tk/FreeSql
1
0
Fork 0
mirror of https://github.com/nsnail/FreeSql.git synced 2026-09-02 00:34:58 +08:00
Code Issues Packages Projects Releases Wiki Activity
Files
b9d3ad8fec6c49c18101c8fad2531d0659f6a6a3
FreeSql/Providers/FreeSql.Provider.MySql/MySqlCodeFirst.cs
T
28810 994cc475c2 - 解决 表名名称包含点，无法进行 CRUD 的问题，由于测试的复杂性，此类情况仅支持 MySql/Sqlite CodeFirst 自动迁移； 
> 注意：尽量不要使用带点的表名，只有 MySql/Sqlite 对此类表名支持 CodeFirst。但是它不影响 CRUD 功能，使用 [Table(Name = "`sys.config`")] 解决
2020-01-11 02:22:16 +08:00

374 lines
28 KiB
C#
Raw Blame History

using FreeSql.Internal;
using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
namespace FreeSql.MySql
{
class MySqlCodeFirst : Internal.CommonProvider.CodeFirstProvider
{
public MySqlCodeFirst(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression) : base(orm, commonUtils, commonExpression) { }
static object _dicCsToDbLock = new object();
static Dictionary<string, (MySqlDbType type, string dbtype, string dbtypeFull, bool? isUnsigned, bool? isnullable, object defaultValue)> _dicCsToDb = new Dictionary<string, (MySqlDbType type, string dbtype, string dbtypeFull, bool? isUnsigned, bool? isnullable, object defaultValue)>() {
{ typeof(bool).FullName, (MySqlDbType.Bit, "bit","bit(1) NOT NULL", null, false, false) },{ typeof(bool?).FullName, (MySqlDbType.Bit, "bit","bit(1)", null, true, null) },
{ typeof(sbyte).FullName, (MySqlDbType.Byte, "tinyint", "tinyint(3) NOT NULL", false, false, 0) },{ typeof(sbyte?).FullName, (MySqlDbType.Byte, "tinyint", "tinyint(3)", false, true, null) },
{ typeof(short).FullName, (MySqlDbType.Int16, "smallint","smallint(6) NOT NULL", false, false, 0) },{ typeof(short?).FullName, (MySqlDbType.Int16, "smallint", "smallint(6)", false, true, null) },
{ typeof(int).FullName, (MySqlDbType.Int32, "int", "int(11) NOT NULL", false, false, 0) },{ typeof(int?).FullName, (MySqlDbType.Int32, "int", "int(11)", false, true, null) },
{ typeof(long).FullName, (MySqlDbType.Int64, "bigint","bigint(20) NOT NULL", false, false, 0) },{ typeof(long?).FullName, (MySqlDbType.Int64, "bigint","bigint(20)", false, true, null) },
{ typeof(byte).FullName, (MySqlDbType.UByte, "tinyint","tinyint(3) unsigned NOT NULL", true, false, 0) },{ typeof(byte?).FullName, (MySqlDbType.UByte, "tinyint","tinyint(3) unsigned", true, true, null) },
{ typeof(ushort).FullName, (MySqlDbType.UInt16, "smallint","smallint(5) unsigned NOT NULL", true, false, 0) },{ typeof(ushort?).FullName, (MySqlDbType.UInt16, "smallint", "smallint(5) unsigned", true, true, null) },
{ typeof(uint).FullName, (MySqlDbType.UInt32, "int", "int(10) unsigned NOT NULL", true, false, 0) },{ typeof(uint?).FullName, (MySqlDbType.UInt32, "int", "int(10) unsigned", true, true, null) },
{ typeof(ulong).FullName, (MySqlDbType.UInt64, "bigint", "bigint(20) unsigned NOT NULL", true, false, 0) },{ typeof(ulong?).FullName, (MySqlDbType.UInt64, "bigint", "bigint(20) unsigned", true, true, null) },
{ typeof(double).FullName, (MySqlDbType.Double, "double", "double NOT NULL", false, false, 0) },{ typeof(double?).FullName, (MySqlDbType.Double, "double", "double", false, true, null) },
