public override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, ExpTSC tsc)
{
if (exp.Expression == null)
{
switch (exp.Member.Name)
{
case "Zero": return("0");
case "MinValue": return("-922337203685.477580"); //秒 Ticks / 1000,000,0
case "MaxValue": return("922337203685.477580");
}
return(null);
}
var left = ExpressionLambdaToSql(exp.Expression, tsc);
switch (exp.Member.Name)
{
case "Days": return($"floor(({left})/{60 * 60 * 24})");
case "Hours": return($"mod(({left})/{60 * 60},24)");
case "Milliseconds": return($"(cast({left} as bigint)*1000)");
case "Minutes": return($"mod(({left})/60,60)");
case "Seconds": return($"mod({left},60)");
case "Ticks": return($"(cast({left} as bigint)*10000000)");
case "TotalDays": return($"(({left})/{60 * 60 * 24})");
case "TotalHours": return($"(({left})/{60 * 60})");
case "TotalMilliseconds": return($"(cast({left} as bigint)*1000)");
case "TotalMinutes": return($"(({left})/60)");
case "TotalSeconds": return($"({left})");
}
return(null);
}
public override string ExpressionLambdaToSqlMemberAccessString(MemberExpression exp, ExpTSC tsc)
{
if (exp.Expression == null)
{
switch (exp.Member.Name)
{
case "Empty": return("''");
}
return(null);
}
var left = ExpressionLambdaToSql(exp.Expression, tsc);
switch (exp.Member.Name)
{
case "Length": return($"char_length({left})");
}
return(null);
}
public override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, ExpTSC tsc)
{
if (exp.Expression == null)
{
switch (exp.Member.Name)
{
case "Now": return(_common.Now);
case "UtcNow": return(_common.NowUtc);
case "Today": return("current_date");
case "MinValue": return("timestamp '0001/1/1 0:00:00'");
case "MaxValue": return("timestamp'9999/12/31 23:59:59'");
}
return(null);
}
var left = ExpressionLambdaToSql(exp.Expression, tsc);
switch (exp.Member.Name)
{
case "Date": return($"cast(extract(year from {left}) || '-' || extract(month from {left}) || '-' || extract(day from {left}) as timestamp)");
case "TimeOfDay": return($"datediff(second from cast(extract(year from {left}) || '-' || extract(month from {left}) || '-' || extract(day from {left}) as timestamp) to {left})");
case "DayOfWeek": return($"extract(weekday from {left})");
case "Day": return($"extract(day from {left})");
case "DayOfYear": return($"datediff(day from {left} to cast(extract(year from {left}) || '-' || extract(month from {left}) || '-' || extract(day from {left}) as timestamp))");
case "Month": return($"extract(month from {left})");
case "Year": return($"extract(year from {left})");
case "Hour": return($"extract(hour from {left})");
case "Minute": return($"extract(minute from {left})");
case "Second": return($"extract(second from {left})");
case "Millisecond": return($"extract(millisecond from {left})");
case "Ticks": return($"(extract(second from {left})*10000000+621355968000000000)");
}
return(null);
}
public override string ExpressionLambdaToSqlOther(Expression exp, ExpTSC tsc)
{
Func <Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
switch (exp.NodeType)
{
case ExpressionType.ArrayLength:
var arrOper = (exp as UnaryExpression)?.Operand;
if (arrOper.Type == typeof(byte[]))
{
return($"octet_length({getExp(arrOper)})");
}
break;
case ExpressionType.Convert:
var operandExp = (exp as UnaryExpression)?.Operand;
var gentype = exp.Type.NullableTypeOrThis();
if (gentype != operandExp.Type.NullableTypeOrThis())
{
