mirror of
https://github.com/nsnail/FreeSql.git
synced 2025-04-25 04:02:51 +08:00
545 lines
32 KiB
C#
545 lines
32 KiB
C#
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.Odbc.PostgreSQL
|
|
{
|
|
class OdbcPostgreSQLExpression : CommonExpression
|
|
{
|
|
|
|
public OdbcPostgreSQLExpression(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.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)})::varchar 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 $"({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)})::varchar";
|
|
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)})::uuid";
|
|
}
|
|
}
|
|
break;
|
|
case ExpressionType.ArrayLength:
|
|
var arrOperExp = getExp((exp as UnaryExpression).Operand);
|
|
if (arrOperExp.StartsWith("(") || arrOperExp.EndsWith(")")) return $"array_length(array[{arrOperExp.TrimStart('(').TrimEnd(')')}],1)";
|
|
return $"case when {arrOperExp} is null then 0 else array_length({arrOperExp},1) end";
|
|
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])})::varchar 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 $"({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])})::uuid";
|
|
}
|
|
break;
|
|
case "NewGuid":
|
|
break;
|
|
case "Next":
|
|
if (callExp.Object?.Type == typeof(Random)) return "(random()*1000000000)::int4";
|
|
break;
|
|
case "NextDouble":
|
|
if (callExp.Object?.Type == typeof(Random)) return "random()";
|
|
break;
|
|
case "Random":
|
|
if (callExp.Method.DeclaringType.IsNumberType()) return "random()";
|
|
break;
|
|
case "ToString":
|
|
if (callExp.Object != null) return callExp.Arguments.Count == 0 ? $"({getExp(callExp.Object)})::varchar" : null;
|
|
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);
|
|
if (objType.FullName == typeof(Dictionary<string, string>).FullName)
|
|
{
|
|
switch (callExp.Method.Name)
|
|
{
|
|
case "Contains":
|
|
var right = getExp(callExp.Arguments[argIndex]);
|
|
return $"({left} @> ({right}))";
|
|
case "ContainsKey": return $"({left} ? {getExp(callExp.Arguments[argIndex])})";
|
|
case "Concat": return $"({left} || {getExp(callExp.Arguments[argIndex])})";
|
|
case "GetLength":
|
|
case "GetLongLength":
|
|
case "Count": return $"case when {left} is null then 0 else array_length(akeys({left}),1) end";
|
|
case "Keys": return $"akeys({left})";
|
|
case "Values": return $"avals({left})";
|
|
}
|
|
}
|
|
switch (callExp.Method.Name)
|
|
{
|
|
case "Any":
|
|
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":
|
|
//判断 in 或 array @> array
|
|
var right1 = getExp(callExp.Arguments[argIndex]);
|
|
if (left.StartsWith("array[") || left.EndsWith("]"))
|
|
return $"{right1} in ({left.Substring(6, left.Length - 7)})";
|
|
if (left.StartsWith("(") || left.EndsWith(")"))
|
|
return $"{right1} in {left}";
|
|
if (right1.StartsWith("(") || right1.EndsWith(")")) right1 = $"array[{right1.TrimStart('(').TrimEnd(')')}]";
|
|
right1 = $"array[{right1}]";
|
|
if (objExp != null)
|
|
{
|
|
var dbinfo = _common._orm.CodeFirst.GetDbInfo(objExp.Type);
|
|
if (dbinfo.HasValue) right1 = $"{right1}::{dbinfo.Value.dbtype}";
|
|
}
|
|
return $"({left} @> {right1})";
|
|
case "Concat":
|
|
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":
|
|
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";
|
|
}
|
|
}
|
|
switch (memParentExp.FullName)
|
|
{
|
|
case "Newtonsoft.Json.Linq.JToken":
|
|
case "Newtonsoft.Json.Linq.JObject":
|
|
case "Newtonsoft.Json.Linq.JArray":
|
|
var left = getExp(memExp.Expression);
|
|
switch (memExp.Member.Name)
|
|
{
|
|
case "Count": return $"jsonb_array_length(coalesce({left},'[]'))";
|
|
}
|
|
break;
|
|
}
|
|
if (memParentExp.FullName == typeof(Dictionary<string, string>).FullName)
|
|
{
|
|
var left = getExp(memExp.Expression);
|
|
switch (memExp.Member.Name)
|
|
{
|
|
case "Count": return $"case when {left} is null then 0 else array_length(akeys({left}),1) end";
|
|
case "Keys": return $"akeys({left})";
|
|
case "Values": return $"avals({left})";
|
|
}
|
|
}
|
|
}
|
|
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 "current_timestamp";
|
|
case "UtcNow": return "(current_timestamp at time zone 'UTC')";
|
|
case "Today": return "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 $"({left})::date";
|
|
case "TimeOfDay": return $"(extract(epoch from ({left})::time)*1000000)";
|
|
case "DayOfWeek": return $"extract(dow from ({left})::timestamp)";
|
|
case "Day": return $"extract(day from ({left})::timestamp)";
|
|
case "DayOfYear": return $"extract(doy from ({left})::timestamp)";
|
|
case "Month": return $"extract(month from ({left})::timestamp)";
|
|
case "Year": return $"extract(year from ({left})::timestamp)";
|
|
case "Hour": return $"extract(hour from ({left})::timestamp)";
|
|
case "Minute": return $"extract(minute from ({left})::timestamp)";
|
|
case "Second": return $"extract(second from ({left})::timestamp)";
|
|
case "Millisecond": return $"(extract(milliseconds from ({left})::timestamp)-extract(second from ({left})::timestamp)*1000)";