{ typeof(float).FullName, (MySqlDbType.Float, "float","float NOT NULL", false, false, 0) },{ typeof(float?).FullName, (MySqlDbType.Float, "float","float", false, true, null) },
{ typeof(decimal).FullName, (MySqlDbType.Decimal, "decimal", "decimal(10,2) NOT NULL", false, false, 0) },{ typeof(decimal?).FullName, (MySqlDbType.Decimal, "decimal", "decimal(10,2)", false, true, null) },
{ typeof(TimeSpan).FullName, (MySqlDbType.Time, "time","time NOT NULL", false, false, 0) },{ typeof(TimeSpan?).FullName, (MySqlDbType.Time, "time", "time",false, true, null) },
{ typeof(DateTime).FullName, (MySqlDbType.DateTime, "datetime(3)", "datetime(3) NOT NULL", false, false, new DateTime(1970,1,1)) },{ typeof(DateTime?).FullName, (MySqlDbType.DateTime, "datetime(3)", "datetime(3)", false, true, null) },
{ typeof(byte[]).FullName, (MySqlDbType.VarBinary, "varbinary", "varbinary(255)", false, null, new byte[0]) },
{ typeof(string).FullName, (MySqlDbType.VarChar, "varchar", "varchar(255)", false, null, "") },
{ typeof(Guid).FullName, (MySqlDbType.VarChar, "char", "char(36) NOT NULL", false, false, Guid.Empty) },{ typeof(Guid?).FullName, (MySqlDbType.VarChar, "char", "char(36)", false, true, null) },
{ typeof(MygisPoint).FullName, (MySqlDbType.Geometry, "point", "point", false, null, new MygisPoint(0, 0)) },
{ typeof(MygisLineString).FullName, (MySqlDbType.Geometry, "linestring", "linestring", false, null, new MygisLineString(new[]{new MygisCoordinate2D(),new MygisCoordinate2D()})) },
{ typeof(MygisPolygon).FullName, (MySqlDbType.Geometry, "polygon", "polygon", false, null, new MygisPolygon(new[]{new[]{new MygisCoordinate2D(),new MygisCoordinate2D()},new[]{new MygisCoordinate2D(),new MygisCoordinate2D()}})) },
{ typeof(MygisMultiPoint).FullName, (MySqlDbType.Geometry, "multipoint","multipoint", false, null, new MygisMultiPoint(new[]{new MygisCoordinate2D(),new MygisCoordinate2D()})) },
{ typeof(MygisMultiLineString).FullName, (MySqlDbType.Geometry, "multilinestring","multilinestring", false, null, new MygisMultiLineString(new[]{new[]{new MygisCoordinate2D(),new MygisCoordinate2D()},new[]{new MygisCoordinate2D(),new MygisCoordinate2D()}})) },
{ typeof(MygisMultiPolygon).FullName, (MySqlDbType.Geometry, "multipolygon", "multipolygon", false, null, new MygisMultiPolygon(new[]{new MygisPolygon(new[]{new[]{new MygisCoordinate2D(),new MygisCoordinate2D()},new[]{new MygisCoordinate2D(),new MygisCoordinate2D()}}),new MygisPolygon(new[]{new[]{new MygisCoordinate2D(),new MygisCoordinate2D()},new[]{new MygisCoordinate2D(),new MygisCoordinate2D()}})})) },
};
public override (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.IsNullableType())
{
var genericTypes = type.GetGenericArguments();
if (genericTypes.Length == 1 && genericTypes.First().IsEnum) enumType = genericTypes.First();
}
if (enumType != null)
{
var names = string.Join(",", Enum.GetNames(enumType).Select(a => _commonUtils.FormatSql("{0}", a)));
var newItem = enumType.GetCustomAttributes(typeof(FlagsAttribute), false).Any() ?
