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dcf1da36d4
- 增加 PostgreSQL 的 Odbc 访问提供，相比 FreeSql.Provider.PostgreSQL 支持的类型更少； - 增加 通用的 Odbc 访问提供，不能迁移实体到数据库，不能 Skip 这样来分页，理论上能 crud 所有 odbc 数据库；
342 lines
25 KiB
C#
342 lines
25 KiB
C#
using FreeSql.Internal;
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using FreeSql.Internal.Model;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.Odbc;
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using System.Linq;
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using System.Text;
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namespace FreeSql.Odbc.PostgreSQL
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{
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class OdbcPostgreSQLCodeFirst : Internal.CommonProvider.CodeFirstProvider
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{
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public override bool IsNoneCommandParameter { get => true; set => base.IsNoneCommandParameter = true; }
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public OdbcPostgreSQLCodeFirst(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression) : base(orm, commonUtils, commonExpression) { }
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static object _dicCsToDbLock = new object();
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static Dictionary<string, (OdbcType type, string dbtype, string dbtypeFull, bool? isUnsigned, bool? isnullable, object defaultValue)> _dicCsToDb = new Dictionary<string, (OdbcType type, string dbtype, string dbtypeFull, bool? isUnsigned, bool? isnullable, object defaultValue)>() {
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{ typeof(sbyte).FullName, (OdbcType.SmallInt, "int2","int2 NOT NULL", false, false, 0) },{ typeof(sbyte?).FullName, (OdbcType.SmallInt, "int2", "int2", false, true, null) },
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{ typeof(short).FullName, (OdbcType.SmallInt, "int2","int2 NOT NULL", false, false, 0) },{ typeof(short?).FullName, (OdbcType.SmallInt, "int2", "int2", false, true, null) },
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{ typeof(int).FullName, (OdbcType.Int, "int4","int4 NOT NULL", false, false, 0) },{ typeof(int?).FullName, (OdbcType.Int, "int4", "int4", false, true, null) },
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{ typeof(long).FullName, (OdbcType.BigInt, "int8","int8 NOT NULL", false, false, 0) },{ typeof(long?).FullName, (OdbcType.BigInt, "int8", "int8", false, true, null) },
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{ typeof(byte).FullName, (OdbcType.SmallInt, "int2","int2 NOT NULL", false, false, 0) },{ typeof(byte?).FullName, (OdbcType.SmallInt, "int2", "int2", false, true, null) },
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{ typeof(ushort).FullName, (OdbcType.Int, "int4","int4 NOT NULL", false, false, 0) },{ typeof(ushort?).FullName, (OdbcType.Int, "int4", "int4", false, true, null) },
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{ typeof(uint).FullName, (OdbcType.BigInt, "int8","int8 NOT NULL", false, false, 0) },{ typeof(uint?).FullName, (OdbcType.BigInt, "int8", "int8", false, true, null) },
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{ typeof(ulong).FullName, (OdbcType.Numeric, "numeric","numeric(20,0) NOT NULL", false, false, 0) },{ typeof(ulong?).FullName, (OdbcType.Numeric, "numeric", "numeric(20,0)", false, true, null) },
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{ typeof(float).FullName, (OdbcType.Real, "float4","float4 NOT NULL", false, false, 0) },{ typeof(float?).FullName, (OdbcType.Real, "float4", "float4", false, true, null) },
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{ typeof(double).FullName, (OdbcType.Double, "float8","float8 NOT NULL", false, false, 0) },{ typeof(double?).FullName, (OdbcType.Double, "float8", "float8", false, true, null) },
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{ typeof(decimal).FullName, (OdbcType.Numeric, "numeric", "numeric(10,2) NOT NULL", false, false, 0) },{ typeof(decimal?).FullName, (OdbcType.Numeric, "numeric", "numeric(10,2)", false, true, null) },
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{ typeof(string).FullName, (OdbcType.VarChar, "varchar", "varchar(255)", false, null, "") },
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{ typeof(TimeSpan).FullName, (OdbcType.Time, "time","time NOT NULL", false, false, 0) },{ typeof(TimeSpan?).FullName, (OdbcType.Time, "time", "time",false, true, null) },
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{ typeof(DateTime).FullName, (OdbcType.DateTime, "timestamp", "timestamp NOT NULL", false, false, new DateTime(1970,1,1)) },{ typeof(DateTime?).FullName, (OdbcType.DateTime, "timestamp", "timestamp", false, true, null) },
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{ typeof(bool).FullName, (OdbcType.Bit, "bool","bool NOT NULL", null, false, false) },{ typeof(bool?).FullName, (OdbcType.Bit, "bool","bool", null, true, null) },
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{ typeof(Byte[]).FullName, (OdbcType.VarBinary, "bytea", "bytea", false, null, new byte[0]) },
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{ typeof(Guid).FullName, (OdbcType.UniqueIdentifier, "uuid", "uuid NOT NULL", false, false, Guid.Empty) },{ typeof(Guid?).FullName, (OdbcType.UniqueIdentifier, "uuid", "uuid", false, true, null) },
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};
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public override (int type, string dbtype, string dbtypeFull, bool? isnullable, object defaultValue)? GetDbInfo(Type type)
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{
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var isarray = type.FullName != "System.Byte[]" && type.IsArray;
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var elementType = isarray ? type.GetElementType() : type;
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var info = GetDbInfoNoneArray(elementType);
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if (info == null) return null;
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return ((int)info.Value.type, info.Value.dbtype, info.Value.dbtypeFull, info.Value.isnullable, info.Value.defaultValue);
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}
