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- 增加 IDbFirst.GetTableByName 方法获取单表信息，包括列详情、主键、唯一键、索引、备注；

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This commit is contained in:
28810
2020-08-11 23:23:54 +08:00
parent da6effcf52
commit 0d832a5a23
33 changed files with 994 additions and 601 deletions
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112
Providers/FreeSql.Provider.Odbc/MySql/OdbcMySqlDbFirst.cs
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@ -132,14 +132,30 @@ namespace FreeSql.Odbc.MySql
return string.Concat(_orm.Ado.ExecuteScalar(CommandType.Text, sql)) == "1";
}
public List<DbTableInfo> GetTablesByDatabase(params string[] database2)
public DbTableInfo GetTableByName(string name, bool ignoreCase = true) => GetTables(null, name, ignoreCase)?.FirstOrDefault();
public List<DbTableInfo> GetTablesByDatabase(params string[] database) => GetTables(database, null, false);
public List<DbTableInfo> GetTables(string[] database, string tablename, bool ignoreCase)
{
var loc1 = new List<DbTableInfo>();
var loc2 = new Dictionary<string, DbTableInfo>();
var loc3 = new Dictionary<string, Dictionary<string, DbColumnInfo>>();
var database = database2?.ToArray();
if (database == null || database.Any() == false)
string[] tbname = null;
if (string.IsNullOrEmpty(tablename) == false)
{
tbname = _commonUtils.SplitTableName(tablename);
if (tbname?.Length == 1)
{
using (var conn = _orm.Ado.MasterPool.Get(TimeSpan.FromSeconds(5)))
{
if (string.IsNullOrEmpty(conn.Value.Database)) return loc1;
tbname = new[] { conn.Value.Database, tbname[0] };
}
}
if (ignoreCase) tbname = tbname.Select(a => a.ToLower()).ToArray();
database = new[] { tbname[0] };
}
else if (database == null || database.Any() == false)
{
using (var conn = _orm.Ado.MasterPool.Get())
{
@ -147,8 +163,9 @@ namespace FreeSql.Odbc.MySql
database = new[] { conn.Value.Database };
}
}
var databaseIn = string.Join(",", database.Select(a => _commonUtils.FormatSql("{0}", a)));
var sql = string.Format(@"
var sql = $@"
select
concat(a.table_schema, '.', a.table_name) 'id',
a.table_schema 'schema',
@ -156,7 +173,7 @@ a.table_name 'table',
a.table_comment,
a.table_type 'type'
from information_schema.tables a
where a.table_schema in ({0})", databaseIn);
where {(ignoreCase ? "lower(a.table_schema)" : "a.table_schema")} in ({databaseIn}){(tbname == null ? "" : $" and {(ignoreCase ? "lower(a.table_name)" : "a.table_name")}={_commonUtils.FormatSql("{0}", tbname[1])}")}";
var ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
if (ds == null) return loc1;
@ -217,7 +234,7 @@ where a.table_schema in ({0})", databaseIn);
}
loc8.Append(")");
sql = string.Format(@"
sql = $@"
select
concat(a.table_schema, '.', a.table_name),
a.column_name,
@ -229,8 +246,8 @@ case when locate('auto_increment', a.extra) > 0 then 1 else 0 end 'is_identity',
a.column_comment 'comment',
a.column_default 'default_value'
from information_schema.columns a
where a.table_schema in ({1}) and {0}
", loc8, databaseIn);
where {(ignoreCase ? "lower(a.table_schema)" : "a.table_schema")} in ({databaseIn}) and {loc8}
";
ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
if (ds == null) return loc1;
@ -271,7 +288,7 @@ where a.table_schema in ({1}) and {0}
loc3[table_id][column].CsType = this.GetCsTypeInfo(loc3[table_id][column]);
}
sql = string.Format(@"
sql = $@"
select
concat(a.table_schema, '.', a.table_name) 'table_id',
a.column_name,
@ -281,8 +298,8 @@ case when a.index_name = 'PRIMARY' then 1 else 0 end 'IsPrimaryKey',
0 'IsClustered',
0 'IsDesc'
from information_schema.statistics a
where a.table_schema in ({1}) and {0}
", loc8, databaseIn);
