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485 lines
20 KiB
C#
485 lines
20 KiB
C#
using FreeSql.DataAnnotations;
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using System;
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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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using System.Threading;
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using static FreeSql.SqlExtExtensions;
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[ExpressionCall]
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public static class FreeSqlGlobalExpressionCallExtensions
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{
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public static ThreadLocal<ExpressionCallContext> expContext = new ThreadLocal<ExpressionCallContext>();
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/// <summary>
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/// C#： that >= between && that <= and<para></para>
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/// SQL： that BETWEEN between AND and
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/// </summary>
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/// <param name="that"></param>
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/// <param name="between"></param>
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/// <param name="and"></param>
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/// <returns></returns>
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public static bool Between(this DateTime that, DateTime between, DateTime and)
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{
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if (expContext.IsValueCreated == false || expContext.Value == null || expContext.Value.ParsedContent == null)
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return that >= between && that <= and;
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expContext.Value.Result = $"{expContext.Value.ParsedContent["that"]} between {expContext.Value.ParsedContent["between"]} and {expContext.Value.ParsedContent["and"]}";
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return false;
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}
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/// <summary>
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/// 注意：这个方法和 Between 有细微区别<para></para>
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/// C#： that >= start && that < end<para></para>
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/// SQL： that >= start and that < end
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/// </summary>
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/// <param name="that"></param>
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/// <param name="start"></param>
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/// <param name="end"></param>
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/// <returns></returns>
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public static bool BetweenEnd(this DateTime that, DateTime start, DateTime end)
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{
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if (expContext.IsValueCreated == false || expContext.Value == null || expContext.Value.ParsedContent == null)
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return that >= start && that < end;
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expContext.Value.Result = $"{expContext.Value.ParsedContent["that"]} >= {expContext.Value.ParsedContent["start"]} and {expContext.Value.ParsedContent["that"]} < {expContext.Value.ParsedContent["end"]}";
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return false;
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}
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}
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namespace FreeSql
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{
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/// <summary>
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/// SqlExt 是利用自定表达式函数解析功能，解析默认常用的SQL函数，欢迎 PR
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/// </summary>
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[ExpressionCall]
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public static class SqlExt
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{
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internal static ThreadLocal<ExpressionCallContext> expContext = new ThreadLocal<ExpressionCallContext>();
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//public static bool BitAnd<TEnum>(TEnum enum1, [RawValue] TEnum enum2)
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//{
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// expContext.Value.Result = $"({expContext.Value.ParsedContent["enum1"]} & {Convert.ToInt32(enum2)}) = {Convert.ToInt32(enum2)}";
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// return false;
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//}
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//public static bool BitOr<TEnum>(TEnum enum1, [RawValue] TEnum enum2)
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//{
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// expContext.Value.Result = $"({expContext.Value.ParsedContent["enum1"]} | {Convert.ToInt32(enum2)}) = {Convert.ToInt32(enum2)}";
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// return false;
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//}
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#region SqlServer/PostgreSQL over
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/// <summary>
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/// rank() over(order by ...)
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/// </summary>
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/// <returns></returns>
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public static ISqlOver<long> Rank() => Over<long>("rank()");
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/// <summary>
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/// dense_rank() over(order by ...)
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/// </summary>
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/// <returns></returns>
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public static ISqlOver<long> DenseRank() => Over<long>("dense_rank()");
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/// <summary>
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/// count() over(order by ...)
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/// </summary>
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/// <returns></returns>
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public static ISqlOver<long> Count(object column) => Over<long>($"count({expContext.Value.ParsedContent["column"]})");
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/// <summary>
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/// sum(..) over(order by ...)
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/// </summary>
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/// <param name="column"></param>
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/// <returns></returns>
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public static ISqlOver<decimal> Sum(object column) => Over<decimal>($"sum({expContext.Value.ParsedContent["column"]})");
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/// <summary>
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/// avg(..) over(order by ...)
