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FreeSql/FreeSql/SqlServer/SqlServerCodeFirst.cs

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17 KiB
C#
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using FreeSql.DatabaseModel;
using FreeSql.Internal;
using FreeSql.Internal.Model;
using System;
using System.Collections.Generic;
using System.Collections.Concurrent;
using System.Data;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
namespace FreeSql.SqlServer {
class SqlServerCodeFirst : ICodeFirst {
IFreeSql _orm;
protected CommonUtils _commonUtils;
protected CommonExpression _commonExpression;
public SqlServerCodeFirst(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression) {
_orm = orm;
_commonUtils = commonUtils;
_commonExpression = commonExpression;
}
public bool IsAutoSyncStructure { get; set; } = true;
public bool IsSyncStructureToLower { get; set; } = false;
static object _dicCsToDbLock = new object();
static Dictionary<string, (SqlDbType type, string dbtype, string dbtypeFull, bool? isUnsigned, bool? isnullable, object defaultValue)> _dicCsToDb = new Dictionary<string, (SqlDbType type, string dbtype, string dbtypeFull, bool? isUnsigned, bool? isnullable, object defaultValue)>() {
{ typeof(bool).FullName, (SqlDbType.Bit, "bit","bit NOT NULL", null, false, false) },{ typeof(bool?).FullName, (SqlDbType.Bit, "bit","bit", null, true, null) },
{ typeof(sbyte).FullName, (SqlDbType.SmallInt, "smallint", "smallint NOT NULL", false, false, 0) },{ typeof(sbyte?).FullName, (SqlDbType.SmallInt, "smallint", "smallint", false, true, null) },
{ typeof(short).FullName, (SqlDbType.SmallInt, "smallint","smallint NOT NULL", false, false, 0) },{ typeof(short?).FullName, (SqlDbType.SmallInt, "smallint", "smallint", false, true, null) },
{ typeof(int).FullName, (SqlDbType.Int, "int", "int NOT NULL", false, false, 0) },{ typeof(int?).FullName, (SqlDbType.Int, "int", "int", false, true, null) },
{ typeof(long).FullName, (SqlDbType.BigInt, "bigint","bigint NOT NULL", false, false, 0) },{ typeof(long?).FullName, (SqlDbType.BigInt, "bigint","bigint", false, true, null) },
{ typeof(byte).FullName, (SqlDbType.TinyInt, "tinyint","tinyint NOT NULL", true, false, 0) },{ typeof(byte?).FullName, (SqlDbType.TinyInt, "tinyint","tinyint", true, true, null) },
{ typeof(ushort).FullName, (SqlDbType.Int, "int","int NOT NULL", true, false, 0) },{ typeof(ushort?).FullName, (SqlDbType.Int, "int", "int", true, true, null) },
{ typeof(uint).FullName, (SqlDbType.BigInt, "bigint", "bigint NOT NULL", true, false, 0) },{ typeof(uint?).FullName, (SqlDbType.BigInt, "bigint", "bigint", true, true, null) },
{ typeof(ulong).FullName, (SqlDbType.Decimal, "decimal", "decimal(20,0) NOT NULL", true, false, 0) },{ typeof(ulong?).FullName, (SqlDbType.Decimal, "decimal", "decimal(20,0)", true, true, null) },
{ typeof(double).FullName, (SqlDbType.Float, "float", "float NOT NULL", false, false, 0) },{ typeof(double?).FullName, (SqlDbType.Float, "float", "float", false, true, null) },
{ typeof(float).FullName, (SqlDbType.Real, "real","real NOT NULL", false, false, 0) },{ typeof(float?).FullName, (SqlDbType.Real, "real","real", false, true, null) },
