byte _SplitSourceByIdentityValueIsNullFlag = 0; //防止重复计算 SplitSource
/// <summary>
/// 如果实体类有自增属性，分成两个 List，有值的Item1 merge，无值的Item2 insert
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public NaviteTuple <List <T1>, List <T1> > SplitSourceByIdentityValueIsNull(List <T1> source)
{
if (_SplitSourceByIdentityValueIsNullFlag == 1)
{
return(NaviteTuple.Create(source, new List <T1>()));
}
if (_SplitSourceByIdentityValueIsNullFlag == 2)
{
return(NaviteTuple.Create(new List <T1>(), source));
}
if (IdentityColumn == null)
{
return(NaviteTuple.Create(source, new List <T1>()));
}
var ret = NaviteTuple.Create(new List <T1>(), new List <T1>());
foreach (var item in source)
{
if (object.Equals(_orm.GetEntityValueWithPropertyName(_table.Type, item, IdentityColumn.CsName), IdentityColumn.CsType.CreateInstanceGetDefaultValue()))
{
ret.Item2.Add(item); //自增无值的，记录为直接插入
}
else
{
ret.Item1.Add(item);
}
}
return(ret);
}
public DataTable ToDataTable()
{
var dt = new DataTable();
dt.TableName = TableRuleInvoke();
var dtCols = new List <NaviteTuple <ColumnInfo, Type, bool> >();
foreach (var col in _table.ColumnsByPosition)
{
if (col.Attribute.IsIdentity && _insertIdentity == false)
{
continue;
}
if (col.Attribute.IsIdentity == false && _ignore.ContainsKey(col.Attribute.Name))
{
continue;
}
dt.Columns.Add(col.Attribute.Name, col.Attribute.MapType.NullableTypeOrThis());
dtCols.Add(NaviteTuple.Create(col, col.Attribute.MapType.NullableTypeOrThis(), col.Attribute.MapType.IsNullableType()));
}
if (dt.Columns.Count == 0)
{
return(dt);
}
var didx = 0;
foreach (var d in _source)
{
var row = new object[dt.Columns.Count];
var rowIndex = 0;
foreach (var col in dtCols)
{
var val = col.Item1.GetMapValue(d);
if (col.Item3 == true)
{
//if (val == null) throw new Exception($"[{didx}].{col.Item1.CsName} 值不可为 null；DataTable 限制不可使用 int?/long? 可空类型，IInsert.ToDataTable 将映射成 int/long，因此不可接受 null 值");
if (val == null)
{
val = DBNull.Value;
}
else
{
val = Utils.GetDataReaderValue(col.Item2, val);
}
}
row[rowIndex++] = val;
}
dt.Rows.Add(row);
didx++;
}
return(dt);
}
protected override string GetComparisonDDLStatements(params TypeAndName[] objects)
{
var userId = (_orm.Ado.MasterPool as OracleConnectionPool)?.UserId;
if (string.IsNullOrEmpty(userId))
{
using (var conn = _orm.Ado.MasterPool.Get())
{
userId = OracleConnectionPool.GetUserId(conn.Value.ConnectionString);
}
}
var seqcols = new List <NaviteTuple <ColumnInfo, string[], bool> >(); //序列：列，表，自增
var seqnameDel = new List <string>(); //要删除的序列+触发器
var sb = new StringBuilder();
var sbDeclare = new StringBuilder();
foreach (var obj in objects)
{
if (sb.Length > 0)
{
sb.Append("\r\n");
}
var tb = _commonUtils.GetTableByEntity(obj.entityType);
if (tb == null)
{
throw new Exception($"类型 {obj.entityType.FullName} 不可迁移");
}
if (tb.Columns.Any() == false)
{
throw new Exception($"类型 {obj.entityType.FullName} 不可迁移，可迁移属性0个");
}
var tbname = _commonUtils.SplitTableName(tb.DbName);
if (tbname?.Length == 1)
{
tbname = new[] { userId, tbname[0] }
}
;
var tboldname = _commonUtils.SplitTableName(tb.DbOldName); //旧表名
if (tboldname?.Length == 1)
{
tboldname = new[] { userId, tboldname[0] }
}
;
var primaryKeyName = (obj.entityType.GetCustomAttributes(typeof(OraclePrimaryKeyNameAttribute), false)?.FirstOrDefault() as OraclePrimaryKeyNameAttribute)?.Name;
if (string.IsNullOrEmpty(obj.tableName) == false)
{
var tbtmpname = _commonUtils.SplitTableName(obj.tableName);
if (tbtmpname?.Length == 1)
{
tbtmpname = new[] { userId, tbtmpname[0] }
}
;
if (tbname[0] != tbtmpname[0] || tbname[1] != tbtmpname[1])
{
tbname = tbtmpname;
tboldname = null;
primaryKeyName = null;
}
}
//codefirst 不支持表名中带 .
