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471 lines
24 KiB
C#
471 lines
24 KiB
C#
using FreeSql.Internal.Model;
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.Common;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace FreeSql.Internal.CommonProvider {
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abstract class Select0Provider<TSelect, T1> : ISelect0<TSelect, T1> where TSelect : class where T1 : class {
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protected int _limit, _skip;
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protected string _select = "SELECT ", _orderby, _groupby, _having;
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protected StringBuilder _where = new StringBuilder();
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protected List<DbParameter> _params = new List<DbParameter>();
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internal List<SelectTableInfo> _tables = new List<SelectTableInfo>();
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protected StringBuilder _join = new StringBuilder();
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protected (int seconds, string key) _cache = (0, null);
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protected IFreeSql _orm;
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protected CommonUtils _commonUtils;
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protected CommonExpression _commonExpression;
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internal static void CopyData(Select0Provider<TSelect, T1> from, object to) {
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var toType = to?.GetType();
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if (toType == null) return;
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toType.GetField("_limit", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._limit);
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toType.GetField("_skip", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._skip);
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toType.GetField("_select", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._select);
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toType.GetField("_where", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, new StringBuilder().Append(from._where.ToString()));
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toType.GetField("_params", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, new List<DbParameter>(from._params.ToArray()));
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toType.GetField("_tables", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, new List<SelectTableInfo>(from._tables.ToArray()));
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toType.GetField("_join", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, new StringBuilder().Append(from._join.ToString()));
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toType.GetField("_cache", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._cache);
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//toType.GetField("_orm", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._orm);
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//toType.GetField("_commonUtils", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._commonUtils);
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//toType.GetField("_commonExpression", BindingFlags.Instance | BindingFlags.NonPublic)?.SetValue(to, from._commonExpression);
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}
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public Select0Provider(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression, object dywhere) {
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_orm = orm;
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_commonUtils = commonUtils;
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_commonExpression = commonExpression;
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_tables.Add(new SelectTableInfo { Table = _commonUtils.GetTableByEntity(typeof(T1)), Alias = "a", On = null, Type = SelectTableInfoType.From });
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this.Where(_commonUtils.WhereObject(_tables.First().Table, "a.", dywhere));
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if (_orm.CodeFirst.IsAutoSyncStructure) _orm.CodeFirst.SyncStructure<T1>();
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}
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public bool Any() {
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this.Limit(1);
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return this.ToList<int>("1").FirstOrDefault() == 1;
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}
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async public Task<bool> AnyAsync() {
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this.Limit(1);
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return (await this.ToListAsync<int>("1")).FirstOrDefault() == 1;
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}
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public TSelect Caching(int seconds, string key = null) {
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_cache = (seconds, key);
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return this as TSelect;
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}
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public long Count() => this.ToList<int>("count(1)").FirstOrDefault();
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async public Task<long> CountAsync() => (await this.ToListAsync<int>("count(1)")).FirstOrDefault();
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public TSelect Count(out long count) {
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count = this.Count();