{ typeof(decimal).FullName, (SqlDbType.Decimal, "decimal", "decimal(10,2) NOT NULL", false, false, 0) },{ typeof(decimal?).FullName, (SqlDbType.Decimal, "decimal", "decimal(10,2)", false, true, null) },
{ typeof(TimeSpan).FullName, (SqlDbType.Time, "time","time NOT NULL", false, false, 0) },{ typeof(TimeSpan?).FullName, (SqlDbType.Time, "time", "time",false, true, null) },
{ typeof(DateTime).FullName, (SqlDbType.DateTime, "datetime", "datetime NOT NULL", false, false, new DateTime(1970,1,1)) },{ typeof(DateTime?).FullName, (SqlDbType.DateTime, "datetime", "datetime", false, true, null) },
{ typeof(DateTimeOffset).FullName, (SqlDbType.DateTimeOffset, "datetimeoffset", "datetimeoffset NOT NULL", false, false, new DateTimeOffset(new DateTime(1970,1,1), TimeSpan.Zero)) },{ typeof(DateTimeOffset?).FullName, (SqlDbType.DateTimeOffset, "datetimeoffset", "datetimeoffset", false, true, null) },
{ typeof(byte[]).FullName, (SqlDbType.VarBinary, "varbinary", "varbinary(255)", false, null, new byte[0]) },
{ typeof(string).FullName, (SqlDbType.NVarChar, "nvarchar", "nvarchar(255)", false, null, "") },
{ typeof(Guid).FullName, (SqlDbType.UniqueIdentifier, "uniqueidentifier", "uniqueidentifier NOT NULL", false, false, Guid.Empty) },{ typeof(Guid?).FullName, (SqlDbType.UniqueIdentifier, "uniqueidentifier", "uniqueidentifier", false, true, null) },
};
public (int type, string dbtype, string dbtypeFull, bool? isnullable, object defaultValue)? GetDbInfo(Type type) {
if (_dicCsToDb.TryGetValue(type.FullName, out var trydc)) return new (int, string, string, bool?, object)?(((int)trydc.type, trydc.dbtype, trydc.dbtypeFull, trydc.isnullable, trydc.defaultValue));
if (type.IsArray) return null;
var enumType = type.IsEnum ? type : null;
if (enumType == null && type.FullName.StartsWith("System.Nullable`1[") && type.GenericTypeArguments.Length == 1 && type.GenericTypeArguments.First().IsEnum) enumType = type.GenericTypeArguments.First();
if (enumType != null) {
var newItem = enumType.GetCustomAttributes(typeof(FlagsAttribute), false).Any() ?
(SqlDbType.BigInt, "bigint", $"bigint{(type.IsEnum ? " NOT NULL" : "")}", false, type.IsEnum ? false : true, Enum.GetValues(enumType).GetValue(0)) :
(SqlDbType.Int, "int", $"int{(type.IsEnum ? " NOT NULL" : "")}", false, type.IsEnum ? false : true, Enum.GetValues(enumType).GetValue(0));
if (_dicCsToDb.ContainsKey(type.FullName) == false) {
lock (_dicCsToDbLock) {
if (_dicCsToDb.ContainsKey(type.FullName) == false)
_dicCsToDb.Add(type.FullName, newItem);
}
}
return ((int)newItem.Item1, newItem.Item2, newItem.Item3, newItem.Item5, newItem.Item6);
}
return null;
}
public string GetComparisonDDLStatements<TEntity>() => this.GetComparisonDDLStatements(typeof(TEntity));
public string GetComparisonDDLStatements(params Type[] entityTypes) {
var conn = _orm.Ado.MasterPool.Get(TimeSpan.FromSeconds(5));
var database = conn.Value.Database;
Func<string, string, object> ExecuteScalar = (db, sql) => {
if (string.Compare(database, db) != 0) try { conn.Value.ChangeDatabase(db); } catch { }
try {
using (var cmd = conn.Value.CreateCommand()) {
cmd.CommandText = sql;
cmd.CommandType = CommandType.Text;
return cmd.ExecuteScalar();
}
} finally {
if (string.Compare(database, db) != 0) conn.Value.ChangeDatabase(database);
}