if (string.Compare(tbname[0], userId) != 0 && _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from sys.dba_users where username={0}", tbname[0])) == null) //创建数据库
{
throw new NotImplementedException($"Oracle CodeFirst 不支持代码创建 tablespace 与 schemas {tbname[0]}");
}
var sbalter = new StringBuilder();
var istmpatler = false; //创建临时表，导入数据，删除旧表，修改
if (_orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from all_tab_comments where owner={0} and table_name={1}", tbname)) == null)
{ //表不存在
if (tboldname != null)
{
if (_orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from all_tab_comments where owner={0} and table_name={1}", tboldname)) == null)
{
//模式或表不存在
tboldname = null;
}
}
if (tboldname == null)
{
//创建表
var createTableName = _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}");
sb.Append("execute immediate 'CREATE TABLE ").Append(createTableName).Append(" ( ");
foreach (var tbcol in tb.ColumnsByPosition)
{
sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType).Append(",");
if (tbcol.Attribute.IsIdentity == true)
{
seqcols.Add(NaviteTuple.Create(tbcol, tbname, true));
}
}
if (tb.Primarys.Any())
{
var pkname = primaryKeyName ?? $"{tbname[0]}_{tbname[1]}_pk1";
sb.Append(" \r\n CONSTRAINT ").Append(pkname).Append(" PRIMARY KEY (");
foreach (var tbcol in tb.Primarys)
{
sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append("),");
}
sb.Remove(sb.Length - 1, 1);
sb.Append("\r\n) \r\nLOGGING \r\nNOCOMPRESS \r\nNOCACHE\r\n';\r\n");
//创建表的索引
foreach (var uk in tb.Indexes)
{
sb.Append("execute immediate 'CREATE ");
if (uk.IsUnique)
{
sb.Append("UNIQUE ");
}
sb.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(createTableName).Append("(");
foreach (var tbcol in uk.Columns)
{
sb.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name));
if (tbcol.IsDesc)
{
sb.Append(" DESC");
}
sb.Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append(")';\r\n");
}
//备注
foreach (var tbcol in tb.ColumnsByPosition)
{
if (string.IsNullOrEmpty(tbcol.Comment) == false)
{
sb.Append("execute immediate 'COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment).Replace("'", "''")).Append("';\r\n");
}
}
continue;
}
//如果新表，旧表在一个模式下，直接修改表名
if (string.Compare(tbname[0], tboldname[0], true) == 0)
{
sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}")).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName($"{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($@"
select
a.column_name,
a.data_type,
a.data_length,
a.data_precision,
a.data_scale,
a.char_used,
case when a.nullable = 'N' then 0 else 1 end,
nvl((select 1 from user_sequences where sequence_name='{Utils.GetCsName((tboldname ?? tbname).Last())}_seq_'||a.column_name), 0),
nvl((select 1 from user_triggers where trigger_name='{Utils.GetCsName((tboldname ?? tbname).Last())}_seq_'||a.column_name||'TI'), 0),
b.comments
from all_tab_columns a
left join all_col_comments b on b.owner = a.owner and b.table_name = a.table_name and b.column_name = a.column_name
where a.owner={{0}} and a.table_name={{1}}", tboldname ?? tbname);
var ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
var tbstruct = ds.ToDictionary(a => string.Concat(a[0]), a =>
{
var sqlType = GetOracleSqlTypeFullName(a);
return(new
{
column = string.Concat(a[0]),
sqlType,
is_nullable = string.Concat(a[6]) == "1",
is_identity = string.Concat(a[7]) == "1" && string.Concat(a[8]) == "1",
comment = string.Concat(a[9])
});
}, StringComparer.CurrentCultureIgnoreCase);
if (istmpatler == false)
{
foreach (var tbcol in tb.ColumnsByPosition)
{
var dbtypeNoneNotNull = Regex.Replace(tbcol.Attribute.DbType, @"NOT\s+NULL", "NULL");
