
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if (null == schema) {
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schema = getSchema(conn);
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}
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table.setSchema(schema);
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final DatabaseMetaData metaData = conn.getMetaData();
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// 获得表元数据(表注释)
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try (final ResultSet rs = metaData.getTables(catalog, schema, tableName, new String[]{TableType.TABLE.value()})) {
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if (null != rs) {
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if (rs.next()) {
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table.setComment(rs.getString("REMARKS"));
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}
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}
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}
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// 获得主键
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try (final ResultSet rs = metaData.getPrimaryKeys(catalog, schema, tableName)) {
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if (null != rs) {
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while (rs.next()) {
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table.addPk(rs.getString("COLUMN_NAME"));
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}
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}
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}
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// 获得列
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try (final ResultSet rs = metaData.getColumns(catalog, schema, tableName, null)) {
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if (null != rs) {
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while (rs.next()) {
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table.setColumn(Column.of(table, rs));
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}
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}
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}
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// 获得索引信息(since 5.7.23)
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try (final ResultSet rs = metaData.getIndexInfo(catalog, schema, tableName, false, false)) {
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final Map<String, IndexInfo> indexInfoMap = new LinkedHashMap<>();
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if (null != rs) {
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while (rs.next()) {
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//排除tableIndexStatistic类型索引
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if (0 == rs.getShort("TYPE")) {
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continue;
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}
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final String indexName = rs.getString("INDEX_NAME");
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final String key = StrUtil.join("&", tableName, indexName);
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// 联合索引情况下一个索引会有多个列,此处须组合索引列到一个索引信息对象下
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IndexInfo indexInfo = indexInfoMap.get(key);
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if (null == indexInfo) {
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indexInfo = new IndexInfo(rs.getBoolean("NON_UNIQUE"), indexName, tableName, schema, catalog);
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indexInfoMap.put(key, indexInfo);
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}
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indexInfo.getColumnIndexInfoList().add(ColumnIndexInfo.of(rs));
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}
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}
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table.setIndexInfoList(ListUtil.of(indexInfoMap.values()));
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}
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} catch (final SQLException e) {
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throw new DbException("Get columns error!", e);
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return getTableMeta(conn, catalog, schema, tableName);
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} catch (final SQLException e){
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throw new DbException(e);
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} finally {
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IoUtil.closeQuietly(conn);
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}
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}
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/**
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* 获得表的元信息<br>
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* 注意如果需要获取注释,某些数据库如MySQL,需要在配置中添加:
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* <pre>
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* remarks = true
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* useInformationSchema = true
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* </pre>
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*
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* @param conn 数据库连接对象,使用结束后不会关闭。
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* @param tableName 表名
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* @param catalog catalog name,{@code null}表示自动获取,见:{@link #getCatalog(Connection)}
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* @param schema a schema name pattern,{@code null}表示自动获取,见:{@link #getSchema(Connection)}
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* @return Table对象
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* @since 5.8.28
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*/
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public static Table getTableMeta(final Connection conn, String catalog, String schema, final String tableName) {
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final Table table = Table.of(tableName);
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// catalog和schema获取失败默认使用null代替
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if (null == catalog) {
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catalog = getCatalog(conn);
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}
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table.setCatalog(catalog);
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if (null == schema) {
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schema = getSchema(conn);
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}
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table.setSchema(schema);
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final DatabaseMetaData metaData = getMetaData(conn);
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// 获取原始表名
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final String pureTableName = unWrapIfOracle(metaData, tableName);
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table.setPureTableName(pureTableName);
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// 获得表元数据(表注释)
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table.setRemarks(getRemarks(metaData, catalog, schema, pureTableName));
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// 获得主键
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table.setPkNames(getPrimaryKeys(metaData, catalog, schema, pureTableName));
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// 获得列
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fetchColumns(metaData, catalog, schema, table);
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// 获得索引信息(since 5.7.23)
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final Map<String, IndexInfo> indexInfoMap = getIndexInfo(metaData, catalog, schema, tableName);
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table.setIndexInfoList(ListUtil.of(indexInfoMap.values()));
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return table;
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}
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@ -330,4 +308,177 @@ public class MetaUtil {
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return null;
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}
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/**
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* 获取数据库连接的元数据信息。
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*
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* @param conn 数据库连接对象。如果连接为null,则返回null。
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* @return DatabaseMetaData 数据库元数据对象,如果获取失败或连接为null,则返回null。
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* @since 5.8.28
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*/
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public static DatabaseMetaData getMetaData(final Connection conn) {
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if (null == conn) {
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return null;
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}
