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530 lines
33 KiB
C#
530 lines
33 KiB
C#
using FreeSql.Internal;
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using System;
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using System.Collections;
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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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using System.Text.RegularExpressions;
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namespace FreeSql.Dameng
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{
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class DamengExpression : CommonExpression
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{
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public DamengExpression(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 (exp.Type.NullableTypeOrThis().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 number)";
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case "System.Char": return $"substr(to_char({getExp(operandExp)}), 1, 1)";
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case "System.DateTime": return $"to_timestamp({getExp(operandExp)},'YYYY-MM-DD HH24:MI:SS.FF6')";
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case "System.Decimal": return $"cast({getExp(operandExp)} as number)";
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case "System.Double": return $"cast({getExp(operandExp)} as number)";
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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 number)";
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case "System.Single": return $"cast({getExp(operandExp)} as number)";
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case "System.String": return $"to_char({getExp(operandExp)})";
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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 number)";
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case "System.Guid":
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if (tsc.mapType == typeof(byte[])) return $"hextoraw({getExp(operandExp)})";
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return $"to_char({getExp(operandExp)})";
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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 number)";
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case "System.Char": return $"substr(to_char({getExp(callExp.Arguments[0])}), 1, 1)";
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case "System.DateTime": return $"to_timestamp({getExp(callExp.Arguments[0])},'YYYY-MM-DD HH24:MI:SS.FF6')";
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case "System.Decimal": return $"cast({getExp(callExp.Arguments[0])} as number)";
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case "System.Double": return $"cast({getExp(callExp.Arguments[0])} as number)";
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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 number)";
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case "System.Single": return $"cast({getExp(callExp.Arguments[0])} as number)";
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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 number)";
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case "System.Guid":
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if (tsc.mapType == typeof(byte[])) return $"hextoraw({getExp(callExp.Arguments[0])})";
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return $"to_char({getExp(callExp.Arguments[0])})";
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}
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return null;
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case "NewGuid":
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return null;
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case "Next":
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if (callExp.Object?.Type == typeof(Random)) return "cast(dbms_random.value*1000000000 as number)";
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return null;
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case "NextDouble":
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if (callExp.Object?.Type == typeof(Random)) return "dbms_random.value";
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return null;
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case "Random":
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if (callExp.Method.DeclaringType.IsNumberType()) return "dbms_random.value";
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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 ? $"to_char({getExp(callExp.Object)})" : 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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if (argIndex >= callExp.Arguments.Count) break;
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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 $"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 _common.Now;
