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feat: add sqlServer 2005 LimitOffsetProcessor
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开源海哥
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@ -17,6 +17,7 @@ package com.mybatisflex.core.dialect;
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import com.mybatisflex.core.query.CPI;
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import com.mybatisflex.core.query.QueryOrderBy;
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import com.mybatisflex.core.query.QueryTable;
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import com.mybatisflex.core.query.QueryWrapper;
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import com.mybatisflex.core.util.CollectionUtil;
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@ -29,11 +30,23 @@ import static com.mybatisflex.core.constant.SqlConsts.*;
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*/
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public interface LimitOffsetProcessor {
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/**
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* 处理构建 limit 和 offset
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*
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* @param dialect 数据方言
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* @param sql 已经构建的 sql
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* @param queryWrapper 参数内容
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* @param limitRows 用户传入的 limit 参数 可能为 null
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* @param limitOffset 用户传入的 offset 参数，可能为 null
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*/
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StringBuilder process(IDialect dialect, StringBuilder sql, QueryWrapper queryWrapper, Integer limitRows, Integer limitOffset);
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/**
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* MySql 的处理器
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* 适合 {@link DbType#MYSQL,DbType#MARIADB,DbType#H2,DbType#CLICK_HOUSE,DbType#XCloud}
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*/
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LimitOffsetProcessor MYSQL = (sql, queryWrapper, limitRows, limitOffset) -> {
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LimitOffsetProcessor MYSQL = (dialect, sql, queryWrapper, limitRows, limitOffset) -> {
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if (limitRows != null && limitOffset != null) {
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sql.append(LIMIT).append(limitOffset).append(DELIMITER).append(limitRows);
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} else if (limitRows != null) {
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@ -48,7 +61,7 @@ public interface LimitOffsetProcessor {
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* 适合 {@link DbType#SAP_HANA,DbType#IMPALA,DbType#HIGH_GO,DbType#VERTICA,DbType#REDSHIFT}
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* 适合 {@link DbType#OPENGAUSS,DbType#TDENGINE,DbType#UXDB}
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*/
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LimitOffsetProcessor POSTGRESQL = (sql, queryWrapper, limitRows, limitOffset) -> {
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LimitOffsetProcessor POSTGRESQL = (dialect, sql, queryWrapper, limitRows, limitOffset) -> {
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if (limitRows != null && limitOffset != null) {
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sql.append(LIMIT).append(limitRows).append(OFFSET).append(limitOffset);
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} else if (limitRows != null) {
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@ -61,7 +74,7 @@ public interface LimitOffsetProcessor {
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* derby 的处理器
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* 适合 {@link DbType#DERBY,DbType#ORACLE_12C,DbType#SQLSERVER ,DbType#POSTGRE_SQL}
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*/
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LimitOffsetProcessor DERBY = (sql, queryWrapper, limitRows, limitOffset) -> {
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LimitOffsetProcessor DERBY = (dialect, sql, queryWrapper, limitRows, limitOffset) -> {
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if (limitRows != null && limitOffset != null) {
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// OFFSET ** ROWS FETCH NEXT ** ROWS ONLY")
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sql.append(OFFSET).append(limitOffset).append(ROWS_FETCH_NEXT).append(limitRows).append(ROWS_ONLY);
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@ -75,7 +88,7 @@ public interface LimitOffsetProcessor {
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* derby 的处理器
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* 适合 {@link DbType#DERBY,DbType#ORACLE_12C,DbType#SQLSERVER ,DbType#POSTGRE_SQL}
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*/
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LimitOffsetProcessor SQLSERVER = (sql, queryWrapper, limitRows, limitOffset) -> {
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LimitOffsetProcessor SQLSERVER = (dialect, sql, queryWrapper, limitRows, limitOffset) -> {
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if (limitRows != null && limitOffset != null) {
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// OFFSET ** ROWS FETCH NEXT ** ROWS ONLY")
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sql.append(OFFSET).append(limitOffset).append(ROWS_FETCH_NEXT).append(limitRows).append(ROWS_ONLY);
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@ -94,12 +107,29 @@ public interface LimitOffsetProcessor {
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/**
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* SqlServer 2005 limit 处理器
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*/
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LimitOffsetProcessor SQLSERVER_2005 = (sql, queryWrapper, limitRows, limitOffset) -> {
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LimitOffsetProcessor SQLSERVER_2005 = (dialect, sql, queryWrapper, limitRows, limitOffset) -> {
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if (limitRows != null) {
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if (limitOffset == null) {
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limitOffset = 0;
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}
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StringBuilder newSql = new StringBuilder("SELECT * FROM (SELECT TEMP_DATAS.*, ROW_NUMBER() OVER() AS RN FROM (");
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String orderByString;
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List<QueryOrderBy> orderBys = CPI.getOrderBys(queryWrapper);
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if (orderBys == null || orderBys.isEmpty()) {
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orderByString = "ORDER BY CURRENT_TIMESTAMP";