if (tbstruct.TryGetValue(tbcol.Attribute.Name, out var tbstructcol) ||
string.IsNullOrEmpty(tbcol.Attribute.OldName) == false && tbstruct.TryGetValue(tbcol.Attribute.OldName, out tbstructcol))
{
var isCommentChanged = tbstructcol.comment != (tbcol.Comment ?? "");
if (tbcol.Attribute.DbType.StartsWith(tbstructcol.sqlType, StringComparison.CurrentCultureIgnoreCase) == false)
{
istmpatler = true;
}
//sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" MODIFY (").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(dbtypeNoneNotNull).Append(")';\r\n");
if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable)
{
if (tbcol.Attribute.IsNullable == false)
{
sbalter.Append("execute immediate 'UPDATE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" SET ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" = ").Append(tbcol.DbDefaultValue.Replace("'", "''")).Append(" WHERE ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" IS NULL';\r\n");
}
sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" MODIFY ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(tbcol.Attribute.IsNullable == true ? "" : "NOT").Append(" NULL';\r\n");
}
if (string.Compare(tbstructcol.column, tbcol.Attribute.OldName, true) == 0)
{
if (tbstructcol.is_identity)
{
seqnameDel.Add(Utils.GetCsName($"{tbname[1]}_seq_{tbstructcol.column}"));
}
//修改列名
sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" RENAME COLUMN ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" TO ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append("';\r\n");
if (tbcol.Attribute.IsIdentity)
{
seqcols.Add(NaviteTuple.Create(tbcol, tbname, tbcol.Attribute.IsIdentity == true));
}
}
else if (tbcol.Attribute.IsIdentity != tbstructcol.is_identity)
{
seqcols.Add(NaviteTuple.Create(tbcol, tbname, tbcol.Attribute.IsIdentity == true));
}
if (isCommentChanged)
{
sbalter.Append("execute immediate 'COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? "").Replace("'", "''")).Append("';\r\n");
}
continue;
}
//添加列
sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ADD (").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(dbtypeNoneNotNull).Append(")';\r\n");
if (tbcol.Attribute.IsNullable == false)
{
sbalter.Append("execute immediate 'UPDATE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" SET ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" = ").Append(tbcol.DbDefaultValue.Replace("'", "''")).Append("';\r\n");
sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" MODIFY ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" NOT NULL';\r\n");
}
if (tbcol.Attribute.IsIdentity == true)
{
seqcols.Add(NaviteTuple.Create(tbcol, tbname, tbcol.Attribute.IsIdentity == true));
}
if (string.IsNullOrEmpty(tbcol.Comment) == false)
{
sbalter.Append("execute immediate 'COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? "").Replace("'", "''")).Append("';\r\n");
}
}
CreateOracleFunction(_orm);
var dsuksql = _commonUtils.FormatSql(@"
select
nvl(freesql_long_2_varchar(a.index_name, c.table_name, c.column_position), c.column_name),
a.index_name,
case when c.descend = 'DESC' then 1 else 0 end,
case when a.uniqueness = 'UNIQUE' then 1 else 0 end
from all_indexes a,
all_ind_columns c
where a.index_name = c.index_name
and a.table_owner = c.table_owner
and a.table_name = c.table_name
and a.owner in ({0}) and a.table_name in ({1})
and not exists(select 1 from all_constraints where constraint_name = a.index_name and constraint_type = 'P')", tboldname ?? tbname);
var dsuk = _orm.Ado.ExecuteArray(CommandType.Text, dsuksql).Select(a => new[] { string.Concat(a[0]).Trim('"'), string.Concat(a[1]), string.Concat(a[2]), string.Concat(a[3]) }).ToArray();