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try {
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return conn.getMetaData();
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} catch (final SQLException e) {
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// ignore
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}
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return null;
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}
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/**
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* 获取指定表的备注信息。
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*
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* @param metaData 数据库元数据,用于查询表信息。
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* @param catalog 目录名称,用于指定查询的数据库(可为{@code null},表示任意目录)。
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* @param schema 方案名称,用于指定表所属的schema(可为{@code null},表示任意schema)。
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* @param tableName 表名称,指定要查询备注信息的表。
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* @return 表的备注信息。未找到指定的表或查询成功但无结果,则返回null。
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* @since 5.8.28
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*/
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public static String getRemarks(final DatabaseMetaData metaData, final String catalog, final String schema, String tableName) {
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// issue#I9BANE Oracle中特殊表名需要解包
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tableName = unWrapIfOracle(metaData, tableName);
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try (final ResultSet rs = metaData.getTables(catalog, schema, tableName, new String[]{TableType.TABLE.value()})) {
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if (null != rs) {
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if (rs.next()) {
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return rs.getString("REMARKS");
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}
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}
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} catch (final SQLException e) {
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throw new DbException(e);
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}
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// 未找到指定的表或查询成功但无结果
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return null;
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}
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/**
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* 获取指定表的主键列名列表。
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*
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* @param metaData 数据库元数据,用于查询主键信息。
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* @param catalog 数据库目录,用于限定查询范围。
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* @param schema 数据库模式,用于限定查询范围。
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* @param tableName 表名,指定要查询主键的表。
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* @return 主键列名的列表。如果表没有主键,则返回空列表。
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* @throws DbException 如果查询过程中发生SQLException,将抛出DbException。
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* @since 5.8.28
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*/
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public static Set<String> getPrimaryKeys(final DatabaseMetaData metaData, final String catalog, final String schema, String tableName) {
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// issue#I9BANE Oracle中特殊表名需要解包
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tableName = unWrapIfOracle(metaData, tableName);
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// 初始化主键列表
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Set<String> primaryKeys = null;
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try (final ResultSet rs = metaData.getPrimaryKeys(catalog, schema, tableName)) {
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// 如果结果集不为空,遍历结果集获取主键列名
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if (null != rs) {
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primaryKeys = new LinkedHashSet<>(rs.getFetchSize(), 1);
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while (rs.next()) {
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primaryKeys.add(rs.getString("COLUMN_NAME"));
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}
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}
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} catch (final SQLException e) {
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// 将SQLException转换为自定义的DbException抛出
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throw new DbException(e);
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}
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return primaryKeys;
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}
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/**
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* 获取指定表的索引信息。
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*
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* @param metaData 数据库元数据,用于查询索引信息。
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* @param catalog 数据库目录,用于限定查询范围。
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* @param schema 数据库模式,用于限定查询范围。
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* @param tableName 需要查询索引信息的表名。
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* @return 返回一个映射,其中包含表的索引信息。键是表名和索引名的组合,值是索引信息对象。
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* @since 5.8.28
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*/
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public static Map<String, IndexInfo> getIndexInfo(final DatabaseMetaData metaData, final String catalog, final String schema, final String tableName) {
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final Map<String, IndexInfo> indexInfoMap = new LinkedHashMap<>();
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try (final ResultSet rs = metaData.getIndexInfo(catalog, schema, tableName, false, false)) {
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if (null != rs) {
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while (rs.next()) {
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//排除统计(tableIndexStatistic)类型索引
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if (0 == rs.getShort("TYPE")) {
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continue;
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}
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final String indexName = rs.getString("INDEX_NAME");
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final String key = StrUtil.join("&", tableName, indexName);
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// 联合索引情况下一个索引会有多个列,此处须组合索引列到一个索引信息对象下
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IndexInfo indexInfo = indexInfoMap.get(key);
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if (null == indexInfo) {
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indexInfo = new IndexInfo(rs.getBoolean("NON_UNIQUE"), indexName, tableName, schema, catalog);
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indexInfoMap.put(key, indexInfo);
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}
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indexInfo.getColumnIndexInfoList().add(ColumnIndexInfo.of(rs));
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}
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}
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} catch (final SQLException e) {
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throw new DbException(e);
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}
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return indexInfoMap;
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}
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/**
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* 判断当前数据库是否为Oracle。
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*
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* @param metaData 数据库元数据,用于获取数据库产品名称。
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* @return 返回true表示当前数据库是Oracle,否则返回false。
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* @throws DbException 如果获取数据库产品名称时发生SQLException,将抛出DbException。
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* @since 5.8.28
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*/
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public static boolean isOracle(final DatabaseMetaData metaData) throws DbException {
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try {
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return StrUtil.equalsIgnoreCase("Oracle", metaData.getDatabaseProductName());
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} catch (final SQLException e) {
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throw new DbException(e);
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}
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}
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/**
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* 如果是在Oracle数据库中并且表名被双引号包裹,则移除这些引号。
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*