(MySqlDbType.Set, "set", $"set({names}){(type.IsEnum ? " NOT NULL" : "")}", false, type.IsEnum ? false : true, Enum.GetValues(enumType).GetValue(0)) :
(MySqlDbType.Enum, "enum", $"enum({names}){(type.IsEnum ? " NOT NULL" : "")}", false, type.IsEnum ? false : true, Enum.GetValues(enumType).GetValue(0));
if (_dicCsToDb.ContainsKey(type.FullName) == false)
{
lock (_dicCsToDbLock)
{
if (_dicCsToDb.ContainsKey(type.FullName) == false)
_dicCsToDb.Add(type.FullName, newItem);
}
}
return ((int)newItem.Item1, newItem.Item2, newItem.Item3, newItem.Item5, newItem.Item6);
}
return null;
}
protected override string GetComparisonDDLStatements(params (Type entityType, string tableName)[] objects)
{
var conn = _orm.Ado.MasterPool.Get(TimeSpan.FromSeconds(5));
var database = conn.Value.Database;
Func<string, string, object> ExecuteScalar = (db, sql) =>
{
if (string.Compare(database, db) != 0) conn.Value.ChangeDatabase(db);
try
{
using (var cmd = conn.Value.CreateCommand())
{
cmd.CommandText = sql;
cmd.CommandType = CommandType.Text;
return cmd.ExecuteScalar();
}
}
finally
{
if (string.Compare(database, db) != 0) conn.Value.ChangeDatabase(database);
}
};
var sb = new StringBuilder();
try
{
foreach (var obj in objects)
{
if (sb.Length > 0) sb.Append("\r\n");
var tb = _commonUtils.GetTableByEntity(obj.entityType);
if (tb == null) throw new Exception($"类型 {obj.entityType.FullName} 不可迁移");
if (tb.Columns.Any() == false) throw new Exception($"类型 {obj.entityType.FullName} 不可迁移，可迁移属性0个");
var tbname = _commonUtils.SplitTableName(tb.DbName);
if (tbname?.Length == 1) tbname = new[] { database, tbname[0] };
var tboldname = _commonUtils.SplitTableName(tb.DbOldName); //旧表名
if (tboldname?.Length == 1) tboldname = new[] { database, tboldname[0] };
if (string.IsNullOrEmpty(obj.tableName) == false)
{
var tbtmpname = _commonUtils.SplitTableName(obj.tableName);
if (tbtmpname?.Length == 1) tbtmpname = new[] { database, tbtmpname[0] };
if (tbname[0] != tbtmpname[0] || tbname[1] != tbtmpname[1])
{
tbname = tbtmpname;
tboldname = null;
}
}
if (string.Compare(tbname[0], database, true) != 0 && ExecuteScalar(database, _commonUtils.FormatSql(" select 1 from information_schema.schemata where schema_name={0}", tbname[0])) == null) //创建数据库
sb.Append($"CREATE DATABASE IF NOT EXISTS ").Append(_commonUtils.QuoteSqlName(tbname[0])).Append(" default charset utf8 COLLATE utf8_general_ci;\r\n");
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], _commonUtils.FormatSql(" SELECT 1 FROM information_schema.TABLES WHERE table_schema={0} and table_name={1}", tbname)) == null)
{ //表不存在
if (tboldname != null)
{
if (string.Compare(tboldname[0], tbname[0], true) != 0 && ExecuteScalar(database, _commonUtils.FormatSql(" select 1 from information_schema.schemata where schema_name={0}", tboldname[0])) == null ||
ExecuteScalar(tboldname[0], _commonUtils.FormatSql(" SELECT 1 FROM information_schema.TABLES WHERE table_schema={0} and table_name={1}", tboldname)) == null)
//数据库或表不存在
tboldname = null;
}
if (tboldname == null)
{
//创建表
var createTableName = _commonUtils.QuoteSqlName(tbname[0], tbname[1]);
sb.Append("CREATE TABLE IF NOT EXISTS ").Append(createTableName).Append(" ( ");
foreach (var tbcol in tb.ColumnsByPosition)
{
sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType);
if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sb.Append(" AUTO_INCREMENT");
if (string.IsNullOrEmpty(tbcol.Comment) == false) sb.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment));
sb.Append(",");
}
if (tb.Primarys.Any())
{
sb.Append(" \r\n PRIMARY KEY (");
foreach (var tbcol in tb.Primarys) sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
sb.Remove(sb.Length - 2, 2).Append("),");
}
sb.Remove(sb.Length - 1, 1);
sb.Append("\r\n) Engine=InnoDB;\r\n");
//创建表的索引
foreach (var uk in tb.Indexes)
{
sb.Append("CREATE ");
if (uk.IsUnique) sb.Append("UNIQUE ");
sb.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(createTableName).Append("(");
foreach (var tbcol in uk.Columns)
{
sb.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name));
if (tbcol.IsDesc) sb.Append(" DESC");
sb.Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append(");\r\n");
}
continue;
}
//如果新表，旧表在一个数据库下，直接修改表名
if (string.Compare(tbname[0], tboldname[0], true) == 0)
sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName(tboldname[0], tboldname[1])).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName(tbname[0], tbname[1])).Append(";\r\n");
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 = _commonUtils.FormatSql(@"
select
a.column_name,
a.column_type,
case when a.is_nullable = 'YES' then 1 else 0 end 'is_nullable',
case when locate('auto_increment', a.extra) > 0 then 1 else 0 end 'is_identity',
a.column_comment 'comment'
from information_schema.columns a
where a.table_schema in ({0}) and a.table_name in ({1})", tboldname ?? tbname);
var ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
var tbstruct = ds.ToDictionary(a => string.Concat(a[0]), a =>
{
var a1 = string.Concat(a[1]);
if (a1 == "datetime") a1 = string.Concat(a1, "(0)");
return new
{
column = string.Concat(a[0]),
sqlType = a1,
is_nullable = string.Concat(a[2]) == "1",
is_identity = string.Concat(a[3]) == "1",
is_unsigned = string.Concat(a[1]).EndsWith(" unsigned"),
comment = string.Concat(a[4])
};
}, StringComparer.CurrentCultureIgnoreCase);
if (istmpatler == false)
{
var existsPrimary = ExecuteScalar(tbname[0], _commonUtils.FormatSql(" select 1 from information_schema.key_column_usage where table_schema={0} and table_name={1} and constraint_name = 'PRIMARY' limit 1", tbname));
foreach (var tbcol in tb.ColumnsByPosition)
{
var isIdentityChanged = tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1;
if (tbstruct.TryGetValue(tbcol.Attribute.Name, out var tbstructcol) ||
string.IsNullOrEmpty(tbcol.Attribute.OldName) == false && tbstruct.TryGetValue(tbcol.Attribute.OldName, out tbstructcol))
{
var isCommentChanged = tbstructcol.comment != (tbcol.Comment ?? "");
var isDbTypeChanged = tbcol.Attribute.DbType.StartsWith(tbstructcol.sqlType, StringComparison.CurrentCultureIgnoreCase) == false;
if (tbstructcol.sqlType == "datetime(0)" && Regex.IsMatch(tbcol.Attribute.DbType, @"datetime\s+\(", RegexOptions.IgnoreCase) == false)
isDbTypeChanged = tbcol.Attribute.DbType.StartsWith("datetime", StringComparison.CurrentCultureIgnoreCase) == false;
if ((tbcol.Attribute.DbType.IndexOf(" unsigned", StringComparison.CurrentCultureIgnoreCase) != -1) != tbstructcol.is_unsigned ||
isDbTypeChanged ||
tbcol.Attribute.IsNullable != tbstructcol.is_nullable ||
tbcol.Attribute.IsIdentity != tbstructcol.is_identity ||
isCommentChanged)
{
if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable && tbcol.Attribute.IsNullable == false && tbcol.DbDefaultValue != "NULL" && tbcol.Attribute.IsIdentity == false)
sbalter.Append("UPDATE ").Append(_commonUtils.QuoteSqlName(tbname[0], tbname[1])).Append(" SET ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" = ").Append(tbcol.DbDefaultValue).Append(" WHERE ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" IS NULL;\r\n");
sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName(tbname[0], tbname[1])).Append(" MODIFY ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(tbcol.Attribute.DbType);
if (string.IsNullOrEmpty(tbcol.Comment) == false) sbalter.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? ""));
if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sbalter.Append(" AUTO_INCREMENT");
if (tbcol.Attribute.IsIdentity == true) sbalter.Append(existsPrimary == null ? "" : ", DROP PRIMARY KEY").Append(", ADD PRIMARY KEY(").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(")");
sbalter.Append(";\r\n");
}
if (string.Compare(tbstructcol.column, tbcol.Attribute.OldName, true) == 0)
{
//修改列名
sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName(tbname[0], tbname[1])).Append(" CHANGE COLUMN ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType);
if (string.IsNullOrEmpty(tbcol.Comment) == false) sbalter.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? ""));
if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sbalter.Append(" AUTO_INCREMENT");
if (tbcol.Attribute.IsIdentity == true) sbalter.Append(existsPrimary == null ? "" : ", DROP PRIMARY KEY").Append(", ADD PRIMARY KEY(").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(")");
sbalter.Append(";\r\n");
}
continue;
}
//添加列
sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName(tbname[0], tbname[1])).Append(" ADD ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType);
if (tbcol.Attribute.IsNullable == false && tbcol.DbDefaultValue != "NULL" && tbcol.Attribute.IsIdentity == false) sbalter.Append(" DEFAULT ").Append(tbcol.DbDefaultValue);
