mirror of
https://github.com/nsnail/FreeSql.git
synced 2025-04-22 18:52:50 +08:00
342 lines
18 KiB
C#
342 lines
18 KiB
C#
using FreeSql.Internal;
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using FreeSql.Internal.Model;
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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.Sqlite {
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class SqliteExpression : CommonExpression {
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public SqliteExpression(CommonUtils common) : base(common) { }
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internal override string ExpressionLambdaToSqlOther(Expression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.NodeType) {
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case ExpressionType.Call:
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var callExp = exp as MethodCallExpression;
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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) {
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var left = objExp == null ? null : getExp(objExp);
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if (objType.IsArray || typeof(IList).IsAssignableFrom(callExp.Method.DeclaringType)) {
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switch (callExp.Method.Name) {
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case "Contains":
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//判断 in
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return $"({getExp(callExp.Arguments[argIndex])}) in {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("(");
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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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internal override string ExpressionLambdaToSqlMemberAccessString(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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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, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Member.Name) {
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case "Length": return $"length({left})";
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}
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return null;
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}
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internal override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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if (exp.Expression == null) {
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switch (exp.Member.Name) {
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case "Now": return "datetime(current_timestamp,'localtime')";
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case "UtcNow": return "current_timestamp";
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case "Today": return "date(current_timestamp,'localtime')";
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case "MinValue": return "datetime('0001-01-01 00:00:00.000')";
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case "MaxValue": return "datetime('9999-12-31 23:59:59.999')";
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}
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return null;
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}
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var left = ExpressionLambdaToSql(exp.Expression, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Member.Name) {
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case "Date": return $"date({left})";
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case "TimeOfDay": return $"strftime('%s',{left})";
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case "DayOfWeek": return $"strftime('%w',{left})";
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case "Day": return $"strftime('%d',{left})";
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case "DayOfYear": return $"strftime('%j',{left})";
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case "Month": return $"strftime('%m',{left})";
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case "Year": return $"strftime('%Y',{left})";
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case "Hour": return $"strftime('%H',{left})";
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case "Minute": return $"strftime('%M',{left})";
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case "Second": return $"strftime('%S',{left})";
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case "Millisecond": return $"(strftime('%f',{left})-strftime('%S',{left}))";
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case "Ticks": return $"(strftime('%s',{left})*10000000+621355968000000000)";
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}
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return null;
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}
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internal override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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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 "-922337203685.477580"; //秒 Ticks / 1000,000,0
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case "MaxValue": return "922337203685.477580";
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}
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return null;
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}
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var left = ExpressionLambdaToSql(exp.Expression, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Member.Name) {
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case "Days": return $"floor(({left})/{60 * 60 * 24})";
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case "Hours": return $"floor(({left})/{60 * 60}%24)";
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case "Milliseconds": return $"(cast({left} as bigint)*1000)";
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case "Minutes": return $"floor(({left})/60%60)";
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case "Seconds": return $"(({left})%60)";
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case "Ticks": return $"(cast({left} as bigint)*10000000)";
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case "TotalDays": return $"(({left})/{60 * 60 * 24})";
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case "TotalHours": return $"(({left})/{60 * 60})";
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case "TotalMilliseconds": return $"(cast({left} as bigint)*1000)";
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case "TotalMinutes": return $"(({left})/60)";
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case "TotalSeconds": return $"({left})";
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}
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return null;
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}
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internal override string ExpressionLambdaToSqlCallString(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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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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}
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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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if (exp.Method.Name == "StartsWith") return $"({left}) LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"({args0Value})||'%'")}";
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if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"'%'||({args0Value})")}";
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if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
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return $"({left}) LIKE '%'||({args0Value})||'%'";
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case "ToLower": return $"lower({left})";
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case "ToUpper": return $"upper({left})";
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case "Substring":