};
var sb = new StringBuilder();
try {
foreach (var entityType in entityTypes) {
if (sb.Length > 0) sb.Append("\r\n");
var tb = _commonUtils.GetTableByEntity(entityType);
var tbname = tb.DbName.Split(new[] { '.' }, 3);
if (tbname?.Length == 1) tbname = new[] { database, "dbo", tbname[0] };
if (tbname?.Length == 2) tbname = new[] { database, tbname[0], tbname[1] };
var tboldname = tb.DbOldName?.Split(new[] { '.' }, 3); //旧表名
if (tboldname?.Length == 1) tboldname = new[] { database, "dbo", tboldname[0] };
if (tboldname?.Length == 2) tboldname = new[] { database, tboldname[0], tboldname[1] };
if (string.Compare(tbname[0], database, true) != 0 && ExecuteScalar(database, $"select 1 from sys.databases where name='{tbname[0]}'") == null) //创建数据库
ExecuteScalar(database, $"if not exists(select 1 from sys.databases where name='{tbname[0]}')\r\n\tcreate database [{tbname[0]}];");
if (string.Compare(tbname[1], "dbo", true) != 0 && ExecuteScalar(tbname[0], $"select 1 from sys.schemas where name='{tbname[1]}'") == null) //创建模式
ExecuteScalar(tbname[0], $"create schema [{tbname[1]}] authorization [dbo]");
var sbalter = new StringBuilder();
var istmpatler = false; //创建临时表，导入数据，删除旧表，修改
if (ExecuteScalar(tbname[0], $"select 1 from dbo.sysobjects where id = object_id(N'[{tbname[1]}].[{tbname[2]}]') and OBJECTPROPERTY(id, N'IsUserTable') = 1") == null) { //表不存在
if (tboldname != null) {
if (string.Compare(tboldname[0], tbname[0], true) != 0 && ExecuteScalar(database, $"select 1 from sys.databases where name='{tboldname[0]}'") == null ||
string.Compare(tboldname[1], tbname[1], true) != 0 && ExecuteScalar(tboldname[0], $"select 1 from sys.schemas where name='{tboldname[1]}'") == null ||
ExecuteScalar(tboldname[0], $"select 1 from dbo.sysobjects where id = object_id(N'[{tboldname[1]}].[{tboldname[2]}]') and OBJECTPROPERTY(id, N'IsUserTable') = 1") == null)
//数据库或模式或表不存在
tboldname = null;
}
if (tboldname == null) {
//创建新表
sb.Append("use ").Append(_commonUtils.QuoteSqlName(tbname[0])).Append(";\r\nCREATE TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[1]}.{tbname[2]}")).Append(" (");
foreach (var tbcol in tb.Columns.Values) {
sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ");
sb.Append(tbcol.Attribute.DbType);
if (tbcol.Attribute.IsIdentity && tbcol.Attribute.DbType.IndexOf("identity", StringComparison.CurrentCultureIgnoreCase) == -1) sb.Append(" identity(1,1)");
if (tbcol.Attribute.IsPrimary) sb.Append(" primary key");
sb.Append(",");
}
sb.Remove(sb.Length - 1, 1).Append("\r\n);\r\n");
continue;
}
//如果新表，旧表在一个数据库和模式下，直接修改表名
if (string.Compare(tbname[0], tboldname[0], true) == 0 &&
string.Compare(tbname[1], tboldname[1], true) == 0)
sbalter.Append("use ").Append(_commonUtils.QuoteSqlName(tbname[0])).Append(_commonUtils.FormatSql(";\r\nEXEC sp_rename {0}, {1};\r\n", _commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}"), _commonUtils.QuoteSqlName(tbname[2])));
else {
//如果新表，旧表不在一起，创建新表，导入数据，删除旧表
istmpatler = true;
}
} else
tboldname = null; //如果新表已经存在，不走改表名逻辑
//对比字段，只可以修改类型、增加字段、有限的修改字段名；保证安全不删除字段
var sql = string.Format(@"
use [{0}];
select
a.name 'Column'
,b.name + case
when b.name in ('Char', 'VarChar', 'NChar', 'NVarChar', 'Binary', 'VarBinary') then '(' +
