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- 修复 Ado.Query 查询字段重复时报错；#162 #165 #161 - 增加 FreeSql.Provider.MsAccess 支持 Access 数据库操作，已通过 2003/2007 版本测试；
This commit is contained in:
28810
398
Providers/FreeSql.Provider.MsAccess/MsAccessExpression.cs
Normal file
398
Providers/FreeSql.Provider.MsAccess/MsAccessExpression.cs
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using FreeSql.Internal;
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using FreeSql.Internal.Model;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Text;
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namespace FreeSql.MsAccess
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{
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class MsAccessExpression : CommonExpression
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{
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public MsAccessExpression(CommonUtils common) : base(common) { }
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public override string ExpressionLambdaToSqlOther(Expression exp, ExpTSC tsc)
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{
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
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switch (exp.NodeType)
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{
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case ExpressionType.Convert:
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var operandExp = (exp as UnaryExpression)?.Operand;
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var gentype = exp.Type.NullableTypeOrThis();
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if (gentype != operandExp.Type.NullableTypeOrThis())
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{
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var retBefore = getExp(operandExp);
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var retAfter = MsAccessUtils.GetCastSql(retBefore, gentype);
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if (retBefore != retAfter) return retAfter;
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}
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break;
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case ExpressionType.Call:
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var callExp = exp as MethodCallExpression;
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switch (callExp.Method.Name)
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{
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case "Parse":
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case "TryParse":
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var retBefore = getExp(callExp.Arguments[0]);
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var retAfter = MsAccessUtils.GetCastSql(retBefore, callExp.Method.DeclaringType.NullableTypeOrThis());
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if (retBefore != retAfter) return retAfter;
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return null;
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case "NewGuid":
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switch (callExp.Method.DeclaringType.NullableTypeOrThis().ToString())
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{
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case "System.Guid": return $"newid()";
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}
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return null;
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case "Next":
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if (callExp.Object?.Type == typeof(Random)) return "rnd*1000000000000000";
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return null;
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case "NextDouble":
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if (callExp.Object?.Type == typeof(Random)) return "rnd";
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return null;
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case "Random":
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if (callExp.Method.DeclaringType.IsNumberType()) return "rnd";
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return null;
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case "ToString":
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if (callExp.Object != null) return callExp.Arguments.Count == 0 ? MsAccessUtils.GetCastSql(getExp(callExp.Object), typeof(string)) : null;
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return null;
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}
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var objExp = callExp.Object;
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var objType = objExp?.Type;
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if (objType?.FullName == "System.Byte[]") return null;
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var argIndex = 0;
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if (objType == null && callExp.Method.DeclaringType == typeof(Enumerable))
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{
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objExp = callExp.Arguments.FirstOrDefault();
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objType = objExp?.Type;
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argIndex++;
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}
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if (objType == null) objType = callExp.Method.DeclaringType;
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if (objType != null || objType.IsArrayOrList())
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{
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tsc.SetMapColumnTmp(null);
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var args1 = getExp(callExp.Arguments[argIndex]);
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var oldMapType = tsc.SetMapTypeReturnOld(tsc.mapTypeTmp);
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var oldDbParams = tsc.SetDbParamsReturnOld(null);
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var left = objExp == null ? null : getExp(objExp);
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tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
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tsc.SetDbParamsReturnOld(oldDbParams);
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switch (callExp.Method.Name)
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{
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case "Contains":
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//判断 in //在各大 Provider AdoProvider 中已约定，500元素分割, 3空格\r\n4空格
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return $"(({args1}) in {left.Replace(", \r\n \r\n", $") \r\n OR ({args1}) in (")})";
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}
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}
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break;
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case ExpressionType.NewArrayInit:
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var arrExp = exp as NewArrayExpression;
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var arrSb = new StringBuilder();
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arrSb.Append("(");
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for (var a = 0; a < arrExp.Expressions.Count; a++)
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{
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if (a > 0) arrSb.Append(",");
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arrSb.Append(getExp(arrExp.Expressions[a]));
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}
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if (arrSb.Length == 1) arrSb.Append("NULL");
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return arrSb.Append(")").ToString();
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case ExpressionType.ListInit:
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var listExp = exp as ListInitExpression;
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var listSb = new StringBuilder();
