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拆分 FreeSql 按需引用
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28810
498
Providers/FreeSql.Provider.PostgreSQL/PostgreSQLExpression.cs
Normal file
498
Providers/FreeSql.Provider.PostgreSQL/PostgreSQLExpression.cs
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@@ -0,0 +1,498 @@
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using FreeSql.Internal;
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using FreeSql.Internal.Model;
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using Newtonsoft.Json.Linq;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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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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namespace FreeSql.PostgreSQL {
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class PostgreSQLExpression : CommonExpression {
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public PostgreSQLExpression(CommonUtils common) : base(common) { }
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public override string ExpressionLambdaToSqlOther(Expression exp, ExpTSC tsc) {
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
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switch (exp.NodeType) {
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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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switch (exp.Type.NullableTypeOrThis().ToString()) {
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case "System.Boolean": return $"(({getExp(operandExp)})::varchar not in ('0','false','f','no'))";
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case "System.Byte": return $"({getExp(operandExp)})::int2";
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case "System.Char": return $"substr(({getExp(operandExp)})::char, 1, 1)";
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case "System.DateTime": return $"({getExp(operandExp)})::timestamp";
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case "System.Decimal": return $"({getExp(operandExp)})::numeric";
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case "System.Double": return $"({getExp(operandExp)})::float8";
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case "System.Int16": return $"({getExp(operandExp)})::int2";
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case "System.Int32": return $"({getExp(operandExp)})::int4";
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case "System.Int64": return $"({getExp(operandExp)})::int8";
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case "System.SByte": return $"({getExp(operandExp)})::int2";
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case "System.Single": return $"({getExp(operandExp)})::float4";
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case "System.String": return $"({getExp(operandExp)})::varchar";
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case "System.UInt16": return $"({getExp(operandExp)})::int2";
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case "System.UInt32": return $"({getExp(operandExp)})::int4";
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case "System.UInt64": return $"({getExp(operandExp)})::int8";
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case "System.Guid": return $"({getExp(operandExp)})::uuid";
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}
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}
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break;
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case ExpressionType.ArrayLength:
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var arrOperExp = getExp((exp as UnaryExpression).Operand);
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if (arrOperExp.StartsWith("(") || arrOperExp.EndsWith(")")) return $"array_length(array[{arrOperExp.TrimStart('(').TrimEnd(')')}],1)";
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return $"case when {arrOperExp} is null then 0 else array_length({arrOperExp},1) end";
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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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case "Parse":
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case "TryParse":
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switch (callExp.Method.DeclaringType.NullableTypeOrThis().ToString()) {
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case "System.Boolean": return $"(({getExp(callExp.Arguments[0])})::varchar not in ('0','false','f','no'))";
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case "System.Byte": return $"({getExp(callExp.Arguments[0])})::int2";
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case "System.Char": return $"substr(({getExp(callExp.Arguments[0])})::char, 1, 1)";
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case "System.DateTime": return $"({getExp(callExp.Arguments[0])})::timestamp";
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case "System.Decimal": return $"({getExp(callExp.Arguments[0])})::numeric";
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case "System.Double": return $"({getExp(callExp.Arguments[0])})::float8";
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case "System.Int16": return $"({getExp(callExp.Arguments[0])})::int2";
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case "System.Int32": return $"({getExp(callExp.Arguments[0])})::int4";
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case "System.Int64": return $"({getExp(callExp.Arguments[0])})::int8";
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case "System.SByte": return $"({getExp(callExp.Arguments[0])})::int2";
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case "System.Single": return $"({getExp(callExp.Arguments[0])})::float4";
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case "System.UInt16": return $"({getExp(callExp.Arguments[0])})::int2";
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case "System.UInt32": return $"({getExp(callExp.Arguments[0])})::int4";
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case "System.UInt64": return $"({getExp(callExp.Arguments[0])})::int8";
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case "System.Guid": return $"({getExp(callExp.Arguments[0])})::uuid";
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}
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break;
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case "NewGuid":
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break;
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case "Next":
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if (callExp.Object?.Type == typeof(Random)) return "(random()*1000000000)::int4";
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break;
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case "NextDouble":
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if (callExp.Object?.Type == typeof(Random)) return "random()";
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break;
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case "Random":
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if (callExp.Method.DeclaringType.IsNumberType()) return "random()";
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break;
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case "ToString":
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if (callExp.Object != null) return $"({getExp(callExp.Object)})::varchar";
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break;
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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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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.IsArray || typeof(IList).IsAssignableFrom(callExp.Method.DeclaringType)) {
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var left = objExp == null ? null : getExp(objExp);
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switch (objType.FullName) {
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case "Newtonsoft.Json.Linq.JToken":
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case "Newtonsoft.Json.Linq.JObject":
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case "Newtonsoft.Json.Linq.JArray":
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switch (callExp.Method.Name) {
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case "Any": return $"(jsonb_array_length(coalesce({left},'[]')) > 0)";
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case "Contains":