case when a.max_length = -1 then 'MAX'
when b.name in ('NChar', 'NVarchar') then cast(a.max_length / 2 as varchar)
else cast(a.max_length as varchar) end + ')'
when b.name in ('Numeric', 'Decimal') then '(' + cast(a.precision as varchar) + ',' + cast(a.scale as varchar) + ')'
else '' end as 'SqlType'
,case when a.is_nullable = 1 then '1' else '0' end 'IsNullable'
,case when a.is_identity = 1 then '1' else '0' end 'IsIdentity'
from sys.columns a
inner join sys.types b on b.user_type_id = a.user_type_id
left join sys.extended_properties AS c ON c.major_id = a.object_id AND c.minor_id = a.column_id
left join sys.tables d on d.object_id = a.object_id
left join sys.schemas e on e.schema_id = d.schema_id
where a.object_id in (object_id(N'[{1}].[{2}]'));
use " + database, tboldname ?? tbname);
var ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
var tbstruct = ds.ToDictionary(a => string.Concat(a[0]), a => new {
column = string.Concat(a[0]),
sqlType = string.Concat(a[1]),
is_nullable = string.Concat(a[2]) == "1",
is_identity = string.Concat(a[3]) == "1"
}, StringComparer.CurrentCultureIgnoreCase);
if (istmpatler == false) {
foreach (var tbcol in tb.Columns.Values) {
if (tbstruct.TryGetValue(tbcol.Attribute.Name, out var tbstructcol) ||
string.IsNullOrEmpty(tbcol.Attribute.OldName) == false && tbstruct.TryGetValue(tbcol.Attribute.OldName, out tbstructcol)) {
if (tbcol.Attribute.DbType.StartsWith(tbstructcol.sqlType, StringComparison.CurrentCultureIgnoreCase) == false ||
tbcol.Attribute.IsNullable != tbstructcol.is_nullable ||
tbcol.Attribute.IsIdentity != tbstructcol.is_identity) {
istmpatler = true;
break;
}
if (tbstructcol.column == tbcol.Attribute.OldName) {
//修改列名
sbalter.Append(_commonUtils.FormatSql("EXEC sp_rename {0}, {1}, 'COLUMN';\r\n", $"{tbname[0]}.{tbname[1]}.{tbname[2]}.{tbcol.Attribute.OldName}", tbcol.Attribute.Name));
}
continue;
}
//添加列
sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbname[2]}")).Append(" ADD ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType);
if (tbcol.Attribute.IsIdentity && tbcol.Attribute.DbType.IndexOf("identity", StringComparison.CurrentCultureIgnoreCase) == -1) sbalter.Append(" identity(1,1)");
if (tbcol.Attribute.IsNullable == false) {
var addcoldbdefault = tbcol.Attribute.DbDefautValue;
if (addcoldbdefault != null) sbalter.Append(_commonUtils.FormatSql(" default({0})", addcoldbdefault));
}
sbalter.Append(";\r\n");
}
}
if (istmpatler == false) {
sb.Append(sbalter);
continue;
}
//创建临时表，数据导进临时表，然后删除原表，将临时表改名为原表名
bool idents = false;
var tablename = tboldname == null ? _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbname[2]}") : _commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}.{tboldname[2]}");
var tmptablename = _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.FreeSqlTmp_{tbname[2]}");
sb.Append("BEGIN TRANSACTION\r\n")
.Append("SET QUOTED_IDENTIFIER ON\r\n")
.Append("SET ARITHABORT ON\r\n")
.Append("SET NUMERIC_ROUNDABORT OFF\r\n")
.Append("SET CONCAT_NULL_YIELDS_NULL ON\r\n")
.Append("SET ANSI_NULLS ON\r\n")
.Append("SET ANSI_PADDING ON\r\n")
.Append("SET ANSI_WARNINGS ON\r\n")
.Append("COMMIT\r\n");
sb.Append("BEGIN TRANSACTION;\r\n");
//创建临时表
sb.Append("CREATE TABLE ").Append(tmptablename).Append(" (");