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var substrArgs1 = getExp(exp.Arguments[0]);
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if (long.TryParse(substrArgs1, out var testtrylng1)) substrArgs1 = (testtrylng1 + 1).ToString();
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else substrArgs1 += "+1";
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if (exp.Arguments.Count == 1) return $"substr({left}, {substrArgs1})";
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return $"substr({left}, {substrArgs1}, {getExp(exp.Arguments[1])})";
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case "IndexOf":
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var indexOfFindStr = getExp(exp.Arguments[0]);
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//if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") {
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// var locateArgs1 = getExp(exp.Arguments[1]);
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// if (long.TryParse(locateArgs1, out var testtrylng2)) locateArgs1 = (testtrylng2 + 1).ToString();
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// else locateArgs1 += "+1";
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// return $"(instr({left}, {indexOfFindStr}, {locateArgs1})-1)";
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//}
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return $"(instr({left}, {indexOfFindStr})-1)";
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case "PadLeft":
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if (exp.Arguments.Count == 1) return $"lpad({left}, {getExp(exp.Arguments[0])})";
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return $"lpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "PadRight":
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if (exp.Arguments.Count == 1) return $"rpad({left}, {getExp(exp.Arguments[0])})";
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return $"rpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "Trim":
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case "TrimStart":
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case "TrimEnd":
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if (exp.Arguments.Count == 0) {
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if (exp.Method.Name == "Trim") return $"trim({left})";
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if (exp.Method.Name == "TrimStart") return $"ltrim({left})";
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if (exp.Method.Name == "TrimEnd") return $"rtrim({left})";
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}
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var trimArg1 = "";
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var trimArg2 = "";
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foreach (var argsTrim02 in exp.Arguments) {
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var argsTrim01s = new[] { argsTrim02 };
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if (argsTrim02.NodeType == ExpressionType.NewArrayInit) {
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var arritem = argsTrim02 as NewArrayExpression;
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argsTrim01s = arritem.Expressions.ToArray();
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}
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foreach (var argsTrim01 in argsTrim01s) {
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var trimChr = getExp(argsTrim01).Trim('\'');
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if (trimChr.Length == 1) trimArg1 += trimChr;
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else trimArg2 += $" || ({trimChr})";
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}
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}
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if (exp.Method.Name == "Trim") left = $"trim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})";
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if (exp.Method.Name == "TrimStart") left = $"ltrim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})";
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if (exp.Method.Name == "TrimEnd") left = $"rtrim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})";
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return left;
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case "Replace": return $"replace({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "CompareTo": return $"case when {left} = {getExp(exp.Arguments[0])} then 0 when {left} > {getExp(exp.Arguments[0])} then 1 else -1 end";
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case "Equals": return $"({left} = {getExp(exp.Arguments[0])})";
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}
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}
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throw new Exception($"SqliteExpression 未实现函数表达式 {exp} 解析");
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}
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internal override string ExpressionLambdaToSqlCallMath(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Method.Name) {
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case "Abs": return $"abs({getExp(exp.Arguments[0])})";
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case "Sign": return $"sign({getExp(exp.Arguments[0])})";
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case "Floor": return $"floor({getExp(exp.Arguments[0])})";
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case "Ceiling": return $"ceiling({getExp(exp.Arguments[0])})";
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case "Round":
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if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") return $"round({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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return $"round({getExp(exp.Arguments[0])})";
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case "Exp": return $"exp({getExp(exp.Arguments[0])})";
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case "Log": return $"log({getExp(exp.Arguments[0])})";
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case "Log10": return $"log10({getExp(exp.Arguments[0])})";
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case "Pow": return $"power({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "Sqrt": return $"sqrt({getExp(exp.Arguments[0])})";
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case "Cos": return $"cos({getExp(exp.Arguments[0])})";
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case "Sin": return $"sin({getExp(exp.Arguments[0])})";
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case "Tan": return $"tan({getExp(exp.Arguments[0])})";
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case "Acos": return $"acos({getExp(exp.Arguments[0])})";
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case "Asin": return $"asin({getExp(exp.Arguments[0])})";
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case "Atan": return $"atan({getExp(exp.Arguments[0])})";
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case "Atan2": return $"atan2({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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//case "Truncate": return $"truncate({getExp(exp.Arguments[0])}, 0)";
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}
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throw new Exception($"SqliteExpression 未实现函数表达式 {exp} 解析");
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}
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internal override string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (exp.Object == null) {
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switch (exp.Method.Name) {
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case "Compare": return $"(strftime('%s',{getExp(exp.Arguments[0])}) -strftime('%s',{getExp(exp.Arguments[1])}))";
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case "DaysInMonth": return $"strftime('%d',date({getExp(exp.Arguments[0])}||'-01-01',{getExp(exp.Arguments[1])}||' months','-1 days'))";