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listSb.Append("(");
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for (var a = 0; a < listExp.Initializers.Count; a++)
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{
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if (listExp.Initializers[a].Arguments.Any() == false) continue;
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if (a > 0) listSb.Append(",");
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listSb.Append(getExp(listExp.Initializers[a].Arguments.FirstOrDefault()));
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}
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if (listSb.Length == 1) listSb.Append("NULL");
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return listSb.Append(")").ToString();
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case ExpressionType.New:
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var newExp = exp as NewExpression;
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if (typeof(IList).IsAssignableFrom(newExp.Type))
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{
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if (newExp.Arguments.Count == 0) return "(NULL)";
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if (typeof(IEnumerable).IsAssignableFrom(newExp.Arguments[0].Type) == false) return "(NULL)";
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return getExp(newExp.Arguments[0]);
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}
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return null;
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}
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return null;
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}
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public override string ExpressionLambdaToSqlMemberAccessString(MemberExpression exp, ExpTSC tsc)
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{
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if (exp.Expression == null)
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{
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switch (exp.Member.Name)
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{
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case "Empty": return "''";
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}
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return null;
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}
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var left = ExpressionLambdaToSql(exp.Expression, tsc);
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switch (exp.Member.Name)
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{
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case "Length": return $"len({left})";
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}
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return null;
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}
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public override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, ExpTSC tsc)
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{
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if (exp.Expression == null)
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{
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switch (exp.Member.Name)
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{
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case "Now": return _common.Now;
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case "UtcNow": return _common.NowUtc;
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case "Today": return "date";
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case "MinValue": return "'1753/1/1 0:00:00'";
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case "MaxValue": return "'9999/12/31 23:59:59'";
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}
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return null;
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}
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var left = ExpressionLambdaToSql(exp.Expression, tsc);
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switch (exp.Member.Name)
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{
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case "Date": return $"format({left},'yyyy-mm-dd')";
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case "TimeOfDay": return $"datediff('s', format({left},'yyyy-mm-dd'), {left})";
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case "DayOfWeek": return $"(format({left},'w')-1)";
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case "Day": return $"day({left})";
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case "DayOfYear": return $"format({left},'y')";
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case "Month": return $"month({left})";
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case "Year": return $"year({left})";
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case "Hour": return $"hour({left})";
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case "Minute": return $"minute({left})";
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case "Second": return $"second({left})";
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case "Millisecond": return $"(second({left})/1000)";
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case "Ticks": return $"({MsAccessUtils.GetCastSql($"datediff('s', '1970-1-1', {left})", typeof(long))}*10000000+621355968000000000)";
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}
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return null;
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}
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public override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, ExpTSC tsc)
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{
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if (exp.Expression == null)
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{
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switch (exp.Member.Name)
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{
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case "Zero": return "0";
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case "MinValue": return "-922337203685477580"; //微秒 Ticks / 10
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case "MaxValue": return "922337203685477580";
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}
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return null;
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}
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var left = ExpressionLambdaToSql(exp.Expression, tsc);
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switch (exp.Member.Name)
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{
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case "Days": return $"clng(({left})/{60 * 60 * 24}+1)";
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case "Hours": return $"clng(({left})/{60 * 60} mod 24+1)";
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case "Milliseconds": return $"({MsAccessUtils.GetCastSql(left, typeof(long))}*1000)";
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case "Minutes": return $"clng(({left})/60 mod 60+1)";
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case "Seconds": return $"(({left}) mod 60)";
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case "Ticks": return $"({MsAccessUtils.GetCastSql(left, typeof(long))}*10000000)";
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case "TotalDays": return $"(({left})/{60 * 60 * 24})";
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case "TotalHours": return $"(({left})/{60 * 60})";
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case "TotalMilliseconds": return $"({MsAccessUtils.GetCastSql(left, typeof(long))}*1000)";
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case "TotalMinutes": return $"(({left})/60)";
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case "TotalSeconds": return $"({left})";
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}