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} else {
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StringBuilder orderBySql = new StringBuilder(ORDER_BY);
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int index = 0;
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List<QueryTable> queryTables = CPI.getQueryTables(queryWrapper);
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for (QueryOrderBy orderBy : orderBys) {
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orderBySql.append(orderBy.toSql(queryTables, dialect));
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if (index != orderBys.size() - 1) {
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orderBySql.append(DELIMITER);
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}
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index++;
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}
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orderByString = orderBySql.toString();
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}
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StringBuilder newSql = new StringBuilder("SELECT * FROM (SELECT TEMP_DATAS.*, ROW_NUMBER() OVER(").append(orderByString).append(") AS RN FROM (");
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newSql.append(sql).append(") AS TEMP_DATAS) WHERE RN > ").append(limitOffset).append(" AND RN <= ").append(limitRows + limitRows);
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return newSql;
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}
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@ -112,7 +142,7 @@ public interface LimitOffsetProcessor {
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* 适合 {@link DbType#INFORMIX}
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* 文档 {@link <a href="https://www.ibm.com/docs/en/informix-servers/14.10?topic=clause-restricting-return-values-skip-limit-first-options">https://www.ibm.com/docs/en/informix-servers/14.10?topic=clause-restricting-return-values-skip-limit-first-options</a>}
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*/
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LimitOffsetProcessor INFORMIX = (sql, queryWrapper, limitRows, limitOffset) -> {
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LimitOffsetProcessor INFORMIX = (dialect, sql, queryWrapper, limitRows, limitOffset) -> {
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if (limitRows != null && limitOffset != null) {
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// SELECT SKIP 2 FIRST 1 * FROM
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sql.insert(6, SKIP + limitOffset + FIRST + limitRows);
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@ -126,7 +156,7 @@ public interface LimitOffsetProcessor {
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* Firebird 的处理器
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* 适合 {@link DbType#FIREBIRD}
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*/
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LimitOffsetProcessor FIREBIRD = (sql, queryWrapper, limitRows, limitOffset) -> {
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LimitOffsetProcessor FIREBIRD = (dialect, sql, queryWrapper, limitRows, limitOffset) -> {
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if (limitRows != null && limitOffset != null) {
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// ROWS 2 TO 3
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sql.append(ROWS).append(limitOffset).append(TO).append(limitOffset + limitRows);
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@ -140,7 +170,7 @@ public interface LimitOffsetProcessor {
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* Oracle11g及以下数据库的处理器
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* 适合 {@link DbType#ORACLE,DbType#DM,DbType#GAUSS}
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*/
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LimitOffsetProcessor ORACLE = (sql, queryWrapper, limitRows, limitOffset) -> {
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LimitOffsetProcessor ORACLE = (dialect, sql, queryWrapper, limitRows, limitOffset) -> {
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if (limitRows != null) {
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if (limitOffset == null) {
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limitOffset = 0;
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@ -157,7 +187,7 @@ public interface LimitOffsetProcessor {
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* Sybase 处理器
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* 适合 {@link DbType#SYBASE}
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*/
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LimitOffsetProcessor SYBASE = (sql, queryWrapper, limitRows, limitOffset) -> {
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LimitOffsetProcessor SYBASE = (dialect, sql, queryWrapper, limitRows, limitOffset) -> {
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if (limitRows != null && limitOffset != null) {
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//SELECT TOP 1 START AT 3 * FROM
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sql.insert(6, TOP + limitRows + START_AT + (limitOffset + 1));
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@ -168,13 +198,4 @@ public interface LimitOffsetProcessor {
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};
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/**
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* 处理构建 limit 和 offset
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*
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* @param sql 已经构建的 sql
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* @param queryWrapper 参数内容
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* @param limitRows 用户传入的 limit 参数 可能为 null
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* @param limitOffset 用户传入的 offset 参数，可能为 null
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*/
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StringBuilder process(StringBuilder sql, QueryWrapper queryWrapper, Integer limitRows, Integer limitOffset);
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}
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@ -1051,7 +1051,7 @@ public class CommonsDialectImpl implements IDialect {
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* 构建 limit 和 offset 的参数
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*/
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protected StringBuilder buildLimitOffsetSql(StringBuilder sqlBuilder, QueryWrapper queryWrapper, Integer limitRows, Integer limitOffset) {
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return limitOffsetProcessor.process(sqlBuilder, queryWrapper, limitRows, limitOffset);
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return limitOffsetProcessor.process(this, sqlBuilder, queryWrapper, limitRows, limitOffset);
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}
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