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458 lines
27 KiB
C#
458 lines
27 KiB
C#
using FreeSql.Internal.Model;
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using System;
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using System.Collections.Generic;
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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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namespace FreeSql.Internal {
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internal abstract class CommonExpression {
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internal CommonUtils _common;
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internal CommonExpression(CommonUtils common) {
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_common = common;
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}
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internal bool ReadAnonymousField(List<SelectTableInfo> _tables, StringBuilder field, ReadAnonymousTypeInfo parent, ref int index, Expression exp, Func<Expression[], string> getSelectGroupingMapString) {
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switch (exp.NodeType) {
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case ExpressionType.Quote: return ReadAnonymousField(_tables, field, parent, ref index, (exp as UnaryExpression)?.Operand, getSelectGroupingMapString);
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case ExpressionType.Lambda: return ReadAnonymousField(_tables, field, parent, ref index, (exp as LambdaExpression)?.Body, getSelectGroupingMapString);
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case ExpressionType.Negate:
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case ExpressionType.NegateChecked:
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parent.DbField = $"-({ExpressionLambdaToSql(exp, _tables, null, getSelectGroupingMapString, SelectTableInfoType.From, true)})";
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field.Append(", ").Append(parent.DbField);
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if (index >= 0) field.Append(" as").Append(++index);
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return false;
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case ExpressionType.Convert: return ReadAnonymousField(_tables, field, parent, ref index, (exp as UnaryExpression)?.Operand, getSelectGroupingMapString);
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case ExpressionType.Constant:
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var constExp = exp as ConstantExpression;
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//处理自定义SQL语句，如： ToList(new {
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// ccc = "now()",
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// partby = "sum(num) over(PARTITION BY server_id,os,rid,chn order by id desc)"
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//})，有缺点即 ccc partby 接受类型都是 string，可配合 Convert.ToXxx 类型转换，请看下面的兼容
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parent.DbField = constExp.Type.FullName == "System.String" ? (constExp.Value?.ToString() ?? "NULL") : _common.FormatSql("{0}", constExp?.Value);
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field.Append(", ").Append(parent.DbField);
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if (index >= 0) field.Append(" as").Append(++index);
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return false;
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case ExpressionType.Call:
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var callExp = exp as MethodCallExpression;
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//处理自定义SQL语句，如： ToList(new {
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// ccc = Convert.ToDateTime("now()"),
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// partby = Convert.ToDecimal("sum(num) over(PARTITION BY server_id,os,rid,chn order by id desc)")
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//})
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if (callExp.Method?.DeclaringType.FullName == "System.Convert" &&
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callExp.Method.Name.StartsWith("To") &&
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callExp.Arguments[0].NodeType == ExpressionType.Constant &&
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callExp.Arguments[0].Type.FullName == "System.String")
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parent.DbField = (callExp.Arguments[0] as ConstantExpression).Value?.ToString() ?? "NULL";
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else
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parent.DbField = ExpressionLambdaToSql(exp, _tables, null, getSelectGroupingMapString, SelectTableInfoType.From, true);
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field.Append(", ").Append(parent.DbField);
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if (index >= 0) field.Append(" as").Append(++index);
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return false;
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case ExpressionType.MemberAccess:
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if (_common.GetTableByEntity(exp.Type) != null) { //加载表所有字段
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var map = new List<SelectColumnInfo>();
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ExpressionSelectColumn_MemberAccess(_tables, map, SelectTableInfoType.From, exp, true, getSelectGroupingMapString);
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parent.Consturctor = map.First().Table.Table.Type.GetConstructor(new Type[0]);
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parent.ConsturctorType = ReadAnonymousTypeInfoConsturctorType.Properties;