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return this as TSelect;
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}
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public TSelect GroupBy(string sql, object parms = null) {
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_groupby = sql;
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if (string.IsNullOrEmpty(_groupby)) return this as TSelect;
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_groupby = string.Concat(" \r\nGROUP BY ", _groupby);
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if (parms != null) _params.AddRange(_commonUtils.GetDbParamtersByObject(_groupby, parms));
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return this as TSelect;
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}
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public TSelect Having(string sql, object parms = null) {
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if (string.IsNullOrEmpty(_groupby) || string.IsNullOrEmpty(sql)) return this as TSelect;
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_having = string.Concat(_having, " AND (", sql, ")");
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if (parms != null) _params.AddRange(_commonUtils.GetDbParamtersByObject(sql, parms));
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return this as TSelect;
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}
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public TSelect LeftJoin(Expression<Func<T1, bool>> exp) => this.InternalJoin(exp?.Body, SelectTableInfoType.LeftJoin);
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public TSelect InnerJoin(Expression<Func<T1, bool>> exp) => this.InternalJoin(exp?.Body, SelectTableInfoType.InnerJoin);
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public TSelect RightJoin(Expression<Func<T1, bool>> exp) => this.InternalJoin(exp?.Body, SelectTableInfoType.RightJoin);
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public TSelect LeftJoin<T2>(Expression<Func<T1, T2, bool>> exp) => this.InternalJoin(exp?.Body, SelectTableInfoType.LeftJoin);
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public TSelect InnerJoin<T2>(Expression<Func<T1, T2, bool>> exp) => this.InternalJoin(exp?.Body, SelectTableInfoType.InnerJoin);
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public TSelect RightJoin<T2>(Expression<Func<T1, T2, bool>> exp) => this.InternalJoin(exp?.Body, SelectTableInfoType.RightJoin);
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public TSelect InnerJoin(string sql, object parms = null) {
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if (string.IsNullOrEmpty(sql)) return this as TSelect;
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_join.Append(" \r\nINNER JOIN ").Append(sql);
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if (parms != null) _params.AddRange(_commonUtils.GetDbParamtersByObject(sql, parms));
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return this as TSelect;
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}
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public TSelect LeftJoin(string sql, object parms = null) {
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if (string.IsNullOrEmpty(sql)) return this as TSelect;
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_join.Append(" \r\nLEFT JOIN ").Append(sql);
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if (parms != null) _params.AddRange(_commonUtils.GetDbParamtersByObject(sql, parms));
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return this as TSelect;
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}
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public TSelect Limit(int limit) {
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_limit = limit;
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return this as TSelect;
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}
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public TSelect Master() {
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_select = " SELECT ";
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return this as TSelect;
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}
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public TSelect Offset(int offset) => this.Skip(offset) as TSelect;
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public TSelect OrderBy(string sql, object parms = null) {
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if (string.IsNullOrEmpty(sql)) _orderby = null;
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var isnull = string.IsNullOrEmpty(_orderby);
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_orderby = string.Concat(isnull ? " \r\nORDER BY " : "", _orderby, isnull ? "" : ", ", sql);
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if (parms != null) _params.AddRange(_commonUtils.GetDbParamtersByObject(sql, parms));
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return this as TSelect;
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}
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public TSelect Page(int pageIndex, int pageSize) {
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this.Skip(Math.Max(0, pageIndex - 1) * pageSize);
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return this.Limit(pageSize) as TSelect;
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}
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public TSelect RightJoin(string sql, object parms = null) {
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if (string.IsNullOrEmpty(sql)) return this as TSelect;
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_join.Append(" \r\nRIGHT JOIN ").Append(sql);