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/// </summary>
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/// <returns></returns>
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public static ISqlOver<decimal> Avg(object column) => Over<decimal>($"avg({expContext.Value.ParsedContent["column"]})");
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/// <summary>
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/// max(..) over(order by ...)
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="column"></param>
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/// <returns></returns>
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public static ISqlOver<T> Max<T>(T column) => Over<T>($"max({expContext.Value.ParsedContent["column"]})");
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/// <summary>
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/// min(..) over(order by ...)
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="column"></param>
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/// <returns></returns>
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public static ISqlOver<T> Min<T>(T column) => Over<T>($"min({expContext.Value.ParsedContent["column"]})");
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/// <summary>
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/// SqlServer row_number() over(order by ...)
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/// </summary>
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/// <returns></returns>
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public static ISqlOver<long> RowNumber() => Over<long>("row_number()");
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#endregion
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/// <summary>
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/// isnull、ifnull、coalesce、nvl
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/// </summary>
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/// <typeparam name="TValue"></typeparam>
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/// <param name="value"></param>
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/// <param name="defaultValue"></param>
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/// <returns></returns>
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public static TValue IsNull<TValue>(TValue value, TValue defaultValue)
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{
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expContext.Value.Result = expContext.Value._commonExp._common.IsNull(expContext.Value.ParsedContent["value"], expContext.Value.ParsedContent["defaultValue"]);
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return default(TValue);
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}
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/// <summary>
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/// count(distinct name)
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="column"></param>
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/// <returns></returns>
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public static long DistinctCount<T>(T column)
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{
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expContext.Value.Result = $"count(distinct {expContext.Value.ParsedContent["column"]})";
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return 0;
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}
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/// <summary>
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/// 注意：使用者自己承担【注入风险】
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/// </summary>
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/// <param name="sql"></param>
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/// <returns></returns>
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static bool InternalRawSql([RawValue] string sql)
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{
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expContext.Value.Result = sql;
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return false;
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}
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#region 大小判断
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/// <summary>
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/// 大于 >
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/// </summary>
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/// <returns></returns>
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public static bool GreaterThan<TValue>(TValue value1, TValue value2)
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{
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expContext.Value.Result = $"{expContext.Value.ParsedContent["value1"]} > {expContext.Value.ParsedContent["value2"]}";
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return false;
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}
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/// <summary>
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/// 大于或等于 >=
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/// </summary>
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/// <returns></returns>
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public static bool GreaterThanOrEqual<TValue>(TValue value1, TValue value2)
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{
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expContext.Value.Result = $"{expContext.Value.ParsedContent["value1"]} >= {expContext.Value.ParsedContent["value2"]}";
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return false;
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}
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/// <summary>
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/// 小于 <
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/// </summary>
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/// <returns></returns>
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public static bool LessThan<TValue>(TValue value1, TValue value2)
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{
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expContext.Value.Result = $"{expContext.Value.ParsedContent["value1"]} < {expContext.Value.ParsedContent["value2"]}";
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return false;
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}
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/// <summary>
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/// 小于或等于 <=
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/// </summary>
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/// <returns></returns>
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public static bool LessThanOrEqual<TValue>(TValue value1, TValue value2)
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{
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expContext.Value.Result = $"{expContext.Value.ParsedContent["value1"]} <= {expContext.Value.ParsedContent["value2"]}";
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return false;
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}
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#endregion
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/// <summary>
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/// case when .. then .. end
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/// </summary>
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/// <returns></returns>
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public static ICaseWhenEnd Case() => SqlExtExtensions.Case();
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/// <summary>
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/// case when .. then .. end
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/// </summary>
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/// <typeparam name="TInput"></typeparam>
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/// <typeparam name="TOutput"></typeparam>
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/// <param name="input"></param>
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/// <param name="dict"></param>
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/// <returns></returns>
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public static TOutput CaseDict<TInput, TOutput>(TInput input, [RawValue] Dictionary<TInput, TOutput> dict)
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{
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var ec = expContext.Value;
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var sb = new StringBuilder();
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sb.Append("case");
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foreach (var kv in dict)
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sb.Append(" when ").Append(ec.ParsedContent["input"]).Append(" = ").Append(ec.FormatSql(kv.Key))
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.Append(" then ").Append(ec.FormatSql(kv.Value));
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sb.Append(" end");
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ec.Result = sb.ToString();
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return default;
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}
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/// <summary>
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/// MySql group_concat(distinct .. order by .. separator ..)