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for (var idx = 0; idx < map.Count; idx++) {
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var child = new ReadAnonymousTypeInfo {
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Property = map.First().Table.Table.Type.GetProperty(map[idx].Column.CsName, BindingFlags.Public | BindingFlags.IgnoreCase | BindingFlags.Instance),
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CsName = map[idx].Column.CsName, DbField = $"{map[idx].Table.Alias}.{_common.QuoteSqlName(map[idx].Column.Attribute.Name)}" };
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field.Append(", ").Append(_common.QuoteReadColumn(map[idx].Column.CsType, child.DbField));
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if (index >= 0) field.Append(" as").Append(++index);
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parent.Childs.Add(child);
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}
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} else {
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parent.DbField = ExpressionLambdaToSql(exp, _tables, null, getSelectGroupingMapString, SelectTableInfoType.From, true);
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field.Append(", ").Append(parent.DbField);
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if (index >= 0) field.Append(" as").Append(++index);
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return false;
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}
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return false;
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case ExpressionType.New:
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var newExp = exp as NewExpression;
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parent.Consturctor = newExp.Type.GetConstructors()[0];
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parent.ConsturctorType = ReadAnonymousTypeInfoConsturctorType.Arguments;
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for (var a = 0; a < newExp.Members.Count; a++) {
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var child = new ReadAnonymousTypeInfo {
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Property = newExp.Type.GetProperty(newExp.Members[a].Name, BindingFlags.Public | BindingFlags.IgnoreCase | BindingFlags.Instance),
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CsName = newExp.Members[a].Name, CsType = newExp.Arguments[a].Type };
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parent.Childs.Add(child);
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ReadAnonymousField(_tables, field, child, ref index, newExp.Arguments[a], getSelectGroupingMapString);
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}
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return true;
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}
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parent.DbField = $"({ExpressionLambdaToSql(exp, _tables, null, getSelectGroupingMapString, SelectTableInfoType.From, true)})";
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field.Append(", ").Append(parent.DbField);
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if (index >= 0) field.Append(" as").Append(++index);
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return false;
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}
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internal object ReadAnonymous(ReadAnonymousTypeInfo parent, DbDataReader dr, ref int index) {
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if (parent.Childs.Any() == false) return dr.GetValue(++index);
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switch (parent.ConsturctorType) {
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case ReadAnonymousTypeInfoConsturctorType.Arguments:
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var args = new object[parent.Childs.Count];
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for (var a = 0; a < parent.Childs.Count; a++) {
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args[a] = Utils.GetDataReaderValue(parent.Childs[a].CsType, ReadAnonymous(parent.Childs[a], dr, ref index));
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}
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return parent.Consturctor.Invoke(args);
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case ReadAnonymousTypeInfoConsturctorType.Properties:
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var ret = parent.Consturctor.Invoke(null);
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for (var b = 0; b < parent.Childs.Count; b++) {
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var prop = parent.Childs[b].Property;
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prop.SetValue(ret, Utils.GetDataReaderValue(prop.PropertyType, ReadAnonymous(parent.Childs[b], dr, ref index)), null);
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}
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return ret;
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}
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return null;
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}
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internal string ExpressionConstant(ConstantExpression exp) => _common.FormatSql("{0}", exp?.Value);
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internal string ExpressionSelectColumn_MemberAccess(List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, Expression exp, bool isQuoteName, Func<Expression[], string> getSelectGroupingMapString) {
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return ExpressionLambdaToSql(exp, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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}
