98 lines
3.5 KiB
C#
98 lines
3.5 KiB
C#
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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namespace SqlSugar
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{
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public partial class SqliteQueryBuilder : QueryBuilder
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{
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#region Sql Template
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public override string PageTempalte
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{
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get
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{
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/*
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SELECT * FROM TABLE WHERE CONDITION ORDER BY ID DESC LIMIT 0,10
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*/
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var template = "SELECT {0} FROM {1} {2} {3} {4} LIMIT {5},{6}";
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return template;
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}
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}
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public override string DefaultOrderByTemplate
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{
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get
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{
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return "ORDER BY DATETIME('now') ";
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}
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}
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#endregion
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#region Common Methods
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public override bool IsComplexModel(string sql)
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{
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return Regex.IsMatch(sql, @"AS \`\w+\.\w+\`");
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}
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public override string ToSqlString()
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{
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base.AppendFilter();
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string result = null;
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string oldOrderBy = this.OrderByValue;
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sql = new StringBuilder();
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sql.AppendFormat(SqlTemplate, GetSelectValue, GetTableNameString, GetWhereValueString, GetGroupByString + HavingInfos, (Skip != null || Take != null) ? null : GetOrderByString);
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if (IsCount) { return sql.ToString(); }
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if (Skip != null && Take == null)
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{
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if (this.OrderByValue == "ORDER BY ") this.OrderByValue += GetSelectValue.Split(',')[0];
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result= string.Format(PageTempalte, GetSelectValue, GetTableNameString, GetWhereValueString, GetGroupByString + HavingInfos, (Skip != null || Take != null) ? null : GetOrderByString, Skip.ObjToInt(), long.MaxValue);
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}
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else if (Skip == null && Take != null)
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{
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if (this.OrderByValue == "ORDER BY ") this.OrderByValue += GetSelectValue.Split(',')[0];
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result= string.Format(PageTempalte, GetSelectValue, GetTableNameString, GetWhereValueString, GetGroupByString + HavingInfos, GetOrderByString, 0, Take.ObjToInt());
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}
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else if (Skip != null && Take != null)
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{
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if (this.OrderByValue == "ORDER BY ") this.OrderByValue += GetSelectValue.Split(',')[0];
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result= string.Format(PageTempalte, GetSelectValue, GetTableNameString, GetWhereValueString, GetGroupByString + HavingInfos, GetOrderByString, Skip.ObjToInt() > 0 ? Skip.ObjToInt(): 0, Take);
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}
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else
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{
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result= sql.ToString();
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}
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this.OrderByValue = oldOrderBy;
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return result;
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}
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#endregion
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#region Get SQL Partial
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public override string GetSelectValue
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{
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get
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{
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string reval = string.Empty;
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if (this.SelectValue == null || this.SelectValue is string)
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{
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reval = GetSelectValueByString();
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}
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else
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{
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reval = GetSelectValueByExpression();
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}
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if (this.SelectType == ResolveExpressType.SelectMultiple)
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{
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this.SelectCacheKey = this.SelectCacheKey + string.Join("-", this.JoinQueryInfos.Select(it => it.TableName));
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}
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if (IsDistinct)
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{
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reval = " DISTINCT " + reval;
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}
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return reval;
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}
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}
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#endregion
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}
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}
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