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* @param metaData 数据库元数据,用于判断是否为Oracle数据库。
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* @param tableName 待处理的表名,可能被双引号包裹。
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* @return 处理后的表名,如果原表名被双引号包裹且是Oracle数据库,则返回去除了双引号的表名;否则返回原表名。
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*/
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private static String unWrapIfOracle(final DatabaseMetaData metaData, String tableName) {
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final char wrapChar = '"';
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// 判断表名是否被双引号包裹且当前数据库为Oracle,如果是,则移除双引号
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if (StrUtil.isWrap(tableName, wrapChar) && isOracle(metaData)) {
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tableName = StrUtil.unWrap(tableName, wrapChar);
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}
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return tableName;
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}
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/**
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* 从数据库元数据中获取指定表的列信息。
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*
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* @param metaData 数据库元数据,用于查询列信息。
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* @param catalog 数据库目录,用于过滤列信息。
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* @param schema 数据库模式,用于过滤列信息。
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* @param table 表对象,用于存储获取到的列信息。
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*/
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private static void fetchColumns(final DatabaseMetaData metaData, final String catalog, final String schema, final Table table) {
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// issue#I9BANE Oracle中特殊表名需要解包
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final String tableName = unWrapIfOracle(metaData, ObjUtil.defaultIfNull(table.getPureTableName(), table::getTableName));
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// 获得列
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try (final ResultSet rs = metaData.getColumns(catalog, schema, tableName, null)) {
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if (null != rs) {
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while (rs.next()) {
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table.addColumn(Column.of(table, rs));
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}
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}
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} catch (final SQLException e) {
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throw new DbException(e);
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}
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}
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}
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@ -37,13 +37,17 @@ public class Table implements Serializable, Cloneable {
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*/
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private String catalog;
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/**
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* 表名
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* 表名,特殊表名一般带包装符号,如:"1234"
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*/
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private String tableName;
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/**
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* 表名(无包装符号),如"1234"对应的pureTableName为1234
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*/
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private String pureTableName;
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/**
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* 注释
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*/
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private String comment;
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private String remarks;
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/**
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* 主键字段名列表
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*/
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@ -57,6 +61,12 @@ public class Table implements Serializable, Cloneable {
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*/
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private final Map<String, Column> columns = new LinkedHashMap<>();
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/**
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* 根据提供的表名创建一个新的Table实例。
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*
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* @param tableName 表的名称,用于标识数据库中的特定表。
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* @return 返回一个新的Table实例,其名称为传入的表名。
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*/
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public static Table of(final String tableName) {
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return new Table(tableName);
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}
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@ -137,23 +147,41 @@ public class Table implements Serializable, Cloneable {
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this.tableName = tableName;
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}
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/**
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* 获取表名(无包装符号),如"1234"对应的pureTableName为1234
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*
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* @return 表名(无包装符号)
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*/
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public String getPureTableName() {
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return pureTableName;
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}
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/**
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* 设置表名(无包装符号),如"1234"对应的pureTableName为1234
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*
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* @param pureTableName 表名
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*/
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public void setPureTableName(final String pureTableName) {
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this.pureTableName = pureTableName;
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}
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/**
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* 获取注释
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*
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* @return 注释
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*/
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public String getComment() {
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return comment;
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public String getRemarks() {
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return remarks;
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}
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/**
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* 设置注释
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*
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* @param comment 注释
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* @param remarks 注释
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* @return this
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*/
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public Table setComment(final String comment) {
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this.comment = comment;
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public Table setRemarks(final String remarks) {
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this.remarks = remarks;
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return this;
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}
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@ -193,7 +221,7 @@ public class Table implements Serializable, Cloneable {
|
||||
* @param column 列对象
|
||||
* @return 自己
|
||||
*/
|
||||
public Table setColumn(final Column column) {
|
||||
public Table addColumn(final Column column) {
|
||||
this.columns.put(column.getName(), column);
|
||||
return this;
|
||||
}
|
||||
|
@ -12,11 +12,11 @@ public class IssueI9BANETest {
|
||||
@Test
|
||||
@Disabled
|
||||
void metaTest() {
|
||||
final Db db = Db.of("orcl");
|
||||
db.find(Entity.of("\"1234\""));
|
||||
|
||||
final DSWrapper ds = DSUtil.getDS("orcl");
|
||||
final Table tableMeta = MetaUtil.getTableMeta(ds, null, null, "\"1234\"");
|
||||
Console.log(tableMeta.getIndexInfoList());
|
||||
Console.log("remarks: " + tableMeta.getRemarks());
|
||||
Console.log("pks: " + tableMeta.getPkNames());
|
||||
Console.log("columns: " + tableMeta.getColumns());
|
||||
Console.log("index: " + tableMeta.getIndexInfoList());
|
||||
}
|
||||
}
|
||||
|
Loading…
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Reference in New Issue
Block a user