foreach (var uk in tb.Indexes)
{
if (string.IsNullOrEmpty(uk.Name) || uk.Columns.Any() == false)
{
continue;
}
var dsukfind1 = dsuk.Where(a => string.Compare(a[1], uk.Name, true) == 0).ToArray();
if (dsukfind1.Any() == false || dsukfind1.Length != uk.Columns.Length || dsukfind1.Where(a => uk.Columns.Where(b => (a[3] == "1") == uk.IsUnique && string.Compare(b.Column.Attribute.Name, a[0], true) == 0 && (a[2] == "1") == b.IsDesc).Any()).Count() != uk.Columns.Length)
{
if (dsukfind1.Any())
{
sbalter.Append("execute immediate 'DROP INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append("';\r\n");
}
sbalter.Append("execute immediate 'CREATE ");
if (uk.IsUnique)
{
sbalter.Append("UNIQUE ");
}
sbalter.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(_commonUtils.QuoteSqlName($"{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;
}
var oldpk = _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(@" select constraint_name from user_constraints where owner={0} and table_name={1} and constraint_type='P'", tbname))?.ToString();
if (string.IsNullOrEmpty(oldpk) == false)
{
sb.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" DROP CONSTRAINT ").Append(oldpk).Append("';\r\n");
}
//创建临时表，数据导进临时表，然后删除原表，将临时表改名为原表名
var tablename = tboldname == null?_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}") : _commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}");
var tmptablename = _commonUtils.QuoteSqlName($"{tbname[0]}.FTmp_{tbname[1]}");
//创建临时表
sb.Append("execute immediate 'CREATE TABLE ").Append(tmptablename).Append(" ( ");
foreach (var tbcol in tb.ColumnsByPosition)
{
sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType).Append(",");
if (tbcol.Attribute.IsIdentity == true)
{
seqcols.Add(NaviteTuple.Create(tbcol, tbname, true));
}
}
if (tb.Primarys.Any())
{
var pkname = primaryKeyName ?? $"{tbname[0]}_{tbname[1]}_pk2";
sb.Append(" \r\n CONSTRAINT ").Append(pkname).Append(" PRIMARY KEY (");
foreach (var tbcol in tb.Primarys)
{
sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append("),");
}
sb.Remove(sb.Length - 1, 1);
sb.Append("\r\n) LOGGING \r\nNOCOMPRESS \r\nNOCACHE\r\n';\r\n");
//备注
foreach (var tbcol in tb.ColumnsByPosition)
{
if (string.IsNullOrEmpty(tbcol.Comment) == false)
{
sb.Append("execute immediate 'COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.FTmp_{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment).Replace("'", "''")).Append("';\r\n");
}
}
sb.Append("execute immediate '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)
{
var dbtypeNoneNotNull = Regex.Replace(tbcol.Attribute.DbType, @"(NOT\s+)?NULL", "");
insertvalue = $"cast({insertvalue} as {dbtypeNoneNotNull})";
}
if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable)
{
insertvalue = $"nvl({insertvalue},{tbcol.DbDefaultValue})";
}
}
else if (tbcol.Attribute.IsNullable == false)
{
insertvalue = tbcol.DbDefaultValue;
}
sb.Append(insertvalue.Replace("'", "''")).Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append(" FROM ").Append(tablename).Append("';\r\n");
sb.Append("execute immediate 'DROP TABLE ").Append(tablename).Append("';\r\n");
sb.Append("execute immediate 'ALTER TABLE ").Append(tmptablename).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName($"{tbname[1]}")).Append("';\r\n");
//创建表的索引
foreach (var uk in tb.Indexes)
{
sb.Append("execute immediate '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");
}
}
Dictionary <string, bool> dicDeclare = new Dictionary <string, bool>();
Action <string> dropSequence = seqname =>
{
if (dicDeclare.ContainsKey(seqname) == false)
{