switch (gentype.ToString())
{
case "System.Boolean": return($"({getExp(operandExp)} not in ('0','false'))");
case "System.Byte": return($"cast({getExp(operandExp)} as smallint)");
case "System.Char": return($"substring(cast({getExp(operandExp)} as varchar(10)) from 1 for 1)");
case "System.DateTime": return(ExpressionConstDateTime(operandExp) ?? $"cast({getExp(operandExp)} as timestamp)");
case "System.Decimal": return($"cast({getExp(operandExp)} as decimal(18,6))");
case "System.Double": return($"cast({getExp(operandExp)} as decimal(18,10))");
case "System.Int16": return($"cast({getExp(operandExp)} as smallint)");
case "System.Int32": return($"cast({getExp(operandExp)} as integer)");
case "System.Int64": return($"cast({getExp(operandExp)} as bigint)");
case "System.SByte": return($"cast({getExp(operandExp)} as smallint)");
case "System.Single": return($"cast({getExp(operandExp)} as decimal(14,7))");
case "System.String": return($"cast({getExp(operandExp)} as blob sub_type 1)");
case "System.UInt16": return($"cast({getExp(operandExp)} as integer)");
case "System.UInt32": return($"cast({getExp(operandExp)} as bigint)");
case "System.UInt64": return($"cast({getExp(operandExp)} as decimal(21,0))");
case "System.Guid": return($"substring(cast({getExp(operandExp)} as char(36)) from 1 for 36)");
}
}
break;
case ExpressionType.Call:
var callExp = exp as MethodCallExpression;
switch (callExp.Method.Name)
{
case "Parse":
case "TryParse":
switch (callExp.Method.DeclaringType.NullableTypeOrThis().ToString())
{
case "System.Boolean": return($"({getExp(callExp.Arguments[0])} not in ('0','false'))");
case "System.Byte": return($"cast({getExp(callExp.Arguments[0])} as smallint)");
case "System.Char": return($"substring(cast({getExp(callExp.Arguments[0])} as varchar(10)) from 1 for 1)");
case "System.DateTime": return(ExpressionConstDateTime(callExp.Arguments[0]) ?? $"cast({getExp(callExp.Arguments[0])} as timestamp)");
case "System.Decimal": return($"cast({getExp(callExp.Arguments[0])} as decimal(18,6))");
case "System.Double": return($"cast({getExp(callExp.Arguments[0])} as decimal(18,10))");
case "System.Int16": return($"cast({getExp(callExp.Arguments[0])} as smallint)");
case "System.Int32": return($"cast({getExp(callExp.Arguments[0])} as integer)");
case "System.Int64": return($"cast({getExp(callExp.Arguments[0])} as bigint)");
case "System.SByte": return($"cast({getExp(callExp.Arguments[0])} as smallint)");
case "System.Single": return($"cast({getExp(callExp.Arguments[0])} as decimal(14,7))");
case "System.String": return($"cast({getExp(callExp.Arguments[0])} as blob sub_type 1)");
case "System.UInt16": return($"cast({getExp(callExp.Arguments[0])} as integer)");
case "System.UInt32": return($"cast({getExp(callExp.Arguments[0])} as bigint)");
case "System.UInt64": return($"cast({getExp(callExp.Arguments[0])} as decimal(18,0))");
case "System.Guid": return($"substring(cast({getExp(callExp.Arguments[0])} as char(36)) from 1 for 36)");
}
return(null);
case "NewGuid":
return(null);
case "Next":
if (callExp.Object?.Type == typeof(Random))
{
return("cast(rand()*1000000000 as integer)");
}
return(null);
case "NextDouble":
if (callExp.Object?.Type == typeof(Random))
{
return("rand()");
}
return(null);
case "Random":
if (callExp.Method.DeclaringType.IsNumberType())
{
return("rand()");
}
return(null);
case "ToString":
