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FreeSql/Providers/FreeSql.Provider.ShenTong/ShenTongExpression.cs
tk 013f35e296 initial commit
2024-11-13 18:18:28 +08:00

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using FreeSql.Internal;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Text.RegularExpressions;
namespace FreeSql.ShenTong
{
class ShenTongExpression : CommonExpression
{
public ShenTongExpression(CommonUtils common) : base(common) { }
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;
var arrOperExp = getExp(arrOper);
if (arrOperExp.StartsWith("(") || arrOperExp.EndsWith(")")) return $"array_length(array[{arrOperExp.TrimStart('(').TrimEnd(')')}],1)";
//if (arrOper.Type == typeof(byte[])) return $"octet_length({getExp(arrOper)})"; #505
return $"case when {arrOperExp} is null then 0 else array_length({arrOperExp},1) end";
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)})::text not in ('0','false','f','no'))";
case "System.Byte": return $"({getExp(operandExp)})::int2";
case "System.Char": return $"substr(({getExp(operandExp)})::char, 1, 1)";
case "System.DateTime": return ExpressionConstDateTime(operandExp) ?? $"({getExp(operandExp)})::timestamp";
case "System.Decimal": return $"({getExp(operandExp)})::numeric";
case "System.Double": return $"({getExp(operandExp)})::float8";
case "System.Int16": return $"({getExp(operandExp)})::int2";
case "System.Int32": return $"({getExp(operandExp)})::int4";
case "System.Int64": return $"({getExp(operandExp)})::int8";
case "System.SByte": return $"({getExp(operandExp)})::int2";
case "System.Single": return $"({getExp(operandExp)})::float4";
case "System.String": return $"({getExp(operandExp)})::text";
case "System.UInt16": return $"({getExp(operandExp)})::int2";
case "System.UInt32": return $"({getExp(operandExp)})::int4";
case "System.UInt64": return $"({getExp(operandExp)})::int8";
case "System.Guid": return $"({getExp(operandExp)})::bpchar(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])})::text not in ('0','false','f','no'))";
case "System.Byte": return $"({getExp(callExp.Arguments[0])})::int2";
case "System.Char": return $"substr(({getExp(callExp.Arguments[0])})::char, 1, 1)";
case "System.DateTime": return ExpressionConstDateTime(callExp.Arguments[0]) ?? $"({getExp(callExp.Arguments[0])})::timestamp";
case "System.Decimal": return $"({getExp(callExp.Arguments[0])})::numeric";
case "System.Double": return $"({getExp(callExp.Arguments[0])})::float8";
case "System.Int16": return $"({getExp(callExp.Arguments[0])})::int2";
case "System.Int32": return $"({getExp(callExp.Arguments[0])})::int4";
case "System.Int64": return $"({getExp(callExp.Arguments[0])})::int8";
case "System.SByte": return $"({getExp(callExp.Arguments[0])})::int2";
case "System.Single": return $"({getExp(callExp.Arguments[0])})::float4";
case "System.UInt16": return $"({getExp(callExp.Arguments[0])})::int2";
case "System.UInt32": return $"({getExp(callExp.Arguments[0])})::int4";
case "System.UInt64": return $"({getExp(callExp.Arguments[0])})::int8";
case "System.Guid": return $"({getExp(callExp.Arguments[0])})::bpchar(36)";
}
break;
case "NewGuid":
return null;
case "Next":
if (callExp.Object?.Type == typeof(Random)) return "(random()*1000000000)::int8";
return null;
case "NextDouble":
if (callExp.Object?.Type == typeof(Random)) return "random()";
return null;
case "Random":
if (callExp.Method.DeclaringType.IsNumberType()) return "random()";
return null;
case "ToString":
if (callExp.Object != null)
{
if (callExp.Object.Type.NullableTypeOrThis().IsEnum)
{
tsc.SetMapColumnTmp(null);
var oldMapType = tsc.SetMapTypeReturnOld(typeof(string));
var enumStr = ExpressionLambdaToSql(callExp.Object, tsc);
tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
return enumStr;
}
var value = ExpressionGetValue(callExp.Object, out var success);
if (success) return formatSql(value, typeof(string), null, null);
return callExp.Arguments.Count == 0 ? $"({getExp(callExp.Object)})::text" : 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())
{
string left = null;
switch (callExp.Method.Name)
{
case "Any":
left = objExp == null ? null : getExp(objExp);
if (left.StartsWith("(") || left.EndsWith(")")) left = $"array[{left.TrimStart('(').TrimEnd(')')}]";
return $"(case when {left} is null then 0 else array_length({left},1) end > 0)";
case "Contains":
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;
left = objExp == null ? null : getExp(objExp);
tsc.isNotSetMapColumnTmp = false;
tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
if (oldDbParams != null) tsc.SetDbParamsReturnOld(oldDbParams);
//判断 in 或 array @> array
if (left.StartsWith("array[") && left.EndsWith("]"))
return $"({args1}) in ({left.Substring(6, left.Length - 7)})";
if (left.StartsWith("(") && left.EndsWith(")")) //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 (")})";
if (args1.StartsWith("(") && args1.EndsWith(")")) args1 = $"array[{args1.TrimStart('(').TrimEnd(')')}]";
else args1 = $"array[{args1}]";
if (objExp != null)
{
var dbinfo = _common._orm.CodeFirst.GetDbInfo(objExp.Type);
if (dbinfo != null) args1 = $"{args1}::{dbinfo.dbtype}";
}
return $"({left} @> {args1})";
case "Concat":
left = objExp == null ? null : getExp(objExp);
if (left.StartsWith("(") || left.EndsWith(")")) left = $"array[{left.TrimStart('(').TrimEnd(')')}]";
var right2 = getExp(callExp.Arguments[argIndex]);
if (right2.StartsWith("(") || right2.EndsWith(")")) right2 = $"array[{right2.TrimStart('(').TrimEnd(')')}]";
return $"({left} || {right2})";
case "GetLength":
case "GetLongLength":
case "Length":
case "Count":
left = objExp == null ? null : getExp(objExp);
if (left.StartsWith("(") || left.EndsWith(")")) left = $"array[{left.TrimStart('(').TrimEnd(')')}]";
return $"case when {left} is null then 0 else array_length({left},1) end";
}
}
break;
case ExpressionType.MemberAccess:
var memExp = exp as MemberExpression;
var memParentExp = memExp.Expression?.Type;
if (memParentExp?.FullName == "System.Byte[]") return null;
if (memParentExp != null)
{
if (memParentExp.IsArray == true)
{
var left = getExp(memExp.Expression);
if (left.StartsWith("(") || left.EndsWith(")")) left = $"array[{left.TrimStart('(').TrimEnd(')')}]";
switch (memExp.Member.Name)
{
case "Length":
case "Count": return $"case when {left} is null then 0 else array_length({left},1) end";
}
}
}
break;
case ExpressionType.NewArrayInit:
var arrExp = exp as NewArrayExpression;
var arrSb = new StringBuilder();
arrSb.Append("array[");
for (var a = 0; a < arrExp.Expressions.Count; a++)
{
if (a > 0) arrSb.Append(",");
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 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 "date_trunc('D',current_date)";
case "MinValue": return "'0001/1/1 0:00:00'::timestamp";
case "MaxValue": return "'9999/12/31 23:59:59'::timestamp";
}
return null;
}
var left = ExpressionLambdaToSql(exp.Expression, tsc);
switch (exp.Member.Name)
{
case "Date": return $"date_trunc('D',{left})";
case "TimeOfDay": return $"datediff('second',date_trunc('D',{left}),{left})";
case "DayOfWeek": return $"(dayofweek({left})-1)";
case "Day": return $"dayofmonth({left})";
case "DayOfYear": return $"dayofyear({left})";
case "Month": return $"month({left})";
case "Year": return $"year({left})";
case "Hour": return $"hour({left})";
case "Minute": return $"minute({left})";
case "Second": return $"second({left})";
case "Millisecond": return $"(datepart(millisecond,{left})-datepart(second,{left})*1000)";