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internal string[] ExpressionSelectColumns_MemberAccess_New_NewArrayInit(List<SelectTableInfo> _tables, Expression exp, bool isQuoteName, Func<Expression[], string> getSelectGroupingMapString) {
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switch (exp?.NodeType) {
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case ExpressionType.Quote: return ExpressionSelectColumns_MemberAccess_New_NewArrayInit(_tables, (exp as UnaryExpression)?.Operand, isQuoteName, getSelectGroupingMapString);
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case ExpressionType.Lambda: return ExpressionSelectColumns_MemberAccess_New_NewArrayInit(_tables, (exp as LambdaExpression)?.Body, isQuoteName, getSelectGroupingMapString);
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case ExpressionType.Convert: return ExpressionSelectColumns_MemberAccess_New_NewArrayInit(_tables, (exp as UnaryExpression)?.Operand, isQuoteName, getSelectGroupingMapString);
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case ExpressionType.Constant: return new[] { ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, isQuoteName, getSelectGroupingMapString) };
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case ExpressionType.MemberAccess: return new[] { ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, exp, isQuoteName, getSelectGroupingMapString) };
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case ExpressionType.New:
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var newExp = exp as NewExpression;
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if (newExp == null) break;
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var newExpMembers = new string[newExp.Members.Count];
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for (var a = 0; a < newExpMembers.Length; a++) newExpMembers[a] = ExpressionSelectColumn_MemberAccess(_tables, null, SelectTableInfoType.From, newExp.Arguments[a], isQuoteName, getSelectGroupingMapString);
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return newExpMembers;
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case ExpressionType.NewArrayInit:
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var newArr = exp as NewArrayExpression;
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if (newArr == null) break;
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var newArrMembers = new List<string>();
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foreach (var newArrExp in newArr.Expressions) newArrMembers.AddRange(ExpressionSelectColumns_MemberAccess_New_NewArrayInit(_tables, newArrExp, isQuoteName, getSelectGroupingMapString));
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return newArrMembers.ToArray();
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}
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return new string[0];
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}
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static readonly Dictionary<ExpressionType, string> dicExpressionOperator = new Dictionary<ExpressionType, string>() {
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{ ExpressionType.OrElse, "OR" },
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{ ExpressionType.Or, "|" },
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{ ExpressionType.AndAlso, "AND" },
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{ ExpressionType.And, "&" },
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{ ExpressionType.GreaterThan, ">" },
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{ ExpressionType.GreaterThanOrEqual, ">=" },
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{ ExpressionType.LessThan, "<" },
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{ ExpressionType.LessThanOrEqual, "<=" },
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{ ExpressionType.NotEqual, "<>" },
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{ ExpressionType.Add, "+" },
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{ ExpressionType.Subtract, "-" },
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{ ExpressionType.Multiply, "*" },
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{ ExpressionType.Divide, "/" },
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{ ExpressionType.Modulo, "%" },
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{ ExpressionType.Equal, "=" },
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};
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internal string ExpressionWhereLambdaNoneForeignObject(List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Expression exp, Func<Expression[], string> getSelectGroupingMapString) {
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var sql = ExpressionLambdaToSql(exp, _tables, _selectColumnMap, getSelectGroupingMapString, SelectTableInfoType.From, true);
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switch(sql) {
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case "1":
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case "'t'": return "1=1";
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case "0":
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case "'f'": return "1=2";
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default:return sql;
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}
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}
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internal string ExpressionWhereLambda(List<SelectTableInfo> _tables, Expression exp, Func<Expression[], string> getSelectGroupingMapString) {
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var sql = ExpressionLambdaToSql(exp, _tables, null, getSelectGroupingMapString, SelectTableInfoType.From, true);