if (callExp.Object != null)
{
return(callExp.Arguments.Count == 0 ? $"cast({getExp(callExp.Object)} as blob sub_type 1)" : null);
}
return(null);
}
var objExp = callExp.Object;
var objType = objExp?.Type;
if (objType?.FullName == "System.Byte[]")
{
return(null);
}
var argIndex = 0;
if (objType == null && callExp.Method.DeclaringType == typeof(Enumerable))
{
objExp = callExp.Arguments.FirstOrDefault();
objType = objExp?.Type;
argIndex++;
}
if (objType == null)
{
objType = callExp.Method.DeclaringType;
}
if (objType != null || objType.IsArrayOrList())
{
if (argIndex >= callExp.Arguments.Count)
{
break;
}
tsc.SetMapColumnTmp(null);
var args1 = getExp(callExp.Arguments[argIndex]);
var oldMapType = tsc.SetMapTypeReturnOld(tsc.mapTypeTmp);
var oldDbParams = objExp?.NodeType == ExpressionType.MemberAccess ? tsc.SetDbParamsReturnOld(null) : null; //#900 UseGenerateCommandParameterWithLambda(true) 子查询 bug、以及 #1173 参数化 bug
tsc.isNotSetMapColumnTmp = true;
var left = objExp == null ? null : getExp(objExp);
tsc.isNotSetMapColumnTmp = false;
tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
if (oldDbParams != null)
{
tsc.SetDbParamsReturnOld(oldDbParams);
}
switch (callExp.Method.Name)
{
case "Contains":
//判断 in //在各大 Provider AdoProvider 中已约定，500元素分割, 3空格\r\n4空格
return($"(({args1}) in {left.Replace(", \r\n \r\n", $") \r\n OR ({args1}) in (")})");
}
}
break;
case ExpressionType.NewArrayInit:
var arrExp = exp as NewArrayExpression;
var arrSb = new StringBuilder();
arrSb.Append("(");
for (var a = 0; a < arrExp.Expressions.Count; a++)
{
if (a > 0)
{
arrSb.Append(",");
}
if (a % 500 == 499)
{
arrSb.Append(" \r\n \r\n"); //500元素分割, 3空格\r\n4空格
}
arrSb.Append(getExp(arrExp.Expressions[a]));
}
if (arrSb.Length == 1)
{
arrSb.Append("NULL");
}
return(arrSb.Append(")").ToString());
case ExpressionType.ListInit:
var listExp = exp as ListInitExpression;
var listSb = new StringBuilder();
listSb.Append("(");
for (var a = 0; a < listExp.Initializers.Count; a++)
{
if (listExp.Initializers[a].Arguments.Any() == false)
{
continue;
}
if (a > 0)
{
listSb.Append(",");
}
listSb.Append(getExp(listExp.Initializers[a].Arguments.FirstOrDefault()));
}
if (listSb.Length == 1)
{
listSb.Append("NULL");
}
return(listSb.Append(")").ToString());
case ExpressionType.New:
var newExp = exp as NewExpression;
if (typeof(IList).IsAssignableFrom(newExp.Type))
{
if (newExp.Arguments.Count == 0)
{
return("(NULL)");
}
if (typeof(IEnumerable).IsAssignableFrom(newExp.Arguments[0].Type) == false)
{
return("(NULL)");
}
return(getExp(newExp.Arguments[0]));
}
return(null);
}
return(null);
}
public override string ExpressionLambdaToSqlCallString(MethodCallExpression exp, ExpTSC tsc)
{
Func <Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
if (exp.Object == null)
{
switch (exp.Method.Name)
{
case "IsNullOrEmpty":
var arg1 = getExp(exp.Arguments[0]);
return($"({arg1} is null or {arg1} = '')");
case "IsNullOrWhiteSpace":
var arg2 = getExp(exp.Arguments[0]);
return($"({arg2} is null or {arg2} = '' or ltrim({arg2}) = '')");
case "Concat":
return(_common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), null));
case "Format":
if (exp.Arguments[0].NodeType != ExpressionType.Constant)
{
throw new Exception($"未实现函数表达式 {exp} 解析，参数 {exp.Arguments[0]} 必须为常量");
}
var expArgsHack = exp.Arguments.Count == 2 && exp.Arguments[1].NodeType == ExpressionType.NewArrayInit ?