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case "UtcNow": return _common.NowUtc;
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case "Today": return "trunc(systimestamp)";
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case "MinValue": return "to_timestamp('0001-01-01 00:00:00','YYYY-MM-DD HH24:MI:SS.FF6')";
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case "MaxValue": return "to_timestamp('9999-12-31 23:59:59','YYYY-MM-DD HH24:MI:SS.FF6')";
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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 $"trunc({left})";
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case "TimeOfDay": return $"(cast({left} as timestamp with time zone)-trunc({left}))";
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case "DayOfWeek": return $"case when to_char({left},'D')='7' then 0 else cast(to_char({left},'D') as number) end";
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case "Day": return $"cast(to_char({left},'DD') as number)";
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case "DayOfYear": return $"cast(to_char({left},'DDD') as number)";
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case "Month": return $"cast(to_char({left},'MM') as number)";
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case "Year": return $"cast(to_char({left},'YYYY') as number)";
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case "Hour": return $"cast(to_char({left},'HH24') as number)";
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case "Minute": return $"cast(to_char({left},'MI') as number)";
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case "Second": return $"cast(to_char({left},'SS') as number)";
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case "Millisecond": return $"cast(to_char({left},'FF3') as number)";
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case "Ticks": return $"cast(to_char({left},'FF7') as number)";
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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 "numtodsinterval(0,'second')";
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case "MinValue": return "numtodsinterval(-233720368.5477580,'second')";
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case "MaxValue": return "numtodsinterval(233720368.5477580,'second')";
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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 $"extract(day from {left})";
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case "Hours": return $"extract(hour from {left})";
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case "Milliseconds": return $"cast(substr(extract(second from {left})-floor(extract(second from {left})),3,3) as number)";
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case "Minutes": return $"extract(minute from {left})";
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case "Seconds": return $"floor(extract(second from {left}))";
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case "Ticks": return $"(extract(day from {left})*86400+extract(hour from {left})*3600+extract(minute from {left})*60+extract(second from {left}))*10000000";
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case "TotalDays": return $"extract(day from {left})";
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case "TotalHours": return $"(extract(day from {left})*24+extract(hour from {left}))";
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case "TotalMilliseconds": return $"(extract(day from {left})*86400+extract(hour from {left})*3600+extract(minute from {left})*60+extract(second from {left}))*1000";
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case "TotalMinutes": return $"(extract(day from {left})*1440+extract(hour from {left})*60+extract(minute from {left}))";
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case "TotalSeconds": return $"(extract(day from {left})*86400+extract(hour from {left})*3600+extract(minute from {left})*60+extract(second from {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 $"({arg2} is null or {arg2} = '' or ltrim({arg2}) = '')";
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case "Concat":
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return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), null);
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case "Format":
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if (exp.Arguments[0].NodeType != ExpressionType.Constant) throw new Exception($"未实现函数表达式 {exp} 解析，参数 {exp.Arguments[0]} 必须为常量");
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var expArgs = exp.Arguments.Where((a, z) => z > 0).Select(a => $"'||{_common.IsNull(ExpressionLambdaToSql(a, tsc), "''")}||'").ToArray();
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return string.Format(ExpressionLambdaToSql(exp.Arguments[0], tsc), expArgs);
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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, "%") : $"(to_char({args0Value})||'%')")}";