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switch (sql) {
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case "1":
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case "'t'": return "1=1";
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case "0":
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case "'f'": return "1=2";
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default: return sql;
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}
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}
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internal void ExpressionJoinLambda(List<SelectTableInfo> _tables, SelectTableInfoType tbtype, Expression exp, Func<Expression[], string> getSelectGroupingMapString) {
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var tbidx = _tables.Count;
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var filter = ExpressionLambdaToSql(exp, _tables, null, getSelectGroupingMapString, tbtype, true);
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switch (filter) {
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case "1":
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case "'t'": filter = "1=1"; break;
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case "0":
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case "'f'": filter = "1=2"; break;
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default: break;
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}
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if (_tables.Count > tbidx) {
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_tables[tbidx].Type = tbtype;
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_tables[tbidx].On = filter;
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for (var a = tbidx + 1; a < _tables.Count; a++)
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_tables[a].Type = SelectTableInfoType.From;
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} else {
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var find = _tables.Where((a, c) => c > 0 && a.Type == tbtype && string.IsNullOrEmpty(a.On)).LastOrDefault();
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if (find != null) find.On = filter;
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}
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}
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internal string ExpressionLambdaToSql(Expression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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switch (exp.NodeType) {
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case ExpressionType.Not: return $"not({ExpressionLambdaToSql((exp as UnaryExpression)?.Operand, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case ExpressionType.Quote: return ExpressionLambdaToSql((exp as UnaryExpression)?.Operand, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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case ExpressionType.Lambda: return ExpressionLambdaToSql((exp as LambdaExpression)?.Body, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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case ExpressionType.Convert: return ExpressionLambdaToSql((exp as UnaryExpression)?.Operand, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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case ExpressionType.Negate:
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case ExpressionType.NegateChecked: return "-" + ExpressionLambdaToSql((exp as UnaryExpression)?.Operand, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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case ExpressionType.Constant: return _common.FormatSql("{0}", (exp as ConstantExpression)?.Value);
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case ExpressionType.Conditional:
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var condExp = exp as ConditionalExpression;
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return $"case when {ExpressionLambdaToSql(condExp.Test, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} then {ExpressionLambdaToSql(condExp.IfTrue, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} else {ExpressionLambdaToSql(condExp.IfFalse, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} end";
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case ExpressionType.Call:
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var exp3 = exp as MethodCallExpression;
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var callType = exp3.Object?.Type ?? exp3.Method.DeclaringType;
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switch (callType.FullName) {
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case "System.String": return ExpressionLambdaToSqlCallString(exp3, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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case "System.Math": return ExpressionLambdaToSqlCallMath(exp3, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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case "System.DateTime": return ExpressionLambdaToSqlCallDateTime(exp3, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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case "System.TimeSpan": return ExpressionLambdaToSqlCallTimeSpan(exp3, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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case "System.Convert": return ExpressionLambdaToSqlCallConvert(exp3, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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}
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if (callType.FullName.StartsWith("FreeSql.ISelectGroupingAggregate`")) {
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switch (exp3.Method.Name) {