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/// </summary>
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/// <param name="column"></param>
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/// <returns></returns>
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public static IGroupConcat GroupConcat(object column) => SqlExtExtensions.GroupConcat(column);
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/// <summary>
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/// MySql find_in_set(str, strlist)
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/// </summary>
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/// <typeparam name="TValue"></typeparam>
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/// <param name="str"></param>
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/// <param name="strlist"></param>
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/// <returns></returns>
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public static int FindInSet<TValue>(TValue str, string strlist)
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{
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expContext.Value.Result = $"find_in_set({expContext.Value.ParsedContent["str"]}, {expContext.Value.ParsedContent["strlist"]})";
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return 0;
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}
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/// <summary>
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/// PostgreSQL string_agg(.., ..)
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/// </summary>
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/// <param name="column"></param>
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/// <param name="delimiter"></param>
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/// <returns></returns>
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public static string StringAgg(object column, object delimiter)
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{
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expContext.Value.Result = $"string_agg({expContext.Value.ParsedContent["column"]}, {expContext.Value.ParsedContent["delimiter"]})";
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return "";
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}
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}
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[ExpressionCall]
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public static class SqlExtExtensions //这个类存在的意义，是不想使用者方法名污染
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{
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static ThreadLocal<ExpressionCallContext> expContextSelf = new ThreadLocal<ExpressionCallContext>();
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static ExpressionCallContext expContext => expContextSelf.Value ?? SqlExt.expContext.Value;
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internal static ThreadLocal<List<ExpSbInfo>> expSb = new ThreadLocal<List<ExpSbInfo>>();
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internal static ExpSbInfo expSbLast => expSb.Value.Last();
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internal class ExpSbInfo
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{
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public StringBuilder Sb { get; } = new StringBuilder();
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public bool IsOver = false;
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public bool IsOrderBy = false;
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public bool IsDistinct = false;
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}
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#region .. over([partition by ..] order by ...)
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internal static ISqlOver<TValue> Over<TValue>(string sqlFunc)
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{
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if (expSb.Value == null) expSb.Value = new List<ExpSbInfo>();
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expSb.Value.Add(new ExpSbInfo());
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expSbLast.Sb.Append(sqlFunc);
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return null;
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}
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public static ISqlOver<TValue> Over<TValue>(this ISqlOver<TValue> that)
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{
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expSbLast.Sb.Append(" over(");
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expSbLast.IsOver = true;
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return that;
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}
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public static ISqlOver<TValue> PartitionBy<TValue>(this ISqlOver<TValue> that, object column)
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{
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var sb = expSbLast.Sb;
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sb.Append(" partition by ");
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var exp = expContext.RawExpression["column"];
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if (exp.NodeType == ExpressionType.New)
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{
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var expNew = exp as NewExpression;
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for (var a = 0; a < expNew.Arguments.Count; a++)
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{
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if (a > 0) sb.Append(",");
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sb.Append(expContext.Utility.ParseExpression(expNew.Arguments[a]));
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}
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} else
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sb.Append(expContext.ParsedContent["column"]);
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return that;
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}
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public static ISqlOver<TValue> OrderBy<TValue>(this ISqlOver<TValue> that, object column) => OrderByPriv(that, false);
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public static ISqlOver<TValue> OrderByDescending<TValue>(this ISqlOver<TValue> that, object column) => OrderByPriv(that, true);
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static ISqlOver<TValue> OrderByPriv<TValue>(this ISqlOver<TValue> that, bool isDesc)
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{
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var sb = expSbLast.Sb;
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if (expSbLast.IsOrderBy == false)
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{
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sb.Append(" order by ");