where {(ignoreCase ? "lower(a.table_schema)" : "a.table_schema")} in ({databaseIn}) and {loc8}
";
ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
if (ds == null) return loc1;
@ -333,7 +350,9 @@ where a.table_schema in ({1}) and {0}
}
}
sql = string.Format(@"
if (tbname == null)
{
sql = $@"
select
concat(a.constraint_schema, '.', a.table_name) 'table_id',
a.column_name,
@ -342,43 +361,44 @@ concat(a.referenced_table_schema, '.', a.referenced_table_name) 'ref_table_id',
1 'IsForeignKey',
a.referenced_column_name 'ref_column'
from information_schema.key_column_usage a
where a.constraint_schema in ({1}) and {0} and not isnull(position_in_unique_constraint)
", loc8, databaseIn);
ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
if (ds == null) return loc1;
where {(ignoreCase ? "lower(a.constraint_schema)" : "a.constraint_schema")} in ({databaseIn}) and {loc8} and not isnull(position_in_unique_constraint)
";
ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
if (ds == null) return loc1;
var fkColumns = new Dictionary<string, Dictionary<string, DbForeignInfo>>();
foreach (var row in ds)
{
string table_id = string.Concat(row[0]);
string column = string.Concat(row[1]);
string fk_id = string.Concat(row[2]);
string ref_table_id = string.Concat(row[3]);
bool is_foreign_key = string.Concat(row[4]) == "1";
string referenced_column = string.Concat(row[5]);
if (database.Length == 1)
var fkColumns = new Dictionary<string, Dictionary<string, DbForeignInfo>>();
foreach (var row in ds)
{
table_id = table_id.Substring(table_id.IndexOf('.') + 1);
ref_table_id = ref_table_id.Substring(ref_table_id.IndexOf('.') + 1);
}
if (loc3.ContainsKey(table_id) == false || loc3[table_id].ContainsKey(column) == false) continue;
var loc9 = loc3[table_id][column];
if (loc2.ContainsKey(ref_table_id) == false) continue;
var loc10 = loc2[ref_table_id];
var loc11 = loc3[ref_table_id][referenced_column];
string table_id = string.Concat(row[0]);
string column = string.Concat(row[1]);
string fk_id = string.Concat(row[2]);
string ref_table_id = string.Concat(row[3]);
bool is_foreign_key = string.Concat(row[4]) == "1";
string referenced_column = string.Concat(row[5]);
if (database.Length == 1)
{
table_id = table_id.Substring(table_id.IndexOf('.') + 1);
ref_table_id = ref_table_id.Substring(ref_table_id.IndexOf('.') + 1);
}
if (loc3.ContainsKey(table_id) == false || loc3[table_id].ContainsKey(column) == false) continue;
var loc9 = loc3[table_id][column];
if (loc2.ContainsKey(ref_table_id) == false) continue;
var loc10 = loc2[ref_table_id];
var loc11 = loc3[ref_table_id][referenced_column];
Dictionary<string, DbForeignInfo> loc12 = null;
DbForeignInfo loc13 = null;
if (!fkColumns.TryGetValue(table_id, out loc12))
fkColumns.Add(table_id, loc12 = new Dictionary<string, DbForeignInfo>());
if (!loc12.TryGetValue(fk_id, out loc13))
loc12.Add(fk_id, loc13 = new DbForeignInfo { Table = loc2[table_id], ReferencedTable = loc10 });
loc13.Columns.Add(loc9);
loc13.ReferencedColumns.Add(loc11);
Dictionary<string, DbForeignInfo> loc12 = null;
DbForeignInfo loc13 = null;
if (!fkColumns.TryGetValue(table_id, out loc12))
fkColumns.Add(table_id, loc12 = new Dictionary<string, DbForeignInfo>());
if (!loc12.TryGetValue(fk_id, out loc13))
loc12.Add(fk_id, loc13 = new DbForeignInfo { Table = loc2[table_id], ReferencedTable = loc10 });
loc13.Columns.Add(loc9);
loc13.ReferencedColumns.Add(loc11);
}
foreach (var table_id in fkColumns.Keys)
foreach (var fk in fkColumns[table_id])
loc2[table_id].ForeignsDict.Add(fk.Key, fk.Value);
}
foreach (var table_id in fkColumns.Keys)
foreach (var fk in fkColumns[table_id])
loc2[table_id].ForeignsDict.Add(fk.Key, fk.Value);
foreach (var table_id in loc3.Keys)
{