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case "Count": return "count(1)";
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case "Sum": return $"sum({ExpressionLambdaToSql(exp3.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Avg": return $"avg({ExpressionLambdaToSql(exp3.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Max": return $"max({ExpressionLambdaToSql(exp3.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Min": return $"min({ExpressionLambdaToSql(exp3.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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}
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}
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if (callType.FullName.StartsWith("FreeSql.ISelect`")) { //子表查询
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if (exp3.Method.Name == "Any") { //exists
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var exp3Stack = new Stack<Expression>();
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var exp3tmp = exp3.Object;
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while (exp3tmp != null) {
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exp3Stack.Push(exp3tmp);
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switch (exp3tmp.NodeType) {
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case ExpressionType.Call: exp3tmp = (exp3tmp as MethodCallExpression).Object; continue;
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case ExpressionType.MemberAccess: exp3tmp = (exp3tmp as MemberExpression).Expression; continue;
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}
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break;
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}
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object fsql = null;
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List<SelectTableInfo> fsqltables = null;
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var fsqltable1SetAlias = false;
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Type fsqlType = null;
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while (exp3Stack.Any()) {
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exp3tmp = exp3Stack.Pop();
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if (exp3tmp.Type.FullName.StartsWith("FreeSql.ISelect`") && fsql == null) {
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fsql = Expression.Lambda(exp3tmp).Compile().DynamicInvoke();
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fsqlType = fsql?.GetType();
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if (fsqlType == null) break;
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fsqlType.GetField("_limit", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(fsql, 1);
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fsqltables = fsqlType.GetField("_tables", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(fsql) as List<SelectTableInfo>;
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//fsqltables[0].Alias = $"{_tables[0].Alias}_{fsqltables[0].Alias}";
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fsqltables.AddRange(_tables.Select(a => new SelectTableInfo {
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Alias = a.Type == SelectTableInfoType.Parent ? a.Alias : $"__parent_{a.Alias}_parent__",
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On = "1=1",
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Table = a.Table,
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Type = SelectTableInfoType.Parent
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}));
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} else if (fsqlType != null) {
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var call3Exp = exp3tmp as MethodCallExpression;
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var method = fsqlType.GetMethod(call3Exp.Method.Name, call3Exp.Arguments.Select(a => a.Type).ToArray());
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if (call3Exp.Method.ContainsGenericParameters) method.MakeGenericMethod(call3Exp.Method.GetGenericArguments());
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var parms = method.GetParameters();
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var args = new object[call3Exp.Arguments.Count];
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for (var a = 0; a < args.Length; a++) {
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var argExp = (call3Exp.Arguments[a] as UnaryExpression)?.Operand;
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if (argExp != null && argExp.NodeType == ExpressionType.Lambda) {
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if (fsqltable1SetAlias == false) {
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fsqltables[0].Alias = (argExp as LambdaExpression).Parameters.First().Name;
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fsqltable1SetAlias = true;
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}
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}
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args[a] = argExp;
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//if (args[a] == null) ExpressionLambdaToSql(call3Exp.Arguments[a], fsqltables, null, null, SelectTableInfoType.From, true);
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}
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method.Invoke(fsql, args);
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}
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}
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if (fsql != null) {
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var sql = fsqlType.GetMethod("ToSql", new Type[] { typeof(string) })?.Invoke(fsql, new object[] { "1" })?.ToString();