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if (parms != null) _params.AddRange(_commonUtils.GetDbParamtersByObject(sql, parms));
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return this as TSelect;
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}
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public TSelect Skip(int offset) {
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_skip = offset;
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return this as TSelect;
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}
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public TSelect Take(int limit) => this.Limit(limit) as TSelect;
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public List<TTuple> ToList<TTuple>(string field) {
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var sql = this.ToSql(field);
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if (_cache.seconds > 0 && string.IsNullOrEmpty(_cache.key)) _cache.key = sql;
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return _orm.Cache.Shell(_cache.key, _cache.seconds, () => {
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List<TTuple> ret = new List<TTuple>();
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Type type = typeof(TTuple);
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_orm.Ado.ExecuteReader(dr => {
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var read = Utils.ExecuteArrayRowReadClassOrTuple(type, null, dr);
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ret.Add((TTuple)read.Value);
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}, CommandType.Text, sql, _params.ToArray());
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return ret;
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});
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}
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public Task<List<TTuple>> ToListAsync<TTuple>(string field) {
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var sql = this.ToSql(field);
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if (_cache.seconds > 0 && string.IsNullOrEmpty(_cache.key)) _cache.key = sql;
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return _orm.Cache.ShellAsync(_cache.key, _cache.seconds, async () => {
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List<TTuple> ret = new List<TTuple>();
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Type type = typeof(TTuple);
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await _orm.Ado.ExecuteReaderAsync(dr => {
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var read = Utils.ExecuteArrayRowReadClassOrTuple(type, null, dr);
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ret.Add((TTuple)read.Value);
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return Task.CompletedTask;
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}, CommandType.Text, sql, _params.ToArray());
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return ret;
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});
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}
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public List<T1> ToList() {
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var af = this.GetAllFieldExpressionTree();
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var sql = this.ToSql(af.Field);
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if (_cache.seconds > 0 && string.IsNullOrEmpty(_cache.key)) _cache.key = $"{sql}{string.Join("|", _params.Select(a => a.Value))}";
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return _orm.Cache.Shell(_cache.key, _cache.seconds, () => {
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List<T1> ret = new List<T1>();
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_orm.Ado.ExecuteReader(dr => {
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ret.Add(af.Read(dr));
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}, CommandType.Text, sql, _params.ToArray());
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return ret;
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});
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}
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async public Task<List<T1>> ToListAsync() {
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var af = this.GetAllFieldExpressionTree();
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var sql = this.ToSql(af.Field);
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if (_cache.seconds > 0 && string.IsNullOrEmpty(_cache.key)) _cache.key = $"{sql}{string.Join("|", _params.Select(a => a.Value))}";
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return await _orm.Cache.ShellAsync(_cache.key, _cache.seconds, async () => {
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List<T1> ret = new List<T1>();
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await _orm.Ado.ExecuteReaderAsync(dr => {
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ret.Add(af.Read(dr));
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return Task.CompletedTask;
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}, CommandType.Text, sql, _params.ToArray());
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return ret;
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});
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}
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public T1 ToOne() {
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this.Limit(1);
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return this.ToList().FirstOrDefault();
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}
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async public Task<T1> ToOneAsync() {
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this.Limit(1);
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return (await this.ToListAsync()).FirstOrDefault();