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(OdbcType type, string dbtype, string dbtypeFull, bool? isnullable, object defaultValue)? GetDbInfoNoneArray(Type type)
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{
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if (_dicCsToDb.TryGetValue(type.FullName, out var trydc)) return new (OdbcType, string, string, bool?, object)?((trydc.type, trydc.dbtype, trydc.dbtypeFull, trydc.isnullable, trydc.defaultValue));
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if (type.IsArray) return null;
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var enumType = type.IsEnum ? type : null;
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if (enumType == null && type.IsNullableType() && type.GenericTypeArguments.Length == 1 && type.GenericTypeArguments.First().IsEnum) enumType = type.GenericTypeArguments.First();
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if (enumType != null)
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{
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var newItem = enumType.GetCustomAttributes(typeof(FlagsAttribute), false).Any() ?
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(OdbcType.Int, "int8", $"int8{(type.IsEnum ? " NOT NULL" : "")}", false, type.IsEnum ? false : true, Enum.GetValues(enumType).GetValue(0)) :
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(OdbcType.BigInt, "int4", $"int4{(type.IsEnum ? " NOT NULL" : "")}", false, type.IsEnum ? false : true, Enum.GetValues(enumType).GetValue(0));
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if (_dicCsToDb.ContainsKey(type.FullName) == false)
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{
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lock (_dicCsToDbLock)
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{
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if (_dicCsToDb.ContainsKey(type.FullName) == false)
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_dicCsToDb.Add(type.FullName, newItem);
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}
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}
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return (newItem.Item1, newItem.Item2, newItem.Item3, newItem.Item5, newItem.Item6);
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}
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return null;
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}
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public override string GetComparisonDDLStatements(params Type[] entityTypes)
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{
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var sb = new StringBuilder();
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var seqcols = new List<(ColumnInfo, string[], bool)>(); //序列
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foreach (var entityType in entityTypes)
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{
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if (sb.Length > 0) sb.Append("\r\n");
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var tb = _commonUtils.GetTableByEntity(entityType);
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if (tb == null) throw new Exception($"类型 {entityType.FullName} 不可迁移");
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if (tb.Columns.Any() == false) throw new Exception($"类型 {entityType.FullName} 不可迁移，可迁移属性0个");
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var tbname = tb.DbName.Split(new[] { '.' }, 2);
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if (tbname?.Length == 1) tbname = new[] { "public", tbname[0] };
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var tboldname = tb.DbOldName?.Split(new[] { '.' }, 2); //旧表名
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if (tboldname?.Length == 1) tboldname = new[] { "public", tboldname[0] };
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if (string.Compare(tbname[0], "public", true) != 0 && _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from pg_namespace where nspname={0}", tbname[0])) == null) //创建模式
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sb.Append("CREATE SCHEMA IF NOT EXISTS ").Append(tbname[0]).Append(";\r\n");
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var sbalter = new StringBuilder();
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var istmpatler = false; //创建临时表，导入数据，删除旧表，修改
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if (_orm.Ado.ExecuteScalar(CommandType.Text, string.Format(" select 1 from pg_tables a inner join pg_namespace b on b.nspname = a.schemaname where b.nspname || '.' || a.tablename = '{0}.{1}'", tbname)) == null)
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{ //表不存在
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if (tboldname != null)
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{
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if (_orm.Ado.ExecuteScalar(CommandType.Text, string.Format(" select 1 from pg_tables a inner join pg_namespace b on b.nspname = a.schemaname where b.nspname || '.' || a.tablename = '{0}.{1}'", tboldname)) == null)
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//旧表不存在
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tboldname = null;
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}
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if (tboldname == null)
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{
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//创建表
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sb.Append("CREATE TABLE IF NOT EXISTS ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ( ");
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foreach (var tbcol in tb.ColumnsByPosition)
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{
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sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType).Append(",");
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if (tbcol.Attribute.IsIdentity == true) seqcols.Add((tbcol, tbname, true));
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}
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if (tb.Primarys.Any())
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{
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sb.Append(" \r\n CONSTRAINT ").Append(tbname[0]).Append("_").Append(tbname[1]).Append("_pkey PRIMARY KEY (");