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case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})";
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case "IsLeapYear":
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var isLeapYearArgs1 = getExp(exp.Arguments[0]);
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return $"(({isLeapYearArgs1})%4=0 AND ({isLeapYearArgs1})%100<>0 OR ({isLeapYearArgs1})%400=0)";
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case "Parse": return $"datetime({getExp(exp.Arguments[0])})";
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case "ParseExact":
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case "TryParse":
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case "TryParseExact": return $"datetime({getExp(exp.Arguments[0])})";
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}
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} else {
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var left = getExp(exp.Object);
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var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]);
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switch (exp.Method.Name) {
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case "Add": return $"datetime({left},({args1})||' seconds')";
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case "AddDays": return $"datetime({left},({args1})||' days')";
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case "AddHours": return $"datetime({left},({args1})||' hours')";
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case "AddMilliseconds": return $"datetime({left},(({args1})/1000)||' seconds')";
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case "AddMinutes": return $"datetime({left},({args1})||' seconds')";
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case "AddMonths": return $"datetime({left},({args1})||' months')";
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case "AddSeconds": return $"datetime({left},({args1})||' seconds')";
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case "AddTicks": return $"datetime({left},(({args1})/10000000)||' seconds')";
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case "AddYears": return $"datetime({left},({args1})||' years')";
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case "Subtract":
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switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault() : exp.Arguments[0].Type).FullName) {
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case "System.DateTime": return $"(strftime('%s',{left})-strftime('%s',{args1}))";
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case "System.TimeSpan": return $"datetime({left},(-{args1})||' seconds')";
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}
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break;
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case "Equals": return $"({left} = {getExp(exp.Arguments[0])})";
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case "CompareTo": return $"(strftime('%s',{left})-strftime('%s',{args1}))";
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case "ToString": return $"strftime('%Y-%m-%d %H:%M.%f',{left})";
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}
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}
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throw new Exception($"SqliteExpression 未实现函数表达式 {exp} 解析");
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}
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internal override string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (exp.Object == null) {
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switch (exp.Method.Name) {
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case "Compare": return $"({getExp(exp.Arguments[0])}-({getExp(exp.Arguments[1])}))";
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case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})";
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case "FromDays": return $"(({getExp(exp.Arguments[0])})*{60 * 60 * 24})";
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case "FromHours": return $"(({getExp(exp.Arguments[0])})*{60 * 60})";
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case "FromMilliseconds": return $"(({getExp(exp.Arguments[0])})/1000)";
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case "FromMinutes": return $"(({getExp(exp.Arguments[0])})*60)";
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case "FromSeconds": return $"(({getExp(exp.Arguments[0])}))";
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case "FromTicks": return $"(({getExp(exp.Arguments[0])})/10000000)";
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case "Parse": return $"cast({getExp(exp.Arguments[0])} as bigint)";
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case "ParseExact":
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case "TryParse":
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case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as bigint)";
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}
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} else {
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var left = getExp(exp.Object);
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var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]);
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switch (exp.Method.Name) {
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case "Add": return $"({left}+{args1})";
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case "Subtract": return $"({left}-({args1}))";
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case "Equals": return $"({left} = {getExp(exp.Arguments[0])})";
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case "CompareTo": return $"({left}-({getExp(exp.Arguments[0])}))";
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case "ToString": return $"cast({left} as character)";
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}
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}
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throw new Exception($"SqliteExpression 未实现函数表达式 {exp} 解析");
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}
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internal override string ExpressionLambdaToSqlCallConvert(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (exp.Object == null) {
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switch (exp.Method.Name) {
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case "ToBoolean": return $"({getExp(exp.Arguments[0])} not in ('0','false'))";
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case "ToByte": return $"cast({getExp(exp.Arguments[0])} as int2)";
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case "ToChar": return $"substr(cast({getExp(exp.Arguments[0])} as character), 1, 1)";
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case "ToDateTime": return $"datetime({getExp(exp.Arguments[0])})";
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case "ToDecimal": return $"cast({getExp(exp.Arguments[0])} as decimal(36,18))";
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case "ToDouble": return $"cast({getExp(exp.Arguments[0])} as double)";
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case "ToInt16":
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case "ToInt32":
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case "ToInt64":
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case "ToSByte": return $"cast({getExp(exp.Arguments[0])} as smallint)";
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case "ToSingle": return $"cast({getExp(exp.Arguments[0])} as float)";
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case "ToString": return $"cast({getExp(exp.Arguments[0])} as character)";
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case "ToUInt16": return $"cast({getExp(exp.Arguments[0])} as unsigned)";
|
|
case "ToUInt32": return $"cast({getExp(exp.Arguments[0])} as decimal(10,0))";
|
|
case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as decimal(21,0))";
|
|
}
|
|
}
|
|
throw new Exception($"SqliteExpression 未实现函数表达式 {exp} 解析");
|
|
}
|
|
}
|
|
}
|