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}
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protected List<TReturn> ToListMapReader<TReturn>((ReadAnonymousTypeInfo map, string field) af) {
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var sql = this.ToSql(af.field);
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if (_cache.seconds > 0 && string.IsNullOrEmpty(_cache.key)) _cache.key = $"{sql}{string.Join("|", _params.Select(a => a.Value))}";
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return _orm.Cache.Shell(_cache.key, _cache.seconds, () => {
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List<TReturn> ret = new List<TReturn>();
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Type type = typeof(TReturn);
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_orm.Ado.ExecuteReader(dr => {
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var index = -1;
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ret.Add((TReturn)_commonExpression.ReadAnonymous(af.map, dr, ref index));
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}, CommandType.Text, sql, _params.ToArray());
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return ret;
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});
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}
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async protected Task<List<TReturn>> ToListMapReaderAsync<TReturn>((ReadAnonymousTypeInfo map, string field) af) {
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var sql = this.ToSql(af.field);
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if (_cache.seconds > 0 && string.IsNullOrEmpty(_cache.key)) _cache.key = $"{sql}{string.Join("|", _params.Select(a => a.Value))}";
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return await _orm.Cache.ShellAsync(_cache.key, _cache.seconds, async () => {
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List<TReturn> ret = new List<TReturn>();
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Type type = typeof(TReturn);
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await _orm.Ado.ExecuteReaderAsync(dr => {
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var index = -1;
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ret.Add((TReturn)_commonExpression.ReadAnonymous(af.map, dr, ref index));
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return Task.CompletedTask;
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}, CommandType.Text, sql, _params.ToArray());
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return ret;
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});
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}
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protected (ReadAnonymousTypeInfo map, string field) GetExpressionField(Expression newexp) {
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var map = new ReadAnonymousTypeInfo();
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var field = new StringBuilder();
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var index = 0;
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_commonExpression.ReadAnonymousField(_tables, field, map, ref index, newexp, null);
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return (map, field.Length > 0 ? field.Remove(0, 2).ToString() : null);
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}
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static ConcurrentDictionary<Type, ConstructorInfo> _dicConstructor = new ConcurrentDictionary<Type, ConstructorInfo>();
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static ConcurrentDictionary<string, GetAllFieldExpressionTreeInfo> _dicGetAllFieldExpressionTree = new ConcurrentDictionary<string, GetAllFieldExpressionTreeInfo>();
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public class GetAllFieldExpressionTreeInfo {
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public string Field { get; set; }
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public Func<DbDataReader, T1> Read { get; set; }
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}
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protected GetAllFieldExpressionTreeInfo GetAllFieldExpressionTree() {
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return _dicGetAllFieldExpressionTree.GetOrAdd(string.Join("+", _tables.Select(a => $"{_commonUtils.DbName}-{a.Table.DbName}-{a.Alias}-{a.Type}")), s => {
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var tb1 = _tables.First().Table;
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var type = tb1.TypeLazy ?? tb1.Type;
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var props = tb1.Properties;
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var rowExp = Expression.Parameter(typeof(DbDataReader), "row");
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var returnTarget = Expression.Label(type);
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var retExp = Expression.Variable(type, "ret");
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var dataIndexExp = Expression.Variable(typeof(int), "dataIndex");
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var readExp = Expression.Variable(typeof(Utils.RowInfo), "read");
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var readExpValue = Expression.MakeMemberAccess(readExp, Utils.RowInfo.PropertyValue);
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var readExpDataIndex = Expression.MakeMemberAccess(readExp, Utils.RowInfo.PropertyDataIndex);
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var blockExp = new List<Expression>();
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var ctor = type.GetConstructor(new Type[0]) ?? type.GetConstructors().First();