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var json = getExp(callExp.Arguments[argIndex]);
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if (objType == typeof(JArray))
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return $"(coalesce({left},'[]') ? ({json})::varchar)";
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if (json.StartsWith("'") && json.EndsWith("'"))
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return $"(coalesce({left},'{{}}') @> {_common.FormatSql("{0}", JToken.Parse(json.Trim('\'')))})";
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return $"(coalesce({left},'{{}}') @> ({json})::jsonb)";
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case "ContainsKey": return $"(coalesce({left},'{{}}') ? {getExp(callExp.Arguments[argIndex])})";
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case "Concat":
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var right2 = getExp(callExp.Arguments[argIndex]);
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return $"(coalesce({left},'{{}}') || {right2})";
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case "LongCount":
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case "Count": return $"jsonb_array_length(coalesce({left},'[]'))";
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case "Parse":
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var json2 = getExp(callExp.Arguments[argIndex]);
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if (json2.StartsWith("'") && json2.EndsWith("'")) return _common.FormatSql("{0}", JToken.Parse(json2.Trim('\'')));
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return $"({json2})::jsonb";
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}
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break;
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}
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if (objType.FullName == typeof(Dictionary<string, string>).FullName) {
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switch (callExp.Method.Name) {
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case "Contains":
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var right = getExp(callExp.Arguments[argIndex]);
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return $"({left} @> ({right}))";
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case "ContainsKey": return $"({left} ? {getExp(callExp.Arguments[argIndex])})";
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case "Concat": return $"({left} || {getExp(callExp.Arguments[argIndex])})";
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case "GetLength":
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case "GetLongLength":
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case "Count": return $"case when {left} is null then 0 else array_length(akeys({left}),1) end";
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case "Keys": return $"akeys({left})";
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case "Values": return $"avals({left})";
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}
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}
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switch (callExp.Method.Name) {
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case "Any":
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if (left.StartsWith("(") || left.EndsWith(")")) left = $"array[{left.TrimStart('(').TrimEnd(')')}]";
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return $"(case when {left} is null then 0 else array_length({left},1) end > 0)";
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case "Contains":
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//判断 in 或 array @> array
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var right1 = getExp(callExp.Arguments[argIndex]);
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if (left.StartsWith("array[") || left.EndsWith("]"))
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return $"{right1} in ({left.Substring(6, left.Length - 7)})";
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if (left.StartsWith("(") || left.EndsWith(")"))
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return $"{right1} in {left}";
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if (right1.StartsWith("(") || right1.EndsWith(")")) right1 = $"array[{right1.TrimStart('(').TrimEnd(')')}]";
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return $"({left} @> array[{right1}])";
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case "Concat":
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if (left.StartsWith("(") || left.EndsWith(")")) left = $"array[{left.TrimStart('(').TrimEnd(')')}]";
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var right2 = getExp(callExp.Arguments[argIndex]);
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if (right2.StartsWith("(") || right2.EndsWith(")")) right2 = $"array[{right2.TrimStart('(').TrimEnd(')')}]";
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return $"({left} || {right2})";
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case "GetLength":
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case "GetLongLength":
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case "Length":
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case "Count":
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if (left.StartsWith("(") || left.EndsWith(")")) left = $"array[{left.TrimStart('(').TrimEnd(')')}]";
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return $"case when {left} is null then 0 else array_length({left},1) end";
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}
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}
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break;
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case ExpressionType.MemberAccess:
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var memExp = exp as MemberExpression;
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var memParentExp = memExp.Expression?.Type;
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if (memParentExp?.FullName == "System.Byte[]") return null;
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if (memParentExp != null) {
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if (memParentExp.IsArray == true) {
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var left = getExp(memExp.Expression);
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if (left.StartsWith("(") || left.EndsWith(")")) left = $"array[{left.TrimStart('(').TrimEnd(')')}]";
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switch (memExp.Member.Name) {
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case "Length":
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case "Count": return $"case when {left} is null then 0 else array_length({left},1) end";
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}
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}
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switch (memParentExp.FullName) {
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case "Newtonsoft.Json.Linq.JToken":
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case "Newtonsoft.Json.Linq.JObject":
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case "Newtonsoft.Json.Linq.JArray":
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var left = getExp(memExp.Expression);
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switch (memExp.Member.Name) {
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case "Count": return $"jsonb_array_length(coalesce({left},'[]'))";
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}
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break;
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}
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if (memParentExp.FullName == typeof(Dictionary<string, string>).FullName) {
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var left = getExp(memExp.Expression);
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switch (memExp.Member.Name) {
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case "Count": return $"case when {left} is null then 0 else array_length(akeys({left}),1) end";
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case "Keys": return $"akeys({left})";
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case "Values": return $"avals({left})";
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}
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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("array[");