case "Ticks": return $"(datediff('second','1970-1-1',{left})::int8*10000000+621355968000000000)";
}
return null;
}
public override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, ExpTSC tsc)
{
if (exp.Expression == null)
{
switch (exp.Member.Name)
{
case "Zero": return "0";
case "MinValue": return "-922337203685477580"; //微秒 Ticks / 10
case "MaxValue": return "922337203685477580";
}
return null;
}
var left = ExpressionLambdaToSql(exp.Expression, tsc);
switch (exp.Member.Name)
{
case "Days": return $"floor(({left})/{60 * 60 * 24})";
case "Hours": return $"floor(({left})/{60 * 60}%24)";
case "Milliseconds": return $"(({left})::int8*1000)";
case "Minutes": return $"floor(({left})/60%60)";
case "Seconds": return $"(({left})%60)";
case "Ticks": return $"(({left})::int8*10000000)";
case "TotalDays": return $"(({left})/{60 * 60 * 24})";
case "TotalHours": return $"(({left})/{60 * 60})";
case "TotalMilliseconds": return $"(({left})::int8*1000)";
case "TotalMinutes": return $"(({left})/60)";
case "TotalSeconds": return $"({left})";
}
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":
if (exp.Arguments.Count == 1 && exp.Arguments[0].NodeType == ExpressionType.NewArrayInit && exp.Arguments[0] is NewArrayExpression concatNewArrExp)
return _common.StringConcat(concatNewArrExp.Expressions.Select(a => getExp(a)).ToArray(), null);
return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), null);
case "Format":
if (exp.Arguments[0].NodeType != ExpressionType.Constant) throw new Exception(CoreStrings.Not_Implemented_Expression_ParameterUseConstant(exp,exp.Arguments[0]));
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": //未通用测试 #405
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 (args0Value.Contains("%"))
{
if (exp.Method.Name == "StartsWith") return $"strpos({left}, {args0Value}) = 1";
if (exp.Method.Name == "EndsWith") return $"strpos({left}, {args0Value}) = char_length({left})-char_length({args0Value})+1";
return $"strpos({left}, {args0Value}) > 0";
}
var likeOpt = "LIKE";
if (exp.Arguments.Count > 1)
{
if (exp.Arguments[1].Type == typeof(bool) ||
exp.Arguments[1].Type == typeof(StringComparison)) likeOpt = "ILIKE";
}
if (exp.Method.Name == "StartsWith") return $"({left}) {likeOpt} {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"(({args0Value})::text || '%')")}";
if (exp.Method.Name == "EndsWith") return $"({left}) {likeOpt} {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%' || ({args0Value})::text)")}";
if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) {likeOpt} {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
return $"({left}) {likeOpt} ('%' || ({args0Value})::text || '%')";
case "ToLower": return $"lower({left})";
case "ToUpper": return $"upper({left})";
case "Substring":
var substrArgs1 = getExp(exp.Arguments[0]);
if (long.TryParse(substrArgs1, out var testtrylng1)) substrArgs1 = (testtrylng1 + 1).ToString();
else substrArgs1 += "+1";
if (exp.Arguments.Count == 1) return $"substr({left}, {substrArgs1})";
return $"substr({left}, {substrArgs1}, {getExp(exp.Arguments[1])})";
case "IndexOf": return $"(strpos({left}, {getExp(exp.Arguments[0])})-1)";
case "PadLeft":
if (exp.Arguments.Count == 1) return $"lpad({left}, {getExp(exp.Arguments[0])})";
return $"lpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
case "PadRight":
if (exp.Arguments.Count == 1) return $"rpad({left}, {getExp(exp.Arguments[0])})";
return $"rpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
case "Trim":
case "TrimStart":
case "TrimEnd":
if (exp.Arguments.Count == 0)
{
if (exp.Method.Name == "Trim") return $"trim({left})";
if (exp.Method.Name == "TrimStart") return $"ltrim({left})";