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return null;
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}
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public override string ExpressionLambdaToSqlCallString(MethodCallExpression exp, ExpTSC tsc)
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{
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
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if (exp.Object == null)
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{
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switch (exp.Method.Name)
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{
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case "IsNullOrEmpty":
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var arg1 = getExp(exp.Arguments[0]);
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return $"({arg1} is null or {arg1} = '')";
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case "IsNullOrWhiteSpace":
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var arg2 = getExp(exp.Arguments[0]);
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return $"({arg2} is null or {arg2} = '' or ltrim({arg2}) = '')";
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case "Concat":
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return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), exp.Arguments.Select(a => a.Type).ToArray());
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}
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}
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else
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{
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var left = getExp(exp.Object);
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switch (exp.Method.Name)
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{
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case "StartsWith":
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case "EndsWith":
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case "Contains":
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var args0Value = getExp(exp.Arguments[0]);
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if (args0Value == "NULL") return $"({left}) IS NULL";
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if (exp.Method.Name == "StartsWith") return $"({left}) LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"({args0Value}+'%')")}";
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if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%'+{args0Value})")}";
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if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
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return $"({left}) LIKE ('%'+{args0Value}+'%')";
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case "ToLower": return $"lcase({left})";
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case "ToUpper": return $"ucase({left})";
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case "Substring":
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var substrArgs1 = getExp(exp.Arguments[0]);
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if (long.TryParse(substrArgs1, out var testtrylng1)) substrArgs1 = (testtrylng1 + 1).ToString();
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else substrArgs1 += "+1";
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if (exp.Arguments.Count == 1) return $"left({left}, {substrArgs1})";
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return $"mid({left}, {substrArgs1}, {getExp(exp.Arguments[1])})";
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case "IndexOf":
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var indexOfFindStr = getExp(exp.Arguments[0]);
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if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32")
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{
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var locateArgs1 = getExp(exp.Arguments[1]);
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if (long.TryParse(locateArgs1, out var testtrylng2)) locateArgs1 = (testtrylng2 + 1).ToString();
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else locateArgs1 += "+1";
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return $"(instr({locateArgs1}, {left}, {indexOfFindStr})-1)";
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}
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return $"(instr({left}, {indexOfFindStr})-1)";
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case "PadLeft":
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if (exp.Arguments.Count == 1) return $"lpad({left}, {getExp(exp.Arguments[0])})";
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return $"lpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "PadRight":
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if (exp.Arguments.Count == 1) return $"rpad({left}, {getExp(exp.Arguments[0])})";
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return $"rpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "Trim": return $"ltrim(rtrim({left}))";
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case "TrimStart": return $"ltrim({left})";
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case "TrimEnd": return $"rtrim({left})";
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case "Replace": return $"replace({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "CompareTo": return $"strcomp({left}, {getExp(exp.Arguments[0])})";
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case "Equals": return $"({left} = {getExp(exp.Arguments[0])})";
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}
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}
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return null;
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}
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public override string ExpressionLambdaToSqlCallMath(MethodCallExpression exp, ExpTSC tsc)
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{
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
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switch (exp.Method.Name)
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{
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case "Abs": return $"abs({getExp(exp.Arguments[0])})";
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case "Sign": return $"sign({getExp(exp.Arguments[0])})";
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case "Floor": return $"clng({getExp(exp.Arguments[0])}+1)";
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case "Ceiling": return $"clng({getExp(exp.Arguments[0])})";
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case "Round":
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if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") return $"round({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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return $"round({getExp(exp.Arguments[0])}, 0)";
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case "Exp": return $"exp({getExp(exp.Arguments[0])})";
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case "Log": return $"log({getExp(exp.Arguments[0])})";
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case "Log10": return $"log10({getExp(exp.Arguments[0])})";
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case "Pow": return $"pow({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "Sqrt": return $"sqr({getExp(exp.Arguments[0])})";
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case "Cos": return $"cos({getExp(exp.Arguments[0])})";
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case "Sin": return $"sin({getExp(exp.Arguments[0])})";
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case "Tan": return $"tan({getExp(exp.Arguments[0])})";
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case "Acos": return $"acos({getExp(exp.Arguments[0])})";
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case "Asin": return $"asin({getExp(exp.Arguments[0])})";
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case "Atan": return $"atan({getExp(exp.Arguments[0])})";