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if (string.IsNullOrEmpty(sql) == false) {
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foreach (var tb in _tables)
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sql = sql.Replace($"__parent_{tb.Alias}_parent__", tb.Alias);
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return $"exists({sql})";
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}
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}
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}
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}
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var other3Exp = ExpressionLambdaToSqlOther(exp3, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (string.IsNullOrEmpty(other3Exp) == false) return other3Exp;
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throw new Exception($"未现实函数表达式 {exp3} 解析");
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case ExpressionType.MemberAccess:
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var exp4 = exp as MemberExpression;
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if (exp4.Expression != null && exp4.Expression.Type.IsArray == false && exp4.Expression.Type.FullName.StartsWith("System.Nullable`1[")) return ExpressionLambdaToSql(exp4.Expression, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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var extRet = "";
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var memberType = exp4.Expression?.Type ?? exp4.Type;
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switch (memberType.FullName) {
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case "System.String": extRet = ExpressionLambdaToSqlMemberAccessString(exp4, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName); break;
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case "System.DateTime": extRet = ExpressionLambdaToSqlMemberAccessDateTime(exp4, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName); break;
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case "System.TimeSpan": extRet = ExpressionLambdaToSqlMemberAccessTimeSpan(exp4, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName); break;
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}
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if (string.IsNullOrEmpty(extRet) == false) return extRet;
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var other4Exp = ExpressionLambdaToSqlOther(exp4, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (string.IsNullOrEmpty(other4Exp) == false) return other4Exp;
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var expStack = new Stack<Expression>();
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expStack.Push(exp);
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MethodCallExpression callExp = null;
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var exp2 = exp4.Expression;
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while (true) {
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switch(exp2.NodeType) {
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case ExpressionType.Constant:
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expStack.Push(exp2);
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break;
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case ExpressionType.Parameter:
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expStack.Push(exp2);
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break;
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case ExpressionType.MemberAccess:
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expStack.Push(exp2);
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exp2 = (exp2 as MemberExpression).Expression;
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if (exp2 == null) break;
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continue;
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case ExpressionType.Call:
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callExp = exp2 as MethodCallExpression;
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expStack.Push(exp2);
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exp2 = callExp.Object;
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if (exp2 == null) break;
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continue;
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}
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break;
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}
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if (expStack.First().NodeType != ExpressionType.Parameter) return _common.FormatSql("{0}", Expression.Lambda(exp).Compile().DynamicInvoke());
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if (callExp != null) return ExpressionLambdaToSql(callExp, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (getSelectGroupingMapString != null && expStack.First().Type.FullName.StartsWith("FreeSql.ISelectGroupingAggregate`")) {
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if (getSelectGroupingMapString != null) {
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var expText = getSelectGroupingMapString(expStack.Where((a, b) => b >= 2).ToArray());
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if (string.IsNullOrEmpty(expText) == false) return expText;
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}
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}
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if (_tables == null) {
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var pp = expStack.Pop() as ParameterExpression;
|
||
var memberExp = expStack.Pop() as MemberExpression;
|
||
var tb = _common.GetTableByEntity(pp.Type);
|
||