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expSbLast.IsOrderBy = true;
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}
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var exp = expContext.RawExpression["column"];
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if (exp.NodeType == ExpressionType.New)
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{
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var expNew = exp as NewExpression;
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for (var a = 0; a < expNew.Arguments.Count; a++)
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{
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sb.Append(expContext.Utility.ParseExpression(expNew.Arguments[a]));
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if (isDesc) sb.Append(" desc");
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sb.Append(",");
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}
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}
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else
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{
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sb.Append(expContext.ParsedContent["column"]);
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if (isDesc) sb.Append(" desc");
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sb.Append(",");
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}
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return that;
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}
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public static TValue ToValue<TValue>(this ISqlOver<TValue> that)
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{
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var sql = expSbLast.Sb.ToString().TrimEnd(',');
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if (expSbLast.IsOver) sql = $"{sql})";
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expSbLast.Sb.Clear();
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expSb.Value.RemoveAt(expSb.Value.Count - 1);
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expContext.Result = sql;
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return default;
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}
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public interface ISqlOver<TValue> { }
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#endregion
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#region case when .. then .. when .. then .. end
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public static ICaseWhenEnd Case()
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{
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if (expSb.Value == null) expSb.Value = new List<ExpSbInfo>();
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expSb.Value.Add(new ExpSbInfo());
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expSbLast.Sb.Append("case ");
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return null;
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}
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public static ICaseWhenEnd<TValue> When<TValue>(this ICaseWhenEnd that, bool test, TValue then)
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{
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expSbLast.Sb.Append($"\r\n{"".PadRight(expSb.Value.Count * 2)}when ").Append(expContext.ParsedContent["test"]).Append(" then ").Append(expContext.ParsedContent["then"]);
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return null;
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}
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public static ICaseWhenEnd<TValue> When<TValue>(this ICaseWhenEnd<TValue> that, bool test, TValue then)
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{
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expSbLast.Sb.Append($"\r\n{"".PadRight(expSb.Value.Count * 2)}when ").Append(expContext.ParsedContent["test"]).Append(" then ").Append(expContext.ParsedContent["then"]);
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return null;
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}
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public static ICaseWhenEnd<TValue> Else<TValue>(this ICaseWhenEnd<TValue> that, TValue then)
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{
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expSbLast.Sb.Append($"\r\n{"".PadRight(expSb.Value.Count * 2)}else ").Append(expContext.ParsedContent["then"]);
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return null;
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}
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public static TValue End<TValue>(this ICaseWhenEnd<TValue> that)
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{
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var sql = expSbLast.Sb.Append($"\r\n{"".PadRight(expSb.Value.Count * 2 - 2)}end").ToString();
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expSbLast.Sb.Clear();
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expSb.Value.RemoveAt(expSb.Value.Count - 1);
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expContext.Result = sql;
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return default;
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}
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public interface ICaseWhenEnd { }
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public interface ICaseWhenEnd<TValue> { }
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#endregion
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#region group_concat
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public static IGroupConcat GroupConcat(object column)
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{
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if (expSb.Value == null) expSb.Value = new List<ExpSbInfo>();
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expSb.Value.Add(new ExpSbInfo());
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expSbLast.Sb.Append("group_concat(").Append(expContext.ParsedContent["column"]);
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return null;
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}
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public static IGroupConcat Distinct(this IGroupConcat that)
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{
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if (expSbLast.IsDistinct == false)
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{
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expSbLast.Sb.Insert(expSbLast.Sb.ToString().LastIndexOf("group_concat(") + 13, "distinct ");
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expSbLast.IsDistinct = true;
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}
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return that;
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}
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public static IGroupConcat Separator(this IGroupConcat that, object separator)