if (string.IsNullOrEmpty(tbcol.Comment) == false) sbalter.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? ""));
if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sbalter.Append(" AUTO_INCREMENT");
if (tbcol.Attribute.IsIdentity == true) sbalter.Append(existsPrimary == null ? "" : ", DROP PRIMARY KEY").Append(", ADD PRIMARY KEY(").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(")");
sbalter.Append(";\r\n");
}
var dsuksql = _commonUtils.FormatSql(@"
select
a.column_name,
a.index_name 'index_id',
0 'IsDesc',
case when a.non_unique = 0 then 1 else 0 end 'IsUnique'
from information_schema.statistics a
where a.table_schema IN ({0}) and a.table_name IN ({1}) and a.index_name <> 'PRIMARY'", tboldname ?? tbname);
var dsuk = _orm.Ado.ExecuteArray(CommandType.Text, dsuksql).Select(a => new[] { string.Concat(a[0]), string.Concat(a[1]), string.Concat(a[2]), string.Concat(a[3]) });
foreach (var uk in tb.Indexes)
{
if (string.IsNullOrEmpty(uk.Name) || uk.Columns.Any() == false) continue;
var dsukfind1 = dsuk.Where(a => string.Compare(a[1], uk.Name, true) == 0).ToArray();
if (dsukfind1.Any() == false || dsukfind1.Length != uk.Columns.Length || dsukfind1.Where(a => (a[3] == "1") == uk.IsUnique && uk.Columns.Where(b => string.Compare(b.Column.Attribute.Name, a[0], true) == 0 && (a[2] == "1") == b.IsDesc).Any()).Count() != uk.Columns.Length)
{
if (dsukfind1.Any()) sbalter.Append("DROP INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(_commonUtils.QuoteSqlName(tbname[0], tbname[1])).Append(";\r\n");
sbalter.Append("CREATE ");
if (uk.IsUnique) sbalter.Append("UNIQUE ");
sbalter.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(_commonUtils.QuoteSqlName(tbname[0], tbname[1])).Append("(");
foreach (var tbcol in uk.Columns)
{
sbalter.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name));
if (tbcol.IsDesc) sbalter.Append(" DESC");
sbalter.Append(", ");
}
sbalter.Remove(sbalter.Length - 2, 2).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
var tablename = tboldname == null ? _commonUtils.QuoteSqlName(tbname[0], tbname[1]) : _commonUtils.QuoteSqlName(tboldname[0], tboldname[1]);
var tmptablename = _commonUtils.QuoteSqlName(tbname[0], $"FreeSqlTmp_{tbname[1]}");
//创建临时表
sb.Append("CREATE TABLE IF NOT EXISTS ").Append(tmptablename).Append(" ( ");
foreach (var tbcol in tb.ColumnsByPosition)
{
sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType);
if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sb.Append(" AUTO_INCREMENT");
if (string.IsNullOrEmpty(tbcol.Comment) == false) sb.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment));
sb.Append(",");
}
if (tb.Primarys.Any())
{
sb.Append(" \r\n PRIMARY KEY (");
foreach (var tbcol in tb.Primarys) sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
sb.Remove(sb.Length - 2, 2).Append("),");
}
sb.Remove(sb.Length - 1, 1);
sb.Append("\r\n) Engine=InnoDB;\r\n");
sb.Append("INSERT INTO ").Append(tmptablename).Append(" (");
foreach (var tbcol in tb.ColumnsByPosition)
sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
sb.Remove(sb.Length - 2, 2).Append(")\r\nSELECT ");
foreach (var tbcol in tb.ColumnsByPosition)
{
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 = $"ifnull({insertvalue},{tbcol.DbDefaultValue})";
}
else if (tbcol.Attribute.IsNullable == false)
if (tbcol.DbDefaultValue != "NULL" && tbcol.Attribute.IsIdentity == false)
insertvalue = tbcol.DbDefaultValue;
sb.Append(insertvalue).Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append(" FROM ").Append(tablename).Append(";\r\n");
sb.Append("DROP TABLE ").Append(tablename).Append(";\r\n");
sb.Append("ALTER TABLE ").Append(tmptablename).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName(tbname[0], tbname[1])).Append(";\r\n");
//创建表的索引
foreach (var uk in tb.Indexes)
{
sb.Append("CREATE ");
if (uk.IsUnique) sb.Append("UNIQUE ");
sb.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(tablename).Append("(");
foreach (var tbcol in uk.Columns)
{
sb.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name));
if (tbcol.IsDesc) sb.Append(" DESC");
sb.Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append(");\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);
}
}
}
}
}
Reference in New Issue View Git Blame Copy Permalink