mirror of
https://github.com/nsnail/FreeSql.git
synced 2025-04-26 20:52:50 +08:00
457 lines
26 KiB
C#
457 lines
26 KiB
C#
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.MySql
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{
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class MySqlExpression : CommonExpression
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{
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public MySqlExpression(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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switch (gentype.ToString())
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{
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case "System.Boolean": return $"({getExp(operandExp)} not in ('0','false'))";
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case "System.Byte": return $"cast({getExp(operandExp)} as unsigned)";
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case "System.Char": return $"substr(cast({getExp(operandExp)} as char), 1, 1)";
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case "System.DateTime": return $"cast({getExp(operandExp)} as datetime)";
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case "System.Decimal": return $"cast({getExp(operandExp)} as decimal(36,18))";
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case "System.Double": return $"cast({getExp(operandExp)} as decimal(32,16))";
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case "System.Int16":
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case "System.Int32":
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case "System.Int64":
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case "System.SByte": return $"cast({getExp(operandExp)} as signed)";
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case "System.Single": return $"cast({getExp(operandExp)} as decimal(14,7))";
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case "System.String": return $"cast({getExp(operandExp)} as char)";
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case "System.UInt16":
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case "System.UInt32":
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case "System.UInt64": return $"cast({getExp(operandExp)} as unsigned)";
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case "System.Guid": return $"substr(cast({getExp(operandExp)} as char), 1, 36)";
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}
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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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switch (callExp.Method.DeclaringType.NullableTypeOrThis().ToString())
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{
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case "System.Boolean": return $"({getExp(callExp.Arguments[0])} not in ('0','false'))";
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case "System.Byte": return $"cast({getExp(callExp.Arguments[0])} as unsigned)";
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case "System.Char": return $"substr(cast({getExp(callExp.Arguments[0])} as char), 1, 1)";
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case "System.DateTime": return $"cast({getExp(callExp.Arguments[0])} as datetime)";
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case "System.Decimal": return $"cast({getExp(callExp.Arguments[0])} as decimal(36,18))";
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case "System.Double": return $"cast({getExp(callExp.Arguments[0])} as decimal(32,16))";
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case "System.Int16":
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case "System.Int32":
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case "System.Int64":
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case "System.SByte": return $"cast({getExp(callExp.Arguments[0])} as signed)";
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case "System.Single": return $"cast({getExp(callExp.Arguments[0])} as decimal(14,7))";
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case "System.UInt16":
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case "System.UInt32":
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case "System.UInt64": return $"cast({getExp(callExp.Arguments[0])} as unsigned)";
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case "System.Guid": return $"substr(cast({getExp(callExp.Arguments[0])} as char), 1, 36)";
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}
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break;
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case "NewGuid":
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break;
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case "Next":
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if (callExp.Object?.Type == typeof(Random)) return "cast(rand()*1000000000 as signed)";
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break;
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case "NextDouble":
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if (callExp.Object?.Type == typeof(Random)) return "rand()";
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break;
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case "Random":
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if (callExp.Method.DeclaringType.IsNumberType()) return "rand()";
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break;
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case "ToString":
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if (callExp.Object != null) return $"cast({getExp(callExp.Object)} as char)";
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break;
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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.IsArray || typeof(IList).IsAssignableFrom(callExp.Method.DeclaringType))
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{
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var left = objExp == null ? null : getExp(objExp);
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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
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return $"({getExp(callExp.Arguments[argIndex])}) in {left}";