sbDeclare.Append("\r\n").Append(seqname).Append("IS NUMBER; \r\n");
dicDeclare.Add(seqname, true);
}
sb.Append(seqname).Append("IS := 0; \r\n")
.Append(" select count(1) into ").Append(seqname).Append(_commonUtils.FormatSql("IS from user_sequences where sequence_name={0}; \r\n", seqname))
.Append("if ").Append(seqname).Append("IS > 0 then \r\n")
.Append(" execute immediate 'DROP SEQUENCE ").Append(_commonUtils.QuoteSqlName(seqname)).Append("';\r\n")
.Append("end if; \r\n");
};
Action <string> dropTrigger = tiggerName =>
{
if (dicDeclare.ContainsKey(tiggerName) == false)
{
sbDeclare.Append("\r\n").Append(tiggerName).Append("IS NUMBER; \r\n");
dicDeclare.Add(tiggerName, true);
}
sb.Append(tiggerName).Append("IS := 0; \r\n")
.Append(" select count(1) into ").Append(tiggerName).Append(_commonUtils.FormatSql("IS from user_triggers where trigger_name={0}; \r\n", tiggerName))
.Append("if ").Append(tiggerName).Append("IS > 0 then \r\n")
.Append(" execute immediate 'DROP TRIGGER ").Append(_commonUtils.QuoteSqlName(tiggerName)).Append("';\r\n")
.Append("end if; \r\n");
};
foreach (var seqname in seqnameDel)
{
dropSequence(seqname);
dropTrigger(seqname + "TI");
}
foreach (var seqcol in seqcols)
{
var tbname = seqcol.Item2;
var seqname = Utils.GetCsName($"{tbname[1]}_seq_{seqcol.Item1.Attribute.Name}");
var tiggerName = seqname + "TI";
var tbname2 = _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}");
var colname2 = _commonUtils.QuoteSqlName(seqcol.Item1.Attribute.Name);
dropSequence(seqname);
if (seqcol.Item3)
{
var startWith = _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from all_tab_columns where owner={0} and table_name={1} and column_name={2}", tbname[0], tbname[1], seqcol.Item1.Attribute.Name)) == null ? 1 :
_orm.Ado.ExecuteScalar(CommandType.Text, $" select nvl(max({colname2})+1,1) from {tbname2}");
sb.Append("execute immediate 'CREATE SEQUENCE ").Append(_commonUtils.QuoteSqlName(seqname)).Append(" start with ").Append(startWith).Append("';\r\n");
sb.Append("execute immediate 'CREATE OR REPLACE TRIGGER ").Append(_commonUtils.QuoteSqlName(tiggerName))
.Append(" \r\nbefore insert on ").Append(tbname2)
.Append(" \r\nfor each row \r\nbegin\r\nselect ").Append(_commonUtils.QuoteSqlName(seqname))
.Append(".nextval into :new.").Append(colname2).Append(" from dual;\r\nend;';\r\n");
}
else
{
dropTrigger(tiggerName);
}
}
if (sbDeclare.Length > 0)
{
sbDeclare.Insert(0, "declare ");
}
return(sb.Length == 0 ? null : sb.Insert(0, "BEGIN \r\n").Insert(0, sbDeclare.ToString()).Append("END;").ToString());
}
protected override string GetComparisonDDLStatements(params TypeAndName[] objects)
{
var sb = new StringBuilder();
var seqcols = new List <NaviteTuple <ColumnInfo, string[], bool> >(); //序列
foreach (var obj in objects)
{
if (sb.Length > 0)
{
sb.Append("\r\n");
}
var tb = _commonUtils.GetTableByEntity(obj.entityType);
if (tb == null)
{
throw new Exception($"类型 {obj.entityType.FullName} 不可迁移");
}
if (tb.Columns.Any() == false)
{
throw new Exception($"类型 {obj.entityType.FullName} 不可迁移，可迁移属性0个");
}
var tbname = _commonUtils.SplitTableName(tb.DbName);
if (tbname?.Length == 1)
{
tbname = new[] { "PUBLIC", tbname[0] }
}
;
var tboldname = _commonUtils.SplitTableName(tb.DbOldName); //旧表名
if (tboldname?.Length == 1)
{
tboldname = new[] { "PUBLIC", tboldname[0] }
}
;
if (string.IsNullOrEmpty(obj.tableName) == false)
{
var tbtmpname = _commonUtils.SplitTableName(obj.tableName);
if (tbtmpname?.Length == 1)
{
tbtmpname = new[] { "PUBLIC", tbtmpname[0] }
}
;
if (tbname[0] != tbtmpname[0] || tbname[1] != tbtmpname[1])
{
tbname = tbtmpname;
tboldname = null;
}
}
//codefirst 不支持表名、模式名、数据库名中带 .
