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FreeSql/FreeSql/Oracle/OracleExpression.cs
28810 5d734052df - 优化 实体数据属性 DbDefaultValue 处理； 
- 修复 Expression 表达式解析 Convert 的判断 bug；
2019-05-24 18:11:27 +08:00

400 lines
20 KiB
C#
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using FreeSql.Internal;
using FreeSql.Internal.Model;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
namespace FreeSql.Oracle {
class OracleExpression : CommonExpression {
public OracleExpression(CommonUtils common) : base(common) { }
internal override string ExpressionLambdaToSqlOther(Expression exp, ExpTSC tsc) {
Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
switch (exp.NodeType) {
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": return $"substr(to_char({getExp(operandExp)}), 1, 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 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": return $"substr(to_char({getExp(callExp.Arguments[0])}), 1, 36)";
}
break;
case "NewGuid":
break;
case "Next":
if (callExp.Object?.Type == typeof(Random)) return "cast(dbms_random.value*1000000000 as smallint)";
break;
case "NextDouble":
if (callExp.Object?.Type == typeof(Random)) return "dbms_random.value";
break;
case "Random":
if (callExp.Method.DeclaringType.IsNumberType()) return "dbms_random.value";
break;
case "ToString":
if (callExp.Object != null) return $"to_char({getExp(callExp.Object)})";
break;
}
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.IsArray || typeof(IList).IsAssignableFrom(callExp.Method.DeclaringType)) {
var left = objExp == null ? null : getExp(objExp);
switch (callExp.Method.Name) {
case "Contains":
//判断 in
return $"({getExp(callExp.Arguments[argIndex])}) in {left}";
}
}
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(",");
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;
}
internal 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 $"length({left})";
}
return null;
}
internal override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, ExpTSC tsc) {
if (exp.Expression == null) {
switch (exp.Member.Name) {
case "Now": return "systimestamp";
case "UtcNow": return "sys_extract_utc(systimestamp)";
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})='7' then 0 else cast(to_char({left}) 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;
}
internal 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})),2,3) 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;
}
internal 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 "Concat":
return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), null);
}
} 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})||'%')";
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":
var indexOfFindStr = getExp(exp.Arguments[0]);
if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") {
var locateArgs1 = getExp(exp.Arguments[1]);
if (long.TryParse(locateArgs1, out var testtrylng2)) locateArgs1 = (testtrylng2 + 1).ToString();
else locateArgs1 += "+1";
return $"(instr({left}, {indexOfFindStr}, {locateArgs1}, 1)-1)";
}
return $"(instr({left}, {indexOfFindStr}, 1, 1))-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})";
}
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) {
if (exp.Method.Name == "Trim") left = $"trim(both {getExp(argsTrim01)} from {left})";
if (exp.Method.Name == "TrimStart") left = $"ltrim({left},{getExp(argsTrim01)})";
if (exp.Method.Name == "TrimEnd") left = $"rtrim({left},{getExp(argsTrim01)})";
}
}
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 $"({left} = {getExp(exp.Arguments[0])})";
}
}
throw new Exception($"OracleExpression 未实现函数表达式 {exp} 解析");
}
internal 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 $"ceil({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": if (exp.Arguments.Count > 1) return $"log({getExp(exp.Arguments[1])},{getExp(exp.Arguments[0])})";
return $"log(2.7182818284590451,{getExp(exp.Arguments[0])})";
case "Log10": return $"log(10,{getExp(exp.Arguments[0])})";
case "Pow": return $"power({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 $"trunc({getExp(exp.Arguments[0])}, 0)";
}
throw new Exception($"OracleExpression 未实现函数表达式 {exp} 解析");
}
internal 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 $"extract(day from ({getExp(exp.Arguments[0])}-({getExp(exp.Arguments[1])})))";
case "DaysInMonth": return $"cast(to_char(last_day(({getExp(exp.Arguments[0])})||'-'||({getExp(exp.Arguments[1])})||'-01'),'DD') as number)";
case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})";
case "IsLeapYear":
var isLeapYearArgs1 = getExp(exp.Arguments[0]);
return $"(mod({isLeapYearArgs1},4)=0 AND mod({isLeapYearArgs1},100)<>0 OR mod({isLeapYearArgs1},400)=0)";
case "Parse": return $"to_timestamp({getExp(exp.Arguments[0])},'YYYY-MM-DD HH24:MI:SS.FF6')";
case "ParseExact":
case "TryParse":
case "TryParseExact": return $"to_timestamp({getExp(exp.Arguments[0])},'YYYY-MM-DD HH24:MI:SS.FF6')";
}
} 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.GenericTypeArguments.FirstOrDefault() : exp.Arguments[0].Type).FullName) {
case "System.DateTime": return $"({args1}-{left})";
case "System.TimeSpan": return $"({left}-{args1})";
}
break;
case "Equals": return $"({left} = {getExp(exp.Arguments[0])})";
case "CompareTo": return $"extract(day from ({left}-({getExp(exp.Arguments[0])})))";
case "ToString": return $"to_char({left},'YYYY-MM-DD HH24:MI:SS.FF6')";
}
}
throw new Exception($"OracleExpression 未实现函数表达式 {exp} 解析");
}
internal 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(7))";
case "ParseExact":
case "TryParse":
case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as interval day(9) to second(7))";
}
} 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 $"extract(day from ({left}-({getExp(exp.Arguments[0])})))";
case "ToString": return $"to_char({left})";
}
}
throw new Exception($"OracleExpression 未实现函数表达式 {exp} 解析");
}
internal 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 $"cast({getExp(exp.Arguments[0])} as number)";
}
}
throw new Exception($"OracleExpression 未实现函数表达式 {exp} 解析");
}
}
}
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