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blockExp.AddRange(new Expression[] {
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Expression.Assign(retExp, Expression.New(ctor, ctor.GetParameters().Select(a => Expression.Default(a.ParameterType)))),
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Expression.Assign(dataIndexExp, Expression.Constant(0))
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});
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//typeof(Topic).GetMethod("get_Type").IsVirtual
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var field = new StringBuilder();
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var dicfield = new Dictionary<string, bool>();
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var tb = _tables.First();
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var index = 0;
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var otherindex = 0;
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foreach (var prop in props.Values) {
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if (tb.Table.ColumnsByCs.TryGetValue(prop.Name, out var col)) { //普通字段
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if (index > 0) field.Append(", ");
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var quoteName = _commonUtils.QuoteSqlName(col.Attribute.Name);
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field.Append(_commonUtils.QuoteReadColumn(col.CsType, $"{tb.Alias}.{quoteName}"));
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++index;
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if (dicfield.ContainsKey(quoteName)) field.Append(" as").Append(index);
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else dicfield.Add(quoteName, true);
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} else {
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var tb2 = _tables.Where((a, b) => b > 0 &&
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(a.Type == SelectTableInfoType.InnerJoin || a.Type == SelectTableInfoType.LeftJoin || a.Type == SelectTableInfoType.RightJoin) &&
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string.IsNullOrEmpty(a.On) == false &&
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a.Alias.Contains(prop.Name)).FirstOrDefault(); //判断 b > 0 防止 parent 递归关系
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if (tb2 == null && props.Where(pw => pw.Value.PropertyType == prop.PropertyType).Count() == 1)
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tb2 = _tables.Where((a, b) => b > 0 &&
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(a.Type == SelectTableInfoType.InnerJoin || a.Type == SelectTableInfoType.LeftJoin || a.Type == SelectTableInfoType.RightJoin) &&
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string.IsNullOrEmpty(a.On) == false &&
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a.Table.Type == prop.PropertyType).FirstOrDefault();
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if (tb2 == null) continue;
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foreach (var col2 in tb2.Table.Columns.Values) {
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if (index > 0) field.Append(", ");
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var quoteName = _commonUtils.QuoteSqlName(col2.Attribute.Name);
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field.Append(_commonUtils.QuoteReadColumn(col2.CsType, $"{tb2.Alias}.{quoteName}"));
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++index;
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++otherindex;
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if (dicfield.ContainsKey(quoteName)) field.Append(" as").Append(index);
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else dicfield.Add(quoteName, true);
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}
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}
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//只读到二级属性
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var propGetSetMethod = prop.GetSetMethod();
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Expression readExpAssign = null; //加速缓存
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if (prop.PropertyType.IsArray) readExpAssign = Expression.New(Utils.RowInfo.Constructor,
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Utils.GetDataReaderValueBlockExpression(prop.PropertyType, Expression.Call(rowExp, Utils.MethodDataReaderGetValue, dataIndexExp)),
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//Expression.Call(Utils.MethodGetDataReaderValue, new Expression[] { Expression.Constant(prop.PropertyType), Expression.Call(rowExp, Utils.MethodDataReaderGetValue, dataIndexExp) }),
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Expression.Add(dataIndexExp, Expression.Constant(1))
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);
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else {
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var proptypeGeneric = prop.PropertyType;
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if (proptypeGeneric.IsNullableType()) proptypeGeneric = proptypeGeneric.GenericTypeArguments.First();
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if (proptypeGeneric.IsEnum ||
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Utils.dicExecuteArrayRowReadClassOrTuple.ContainsKey(proptypeGeneric)) readExpAssign = Expression.New(Utils.RowInfo.Constructor,
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Utils.GetDataReaderValueBlockExpression(prop.PropertyType, Expression.Call(rowExp, Utils.MethodDataReaderGetValue, dataIndexExp)),
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//Expression.Call(Utils.MethodGetDataReaderValue, new Expression[] { Expression.Constant(prop.PropertyType), Expression.Call(rowExp, Utils.MethodDataReaderGetValue, dataIndexExp) }),