if (string.Compare(tbname[0], "PUBLIC", true) != 0 && _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from sys_namespace where nspname={0}", tbname[0])) == null) //创建模式
{
sb.Append("CREATE SCHEMA IF NOT EXISTS ").Append(tbname[0]).Append(";\r\n");
}
var sbalter = new StringBuilder();
var istmpatler = false; //创建临时表，导入数据，删除旧表，修改
if (_orm.Ado.ExecuteScalar(CommandType.Text, string.Format(" select 1 from tables a inner join sys_namespace b on b.nspname = a.table_schem where b.nspname || '.' || a.table_name = '{0}.{1}'", tbname)) == null)
{ //表不存在
if (tboldname != null)
{
if (_orm.Ado.ExecuteScalar(CommandType.Text, string.Format(" select 1 from tables a inner join sys_namespace b on b.nspname = a.table_schem where b.nspname || '.' || a.table_name = '{0}.{1}'", tboldname)) == null)
{
//旧表不存在
tboldname = null;
}
}
if (tboldname == null)
{
//创建表
var createTableName = _commonUtils.QuoteSqlName($"{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).Append(",");
if (tbcol.Attribute.IsIdentity == true)
{
seqcols.Add(NaviteTuple.Create(tbcol, tbname, true));
}
}
if (tb.Primarys.Any())
{
var pkname = $"{tbname[0]}_{tbname[1]}_PKEY";
sb.Append(" \r\n CONSTRAINT ").Append(_commonUtils.QuoteSqlName(pkname)).Append(" PRIMARY KEY (");
foreach (var tbcol in tb.Primarys)
{
sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append("),");
}
sb.Remove(sb.Length - 1, 1);
sb.Append("\r\n) BINLOG ON;\r\n");
//创建表的索引
foreach (var uk in tb.Indexes)
{
sb.Append("CREATE ");
if (uk.IsUnique)
{
sb.Append("UNIQUE ");
}
sb.Append("INDEX ").Append(_commonUtils.QuoteSqlName(ReplaceIndexName(uk.Name, tbname[1]))).Append(" ON ").Append(createTableName).Append("(");
foreach (var tbcol in uk.Columns)
{
sb.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name));
if (tbcol.IsDesc)
{
sb.Append(" DESC");
}
sb.Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append(");\r\n");
}
//备注
foreach (var tbcol in tb.ColumnsByPosition)
{
if (string.IsNullOrEmpty(tbcol.Comment) == false)
{
sb.Append("COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)).Append(";\r\n");
}
}
if (string.IsNullOrEmpty(tb.Comment) == false)
{
sb.Append("COMMENT ON TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tb.Comment)).Append(";\r\n");
}
continue;
}
//如果新表，旧表在一个数据库和模式下，直接修改表名
if (string.Compare(tbname[0], tboldname[0], true) == 0)
{
sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}")).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName($"{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.attname,
t.typname,
case when a.atttypmod > 0 and a.atttypmod < 32767 then a.atttypmod - 4 else a.attlen end len,
case when t.typelem > 0 and t.typinput = 'ARRAY_IN' then t2.typname else t.typname end,
case when a.attnotnull then '0' else '1' end as is_nullable,
--e.adsrc,
(select sys_get_expr(adbin, adrelid) from sys_attrdef where adrelid = e.adrelid limit 1) is_identity,
a.attndims,
d.description as comment
from sys_class c
inner join sys_attribute a on a.attnum > 0 and a.attrelid = c.oid
inner join sys_type t on t.oid = a.atttypid
left join sys_type t2 on t2.oid = t.typelem
left join sys_description d on d.objoid = a.attrelid and d.objsubid = a.attnum
left join sys_attrdef e on e.adrelid = a.attrelid and e.adnum = a.attnum
inner join sys_namespace ns on ns.oid = c.relnamespace
inner join sys_namespace ns2 on ns2.oid = t.typnamespace
where ns.nspname = {0} and c.relname = {1}", tboldname ?? tbname);
var ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
var tbstruct = ds.ToDictionary(a => string.Concat(a[0]), a =>
{
var attndims = int.Parse(string.Concat(a[6]));
var type = string.Concat(a[1]);
var sqlType = string.Concat(a[3]);
var max_length = long.Parse(string.Concat(a[2]));
switch (sqlType.ToLower())
{
case "bool":
case "name":
case "bit":
case "varbit":
case "bpchar":
case "varchar":
case "bytea":
case "text":
case "uuid": break;
default: max_length *= 8; break;
}
if (type.StartsWith("_"))
{
type = type.Substring(1);