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{
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if (expSbLast.IsOrderBy) expSbLast.Sb.Remove(expSbLast.Sb.Length - 1, 1);
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expSbLast.Sb.Append(" separator ").Append(expContext.ParsedContent["separator"]);
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return that;
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}
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public static IGroupConcat OrderBy(this IGroupConcat that, object column) => OrderByPriv(that, false);
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public static IGroupConcat OrderByDescending(this IGroupConcat that, object column) => OrderByPriv(that, true);
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static IGroupConcat OrderByPriv(this IGroupConcat that, bool isDesc)
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{
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var sb = expSbLast.Sb;
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if (expSbLast.IsOrderBy == false)
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{
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sb.Append(" order by ");
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expSbLast.IsOrderBy = true;
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}
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var exp = expContext.RawExpression["column"];
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if (exp.NodeType == ExpressionType.New)
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{
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var expNew = exp as NewExpression;
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for (var a = 0; a < expNew.Arguments.Count; a++)
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{
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sb.Append(expContext.Utility.ParseExpression(expNew.Arguments[a]));
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if (isDesc) sb.Append(" desc");
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sb.Append(",");
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}
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}
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else
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{
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sb.Append(expContext.ParsedContent["column"]);
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if (isDesc) sb.Append(" desc");
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sb.Append(",");
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}
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return that;
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}
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public static string ToValue(this IGroupConcat that)
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{
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var sql = expSbLast.Sb.ToString().TrimEnd(',');
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expSbLast.Sb.Clear();
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expSb.Value.RemoveAt(expSb.Value.Count - 1);
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expContext.Result = $"{sql})";
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return default;
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}
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public interface IGroupConcat { }
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#endregion
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#region string.Join 反射处理，此块代码用于反射，所以别修改定义
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public static string StringJoinSqliteGroupConcat(object column, object delimiter)
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{
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expContext.Result = $"group_concat({expContext.ParsedContent["column"]},{expContext.ParsedContent["delimiter"]})";
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return null;
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}
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public static string StringJoinPgsqlGroupConcat(object column, object delimiter)
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{
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expContext.Result = $"string_agg(({expContext.ParsedContent["column"]})::text,{expContext.ParsedContent["delimiter"]})";
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return null;
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}
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public static string StringJoinMySqlGroupConcat(object column, object delimiter)
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{
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expContext.Result = $"group_concat({expContext.ParsedContent["column"]} separator {expContext.ParsedContent["delimiter"]})";
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return null;
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}
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public static string StringJoinOracleGroupConcat(object column, object delimiter)
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{
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string orderby = null;
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var subSelect = expContext._tsc?.subSelect001;
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if (subSelect != null)
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{
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orderby = subSelect?._orderby?.Trim('\r', '\n');
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if (string.IsNullOrEmpty(orderby))
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||
{
|
||
var subSelectTb1 = subSelect._tables.FirstOrDefault();
|
||
if (subSelectTb1 != null && subSelectTb1.Table.Primarys.Any() == true)
|
||
orderby = $"order by {string.Join(",", subSelectTb1.Table.Primarys.Select(a => $"{subSelectTb1.Alias}.{subSelect._commonUtils.QuoteSqlName(a.Attribute.Name)}"))}";
|
||
}
|
||
}
|
||
if (string.IsNullOrEmpty(orderby)) orderby = "order by 1";
|
||
expContext.Result = $"listagg(to_char({expContext.ParsedContent["column"]}),{expContext.ParsedContent["delimiter"]}) within group({orderby})";
|
||
return null;
|
||
}
|
||
public static string StringJoinFirebirdList(object column, object delimiter)
|
||
{
|
||
expContext.Result = $"list({expContext.ParsedContent["column"]},{expContext.ParsedContent["delimiter"]})";
|
||
return null;
|
||
}
|
||
public static string StringJoinGBaseWmConcatText(object column, object delimiter)
|
||
{
|
||
if (expContext.ParsedContent["delimiter"] == "','")
|
||
expContext.Result = $"wm_concat_text({expContext.ParsedContent["column"]})";
|
||
else
|
||
throw new NotImplementedException(CoreStrings.GBase_NotSupport_OtherThanCommas);
|
||
//expContext.Result = $"replace(wm_concat_text({expContext.ParsedContent["column"]}), ',', {expContext.ParsedContent["delimiter"]})";
|
||
return null;
|
||
}
|
||
#endregion
|
||
}
|
||
} |