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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 $"char_length({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 "now()";
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case "UtcNow": return "utc_timestamp()";
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case "Today": return "curdate()";
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case "MinValue": return "cast('0001/1/1 0:00:00' as datetime)";
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case "MaxValue": return "cast('9999/12/31 23:59:59' as datetime)";
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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 $"cast(date_format({left},'%Y-%m-%d') as datetime)";
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case "TimeOfDay": return $"timestampdiff(microsecond, date_format({left},'%Y-%m-%d'), {left})";
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case "DayOfWeek": return $"(dayofweek({left})-1)";
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case "Day": return $"dayofmonth({left})";
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case "DayOfYear": return $"dayofyear({left})";
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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 $"floor(microsecond({left})/1000)";
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case "Ticks": return $"(timestampdiff(microsecond, '0001-1-1', {left})*10)";
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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 $"(({left}) div {(long)1000000 * 60 * 60 * 24})";
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case "Hours": return $"(({left}) div {(long)1000000 * 60 * 60} mod 24)";
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case "Milliseconds": return $"(({left}) div 1000 mod 1000)";
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case "Minutes": return $"(({left}) div {(long)1000000 * 60} mod 60)";
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case "Seconds": return $"(({left}) div 1000000 mod 60)";
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case "Ticks": return $"(({left}) * 10)";
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case "TotalDays": return $"(({left}) / {(long)1000000 * 60 * 60 * 24})";
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case "TotalHours": return $"(({left}) / {(long)1000000 * 60 * 60})";
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case "TotalMilliseconds": return $"(({left}) / 1000)";
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case "TotalMinutes": return $"(({left}) / {(long)1000000 * 60})";
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case "TotalSeconds": return $"(({left}) / 1000000)";
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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(), null);
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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, "%") : $"concat({args0Value}, '%')")}";
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if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"concat('%', {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 concat('%', {args0Value}, '%')";
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case "ToLower": return $"lower({left})";
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case "ToUpper": return $"upper({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 $"substr({left}, {substrArgs1})";
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return $"substr({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 $"(locate({left}, {indexOfFindStr}, {locateArgs1})-1)";
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}
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return $"(locate({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":
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case "TrimStart":
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case "TrimEnd":
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if (exp.Arguments.Count == 0)
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{
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if (exp.Method.Name == "Trim") return $"trim({left})";
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if (exp.Method.Name == "TrimStart") return $"ltrim({left})";
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if (exp.Method.Name == "TrimEnd") return $"rtrim({left})";
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}
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foreach (var argsTrim02 in exp.Arguments)
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{
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var argsTrim01s = new[] { argsTrim02 };
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if (argsTrim02.NodeType == ExpressionType.NewArrayInit)
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{
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var arritem = argsTrim02 as NewArrayExpression;
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argsTrim01s = arritem.Expressions.ToArray();
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}
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foreach (var argsTrim01 in argsTrim01s)
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{
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if (exp.Method.Name == "Trim") left = $"trim({getExp(argsTrim01)} from {left})";
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if (exp.Method.Name == "TrimStart") left = $"trim(leading {getExp(argsTrim01)} from {left})";
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if (exp.Method.Name == "TrimEnd") left = $"trim(trailing {getExp(argsTrim01)} from {left})";
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}
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}
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return 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 $"strcmp({left}, {getExp(exp.Arguments[0])})";
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case "Equals": return $"({left} = {getExp(exp.Arguments[0])})";
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}
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}
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throw new Exception($"MySqlExpression 未实现函数表达式 {exp} 解析");