if (tb.ColumnsByCs.ContainsKey(memberExp.Member.Name) == false) throw new ArgumentException($"{tb.DbName} 找不到列 {memberExp.Member.Name}");
|
||
if (_selectColumnMap != null) {
|
||
_selectColumnMap.Add(new SelectColumnInfo { Table = null, Column = tb.ColumnsByCs[memberExp.Member.Name] });
|
||
}
|
||
var name = tb.ColumnsByCs[memberExp.Member.Name].Attribute.Name;
|
||
if (isQuoteName) name = _common.QuoteSqlName(name);
|
||
return name;
|
||
}
|
||
Func<TableInfo, string, SelectTableInfo> getOrAddTable = (tbtmp, alias) => {
|
||
var finds = _tables.Where((a2, c2) => a2.Table.CsName == tbtmp.CsName).ToArray(); //外部表，内部表一起查
|
||
if (finds.Length > 1) {
|
||
finds = _tables.Where((a2, c2) => a2.Table.CsName == tbtmp.CsName && a2.Type == SelectTableInfoType.Parent && a2.Alias == $"__parent_{alias}_parent__").ToArray(); //查询外部表
|
||
if (finds.Any() == false) {
|
||
finds = _tables.Where((a2, c2) => a2.Table.CsName == tbtmp.CsName && a2.Type != SelectTableInfoType.Parent).ToArray(); //查询内部表
|
||
if (finds.Length > 1) finds = _tables.Where((a2, c2) => a2.Table.CsName == tbtmp.CsName && a2.Type != SelectTableInfoType.Parent && a2.Alias == alias).ToArray();
|
||
}
|
||
}
|
||
var find = finds.FirstOrDefault();
|
||
if (find == null) _tables.Add(find = new SelectTableInfo { Table = tbtmp, Alias = alias, On = null, Type = tbtype });
|
||
return find;
|
||
};
|
||
|
||
TableInfo tb2 = null;
|
||
string alias2 = "", name2 = "";
|
||
SelectTableInfo find2 = null;
|
||
while (expStack.Count > 0) {
|
||
exp2 = expStack.Pop();
|
||
switch (exp2.NodeType) {
|
||
case ExpressionType.Constant:
|
||
throw new NotImplementedException("未现实 MemberAccess 下的 Constant");
|
||
case ExpressionType.Parameter:
|
||
case ExpressionType.MemberAccess:
|
||
|
||
var exp2Type = exp2.Type;
|
||
if (exp2Type.FullName.StartsWith("FreeSql.ISelectGroupingAggregate`")) exp2Type = exp2Type.GenericTypeArguments.FirstOrDefault() ?? exp2.Type;
|
||
var tb2tmp = _common.GetTableByEntity(exp2Type);
|
||
var mp2 = exp2 as MemberExpression;
|
||
if (mp2?.Member.Name == "Key" && mp2.Expression.Type.FullName.StartsWith("FreeSql.ISelectGroupingAggregate`")) continue;
|
||
if (tb2tmp != null) {
|
||
if (exp2.NodeType == ExpressionType.Parameter) alias2 = (exp2 as ParameterExpression).Name;
|
||
else alias2 = $"{alias2}__{mp2.Member.Name}";
|
||
find2 = getOrAddTable(tb2tmp, alias2);
|
||
alias2 = find2.Alias;
|
||
tb2 = tb2tmp;
|
||
}
|
||
if (mp2 == null || expStack.Any()) continue;
|
||
if (tb2.ColumnsByCs.ContainsKey(mp2.Member.Name) == false) { //如果选的是对象，附加所有列
|
||
if (_selectColumnMap != null) {
|
||
var tb3 = _common.GetTableByEntity(mp2.Type);
|
||
if (tb3 != null) {
|
||
var find3 = getOrAddTable(tb2tmp, $"{alias2}__{mp2.Member.Name}");
|
||
|
||
foreach (var tb3c in tb3.Columns.Values)
|
||
_selectColumnMap.Add(new SelectColumnInfo { Table = find3, Column = tb3c });
|
||
if (tb3.Columns.Any()) return "";
|
||
}
|
||
}
|
||
throw new ArgumentException($"{tb2.DbName} 找不到列 {mp2.Member.Name}");
|
||
}
|
||
var col2 = tb2.ColumnsByCs[mp2.Member.Name];
|
||
if (_selectColumnMap != null && find2 != null) {
|
||
_selectColumnMap.Add(new SelectColumnInfo { Table = find2, Column = col2 });
|
||
return "";
|
||
}
|
||
name2 = tb2.ColumnsByCs[mp2.Member.Name].Attribute.Name;
|
||
break;
|
||
case ExpressionType.Call:break;
|
||
}
|
||
}
|
||
if (isQuoteName) name2 = _common.QuoteSqlName(name2);
|
||
return $"{alias2}.{name2}";
|
||
}
|
||
var expBinary = exp as BinaryExpression;
|
||
if (expBinary == null) {
|
||
var other99Exp = ExpressionLambdaToSqlOther(exp, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
|
||
if (string.IsNullOrEmpty(other99Exp) == false) return other99Exp;
|
||
return "";
|
||
}
|
||
if (expBinary.NodeType == ExpressionType.Coalesce) {
|
||
return _common.IsNull(
|
||
ExpressionLambdaToSql(expBinary.Left, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName),
|
||
ExpressionLambdaToSql(expBinary.Right, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName));
|
||
}
|
||
if (dicExpressionOperator.TryGetValue(expBinary.NodeType, out var tryoper) == false) return "";
|
||
var left = ExpressionLambdaToSql(expBinary.Left, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
|
||
var right = ExpressionLambdaToSql(expBinary.Right, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
|
||
if (left == "NULL") {
|
||
var tmp = right;
|
||
right = left;
|
||
left = tmp;
|
||
}
|
||
if (right == "NULL") tryoper = tryoper == "=" ? " IS " : " IS NOT ";
|
||
if (tryoper == "+" && (expBinary.Left.Type.FullName == "System.String" || expBinary.Right.Type.FullName == "System.String")) return _common.StringConcat(left, right, expBinary.Left.Type, expBinary.Right.Type);
|
||
if (tryoper == "%") return _common.Mod(left, right, expBinary.Left.Type, expBinary.Right.Type);
|
||
return $"{left} {tryoper} {right}";
|
||
}
|
||
|
||
internal abstract string ExpressionLambdaToSqlMemberAccessString(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName);
|
||
internal abstract string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName);
|
||
internal abstract string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName);
|
||
internal abstract string ExpressionLambdaToSqlCallString(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName);
|
||
internal abstract string ExpressionLambdaToSqlCallMath(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName);
|
||
internal abstract string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName);
|
||
internal abstract string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName);
|
||
internal abstract string ExpressionLambdaToSqlCallConvert(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName);
|
||
internal abstract string ExpressionLambdaToSqlOther(Expression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName);
|
||
}
|
||
}
|