(exp.Arguments[1] as NewArrayExpression).Expressions : exp.Arguments.Where((a, z) => z > 0);
//3个 {} 时，Arguments 解析出来是分开的
//4个 {} 时，Arguments[1] 只能解析这个出来，然后里面是 NewArray []
var expArgs = expArgsHack.Select(a => $"'||{_common.IsNull(ExpressionLambdaToSql(a, tsc), "''")}||'").ToArray();
return(string.Format(ExpressionLambdaToSql(exp.Arguments[0], tsc), expArgs));
case "Join":
if (exp.IsStringJoin(out var tolistObjectExp, out var toListMethod, out var toListArgs1))
{
var newToListArgs0 = Expression.Call(tolistObjectExp, toListMethod,
Expression.Lambda(
Expression.Call(
typeof(SqlExtExtensions).GetMethod("StringJoinOracleGroupConcat"),
Expression.Convert(toListArgs1.Body, typeof(object)),
Expression.Convert(exp.Arguments[0], typeof(object))),
toListArgs1.Parameters));
var newToListSql = getExp(newToListArgs0);
return(newToListSql);
}
break;
}
}
else
{
var left = getExp(exp.Object);
switch (exp.Method.Name)
{
case "StartsWith":
case "EndsWith":
case "Contains":
var args0Value = getExp(exp.Arguments[0]);
if (args0Value == "NULL")
{
return($"({left}) IS NULL");
}
if (exp.Method.Name == "StartsWith")
{
return($"({left}) LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"(to_char({args0Value})||'%')")}");
}
if (exp.Method.Name == "EndsWith")
{
return($"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%'||to_char({args0Value}))")}");
}
if (args0Value.StartsWith("'") && args0Value.EndsWith("'"))
{
return($"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}");
}
return($"({left}) LIKE ('%'||to_char({args0Value})||'%')");
public override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, ExpTSC tsc)
{
if (exp.Expression == null)
{
switch (exp.Member.Name)
{
case "Zero": return("numtodsinterval(0,'second')");
case "MinValue": return("numtodsinterval(-233720368.5477580,'second')");
case "MaxValue": return("numtodsinterval(233720368.5477580,'second')");
}
return(null);
}
var left = ExpressionLambdaToSql(exp.Expression, tsc);
switch (exp.Member.Name)
{
case "Days": return($"extract(day from {left})");
case "Hours": return($"extract(hour from {left})");
case "Milliseconds": return($"cast(substr(extract(second from {left})-floor(extract(second from {left})),3,3) as number)");
case "Minutes": return($"extract(minute from {left})");
case "Seconds": return($"floor(extract(second from {left}))");
case "Ticks": return($"(extract(day from {left})*86400+extract(hour from {left})*3600+extract(minute from {left})*60+extract(second from {left}))*10000000");
case "TotalDays": return($"extract(day from {left})");
case "TotalHours": return($"(extract(day from {left})*24+extract(hour from {left}))");
case "TotalMilliseconds": return($"(extract(day from {left})*86400+extract(hour from {left})*3600+extract(minute from {left})*60+extract(second from {left}))*1000");
case "TotalMinutes": return($"(extract(day from {left})*1440+extract(hour from {left})*60+extract(minute from {left}))");
case "TotalSeconds": return($"(extract(day from {left})*86400+extract(hour from {left})*3600+extract(minute from {left})*60+extract(second from {left}))");
}
return(null);
}
public override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, ExpTSC tsc)
{
if (exp.Expression == null)
{
switch (exp.Member.Name)
{
case "Now": return(_common.Now);
case "UtcNow": return(_common.NowUtc);
case "Today": return("trunc(systimestamp)");
