- 增加 FreeSql.Provider.Dameng 基于 DmProvider Ado.net 访问达梦数据库；#155

2025-06-18 20:08:15 +08:00 · 2020-04-14 23:38:27 +08:00
parent 82b612bae6
commit 0ac564f801
58 changed files with 11337 additions and 76 deletions
--- a/Providers/FreeSql.Provider.Dameng/DamengUtils.cs
+++ b/Providers/FreeSql.Provider.Dameng/DamengUtils.cs
@ -0,0 +1,102 @@
+using Dm;
+using FreeSql.Internal;
+using FreeSql.Internal.Model;
+using System;
+using System.Collections.Generic;
+using System.Data.Common;
+
+namespace FreeSql.Dameng
+{
+
+    class DamengUtils : CommonUtils
+    {
+        public DamengUtils(IFreeSql orm) : base(orm)
+        {
+        }
+
+        public override DbParameter AppendParamter(List<DbParameter> _params, string parameterName, ColumnInfo col, Type type, object value)
+        {
+            if (string.IsNullOrEmpty(parameterName)) parameterName = $"p_{_params?.Count}";
+            var dbtype = (DmDbType)_orm.CodeFirst.GetDbInfo(type)?.type;
+            switch (dbtype)
+            {
+                case DmDbType.Bit:
+                    if (value == null) value = null;
+                    else value = (bool)value == true ? 1 : 0;
+                    dbtype = DmDbType.Int32;
+                    break;
+               
+                case DmDbType.Char:
+                case DmDbType.VarChar:
+                case DmDbType.Text:
+                    value = string.Concat(value);
+                    break;
+            }
+            var ret = new DmParameter { ParameterName = QuoteParamterName(parameterName), DmSqlType = dbtype, Value = value };
+            _params?.Add(ret);
+            return ret;
+        }
+
+        public override DbParameter[] GetDbParamtersByObject(string sql, object obj) =>
+            Utils.GetDbParamtersByObject<DmParameter>(sql, obj, null, (name, type, value) =>
+            {
+                var dbtype = (DmDbType)_orm.CodeFirst.GetDbInfo(type)?.type;
+                switch (dbtype)
+                {
+                    case DmDbType.Bit:
+                        if (value == null) value = null;
+                        else value = (bool)value == true ? 1 : 0;
+                        dbtype = DmDbType.Int32;
+                        break;
+
+                    case DmDbType.Char:
+                    case DmDbType.VarChar:
+                    case DmDbType.Text:
+                        value = string.Concat(value);
+                        break;
+                }
+                var ret = new DmParameter { ParameterName = $":{name}", DmSqlType = dbtype, Value = value };
+                return ret;
+            });
+
+        public override string FormatSql(string sql, params object[] args) => sql?.FormatDameng(args);
+        public override string QuoteSqlName(params string[] name)
+        {
+            if (name.Length == 1)
+            {
+                var nametrim = name[0].Trim();
+                if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
+                    return nametrim; //原生SQL
+                if (nametrim.StartsWith("\"") && nametrim.EndsWith("\""))
+                    return nametrim;
+                return $"\"{nametrim.Replace(".", "\".\"")}\"";
+            }
+            return $"\"{string.Join("\".\"", name)}\"";
+        }
+        public override string TrimQuoteSqlName(string name)
+        {
+            var nametrim = name.Trim();
+            if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
+                return nametrim; //原生SQL
+            return $"{nametrim.Trim('"').Replace("\".\"", ".").Replace(".\"", ".")}";
+        }
+        public override string[] SplitTableName(string name) => GetSplitTableNames(name, '"', '"', 2);
+        public override string QuoteParamterName(string name) => $":{(_orm.CodeFirst.IsSyncStructureToLower ? name.ToLower() : name)}";
+        public override string IsNull(string sql, object value) => $"nvl({sql}, {value})";
+        public override string StringConcat(string[] objs, Type[] types) => $"{string.Join(" || ", objs)}";
+        public override string Mod(string left, string right, Type leftType, Type rightType) => $"mod({left}, {right})";
+        public override string Div(string left, string right, Type leftType, Type rightType) => $"trunc({left} / {right})";
+        public override string Now => "systimestamp";
+        public override string NowUtc => "getutcdate";
+
+        public override string QuoteWriteParamter(Type type, string paramterName) => paramterName;
+        public override string QuoteReadColumn(Type type, Type mapType, string columnName) => columnName;
+
+        public override string GetNoneParamaterSqlValue(List<DbParameter> specialParams, Type type, object value)
+        {
+            if (value == null) return "NULL";
+            if (type == typeof(byte[])) return $"hextoraw('{CommonUtils.BytesSqlRaw(value as byte[])}')";
+            return FormatSql("{0}", value, 1);
+        }
+    }
+}