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if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%'||to_char({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 ('%'||to_char({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 $"(instr({left}, {indexOfFindStr}, {locateArgs1}, 1)-1)";
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}
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return $"(instr({left}, {indexOfFindStr}, 1, 1))-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(both {getExp(argsTrim01)} from {left})";
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if (exp.Method.Name == "TrimStart") left = $"ltrim({left},{getExp(argsTrim01)})";
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if (exp.Method.Name == "TrimEnd") left = $"rtrim({left},{getExp(argsTrim01)})";
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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 $"case when {left} = {getExp(exp.Arguments[0])} then 0 when {left} > {getExp(exp.Arguments[0])} then 1 else -1 end";
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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 $"floor({getExp(exp.Arguments[0])})";
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case "Ceiling": return $"ceil({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":
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if (exp.Arguments.Count > 1) return $"log({getExp(exp.Arguments[1])},{getExp(exp.Arguments[0])})";
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return $"log(2.7182818284590451,{getExp(exp.Arguments[0])})";
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case "Log10": return $"log(10,{getExp(exp.Arguments[0])})";
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case "Pow": return $"power({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 $"trunc({getExp(exp.Arguments[0])}, 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 $"extract(day from ({getExp(exp.Arguments[0])}-({getExp(exp.Arguments[1])})))";
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case "DaysInMonth": return $"cast(to_char(last_day(to_date(({getExp(exp.Arguments[0])})||'-'||({getExp(exp.Arguments[1])})||'-01','yyyy-mm-dd')),'DD') as number)";
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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 $"(mod({isLeapYearArgs1},4)=0 AND mod({isLeapYearArgs1},100)<>0 OR mod({isLeapYearArgs1},400)=0)";
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case "Parse": return $"to_timestamp({getExp(exp.Arguments[0])},'YYYY-MM-DD HH24:MI:SS.FF6')";
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case "ParseExact":
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case "TryParse":
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case "TryParseExact": return $"to_timestamp({getExp(exp.Arguments[0])},'YYYY-MM-DD HH24:MI:SS.FF6')";
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}
|
||
}
|
||
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 "AddDays": return $"({left}+{args1})";
|
||
case "AddHours": return $"({left}+({args1})/24)";
|
||
case "AddMilliseconds": return $"({left}+({args1})/86400000)";
|
||
case "AddMinutes": return $"({left}+({args1})/1440)";
|
||
case "AddMonths": return $"add_months({left},{args1})";
|
||
case "AddSeconds": return $"({left}+({args1})/86400)";
|
||
case "AddTicks": return $"({left}+({args1})/864000000000)";
|
||
case "AddYears": return $"add_months({left},({args1})*12)";
|
||
case "Subtract":
|
||
switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GetGenericArguments().FirstOrDefault() : exp.Arguments[0].Type).FullName)
|
||
{
|
||
case "System.DateTime": return $"(cast({left} as timestamp with time zone)-{args1})";
|
||
case "System.TimeSpan": return $"({left}-{args1})";
|
||
}
|
||
break;
|
||
case "Equals": return $"({left} = {args1})";
|
||
case "CompareTo": return $"extract(day from ({left}-({args1})))";
|
||
case "ToString":
|
||
if (left.StartsWith("'") || left.EndsWith("'")) left = $"to_timestamp({left},'YYYY-MM-DD HH24:MI:SS.FF6')";
|
||
if (exp.Arguments.Count == 0) return $"to_char({left},'YYYY-MM-DD HH24:MI:SS.FF6')";
|
||
switch (args1)
|
||
{
|
||
case "'yyyy-MM-dd HH:mm:ss'": return $"to_char({left},'YYYY-MM-DD HH24:MI:SS')";
|
||
case "'yyyy-MM-dd HH:mm'": return $"to_char({left},'YYYY-MM-DD HH24:MI')";
|
||
case "'yyyy-MM-dd HH'": return $"to_char({left},'YYYY-MM-DD HH24')";
|
||
case "'yyyy-MM-dd'": return $"to_char({left},'YYYY-MM-DD')";
|
||
case "'yyyy-MM'": return $"to_char({left},'YYYY-MM')";
|
||
case "'yyyyMMddHHmmss'": return $"to_char({left},'YYYYMMDDHH24MISS')";
|
||
case "'yyyyMMddHHmm'": return $"to_char({left},'YYYYMMDDHH24MI')";
|
||
case "'yyyyMMddHH'": return $"to_char({left},'YYYYMMDDHH24')";
|
||
case "'yyyyMMdd'": return $"to_char({left},'YYYYMMDD')";
|
||
case "'yyyyMM'": return $"to_char({left},'YYYYMM')";
|
||
case "'yyyy'": return $"to_char({left},'YYYY')";
|
||
case "'HH:mm:ss'": return $"to_char({left},'HH24:MI:SS')";
|
||
}
|
||
args1 = Regex.Replace(args1, "(yyyy|yy|MM|dd|HH|hh|mm|ss|tt)", m =>
|
||
{
|
||
switch (m.Groups[1].Value)
|
||
{
|
||
case "yyyy": return "YYYY";
|
||
case "yy": return "YY";
|
||