if (exp.Method.Name == "TrimEnd") return $"rtrim({left})";
}
var trimArg1 = "";
var trimArg2 = "";
foreach (var argsTrim02 in exp.Arguments)
{
var argsTrim01s = new[] { argsTrim02 };
if (argsTrim02.NodeType == ExpressionType.NewArrayInit)
{
var arritem = argsTrim02 as NewArrayExpression;
argsTrim01s = arritem.Expressions.ToArray();
}
foreach (var argsTrim01 in argsTrim01s)
{
var trimChr = getExp(argsTrim01).Trim('\'');
if (trimChr.Length == 1) trimArg1 += trimChr;
else trimArg2 += $" || ({trimChr})";
}
}
if (exp.Method.Name == "Trim") left = $"trim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})";
if (exp.Method.Name == "TrimStart") left = $"ltrim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})";
if (exp.Method.Name == "TrimEnd") left = $"rtrim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})";
return left;
case "Replace": return $"replace({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
case "CompareTo": return $"case when {left} = {getExp(exp.Arguments[0])} then 0 when {left} > {getExp(exp.Arguments[0])} then 1 else -1 end";
case "Equals": return $"({left} = ({getExp(exp.Arguments[0])})::text)";
}
}
return null;
}
public override string ExpressionLambdaToSqlCallMath(MethodCallExpression exp, ExpTSC tsc)
{
Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
switch (exp.Method.Name)
{
case "Abs": return $"abs({getExp(exp.Arguments[0])})";
case "Sign": return $"sign({getExp(exp.Arguments[0])})";
case "Floor": return $"floor({getExp(exp.Arguments[0])})";
case "Ceiling": return $"ceiling({getExp(exp.Arguments[0])})";
case "Round":
if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") return $"round({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
return $"round({getExp(exp.Arguments[0])})";
case "Exp": return $"exp({getExp(exp.Arguments[0])})";
case "Log": return $"log({getExp(exp.Arguments[0])})";
case "Log10": return $"log10({getExp(exp.Arguments[0])})";
case "Pow": return $"pow({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
case "Sqrt": return $"sqrt({getExp(exp.Arguments[0])})";
case "Cos": return $"cos({getExp(exp.Arguments[0])})";
case "Sin": return $"sin({getExp(exp.Arguments[0])})";
case "Tan": return $"tan({getExp(exp.Arguments[0])})";
case "Acos": return $"acos({getExp(exp.Arguments[0])})";
case "Asin": return $"asin({getExp(exp.Arguments[0])})";
case "Atan": return $"atan({getExp(exp.Arguments[0])})";
case "Atan2": return $"atan2({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
case "Truncate": return $"trunc({getExp(exp.Arguments[0])}, 0)";
}
return null;
}
public override string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, ExpTSC tsc)
{
Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
if (exp.Object == null)
{
switch (exp.Method.Name)
{
case "Compare": return $"({getExp(exp.Arguments[0])} - ({getExp(exp.Arguments[1])}))";
case "DaysInMonth": return $"dayofmonth(dateadd('day',-1,dateadd('month',1,({getExp(exp.Arguments[0])})::text||'-'||({getExp(exp.Arguments[1])})::text||'-1')))";
case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})";
case "IsLeapYear":
var isLeapYearArgs1 = getExp(exp.Arguments[0]);
return $"(({isLeapYearArgs1})%4=0 AND ({isLeapYearArgs1})%100<>0 OR ({isLeapYearArgs1})%400=0)";
case "Parse": return ExpressionConstDateTime(exp.Arguments[0]) ?? $"({getExp(exp.Arguments[0])})::timestamp";
case "ParseExact":
case "TryParse":
case "TryParseExact": return ExpressionConstDateTime(exp.Arguments[0]) ?? $"({getExp(exp.Arguments[0])})::timestamp";
}
}
else
{
var left = getExp(exp.Object);
var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]);
switch (exp.Method.Name)
{
case "Add": return $"dateadd('second',{args1},{left})";
case "AddDays": return $"dateadd('day',{args1},{left})";