if (attndims == 0)
{
attndims++;
}
}
if (sqlType.StartsWith("_"))
{
sqlType = sqlType.Substring(1);
}
return(new
{
column = string.Concat(a[0]),
sqlType = string.Concat(sqlType),
max_length = long.Parse(string.Concat(a[2])),
is_nullable = string.Concat(a[4]) == "1",
is_identity = string.Concat(a[5]).StartsWith(@"NEXTVAL('") && string.Concat(a[5]).EndsWith(@"'::text)"),
attndims,
comment = string.Concat(a[7])
});
}, StringComparer.CurrentCultureIgnoreCase);
if (istmpatler == false)
{
foreach (var tbcol in tb.ColumnsByPosition)
{
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 ?? "");
if (tbcol.Attribute.DbType.StartsWith(tbstructcol.sqlType, StringComparison.CurrentCultureIgnoreCase) == false ||
tbcol.Attribute.DbType.Contains("[]") != (tbstructcol.attndims > 0))
{
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");
}
if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable)
{
if (tbcol.Attribute.IsNullable != true || tbcol.Attribute.IsNullable == true && tbcol.Attribute.IsPrimary == false)
{
if (tbcol.Attribute.IsNullable == 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(" ALTER COLUMN ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(tbcol.Attribute.IsNullable == true ? "DROP" : "SET").Append(" NOT NULL;\r\n");
}
}
if (tbcol.Attribute.IsIdentity != tbstructcol.is_identity)
{
seqcols.Add(NaviteTuple.Create(tbcol, tbname, tbcol.Attribute.IsIdentity == true));
}
if (string.Compare(tbstructcol.column, tbcol.Attribute.OldName, true) == 0)
{
//修改列名
sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" RENAME COLUMN ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" TO ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(";\r\n");
}
if (isCommentChanged)
{
sbalter.Append("COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)).Append(";\r\n");
}
continue;
}
//添加列
sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ADD COLUMN ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType.Split(' ').First()).Append(";\r\n");
sbalter.Append("UPDATE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" SET ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" = ").Append(tbcol.DbDefaultValue).Append(";\r\n");
if (tbcol.Attribute.IsNullable == false)
{
sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ALTER COLUMN ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" SET NOT NULL;\r\n");
}
if (tbcol.Attribute.IsIdentity == true)
{
seqcols.Add(NaviteTuple.Create(tbcol, tbname, tbcol.Attribute.IsIdentity == true));
}
if (string.IsNullOrEmpty(tbcol.Comment) == false)
{
sbalter.Append("COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)).Append(";\r\n");
}
}
var dsuksql = _commonUtils.FormatSql(@"
select
c.attname,
b.relname,
--case when sys_index_column_has_property(b.oid, c.attnum, 'desc') = 't' then 1 else 0 end IsDesc,
0,
case when indisunique = 't' then 1 else 0 end IsUnique
from sys_index a
inner join sys_class b on b.oid = a.indexrelid
inner join sys_attribute c on c.attnum > 0 and c.attrelid = b.oid
inner join sys_namespace ns on ns.oid = b.relnamespace
inner join sys_class d on d.oid = a.indrelid
where ns.nspname in ({0}) and d.relname in ({1}) and a.indisprimary = 'f'", 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 ukname = ReplaceIndexName(uk.Name, tbname[1]);
var dsukfind1 = dsuk.Where(a => string.Compare(a[1], ukname, true) == 0).ToArray();
if (dsukfind1.Any() == false || dsukfind1.Length != uk.Columns.Length || dsukfind1.Where(a => uk.Columns.Where(b => (a[3] == "1") == uk.IsUnique && 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(ukname)).Append(";\r\n");
}
sbalter.Append("CREATE ");
if (uk.IsUnique)
{
sbalter.Append("UNIQUE ");
}
sbalter.Append("INDEX ").Append(_commonUtils.QuoteSqlName(ukname)).Append(" ON ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append("(");
foreach (var tbcol in uk.Columns)
{
sbalter.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name));
if (tbcol.IsDesc)
{
sbalter.Append(" DESC");