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case "Atan2": return $"atan2({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "Truncate": return $"floor({getExp(exp.Arguments[0])})";
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}
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return null;
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}
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public override string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, ExpTSC tsc)
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{
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
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if (exp.Object == null)
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{
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switch (exp.Method.Name)
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{
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case "Compare": return $"({getExp(exp.Arguments[0])} - ({getExp(exp.Arguments[1])}))";
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case "DaysInMonth": return $"format(dateadd('d', -1, dateadd('m', 1, {MsAccessUtils.GetCastSql(getExp(exp.Arguments[0]), typeof(string))} + '-' + {MsAccessUtils.GetCastSql(getExp(exp.Arguments[1]), typeof(string))} + '-1')),'d')";
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case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})";
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case "IsLeapYear":
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var isLeapYearArgs1 = getExp(exp.Arguments[0]);
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return $"(({isLeapYearArgs1}) mod 4=0 AND ({isLeapYearArgs1}) mod 100<>0 OR ({isLeapYearArgs1}) mod 400=0)";
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case "Parse": return MsAccessUtils.GetCastSql(getExp(exp.Arguments[0]), typeof(DateTime));
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case "ParseExact":
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case "TryParse":
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case "TryParseExact": return MsAccessUtils.GetCastSql(getExp(exp.Arguments[0]), typeof(DateTime));
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}
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}
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else
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{
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var left = getExp(exp.Object);
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var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]);
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switch (exp.Method.Name)
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{
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case "Add": return $"dateadd('s', {args1}, {left})";
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case "AddDays": return $"dateadd('d', {args1}, {left})";
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case "AddHours": return $"dateadd('h', {args1}, {left})";
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case "AddMilliseconds": return $"dateadd('s', ({args1})/1000, {left})";
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case "AddMinutes": return $"dateadd('n', {args1}, {left})";
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case "AddMonths": return $"dateadd('m', {args1}, {left})";
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case "AddSeconds": return $"dateadd('s', {args1}, {left})";
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case "AddTicks": return $"dateadd('s', ({args1})/10000000, {left})";
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case "AddYears": return $"dateadd('yyyy', {args1}, {left})";
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case "Subtract":
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switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GetGenericArguments().FirstOrDefault() : exp.Arguments[0].Type).FullName)
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{
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case "System.DateTime": return $"datediff('s', {args1}, {left})";
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case "System.TimeSpan": return $"dateadd('s', ({args1})*-1, {left})";
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}
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break;
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case "Equals": return $"({left} = {args1})";
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case "CompareTo": return $"datediff('s',{args1},{left})";
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case "ToString": return exp.Arguments.Count == 0 ? $"format({left},'yyyy-mm-dd HH:mm:ss')" : null;
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}
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}
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return null;
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}
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public override string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, ExpTSC tsc)
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{
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
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if (exp.Object == null)
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{
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switch (exp.Method.Name)
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{
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case "Compare": return $"({getExp(exp.Arguments[0])}-({getExp(exp.Arguments[1])}))";
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case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})";
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case "FromDays": return $"(({getExp(exp.Arguments[0])})*{60 * 60 * 24})";
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case "FromHours": return $"(({getExp(exp.Arguments[0])})*{60 * 60})";
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case "FromMilliseconds": return $"(({getExp(exp.Arguments[0])})/1000)";
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case "FromMinutes": return $"(({getExp(exp.Arguments[0])})*60)";
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case "FromSeconds": return $"({getExp(exp.Arguments[0])})";
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case "FromTicks": return $"(({getExp(exp.Arguments[0])})/10000000)";
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case "Parse": return MsAccessUtils.GetCastSql(getExp(exp.Arguments[0]), typeof(long));
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case "ParseExact":
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case "TryParse":
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case "TryParseExact": return MsAccessUtils.GetCastSql(getExp(exp.Arguments[0]), typeof(long));
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}
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}
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else
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{
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var left = getExp(exp.Object);
|
||||
var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]);
|
||||
switch (exp.Method.Name)
|
||||
{
|
||||
case "Add": return $"({left}+{args1})";
|
||||
case "Subtract": return $"({left}-({args1}))";
|
||||
case "Equals": return $"({left} = {args1})";
|
||||
case "CompareTo": return $"({left}-({args1}))";
|
||||
case "ToString": return MsAccessUtils.GetCastSql(left, typeof(string));
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
public override string ExpressionLambdaToSqlCallConvert(MethodCallExpression exp, ExpTSC tsc)
|
||||
{
|
||||
Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
|
||||
if (exp.Object == null && exp.Method.DeclaringType == typeof(Convert))
|
||||
{
|
||||
var retBefore = getExp(exp.Arguments[0]);
|
||||
var retAfter = MsAccessUtils.GetCastSql(retBefore, exp.Method.ReturnType.NullableTypeOrThis());
|
||||
if (retBefore != retAfter) return retAfter;
|
||||
}
|
||||
return null;
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user