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Expression.Add(dataIndexExp, Expression.Constant(1))
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);
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else {
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readExpAssign = Expression.Call(Utils.MethodExecuteArrayRowReadClassOrTuple, new Expression[] { Expression.Constant(prop.PropertyType), Expression.Constant(null, typeof(int[])), rowExp, dataIndexExp });
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}
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}
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blockExp.AddRange(new Expression[] {
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Expression.Assign(readExp, readExpAssign),
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Expression.IfThen(Expression.GreaterThan(readExpDataIndex, dataIndexExp),
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Expression.Assign(dataIndexExp, readExpDataIndex)),
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Expression.IfThenElse(Expression.Equal(readExpValue, Expression.Constant(null)),
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Expression.Call(retExp, propGetSetMethod, Expression.Default(prop.PropertyType)),
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Expression.Call(retExp, propGetSetMethod, Expression.Convert(readExpValue, prop.PropertyType)))
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});
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}
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if (otherindex == 0) { //不读导航属性，优化单表读取性能
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blockExp.Clear();
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blockExp.AddRange(new Expression[] {
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Expression.Assign(dataIndexExp, Expression.Constant(0)),
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Expression.Assign(readExp, Expression.Call(Utils.MethodExecuteArrayRowReadClassOrTuple, new Expression[] { Expression.Constant(type), Expression.Constant(null, typeof(int[])), rowExp, dataIndexExp })),
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Expression.Assign(retExp, Expression.Convert(readExpValue, type))
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});
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}
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if (tb1.TypeLazy != null) blockExp.Add(Expression.Call(retExp, tb1.TypeLazySetOrm, Expression.Constant(_orm))); //将 orm 传递给 lazy
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blockExp.AddRange(new Expression[] {
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Expression.Return(returnTarget, retExp),
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Expression.Label(returnTarget, Expression.Default(type))
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});
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return new GetAllFieldExpressionTreeInfo {
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Field = field.ToString(),
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Read = Expression.Lambda<Func<DbDataReader, T1>>(Expression.Block(new[] { retExp, dataIndexExp, readExp }, blockExp), new[] { rowExp }).Compile()
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};
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});
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}
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protected (ReadAnonymousTypeInfo map, string field) GetAllFieldReflection() {
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var tb1 = _tables.First().Table;
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var type = tb1.Type;
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var constructor = _dicConstructor.GetOrAdd(type, s => type.GetConstructor(new Type[0]));
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var map = new ReadAnonymousTypeInfo { Consturctor = constructor, ConsturctorType = ReadAnonymousTypeInfoConsturctorType.Properties };
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var field = new StringBuilder();
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var dicfield = new Dictionary<string, bool>();
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var tb = _tables.First();
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var index = 0;
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var ps = tb1.Properties;
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foreach (var p in ps.Values) {
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var child = new ReadAnonymousTypeInfo { Property = p, CsName = p.Name };
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if (tb.Table.ColumnsByCs.TryGetValue(p.Name, out var col)) { //普通字段
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if (index > 0) field.Append(", ");
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var quoteName = _commonUtils.QuoteSqlName(col.Attribute.Name);
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field.Append(_commonUtils.QuoteReadColumn(col.CsType, $"{tb.Alias}.{quoteName}"));
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++index;
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if (dicfield.ContainsKey(quoteName)) field.Append(" as").Append(index);
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else dicfield.Add(quoteName, true);
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} else {
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var tb2 = _tables.Where(a => a.Table.Type == p.PropertyType && a.Alias.Contains(p.Name)).FirstOrDefault();
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if (tb2 == null && ps.Where(pw => pw.Value.PropertyType == p.PropertyType).Count() == 1) tb2 = _tables.Where(a => a.Table.Type == p.PropertyType).FirstOrDefault();