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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 $"floor({getExp(exp.Arguments[0])})";
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case "Ceiling": return $"ceiling({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])})";
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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 $"sqrt({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 $"truncate({getExp(exp.Arguments[0])}, 0)";
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}
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throw new Exception($"MySqlExpression 未实现函数表达式 {exp} 解析");
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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 $"dayofmonth(last_day(concat({getExp(exp.Arguments[0])}, '-', {getExp(exp.Arguments[1])}, '-01')))";
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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})%4=0 AND ({isLeapYearArgs1})%100<>0 OR ({isLeapYearArgs1})%400=0)";
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case "Parse": return $"cast({getExp(exp.Arguments[0])} as datetime)";
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case "ParseExact":
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case "TryParse":
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case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as 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 $"date_add({left}, interval ({args1}) microsecond)";
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case "AddDays": return $"date_add({left}, interval ({args1}) day)";
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case "AddHours": return $"date_add({left}, interval ({args1}) hour)";
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case "AddMilliseconds": return $"date_add({left}, interval ({args1})*1000 microsecond)";
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case "AddMinutes": return $"date_add({left}, interval ({args1}) minute)";
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case "AddMonths": return $"date_add({left}, interval ({args1}) month)";
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case "AddSeconds": return $"date_add({left}, interval ({args1}) second)";
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case "AddTicks": return $"date_add({left}, interval ({args1})/10 microsecond)";
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case "AddYears": return $"date_add({left}, interval ({args1}) year)";
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case "Subtract":
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switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault() : exp.Arguments[0].Type).FullName)
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{
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case "System.DateTime": return $"timestampdiff(microsecond, {args1}, {left})";
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case "System.TimeSpan": return $"date_sub({left}, interval ({args1}) microsecond)";
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}
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break;
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case "Equals": return $"({left} = {getExp(exp.Arguments[0])})";
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case "CompareTo": return $"timestampdiff(microsecond,{args1},{left})";
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case "ToString": return $"date_format({left}, '%Y-%m-%d %H:%i:%s.%f')";
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}
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}
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throw new Exception($"MySqlExpression 未实现函数表达式 {exp} 解析");
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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)
|
|
{
|
|
case "Compare": return $"({getExp(exp.Arguments[0])}-({getExp(exp.Arguments[1])}))";
|
|
case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})";
|
|
case "FromDays": return $"(({getExp(exp.Arguments[0])})*{(long)1000000 * 60 * 60 * 24})";
|
|
case "FromHours": return $"(({getExp(exp.Arguments[0])})*{(long)1000000 * 60 * 60})";
|
|
case "FromMilliseconds": return $"(({getExp(exp.Arguments[0])})*1000)";
|
|
case "FromMinutes": return $"(({getExp(exp.Arguments[0])})*{(long)1000000 * 60})";
|
|
case "FromSeconds": return $"(({getExp(exp.Arguments[0])})*1000000)";
|
|
case "FromTicks": return $"(({getExp(exp.Arguments[0])})/10)";
|
|
case "Parse": return $"cast({getExp(exp.Arguments[0])} as signed)";
|
|
case "ParseExact":
|
|
case "TryParse":
|
|
case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as signed)";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
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} = {getExp(exp.Arguments[0])})";
|
|
case "CompareTo": return $"({left}-({getExp(exp.Arguments[0])}))";
|
|
case "ToString": return $"cast({left} as char)";
|
|
}
|
|
}
|
|
throw new Exception($"MySqlExpression 未实现函数表达式 {exp} 解析");
|
|
}
|
|
public override string ExpressionLambdaToSqlCallConvert(MethodCallExpression exp, ExpTSC tsc)
|
|
{
|
|
Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
|
|
if (exp.Object == null)
|
|
{
|
|
switch (exp.Method.Name)
|
|
{
|
|
case "ToBoolean": return $"({getExp(exp.Arguments[0])} not in ('0','false'))";
|
|
case "ToByte": return $"cast({getExp(exp.Arguments[0])} as unsigned)";
|
|
case "ToChar": return $"substr(cast({getExp(exp.Arguments[0])} as char), 1, 1)";
|
|
case "ToDateTime": return $"cast({getExp(exp.Arguments[0])} as datetime)";
|
|
case "ToDecimal": return $"cast({getExp(exp.Arguments[0])} as decimal(36,18))";
|
|
case "ToDouble": return $"cast({getExp(exp.Arguments[0])} as decimal(32,16))";
|
|
case "ToInt16":
|
|
case "ToInt32":
|
|
case "ToInt64":
|
|
case "ToSByte": return $"cast({getExp(exp.Arguments[0])} as signed)";
|
|
case "ToSingle": return $"cast({getExp(exp.Arguments[0])} as decimal(14,7))";
|
|
case "ToString": return $"cast({getExp(exp.Arguments[0])} as char)";
|
|
case "ToUInt16":
|
|
case "ToUInt32":
|
|
case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as unsigned)";
|
|
}
|
|
}
|
|
throw new Exception($"MySqlExpression 未实现函数表达式 {exp} 解析");
|
|
}
|
|
}
|
|
}
|