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foreach (var tbcol in tb.Primarys) sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
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sb.Remove(sb.Length - 2, 2).Append("),");
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}
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foreach (var uk in tb.Uniques)
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{
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sb.Append(" \r\n CONSTRAINT ").Append(_commonUtils.QuoteSqlName(uk.Key)).Append(" UNIQUE(");
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foreach (var tbcol in uk.Value) sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
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sb.Remove(sb.Length - 2, 2).Append("),");
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}
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sb.Remove(sb.Length - 1, 1);
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sb.Append("\r\n) WITH (OIDS=FALSE);\r\n");
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//备注
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foreach (var tbcol in tb.ColumnsByPosition)
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{
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if (string.IsNullOrEmpty(tbcol.Comment) == false)
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sb.Append("COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)).Append(";\r\n");
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}
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continue;
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}
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//如果新表，旧表在一个数据库和模式下，直接修改表名
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if (string.Compare(tbname[0], tboldname[0], true) == 0)
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sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}")).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName($"{tbname[1]}")).Append(";\r\n");
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else
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{
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//如果新表，旧表不在一起，创建新表，导入数据，删除旧表
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istmpatler = true;
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}
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}
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else
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tboldname = null; //如果新表已经存在，不走改表名逻辑
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//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
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var sql = _commonUtils.FormatSql(@"
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select
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a.attname,
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t.typname,
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case when a.atttypmod > 0 and a.atttypmod < 32767 then a.atttypmod - 4 else a.attlen end len,
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case when t.typelem > 0 and t.typinput::varchar = 'array_in' then t2.typname else t.typname end,
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case when a.attnotnull then '0' else '1' end as is_nullable,
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e.adsrc,
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a.attndims,
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d.description as comment
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from pg_class c
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inner join pg_attribute a on a.attnum > 0 and a.attrelid = c.oid
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inner join pg_type t on t.oid = a.atttypid
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left join pg_type t2 on t2.oid = t.typelem
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left join pg_description d on d.objoid = a.attrelid and d.objsubid = a.attnum
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left join pg_attrdef e on e.adrelid = a.attrelid and e.adnum = a.attnum
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inner join pg_namespace ns on ns.oid = c.relnamespace
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inner join pg_namespace ns2 on ns2.oid = t.typnamespace
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where ns.nspname = {0} and c.relname = {1}", tboldname ?? tbname);
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var ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
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var tbstruct = ds.ToDictionary(a => string.Concat(a[0]), a =>
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{
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var attndims = int.Parse(string.Concat(a[6]));
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var type = string.Concat(a[1]);
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var sqlType = string.Concat(a[3]);
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var max_length = long.Parse(string.Concat(a[2]));
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switch (sqlType.ToLower())
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{
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case "bool": case "name": case "bit": case "varbit": case "bpchar": case "varchar": case "bytea": case "text": case "uuid": break;
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default: max_length *= 8; break;
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}
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if (type.StartsWith("_"))
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{
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type = type.Substring(1);
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if (attndims == 0) attndims++;
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}
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if (sqlType.StartsWith("_")) sqlType = sqlType.Substring(1);
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return new
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{
