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完成 in 查询，完成子表 exists 查询

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28810
2018-12-29 17:22:43 +08:00
parent 90bbff32a5
commit 74a6ab5859
14 changed files with 455 additions and 265 deletions
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88
FreeSql/Internal/CommonExpression.cs
View File

@ -3,6 +3,7 @@ using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
namespace FreeSql.Internal {
@ -223,6 +224,67 @@ namespace FreeSql.Internal {
case "Min": return $"min({ExpressionLambdaToSql(exp3.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
}
}
if (callType.FullName.StartsWith("FreeSql.ISelect`")) { //子表查询
if (exp3.Method.Name == "Any") { //exists
var exp3Stack = new Stack<Expression>();
var exp3tmp = exp3.Object;
while (exp3tmp != null) {
exp3Stack.Push(exp3tmp);
switch (exp3tmp.NodeType) {
case ExpressionType.Call: exp3tmp = (exp3tmp as MethodCallExpression).Object; continue;
case ExpressionType.MemberAccess: exp3tmp = (exp3tmp as MemberExpression).Expression; continue;
}
break;
}
object fsql = null;
List<SelectTableInfo> fsqltables = null;
var fsqltable1SetAlias = false;
Type fsqlType = null;
while (exp3Stack.Any()) {
exp3tmp = exp3Stack.Pop();
if (exp3tmp.Type.FullName.StartsWith("FreeSql.ISelect`") && fsql == null) {
fsql = Expression.Lambda(exp3tmp).Compile().DynamicInvoke();
fsqlType = fsql?.GetType();
if (fsqlType == null) break;
fsqlType.GetField("_limit", BindingFlags.Instance | BindingFlags.NonPublic).SetValue(fsql, 1);
fsqltables = fsqlType.GetField("_tables", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(fsql) as List<SelectTableInfo>;
//fsqltables[0].Alias = $"{_tables[0].Alias}_{fsqltables[0].Alias}";
fsqltables.AddRange(_tables.Select(a => new SelectTableInfo {
Alias = a.Type == SelectTableInfoType.Parent ? a.Alias : $"__parent_{a.Alias}_parent__",
On = "1=1",
Table = a.Table,
Type = SelectTableInfoType.Parent
}));
} else if (fsqlType != null) {
var call3Exp = exp3tmp as MethodCallExpression;
var method = fsqlType.GetMethod(call3Exp.Method.Name, call3Exp.Arguments.Select(a => a.Type).ToArray());
if (call3Exp.Method.ContainsGenericParameters) method.MakeGenericMethod(call3Exp.Method.GetGenericArguments());
var parms = method.GetParameters();
var args = new object[call3Exp.Arguments.Count];
for (var a = 0; a < args.Length; a++) {
var argExp = (call3Exp.Arguments[a] as UnaryExpression)?.Operand;
if (argExp != null && argExp.NodeType == ExpressionType.Lambda) {
if (fsqltable1SetAlias == false) {
fsqltables[0].Alias = (argExp as LambdaExpression).Parameters.First().Name;
fsqltable1SetAlias = true;
}
}
args[a] = argExp;
//if (args[a] == null) ExpressionLambdaToSql(call3Exp.Arguments[a], fsqltables, null, null, SelectTableInfoType.From, true);
}
method.Invoke(fsql, args);
}
}
if (fsql != null) {
var sql = fsqlType.GetMethod("ToSql", new Type[] { typeof(string) })?.Invoke(fsql, new object[] { "1" })?.ToString();
if (string.IsNullOrEmpty(sql) == false) {
foreach (var tb in _tables)
sql = sql.Replace($"__parent_{tb.Alias}_parent__", tb.Alias);
return $"exists({sql})";
}
}
}
}
var other3Exp = ExpressionLambdaToSqlOther(exp3, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
if (string.IsNullOrEmpty(other3Exp) == false) return other3Exp;
throw new Exception($"未现实函数表达式 {exp3} 解析");
@ -287,6 +349,19 @@ namespace FreeSql.Internal {
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 = "";
@ -298,6 +373,7 @@ namespace FreeSql.Internal {
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);
@ -306,10 +382,7 @@ namespace FreeSql.Internal {
if (tb2tmp != null) {
if (exp2.NodeType == ExpressionType.Parameter) alias2 = (exp2 as ParameterExpression).Name;
else alias2 = $"{alias2}__{mp2.Member.Name}";
var find2s = _tables.Where((a2, c2) => a2.Table.CsName == tb2tmp.CsName).ToArray();
if (find2s.Length > 1) find2s = _tables.Where((a2, c2) => a2.Table.CsName == tb2tmp.CsName && a2.Alias == alias2).ToArray();
find2 = find2s.FirstOrDefault();
if (find2 == null) _tables.Add(find2 = new SelectTableInfo { Table = tb2tmp, Alias = alias2, On = null, Type = tbtype });
find2 = getOrAddTable(tb2tmp, alias2);
alias2 = find2.Alias;
tb2 = tb2tmp;
}
@ -318,12 +391,7 @@ namespace FreeSql.Internal {
if (_selectColumnMap != null) {
var tb3 = _common.GetTableByEntity(mp2.Type);
if (tb3 != null) {
var alias3 = $"{alias2}__{mp2.Member.Name}";
var find3s = _tables.Where((a3, c3) => a3.Table.CsName == tb3.CsName).ToArray();
if (find3s.Length > 1) find3s = _tables.Where((a3, c3) => a3.Table.CsName == tb3.CsName && a3.Alias == alias3).ToArray();
var find3 = find3s.FirstOrDefault();
if (find3 == null) _tables.Add(find3 = new SelectTableInfo { Table = tb3, Alias = alias3, On = null, Type = tbtype });
alias3 = find3.Alias;
var find3 = getOrAddTable(tb2tmp, $"{alias2}__{mp2.Member.Name}");
foreach (var tb3c in tb3.Columns.Values)
_selectColumnMap.Add(new SelectColumnInfo { Table = find3, Column = tb3c });

2
FreeSql/Internal/Model/SelectTableInfo.cs
View File

@ -5,5 +5,5 @@
public string On { get; set; }
public SelectTableInfoType Type { get; set; }
}
enum SelectTableInfoType { From, LeftJoin, InnerJoin, RightJoin }
enum SelectTableInfoType { From, LeftJoin, InnerJoin, RightJoin, Parent }
}