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for (var a = 0; a < arrExp.Expressions.Count; a++) {
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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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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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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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if (exp.Expression == null) {
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switch (exp.Member.Name) {
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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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case "Length": return $"char_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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if (exp.Expression == null) {
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switch (exp.Member.Name) {
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case "Now": return "current_timestamp";
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case "UtcNow": return "(current_timestamp at time zone 'UTC')";
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case "Today": return "current_date";
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case "MinValue": return "'0001/1/1 0:00:00'::timestamp";
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case "MaxValue": return "'9999/12/31 23:59:59'::timestamp";
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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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case "Date": return $"({left})::date";
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case "TimeOfDay": return $"(extract(epoch from ({left})::time)*1000000)";
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case "DayOfWeek": return $"extract(dow from ({left})::timestamp)";
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case "Day": return $"extract(day from ({left})::timestamp)";
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case "DayOfYear": return $"extract(doy from ({left})::timestamp)";
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case "Month": return $"extract(month from ({left})::timestamp)";
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case "Year": return $"extract(year from ({left})::timestamp)";
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case "Hour": return $"extract(hour from ({left})::timestamp)";
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case "Minute": return $"extract(minute from ({left})::timestamp)";
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case "Second": return $"extract(second from ({left})::timestamp)";
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case "Millisecond": return $"(extract(milliseconds from ({left})::timestamp)-extract(second from ({left})::timestamp)*1000)";
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case "Ticks": return $"(extract(epoch from ({left})::timestamp)*10000000+621355968000000000)";
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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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if (exp.Expression == null) {
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switch (exp.Member.Name) {
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case "Zero": return "0";
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case "MinValue": return "-922337203685477580"; //微秒 Ticks / 10
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case "MaxValue": return "922337203685477580";
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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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case "Days": return $"floor(({left})/{(long)1000000 * 60 * 60 * 24})";
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case "Hours": return $"floor(({left})/{(long)1000000 * 60 * 60}%24)";
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case "Milliseconds": return $"(floor(({left})/1000)::int8%1000)";
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case "Minutes": return $"(floor(({left})/{(long)1000000 * 60})::int8%60)";
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case "Seconds": return $"(floor(({left})/1000000)::int8%60)";
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case "Ticks": return $"(({left})*10)";
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case "TotalDays": return $"(({left})/{(long)1000000 * 60 * 60 * 24})";
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case "TotalHours": return $"(({left})/{(long)1000000 * 60 * 60})";
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case "TotalMilliseconds": return $"(({left})/1000)";
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case "TotalMinutes": return $"(({left})/{(long)1000000 * 60})";
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case "TotalSeconds": return $"(({left})/1000000)";
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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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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
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if (exp.Object == null) {
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switch (exp.Method.Name) {
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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 "Concat":
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return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), null);
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}
|
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} else {
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var left = getExp(exp.Object);
|
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switch (exp.Method.Name) {
|
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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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var likeOpt = "LIKE";
|
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if (exp.Arguments.Count > 1) {
|
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if (exp.Arguments[1].Type == typeof(bool) ||
|
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exp.Arguments[1].Type == typeof(StringComparison) && getExp(exp.Arguments[0]).Contains("IgnoreCase")) likeOpt = "ILIKE";
|
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}
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if (exp.Method.Name == "StartsWith") return $"({left}) {likeOpt} {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"(({args0Value})::varchar || '%')")}";
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if (exp.Method.Name == "EndsWith") return $"({left}) {likeOpt} {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%' || ({args0Value})::varchar)")}";
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if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) {likeOpt} {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
|
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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)";
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case "PadLeft":
|
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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 $"({left} = ({getExp(exp.Arguments[0])})::varchar)";
|
||||
}
|
||||
}
|
||||
throw new Exception($"PostgreSQLExpression 未实现函数表达式 {exp} 解析");
|
||||
}
|
||||
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 $"trunc({getExp(exp.Arguments[0])}, 0)";
|
||||
}
|
||||
throw new Exception($"PostgreSQLExpression 未实现函数表达式 {exp} 解析");
|
||||
}
|
||||
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} = ({getExp(exp.Arguments[0])})::timestamp)";
|
||||
case "CompareTo": return $"extract(epoch from ({left})::timestamp-({getExp(exp.Arguments[0])})::timestamp)";
|
||||
case "ToString": return $"to_char({left}, 'YYYY-MM-DD HH24:MI:SS.US')";
|
||||
}
|
||||
}
|
||||
throw new Exception($"PostgreSQLExpression 未实现函数表达式 {exp} 解析");
|
||||
}
|
||||
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} = {getExp(exp.Arguments[0])})";
|
||||
case "CompareTo": return $"({left}-({getExp(exp.Arguments[0])}))";
|
||||
case "ToString": return $"({left})::varchar";
|
||||
}
|
||||
}
|
||||
throw new Exception($"PostgreSQLExpression 未实现函数表达式 {exp} 解析");
|
||||
}
|
||||
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 $"({getExp(exp.Arguments[0])})::int8";
|
||||
}
|
||||
}
|
||||
throw new Exception($"PostgreSQLExpression 未实现函数表达式 {exp} 解析");
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user