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column = string.Concat(a[0]),
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sqlType = string.Concat(sqlType),
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max_length = long.Parse(string.Concat(a[2])),
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is_nullable = string.Concat(a[4]) == "1",
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is_identity = string.Concat(a[5]).StartsWith(@"nextval('") && string.Concat(a[5]).EndsWith(@"'::regclass)"),
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attndims,
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comment = string.Concat(a[7])
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};
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}, StringComparer.CurrentCultureIgnoreCase);
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if (istmpatler == false)
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{
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foreach (var tbcol in tb.ColumnsByPosition)
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{
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if (tbstruct.TryGetValue(tbcol.Attribute.Name, out var tbstructcol) ||
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string.IsNullOrEmpty(tbcol.Attribute.OldName) == false && tbstruct.TryGetValue(tbcol.Attribute.OldName, out tbstructcol))
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{
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var isCommentChanged = tbstructcol.comment != (tbcol.Comment ?? "");
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if (tbcol.Attribute.DbType.StartsWith(tbstructcol.sqlType, StringComparison.CurrentCultureIgnoreCase) == false ||
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tbcol.Attribute.DbType.Contains("[]") != (tbstructcol.attndims > 0))
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sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ALTER COLUMN ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" TYPE ").Append(tbcol.Attribute.DbType.Split(' ').First()).Append(";\r\n");
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if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable)
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{
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if (tbcol.Attribute.IsNullable != true || tbcol.Attribute.IsNullable == true && tbcol.Attribute.IsPrimary == false)
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sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ALTER COLUMN ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(tbcol.Attribute.IsNullable == true ? "DROP" : "SET").Append(" NOT NULL;\r\n");
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}
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if (tbcol.Attribute.IsIdentity != tbstructcol.is_identity)
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seqcols.Add((tbcol, tbname, tbcol.Attribute.IsIdentity == true));
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if (string.Compare(tbstructcol.column, tbcol.Attribute.OldName, true) == 0)
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//修改列名
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sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" RENAME COLUMN ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" TO ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(";\r\n");
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if (isCommentChanged)
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sbalter.Append("COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)).Append(";\r\n");
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continue;
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}
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//添加列
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sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ADD COLUMN ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType.Split(' ').First()).Append(";\r\n");
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sbalter.Append("UPDATE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" SET ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" = ").Append(_commonUtils.FormatSql("{0};\r\n", tbcol.Attribute.DbDefautValue));
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if (tbcol.Attribute.IsNullable == false) sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ALTER COLUMN ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" SET NOT NULL;\r\n");
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if (tbcol.Attribute.IsIdentity == true) seqcols.Add((tbcol, tbname, tbcol.Attribute.IsIdentity == true));
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if (string.IsNullOrEmpty(tbcol.Comment) == false) sbalter.Append("COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)).Append(";\r\n");
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}
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var dsuksql = _commonUtils.FormatSql(@"
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select
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c.attname,
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b.relname
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from pg_index a
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inner join pg_class b on b.oid = a.indexrelid
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inner join pg_attribute c on c.attnum > 0 and c.attrelid = b.oid
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inner join pg_namespace ns on ns.oid = b.relnamespace
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inner join pg_class d on d.oid = a.indrelid
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where ns.nspname in ({0}) and d.relname in ({1}) and a.indisunique = 't'", tboldname ?? tbname);
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var dsuk = _orm.Ado.ExecuteArray(CommandType.Text, dsuksql).Select(a => new[] { string.Concat(a[0]), string.Concat(a[1]) });
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foreach (var uk in tb.Uniques)
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{
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if (string.IsNullOrEmpty(uk.Key) || uk.Value.Any() == false) continue;
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var dsukfind1 = dsuk.Where(a => string.Compare(a[1], uk.Key, true) == 0).ToArray();