foreach (var tbcol in tb.Columns.Values) {
sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ");
sb.Append(tbcol.Attribute.DbType);
if (tbcol.Attribute.IsIdentity && tbcol.Attribute.DbType.IndexOf("identity", StringComparison.CurrentCultureIgnoreCase) == -1) sb.Append(" identity(1,1)");
if (tbcol.Attribute.IsPrimary) sb.Append(" primary key");
sb.Append(",");
idents = idents || tbcol.Attribute.IsIdentity;
}
sb.Remove(sb.Length - 1, 1).Append("\r\n);\r\n");
sb.Append("ALTER TABLE ").Append(tmptablename).Append(" SET (LOCK_ESCALATION = TABLE);\r\n");
if (idents) sb.Append("SET IDENTITY_INSERT ").Append(tmptablename).Append(" ON;\r\n");
sb.Append("IF EXISTS(SELECT 1 FROM ").Append(tablename).Append(")\r\n");
sb.Append("\tEXEC('INSERT INTO ").Append(tmptablename).Append(" (");
foreach (var tbcol in tb.Columns.Values)
sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
sb.Remove(sb.Length - 2, 2).Append(")\r\n\t\tSELECT ");
foreach (var tbcol in tb.Columns.Values) {
var insertvalue = "NULL";
if (tbstruct.TryGetValue(tbcol.Attribute.Name, out var tbstructcol) ||
string.IsNullOrEmpty(tbcol.Attribute.OldName) == false && tbstruct.TryGetValue(tbcol.Attribute.OldName, out tbstructcol)) {
insertvalue = _commonUtils.QuoteSqlName(tbstructcol.column);
if (tbcol.Attribute.DbType.StartsWith(tbstructcol.sqlType, StringComparison.CurrentCultureIgnoreCase) == false)
insertvalue = $"cast({insertvalue} as {tbcol.Attribute.DbType.Split(' ').First()})";
if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable)
insertvalue = $"isnull({insertvalue},{_commonUtils.FormatSql("{0}", tbcol.Attribute.DbDefautValue).Replace("'", "''")})";
} else if (tbcol.Attribute.IsNullable == false)
insertvalue = _commonUtils.FormatSql("{0}", tbcol.Attribute.DbDefautValue).Replace("'", "''");
sb.Append(insertvalue).Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append(" FROM ").Append(tablename).Append(" WITH (HOLDLOCK TABLOCKX)');\r\n");
if (idents) sb.Append("SET IDENTITY_INSERT ").Append(tmptablename).Append(" OFF;\r\n");
sb.Append("DROP TABLE ").Append(tablename).Append(";\r\n");
sb.Append("EXECUTE sp_rename N'").Append(tmptablename).Append("', N'").Append(tbname[2]).Append("', 'OBJECT' ;\r\n");
sb.Append("COMMIT;\r\n");
}
return sb.Length == 0 ? null : sb.ToString();
} finally {
try {
conn.Value.ChangeDatabase(database);
_orm.Ado.MasterPool.Return(conn);
} catch {
_orm.Ado.MasterPool.Return(conn, true);
}
}
}
ConcurrentDictionary<string, bool> dicSyced = new ConcurrentDictionary<string, bool>();
public bool SyncStructure<TEntity>() => this.SyncStructure(typeof(TEntity));
public bool SyncStructure(params Type[] entityTypes) {
if (entityTypes == null) return true;
var syncTypes = entityTypes.Where(a => dicSyced.ContainsKey(a.FullName) == false).ToArray();
if (syncTypes.Any() == false) return true;
var ddl = this.GetComparisonDDLStatements(syncTypes);
if (string.IsNullOrEmpty(ddl)) {
foreach (var syncType in syncTypes) dicSyced.TryAdd(syncType.FullName, true);
return true;
}
var affrows = _orm.Ado.ExecuteNonQuery(CommandType.Text, ddl);
foreach (var syncType in syncTypes) dicSyced.TryAdd(syncType.FullName, true);
return affrows > 0;
}
}
}
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