|
|
if (tb2 == null) continue;
|
|
child.Consturctor = tb2.Table.Type.GetConstructor(new Type[0]);
|
|
child.ConsturctorType = ReadAnonymousTypeInfoConsturctorType.Properties;
|
|
foreach (var col2 in tb2.Table.Columns.Values) {
|
|
if (index > 0) field.Append(", ");
|
|
var quoteName = _commonUtils.QuoteSqlName(col2.Attribute.Name);
|
|
field.Append(_commonUtils.QuoteReadColumn(col2.CsType, $"{tb2.Alias}.{quoteName}"));
|
|
++index;
|
|
if (dicfield.ContainsKey(quoteName)) field.Append(" as").Append(index);
|
|
else dicfield.Add(quoteName, true);
|
|
child.Childs.Add(new ReadAnonymousTypeInfo {
|
|
Property = tb2.Table.Type.GetProperty(col2.CsName, BindingFlags.Public | BindingFlags.IgnoreCase | BindingFlags.Instance),
|
|
CsName = col2.CsName });
|
|
}
|
|
}
|
|
map.Childs.Add(child);
|
|
}
|
|
return (map, field.ToString());
|
|
}
|
|
public abstract string ToSql(string field = null);
|
|
|
|
public TSelect Where(string sql, object parms = null) => this.WhereIf(true, sql, parms);
|
|
public TSelect WhereIf(bool condition, string sql, object parms = null) {
|
|
if (condition == false || string.IsNullOrEmpty(sql)) return this as TSelect;
|
|
_where.Append(" AND (").Append(sql).Append(")");
|
|
if (parms != null) _params.AddRange(_commonUtils.GetDbParamtersByObject(sql, parms));
|
|
return this as TSelect;
|
|
}
|
|
#region common
|
|
|
|
protected TMember InternalAvg<TMember>(Expression exp) => this.ToList<TMember>($"avg({_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, true, null)})").FirstOrDefault();
|
|
async protected Task<TMember> InternalAvgAsync<TMember>(Expression exp) => (await this.ToListAsync<TMember>($"avg({_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, true, null)})")).FirstOrDefault();
|
|
protected TMember InternalMax<TMember>(Expression exp) => this.ToList<TMember>($"max({_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, true, null)})").FirstOrDefault();
|
|
async protected Task<TMember> InternalMaxAsync<TMember>(Expression exp) => (await this.ToListAsync<TMember>($"max({_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, true, null)})")).FirstOrDefault();
|
|
protected TMember InternalMin<TMember>(Expression exp) => this.ToList<TMember>($"min({_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, true, null)})").FirstOrDefault();
|
|
async protected Task<TMember> InternalMinAsync<TMember>(Expression exp) => (await this.ToListAsync<TMember>($"min({_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, true, null)})")).FirstOrDefault();
|
|
protected TMember InternalSum<TMember>(Expression exp) => this.ToList<TMember>($"sum({_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, true, null)})").FirstOrDefault();
|
|
async protected Task<TMember> InternalSumAsync<TMember>(Expression exp) => (await this.ToListAsync<TMember>($"sum({_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, true, null)})")).FirstOrDefault();
|
|
|
|
protected ISelectGrouping<TKey> InternalGroupBy<TKey>(Expression columns) {
|
|
var map = new ReadAnonymousTypeInfo();
|
|
var field = new StringBuilder();
|
|
var index = -10000; //临时规则，不返回 as1
|
|
|
|
_commonExpression.ReadAnonymousField(_tables, field, map, ref index, columns, null);
|
|
this.GroupBy(field.Length > 0 ? field.Remove(0, 2).ToString() : null);
|
|
return new SelectGroupingProvider<TKey>(this, map, _commonExpression);
|
|
}
|
|
protected TSelect InternalJoin(Expression exp, SelectTableInfoType joinType) {
|
|
_commonExpression.ExpressionJoinLambda(_tables, joinType, exp, null);
|
|
return this as TSelect;
|
|
}
|
|
protected TSelect InternalJoin<T2>(Expression exp, SelectTableInfoType joinType) {
|
|
var tb = _commonUtils.GetTableByEntity(typeof(T2));
|
|
if (tb == null) throw new ArgumentException("T2 类型错误");
|
|
_tables.Add(new SelectTableInfo { Table = tb, Alias = $"IJ{_tables.Count}", On = null, Type = joinType });
|
|
_commonExpression.ExpressionJoinLambda(_tables, joinType, exp, null);
|
|
return this as TSelect;
|
|
}
|
|
protected TSelect InternalOrderBy(Expression column) => this.OrderBy(_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, column, true, null));
|
|
protected TSelect InternalOrderByDescending(Expression column) => this.OrderBy($"{_commonExpression.ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, column, true, null)} DESC");
|
|
|
|
protected List<TReturn> InternalToList<TReturn>(Expression select) => this.ToListMapReader<TReturn>(this.GetExpressionField(select));
|
|
protected Task<List<TReturn>> InternalToListAsync<TReturn>(Expression select) => this.ToListMapReaderAsync<TReturn>(this.GetExpressionField(select));
|
|
protected string InternalToSql<TReturn>(Expression select) {
|
|
var af = this.GetExpressionField(select);
|
|
return this.ToSql(af.field);
|
|
}
|
|
|
|
protected TReturn InternalToAggregate<TReturn>(Expression select) {
|
|
var map = new ReadAnonymousTypeInfo();
|
|
var field = new StringBuilder();
|
|
var index = 0;
|
|
|
|
_commonExpression.ReadAnonymousField(_tables, field, map, ref index, select, null);
|
|
return this.ToListMapReader<TReturn>((map, field.Length > 0 ? field.Remove(0, 2).ToString() : null)).FirstOrDefault();
|
|
}
|
|
async protected Task<TReturn> InternalToAggregateAsync<TReturn>(Expression select) {
|
|
var map = new ReadAnonymousTypeInfo();
|
|
var field = new StringBuilder();
|
|
var index = 0;
|
|
|
|
_commonExpression.ReadAnonymousField(_tables, field, map, ref index, select, null);
|
|
return (await this.ToListMapReaderAsync<TReturn>((map, field.Length > 0 ? field.Remove(0, 2).ToString() : null))).FirstOrDefault();
|
|
}
|
|
|
|
protected TSelect InternalWhere(Expression exp) => this.Where(_commonExpression.ExpressionWhereLambda(_tables, exp, null));
|
|
|
|
protected TSelect InternalJoin(Expression exp) {
|
|
return this as TSelect;
|
|
}
|
|
#endregion
|
|
}
|
|
} |