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if (dsukfind1.Any() == false || dsukfind1.Length != uk.Value.Count || dsukfind1.Where(a => uk.Value.Where(b => string.Compare(b.Attribute.Name, a[0], true) == 0).Any()).Count() != uk.Value.Count)
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{
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if (dsukfind1.Any()) sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" DROP CONSTRAINT ").Append(_commonUtils.QuoteSqlName(uk.Key)).Append(";\r\n");
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sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ADD CONSTRAINT ").Append(_commonUtils.QuoteSqlName(uk.Key)).Append(" UNIQUE(");
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foreach (var tbcol in uk.Value) sbalter.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
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sbalter.Remove(sbalter.Length - 2, 2).Append(");\r\n");
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}
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}
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}
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if (istmpatler == false)
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{
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sb.Append(sbalter);
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continue;
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}
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var oldpk = _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(@"select pg_constraint.conname as pk_name from pg_constraint
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inner join pg_class on pg_constraint.conrelid = pg_class.oid
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inner join pg_namespace on pg_namespace.oid = pg_class.relnamespace
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where pg_namespace.nspname={0} and pg_class.relname={1} and pg_constraint.contype='p'
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", tbname))?.ToString();
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if (string.IsNullOrEmpty(oldpk) == false)
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sb.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" DROP CONSTRAINT ").Append(oldpk).Append(";\r\n");
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//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
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var tablename = tboldname == null ? _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}") : _commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}");
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var tmptablename = _commonUtils.QuoteSqlName($"{tbname[0]}.FreeSqlTmp_{tbname[1]}");
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//创建临时表
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sb.Append("CREATE TABLE IF NOT EXISTS ").Append(tmptablename).Append(" ( ");
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foreach (var tbcol in tb.ColumnsByPosition)
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{
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sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType).Append(",");
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if (tbcol.Attribute.IsIdentity == true) seqcols.Add((tbcol, tbname, true));
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}
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if (tb.Primarys.Any())
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{
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sb.Append(" \r\n CONSTRAINT ").Append(tbname[0]).Append("_").Append(tbname[1]).Append("_pkey PRIMARY KEY (");
|
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foreach (var tbcol in tb.Primarys) sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
|
||
sb.Remove(sb.Length - 2, 2).Append("),");
|
||
}
|
||
foreach (var uk in tb.Uniques)
|
||
{
|
||
sb.Append(" \r\n CONSTRAINT ").Append(_commonUtils.QuoteSqlName(uk.Key)).Append(" UNIQUE(");
|
||
foreach (var tbcol in uk.Value) sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
|
||
sb.Remove(sb.Length - 2, 2).Append("),");
|
||
}
|
||
sb.Remove(sb.Length - 1, 1);
|
||
sb.Append("\r\n) WITH (OIDS=FALSE);\r\n");
|
||
//备注
|
||
foreach (var tbcol in tb.ColumnsByPosition)
|
||
{
|
||
if (string.IsNullOrEmpty(tbcol.Comment) == false)
|
||
sb.Append("COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.FreeSqlTmp_{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)).Append(";\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 = $"coalesce({insertvalue},{_commonUtils.FormatSql("{0}", tbcol.Attribute.DbDefautValue)})";
|
||
}
|
||
else if (tbcol.Attribute.IsNullable == false)
|
||
insertvalue = _commonUtils.FormatSql("{0}", tbcol.Attribute.DbDefautValue);
|
||
sb.Append(insertvalue).Append(", ");
|
||
}
|
||
sb.Remove(sb.Length - 2, 2).Append(" FROM ").Append(tablename).Append(";\r\n");
|
||
sb.Append("DROP TABLE ").Append(tablename).Append(";\r\n");
|
||
sb.Append("ALTER TABLE ").Append(tmptablename).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName(tbname[1])).Append(";\r\n");
|
||
}
|
||
foreach (var seqcol in seqcols)
|
||
{
|
||
var tbname = seqcol.Item2;
|
||
var seqname = Utils.GetCsName($"{tbname[0]}.{tbname[1]}_{seqcol.Item1.Attribute.Name}_sequence_name");
|
||
var tbname2 = _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}");
|
||
var colname2 = _commonUtils.QuoteSqlName(seqcol.Item1.Attribute.Name);
|
||
sb.Append("ALTER TABLE ").Append(tbname2).Append(" ALTER COLUMN ").Append(colname2).Append(" SET DEFAULT null;\r\n");
|
||
sb.Append("DROP SEQUENCE IF EXISTS ").Append(seqname).Append(";\r\n");
|
||
if (seqcol.Item3)
|
||
{
|
||
sb.Append("CREATE SEQUENCE ").Append(seqname).Append(";\r\n");
|
||
sb.Append("ALTER TABLE ").Append(tbname2).Append(" ALTER COLUMN ").Append(colname2).Append(" SET DEFAULT nextval('").Append(seqname).Append("'::regclass);\r\n");
|
||
sb.Append(" SELECT case when max(").Append(colname2).Append(") is null then 0 else setval('").Append(seqname).Append("', max(").Append(colname2).Append(")) end FROM ").Append(tbname2).Append(";\r\n");
|
||
}
|
||
}
|
||
return sb.Length == 0 ? null : sb.ToString();
|
||
}
|
||
}
|
||
} |