case "MM": return "%_a1";
|
||
case "dd": return "%_a2";
|
||
case "HH": return "%_a3";
|
||
case "mm": return "%_a4";
|
||
case "ss": return "SS";
|
||
case "tt": return "%_a5";
|
||
}
|
||
return m.Groups[0].Value;
|
||
});
|
||
var argsFinds = new[] { "YYYY", "YY", "%_a1", "%_a2", "%_a3", "%_a4", "SS", "%_a5" };
|
||
var argsSpts = Regex.Split(args1, "(M|d|H|hh|h|m|s|t)");
|
||
for (var a = 0; a < argsSpts.Length; a++)
|
||
{
|
||
switch (argsSpts[a])
|
||
{
|
||
case "M": argsSpts[a] = $"ltrim(to_char({left},'MM'),'0')"; break;
|
||
case "d": argsSpts[a] = $"case when substr(to_char({left},'DD'),1,1) = '0' then substr(to_char({left},'DD'),2,1) else to_char({left},'DD') end"; break;
|
||
case "H": argsSpts[a] = $"case when substr(to_char({left},'HH24'),1,1) = '0' then substr(to_char({left},'HH24'),2,1) else to_char({left},'HH24') end"; break;
|
||
case "hh": argsSpts[a] = $"case mod(cast(case when substr(to_char({left},'HH24'),1,1) = '0' then substr(to_char({left},'HH24'),2,1) else to_char({left},'HH24') end as number),12) when 0 then '12' when 1 then '01' when 2 then '02' when 3 then '03' when 4 then '04' when 5 then '05' when 6 then '06' when 7 then '07' when 8 then '08' when 9 then '09' when 10 then '10' when 11 then '11' end"; break;
|
||
case "h": argsSpts[a] = $"case mod(cast(case when substr(to_char({left},'HH24'),1,1) = '0' then substr(to_char({left},'HH24'),2,1) else to_char({left},'HH24') end as number),12) when 0 then '12' when 1 then '1' when 2 then '2' when 3 then '3' when 4 then '4' when 5 then '5' when 6 then '6' when 7 then '7' when 8 then '8' when 9 then '9' when 10 then '10' when 11 then '11' end"; break;
|
||
case "m": argsSpts[a] = $"case when substr(to_char({left},'MI'),1,1) = '0' then substr(to_char({left},'MI'),2,1) else to_char({left},'MI') end"; break;
|
||
case "s": argsSpts[a] = $"case when substr(to_char({left},'SS'),1,1) = '0' then substr(to_char({left},'SS'),2,1) else to_char({left},'SS') end"; break;
|
||
case "t": argsSpts[a] = $"rtrim(to_char({left},'AM'),'M')"; break;
|
||
default:
|
||
var argsSptsA = argsSpts[a];
|
||
if (argsSptsA.StartsWith("'")) argsSptsA = argsSptsA.Substring(1);
|
||
if (argsSptsA.EndsWith("'")) argsSptsA = argsSptsA.Remove(argsSptsA.Length - 1);
|
||
argsSpts[a] = argsFinds.Any(m => argsSptsA.Contains(m)) ? $"to_char({left},'{argsSptsA}')" : $"'{argsSptsA}'";
|
||
break;
|
||
//达梦 to_char(to_timestamp('2020-02-01 00:00:00.000000','YYYY-MM-DD HH24:MI:SS.FF6'),' ') 无效
|
||
}
|
||
}
|
||
if (argsSpts.Length > 0) args1 = $"({string.Join(" || ", argsSpts.Where(a => a != "''"))})";
|
||
return args1.Replace("%_a1", "MM").Replace("%_a2", "DD").Replace("%_a3", "HH24").Replace("%_a4", "MI").Replace("%_a5", "AM");
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
public override string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, ExpTSC tsc)
|
||
{
|
||
Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
|
||
if (exp.Object == null)
|
||
{
|
||
switch (exp.Method.Name)
|
||
{
|
||
case "Compare": return $"extract(day from ({getExp(exp.Arguments[0])}-({getExp(exp.Arguments[1])})))";
|
||
case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})";
|
||
case "FromDays": return $"numtodsinterval(({getExp(exp.Arguments[0])})*{(long)60 * 60 * 24},'second')";
|
||
case "FromHours": return $"numtodsinterval(({getExp(exp.Arguments[0])})*{(long)60 * 60},'second')";
|
||
case "FromMilliseconds": return $"numtodsinterval(({getExp(exp.Arguments[0])})/1000,'second')";
|
||
case "FromMinutes": return $"numtodsinterval(({getExp(exp.Arguments[0])})*60,'second')";
|
||
case "FromSeconds": return $"numtodsinterval(({getExp(exp.Arguments[0])}),'second')";
|
||
case "FromTicks": return $"numtodsinterval(({getExp(exp.Arguments[0])})/10000000,'second')";
|
||
case "Parse": return $"cast({getExp(exp.Arguments[0])} as interval day(9) to second(6))";
|
||
case "ParseExact":
|
||
case "TryParse":
|
||
case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as interval day(9) to second(6))";
|
||
}
|
||
}
|
||
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} = {args1})";
|
||
case "CompareTo": return $"extract(day from ({left}-({args1})))";
|
||
case "ToString": return $"to_char({left})";
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
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 number)";
|
||
case "ToChar": return $"substr(to_char({getExp(exp.Arguments[0])}), 1, 1)";
|
||
case "ToDateTime": return $"to_timestamp({getExp(exp.Arguments[0])},'YYYY-MM-DD HH24:MI:SS.FF6')";
|
||
case "ToDecimal": return $"cast({getExp(exp.Arguments[0])} as number)";
|
||
case "ToDouble": return $"cast({getExp(exp.Arguments[0])} as number)";
|
||
case "ToInt16":
|
||
case "ToInt32":
|
||
case "ToInt64":
|
||
case "ToSByte": return $"cast({getExp(exp.Arguments[0])} as number)";
|
||
case "ToSingle": return $"cast({getExp(exp.Arguments[0])} as number)";
|
||
case "ToString": return $"to_char({getExp(exp.Arguments[0])})";
|
||
case "ToUInt16":
|
||
case "ToUInt32":
|
||
case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as number)";
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
}
|
||
}
|