|
|
case "Ticks": return $"(extract(epoch from ({left})::timestamp)*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})/{(long)1000000 * 60 * 60 * 24})";
|
|
case "Hours": return $"floor(({left})/{(long)1000000 * 60 * 60}%24)";
|
|
case "Milliseconds": return $"(floor(({left})/1000)::int8%1000)";
|
|
case "Minutes": return $"(floor(({left})/{(long)1000000 * 60})::int8%60)";
|
|
case "Seconds": return $"(floor(({left})/1000000)::int8%60)";
|
|
case "Ticks": return $"(({left})*10)";
|
|
case "TotalDays": return $"(({left})/{(long)1000000 * 60 * 60 * 24})";
|
|
case "TotalHours": return $"(({left})/{(long)1000000 * 60 * 60})";
|
|
case "TotalMilliseconds": return $"(({left})/1000)";
|
|
case "TotalMinutes": return $"(({left})/{(long)1000000 * 60})";
|
|
case "TotalSeconds": return $"(({left})/1000000)";
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
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";
|
|
var likeOpt = "LIKE";
|
|
if (exp.Arguments.Count > 1)
|
|
{
|
|
if (exp.Arguments[1].Type == typeof(bool) ||
|
|
exp.Arguments[1].Type == typeof(StringComparison) && getExp(exp.Arguments[0]).Contains("IgnoreCase")) likeOpt = "ILIKE";
|
|
}
|
|
if (exp.Method.Name == "StartsWith") return $"({left}) {likeOpt} {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"(({args0Value})::varchar || '%')")}";
|
|
if (exp.Method.Name == "EndsWith") return $"({left}) {likeOpt} {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%' || ({args0Value})::varchar)")}";
|
|
if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) {likeOpt} {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
|
|
return $"({left}) {likeOpt} ('%' || ({args0Value})::varchar || '%')";
|
|
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])})::varchar)";
|
|
}
|
|
}
|
|
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 $"extract(epoch from ({getExp(exp.Arguments[0])})::timestamp-({getExp(exp.Arguments[1])})::timestamp)";
|
|
case "DaysInMonth": return $"extract(day from ({getExp(exp.Arguments[0])} || '-' || {getExp(exp.Arguments[1])} || '-01')::timestamp+'1 month'::interval-'1 day'::interval)";
|
|
case "Equals": return $"(({getExp(exp.Arguments[0])})::timestamp = ({getExp(exp.Arguments[1])})::timestamp)";
|
|
|
|
case "IsLeapYear":
|
|
var isLeapYearArgs1 = getExp(exp.Arguments[0]);
|
|
return $"(({isLeapYearArgs1})::int8%4=0 AND ({isLeapYearArgs1})::int8%100<>0 OR ({isLeapYearArgs1})::int8%400=0)";
|
|
|
|
case "Parse": return $"({getExp(exp.Arguments[0])})::timestamp";
|
|
case "ParseExact":
|
|
case "TryParse":
|
|
case "TryParseExact": return $"({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 $"(({left})::timestamp+(({args1})||' microseconds')::interval)";
|
|
case "AddDays": return $"(({left})::timestamp+(({args1})||' day')::interval)";
|
|
case "AddHours": return $"(({left})::timestamp+(({args1})||' hour')::interval)";
|
|
case "AddMilliseconds": return $"(({left})::timestamp+(({args1})||' milliseconds')::interval)";
|
|
case "AddMinutes": return $"(({left})::timestamp+(({args1})||' minute')::interval)";
|
|
case "AddMonths": return $"(({left})::timestamp+(({args1})||' month')::interval)";
|
|
case "AddSeconds": return $"(({left})::timestamp+(({args1})||' second')::interval)";
|
|
case "AddTicks": return $"(({left})::timestamp+(({args1})/10||' microseconds')::interval)";
|
|
case "AddYears": return $"(({left})::timestamp+(({args1})||' year')::interval)";
|
|
case "Subtract":
|
|
switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault() : exp.Arguments[0].Type).FullName)
|
|
{
|
|
case "System.DateTime": return $"(extract(epoch from ({left})::timestamp-({args1})::timestamp)*1000000)";
|
|
case "System.TimeSpan": return $"(({left})::timestamp-(({args1})||' microseconds')::interval)";
|
|
}
|
|
break;
|
|
case "Equals": return $"({left} = ({args1})::timestamp)";
|
|
case "CompareTo": return $"extract(epoch from ({left})::timestamp-({args1})::timestamp)";
|
|
case "ToString": return exp.Arguments.Count == 0 ? $"to_char({left}, 'YYYY-MM-DD HH24:MI:SS.US')" : null;
|
|
}
|
|
}
|
|
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])})*{(long)1000000 * 60 * 60 * 24})";
|
|
case "FromHours": return $"(({getExp(exp.Arguments[0])})*{(long)1000000 * 60 * 60})";
|
|
case "FromMilliseconds": return $"(({getExp(exp.Arguments[0])})*1000)";
|
|
case "FromMinutes": return $"(({getExp(exp.Arguments[0])})*{(long)1000000 * 60})";
|
|
case "FromSeconds": return $"(({getExp(exp.Arguments[0])})*1000000)";
|
|
case "FromTicks": return $"(({getExp(exp.Arguments[0])})/10)";
|
|
case "Parse": return $"({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})::varchar";
|
|
}
|
|
}
|
|
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])})::varchar 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 $"({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])})::varchar";
|
|
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;
|
|
}
|
|
}
|
|
}
|