}
sbalter.Append(", ");
}
sbalter.Remove(sbalter.Length - 2, 2).Append(");\r\n");
}
}
}
if (istmpatler == false)
{
var dbcomment = string.Concat(_orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(@" select
d.description
from sys_class a
inner join sys_namespace b on b.oid = a.relnamespace
left join sys_description d on d.objoid = a.oid and objsubid = 0
where b.nspname not in ('DIRECTORIES', 'INFO_SCHEM', 'REPLICATION', 'STAGENT', 'SYSAUDIT', 'SYSDBA', 'SYSFTSDBA', 'SYSSECURE', 'SYS_GLOBAL_TEMP', 'WMSYS') and a.relkind in ('r') and b.nspname = {0} and a.relname = {1}
and b.nspname || '.' || a.relname not in ('PUBLIC.GEOGRAPHY_COLUMNS','PUBLIC.GEOMETRY_COLUMNS','PUBLIC.RASTER_COLUMNS','PUBLIC.RASTER_OVERVIEWS')", tbname[0], tbname[1])));
if (dbcomment != (tb.Comment ?? ""))
{
sb.Append("COMMENT ON TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tb.Comment)).Append(";\r\n");
}
sb.Append(sbalter);
continue;
}
var oldpk = _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(@" select sys_constraint.conname as pk_name from sys_constraint
inner join sys_class on sys_constraint.conrelid = sys_class.oid
inner join sys_namespace on sys_namespace.oid = sys_class.relnamespace
where sys_namespace.nspname={0} and sys_class.relname={1} and sys_constraint.contype='p'
", tbname))?.ToString();
if (string.IsNullOrEmpty(oldpk) == false)
{
sb.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" DROP CONSTRAINT ").Append(oldpk).Append(";\r\n");
}
//创建临时表，数据导进临时表，然后删除原表，将临时表改名为原表名
var tablename = tboldname == null?_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}") : _commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}");
var tmptablename = _commonUtils.QuoteSqlName($"{tbname[0]}.FTmp_{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).Append(",");
if (tbcol.Attribute.IsIdentity == true)
{
seqcols.Add(NaviteTuple.Create(tbcol, tbname, true));
}
}
if (tb.Primarys.Any())
{
var pkname = $"{tbname[0]}_{tbname[1]}_pkey";
sb.Append(" \r\n CONSTRAINT ").Append(_commonUtils.QuoteSqlName(pkname)).Append(" PRIMARY KEY (");
foreach (var tbcol in tb.Primarys)
{
sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append("),");
}
sb.Remove(sb.Length - 1, 1);
sb.Append("\r\n) BINLOG ON;\r\n");
//备注
foreach (var tbcol in tb.ColumnsByPosition)
{
if (string.IsNullOrEmpty(tbcol.Comment) == false)
{
sb.Append("COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.FTmp_{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)).Append(";\r\n");
}
}
if (string.IsNullOrEmpty(tb.Comment) == false)
{
sb.Append("COMMENT ON TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.FTmp_{tbname[1]}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tb.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 = $"coalesce({insertvalue},{tbcol.DbDefaultValue})";
}
}
else if (tbcol.Attribute.IsNullable == false)
{
insertvalue = tbcol.DbDefaultValue;
}
sb.Append(insertvalue).Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append(" FROM ").Append(tablename).Append(";\r\n");
sb.Append("DROP TABLE ").Append(tablename).Append(";\r\n");
sb.Append("ALTER TABLE ").Append(tmptablename).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName(tbname[1])).Append(";\r\n");
//创建表的索引
foreach (var uk in tb.Indexes)
{
sb.Append("CREATE ");
if (uk.IsUnique)
{
sb.Append("UNIQUE ");
}
sb.Append("INDEX ").Append(_commonUtils.QuoteSqlName(ReplaceIndexName(uk.Name, tbname[1]))).Append(" ON ").Append(tablename).Append("(");
foreach (var tbcol in uk.Columns)
{
sb.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name));
if (tbcol.IsDesc)
{
sb.Append(" DESC");
}
sb.Append(", ");
}
sb.Remove(sb.Length - 2, 2).Append(");\r\n");
}
}
foreach (var seqcol in seqcols)
{
var tbname = seqcol.Item2;
var seqname = Utils.GetCsName($"{tbname[0]}.{tbname[1]}_{seqcol.Item1.Attribute.Name}_seq").ToUpper();;
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("'::text);\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());
}
}
}