case "MinValue": return("to_timestamp('0001-01-01 00:00:00','YYYY-MM-DD HH24:MI:SS.FF6')");
case "MaxValue": return("to_timestamp('9999-12-31 23:59:59','YYYY-MM-DD HH24:MI:SS.FF6')");
}
return(null);
}
var left = ExpressionLambdaToSql(exp.Expression, tsc);
switch (exp.Member.Name)
{
case "Date": return($"trunc({left})");
case "TimeOfDay": return($"({left}-trunc({left}))");
case "DayOfWeek": return($"case when to_char({left},'D')='7' then 0 else cast(to_char({left},'D') as number) end");
case "Day": return($"cast(to_char({left},'DD') as number)");
case "DayOfYear": return($"cast(to_char({left},'DDD') as number)");
case "Month": return($"cast(to_char({left},'MM') as number)");
case "Year": return($"cast(to_char({left},'YYYY') as number)");
case "Hour": return($"cast(to_char({left},'HH24') as number)");
case "Minute": return($"cast(to_char({left},'MI') as number)");
case "Second": return($"cast(to_char({left},'SS') as number)");
case "Millisecond": return($"cast(to_char({left},'FF3') as number)");
case "Ticks": return($"cast(to_char({left},'FF7') as number)");
}
return(null);
}
public override string ExpressionLambdaToSqlOther(Expression exp, ExpTSC tsc)
{
Func <Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
switch (exp.NodeType)
{
case ExpressionType.ArrayLength:
var arrOper = (exp as UnaryExpression)?.Operand;
if (arrOper.Type == typeof(byte[]))
{
return($"dbms_lob.getlength({getExp(arrOper)})");
}
break;
case ExpressionType.Convert:
var operandExp = (exp as UnaryExpression)?.Operand;
var gentype = exp.Type.NullableTypeOrThis();
if (gentype != operandExp.Type.NullableTypeOrThis())
{
switch (exp.Type.NullableTypeOrThis().ToString())
{
//case "System.Boolean": return $"({getExp(operandExp)} not in ('0','false'))";
case "System.Byte": return($"cast({getExp(operandExp)} as number)");
case "System.Char": return($"substr(to_char({getExp(operandExp)}), 1, 1)");
case "System.DateTime": return($"to_timestamp({getExp(operandExp)},'YYYY-MM-DD HH24:MI:SS.FF6')");
case "System.Decimal": return($"cast({getExp(operandExp)} as number)");
case "System.Double": return($"cast({getExp(operandExp)} as number)");
case "System.Int16":
case "System.Int32":
case "System.Int64":
case "System.SByte": return($"cast({getExp(operandExp)} as number)");
case "System.Single": return($"cast({getExp(operandExp)} as number)");
case "System.String": return($"to_char({getExp(operandExp)})");
case "System.UInt16":
case "System.UInt32":
case "System.UInt64": return($"cast({getExp(operandExp)} as number)");
case "System.Guid":
if (tsc.mapType == typeof(byte[]))
{
return($"hextoraw({getExp(operandExp)})");
}
return($"to_char({getExp(operandExp)})");
}
}
break;
case ExpressionType.Call:
var callExp = exp as MethodCallExpression;
switch (callExp.Method.Name)
{
case "Parse":
case "TryParse":
switch (callExp.Method.DeclaringType.NullableTypeOrThis().ToString())
{
//case "System.Boolean": return $"({getExp(callExp.Arguments[0])} not in ('0','false'))";
case "System.Byte": return($"cast({getExp(callExp.Arguments[0])} as number)");
case "System.Char": return($"substr(to_char({getExp(callExp.Arguments[0])}), 1, 1)");
case "System.DateTime": return($"to_timestamp({getExp(callExp.Arguments[0])},'YYYY-MM-DD HH24:MI:SS.FF6')");
case "System.Decimal": return($"cast({getExp(callExp.Arguments[0])} as number)");
case "System.Double": return($"cast({getExp(callExp.Arguments[0])} as number)");
case "System.Int16":
case "System.Int32":