case "AddHours": return $"dateadd('hour',{args1},{left})";
case "AddMilliseconds": return $"dateadd('second',({args1})/1000,{left})";
case "AddMinutes": return $"dateadd('minute',{args1},{left})";
case "AddMonths": return $"dateadd('month',{args1},{left})";
case "AddSeconds": return $"dateadd('second', {args1}, {left})";
case "AddTicks": return $"dateadd('second',({args1})/10000000,{left})";
case "AddYears": return $"dateadd('year',{args1},{left})";
case "Subtract":
switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GetGenericArguments().FirstOrDefault() : exp.Arguments[0].Type).FullName)
{
case "System.DateTime": return $"datediff('second',{args1},{left})";
case "System.TimeSpan": return $"dateadd('second',({args1})*-1,{left})";
}
break;
case "Equals": return $"({left} = {args1})";
case "CompareTo": return $"datediff('second',{args1},{left})";
case "ToString":
if (left.EndsWith("::timestamp") == false) left = $"({left})::timestamp";
if (exp.Arguments.Count == 0) return $"to_char({left},'YYYY-MM-DD HH24:MI:SS.US')";
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 "hh": return $"%_a4";
case "mm": return $"%_a5";
case "ss": return $"SS";
case "tt": return $"%_a6";
}
return m.Groups[0].Value;
});
var argsFinds = new[] { "YYYY", "YY", "%_a1", "%_a2", "%_a3", "%_a4", "%_a5", "SS", "%_a6" };
var argsSpts = Regex.Split(args1, "(M|d|H|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 "h": argsSpts[a] = $"case when substr(to_char({left},'HH12'),1,1) = '0' then substr(to_char({left},'HH12'),2,1) else to_char({left},'HH12') 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;
}
}
if (argsSpts.Length > 0) args1 = $"({string.Join(" || ", argsSpts.Where(a => a != "''"))})";
return args1.Replace("%_a1", "MM").Replace("%_a2", "DD").Replace("%_a3", "HH24").Replace("%_a4", "HH12").Replace("%_a5", "MI").Replace("%_a6", "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 $"({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])})*{60 * 60 * 24})";
case "FromHours": return $"(({getExp(exp.Arguments[0])})*{60 * 60})";
case "FromMilliseconds": return $"(({getExp(exp.Arguments[0])})/1000)";
case "FromMinutes": return $"(({getExp(exp.Arguments[0])})*60)";
case "FromSeconds": return $"({getExp(exp.Arguments[0])})";
case "FromTicks": return $"(({getExp(exp.Arguments[0])})/10000000)";
case "Parse": return $"({getExp(exp.Arguments[0])})::int8";
case "ParseExact":
case "TryParse":
case "TryParseExact": return $"({getExp(exp.Arguments[0])})::int8";
}
}
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 $"({left}-({args1}))";
case "ToString": return $"({left})::text";
}
}
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])})::text not in ('0','false','f','no'))";
case "ToByte": return $"({getExp(exp.Arguments[0])})::int2";
case "ToChar": return $"substr(({getExp(exp.Arguments[0])})::char, 1, 1)";
case "ToDateTime": return ExpressionConstDateTime(exp.Arguments[0]) ?? $"({getExp(exp.Arguments[0])})::timestamp";
case "ToDecimal": return $"({getExp(exp.Arguments[0])})::numeric";
case "ToDouble": return $"({getExp(exp.Arguments[0])})::float8";
case "ToInt16": return $"({getExp(exp.Arguments[0])})::int2";
case "ToInt32": return $"({getExp(exp.Arguments[0])})::int4";
case "ToInt64": return $"({getExp(exp.Arguments[0])})::int8";
case "ToSByte": return $"({getExp(exp.Arguments[0])})::int2";
case "ToSingle": return $"({getExp(exp.Arguments[0])})::float4";
case "ToString": return $"({getExp(exp.Arguments[0])})::text";
case "ToUInt16": return $"({getExp(exp.Arguments[0])})::int2";
case "ToUInt32": return $"({getExp(exp.Arguments[0])})::int4";
case "ToUInt64": return $"({getExp(exp.Arguments[0])})::int8";
}
}
return null;
}
}
}
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