case "System.Int64":
case "System.SByte": return($"cast({getExp(callExp.Arguments[0])} as number)");
case "System.Single": return($"cast({getExp(callExp.Arguments[0])} as number)");
case "System.UInt16":
case "System.UInt32":
case "System.UInt64": return($"cast({getExp(callExp.Arguments[0])} as number)");
case "System.Guid":
if (tsc.mapType == typeof(byte[]))
{
return($"hextoraw({getExp(callExp.Arguments[0])})");
}
return($"to_char({getExp(callExp.Arguments[0])})");
}
return(null);
case "NewGuid":
return(null);
case "Next":
if (callExp.Object?.Type == typeof(Random))
{
return("cast(dbms_random.value*1000000000 as smallint)");
}
return(null);
case "NextDouble":
if (callExp.Object?.Type == typeof(Random))
{
return("dbms_random.value");
}
return(null);
case "Random":
if (callExp.Method.DeclaringType.IsNumberType())
{
return("dbms_random.value");
}
return(null);
case "ToString":
if (callExp.Object != null)
{
return(callExp.Arguments.Count == 0 ? $"to_char({getExp(callExp.Object)})" : null);
}
return(null);
}
var objExp = callExp.Object;
var objType = objExp?.Type;
if (objType?.FullName == "System.Byte[]")
{
return(null);
}
var argIndex = 0;
if (objType == null && callExp.Method.DeclaringType == typeof(Enumerable))
{
objExp = callExp.Arguments.FirstOrDefault();
objType = objExp?.Type;
argIndex++;
if (objType == typeof(string))
{
switch (callExp.Method.Name)
{
case "First":
case "FirstOrDefault":
return($"substr({getExp(callExp.Arguments[0])}, 1, 1)");
}
}
}
if (objType == null)
{
objType = callExp.Method.DeclaringType;
}
if (objType != null || objType.IsArrayOrList())
{
if (argIndex >= callExp.Arguments.Count)
{
break;
}
tsc.SetMapColumnTmp(null);
var args1 = getExp(callExp.Arguments[argIndex]);
var oldMapType = tsc.SetMapTypeReturnOld(tsc.mapTypeTmp);
var oldDbParams = tsc.SetDbParamsReturnOld(null);
var left = objExp == null ? null : getExp(objExp);
tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
tsc.SetDbParamsReturnOld(oldDbParams);
switch (callExp.Method.Name)
{
case "Contains":
//判断 in //在各大 Provider AdoProvider 中已约定，500元素分割, 3空格\r\n4空格
return($"(({args1}) in {left.Replace(", \r\n \r\n", $") \r\n OR ({args1}) in (")})");
}
}
break;
case ExpressionType.NewArrayInit:
var arrExp = exp as NewArrayExpression;
var arrSb = new StringBuilder();
arrSb.Append("(");
for (var a = 0; a < arrExp.Expressions.Count; a++)
{
if (a > 0)
{
arrSb.Append(",");
}
if (a % 500 == 499)
{
arrSb.Append(" \r\n \r\n"); //500元素分割, 3空格\r\n4空格
}
arrSb.Append(getExp(arrExp.Expressions[a]));
}
if (arrSb.Length == 1)
{
arrSb.Append("NULL");
}
return(arrSb.Append(")").ToString());
case ExpressionType.ListInit:
var listExp = exp as ListInitExpression;
var listSb = new StringBuilder();
listSb.Append("(");
for (var a = 0; a < listExp.Initializers.Count; a++)
{
if (listExp.Initializers[a].Arguments.Any() == false)
{
continue;
}
if (a > 0)
{
listSb.Append(",");
}
listSb.Append(getExp(listExp.Initializers[a].Arguments.FirstOrDefault()));
}
if (listSb.Length == 1)
{
listSb.Append("NULL");
}
return(listSb.Append(")").ToString());
case ExpressionType.New:
var newExp = exp as NewExpression;
if (typeof(IList).IsAssignableFrom(newExp.Type))
{
if (newExp.Arguments.Count == 0)
{
return("(NULL)");
}
if (typeof(IEnumerable).IsAssignableFrom(newExp.Arguments[0].Type) == false)
{
return("(NULL)");
}
return(getExp(newExp.Arguments[0]));
}
return(null);
}
return(null);
}