public static TableMapper GetTableSchema(String TableName, EDataBase DataBaseType)
{
try
{
var Retorno = new TableMapper();
var Query = String.Empty;
switch (DataBaseType)
{
case EDataBase.MySql:
Retorno = LoadMySql(TableName);
break;
case EDataBase.SqlServer:
Retorno = LoadSQLServer(TableName);
break;
case EDataBase.Oracle:
Retorno = LoadOracle(TableName);
break;
}
return (Retorno);
}
catch (Exception Ex)
{
throw Ex;
}
}
private static TableMapper LoadOracle(String TableName)
{
var TableMap = new TableMapper();
var Query = String.Format(@"SELECT a.column_name column_name,
CASE a.nullable
WHEN 'Y' then 'yes'
WHEN 'N' then 'no'
ELSE ''
END is_nullable,
LOWER(a.data_type) data_type,
a.data_length maximum_length,
CASE b.constraint_type
WHEN 'P' THEN 'pk'
ELSE ''
END column_key
FROM all_tab_columns a,
(SELECT w.column_name,
g.constraint_type,
w.table_name
FROM all_cons_columns w, all_constraints g
WHERE w.constraint_name = g.constraint_name(+)
AND g.constraint_type = 'P' ORDER BY 1) b
WHERE a.table_name = b.table_name(+)
AND a.column_name = b.column_name(+)
AND a.table_name = '{0}'", TableName);
using (var Conexao = new ConnectionOracle(Query, string.Empty))
{
if (Conexao.Open())
{
var Collection = new List<ColumnMapper>();
TableMap.TableName = TableName;
while (Conexao.LerRegistro())
{
var Column = new ColumnMapper();
Column.ColumnName = Conexao.Ler("COLUMN_NAME").ToString();
Column.IsNullable = Conexao.Ler("IS_NULLABLE").ToString();
Column.DataType = Conexao.Ler("DATA_TYPE").ToString();
Column.MaxLenght = Conexao.Ler("MAXIMUM_LENGTH").ToString();
Column.ColumnKey = Conexao.Ler("COLUMN_KEY").ToString();
Collection.Add(Column);
}
TableMap.CollectionColumn = Collection;
}
}
return (TableMap);
}
private static TableMapper LoadMySql(String TableName)
{
var TableMapper = new TableMapper();
var Query = string.Format(@"SELECT UPPER(COLUMN_NAME) COLUMN_NAME,
LOWER(IS_NULLABLE) IS_NULLABLE,
LOWER(DATA_TYPE) DATA_TYPE,
LOWER(CHARACTER_MAXIMUM_LENGTH) MAXIMUM_LENGTH,
CASE WHEN LOWER(COLUMN_KEY) = 'pri' THEN 'pk'
WHEN LOWER(COLUMN_KEY) = 'mul' THEN 'fk'
WHEN LOWER(COLUMN_KEY) = NULL THEN NULL
END AS COLUMN_KEY
FROM INFORMATION_SCHEMA.COLUMNS A
WHERE A.TABLE_NAME = '{0}'
ORDER BY A.ORDINAL_POSITION ASC", TableName);
using (var Conexao = new ConnectionMySql(Query))
{
if (Conexao.Open())
{
TableMapper.TableName = TableName;
var CollectionColumnMapper = new List<ColumnMapper>();
while (Conexao.LerRegistro())
{
var Column = new ColumnMapper();
Column.ColumnName = Conexao.Ler("COLUMN_NAME").ToString();
Column.IsNullable = Conexao.Ler("IS_NULLABLE").ToString();
Column.DataType = Conexao.Ler("DATA_TYPE").ToString();
Column.MaxLenght = Conexao.Ler("MAXIMUM_LENGTH").ToString();
Column.ColumnKey = Conexao.Ler("COLUMN_KEY").ToString();
CollectionColumnMapper.Add(Column);
}
TableMapper.CollectionColumn = CollectionColumnMapper;
}
}
return (TableMapper);
}
private static TableMapper LoadSQLServer(String TableName)
{
var TableMapper = new TableMapper();
var Query = "SELECT " +
"UPPER(A.COLUMN_NAME) COLUMN_NAME, " +
"LOWER(A.IS_NULLABLE) IS_NULLABLE, " +
"LOWER(A.DATA_TYPE) DATA_TYPE, " +
"LOWER(A.CHARACTER_MAXIMUM_LENGTH) MAXIMUM_LENGTH, " +
"B.COLUMN_KEY " +
"FROM " +
"INFORMATION_SCHEMA.COLUMNS A LEFT JOIN " +
"(SELECT UPPER(KCU.TABLE_NAME) AS TABLE_NAME, " +
" UPPER(KCU.COLUMN_NAME) AS COLUMN_NAME, " +
" CASE WHEN LOWER(TC.CONSTRAINT_TYPE) = 'PRIMARY KEY' THEN 'pk' " +
" WHEN LOWER(TC.CONSTRAINT_TYPE) = 'FOREIGN KEY' THEN 'fk' " +
" WHEN LOWER(TC.CONSTRAINT_TYPE) = 'UNIQUE' THEN NULL " +
" WHEN LOWER(TC.CONSTRAINT_TYPE) = NULL THEN NULL " +
" END AS COLUMN_KEY " +
" FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE KCU " +
" LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS TC " +
" ON KCU.TABLE_NAME = TC.TABLE_NAME " +
" AND KCU.TABLE_SCHEMA = TC.TABLE_SCHEMA " +
" AND KCU.TABLE_CATALOG = TC.TABLE_CATALOG " +
" AND KCU.CONSTRAINT_CATALOG = TC.CONSTRAINT_CATALOG " +
" AND KCU.CONSTRAINT_NAME = TC.CONSTRAINT_NAME " +
" LEFT JOIN INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS RC " +
" ON RC.CONSTRAINT_SCHEMA = TC.CONSTRAINT_SCHEMA " +
" AND RC.CONSTRAINT_CATALOG = TC.CONSTRAINT_CATALOG " +
" AND RC.CONSTRAINT_NAME = TC.CONSTRAINT_NAME " +
" LEFT JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE CCU " +
" ON RC.UNIQUE_CONSTRAINT_SCHEMA = CCU.CONSTRAINT_SCHEMA " +
" AND RC.UNIQUE_CONSTRAINT_CATALOG = CCU.CONSTRAINT_CATALOG " +
" AND RC.UNIQUE_CONSTRAINT_NAME = CCU.CONSTRAINT_NAME) B " +
" ON A.TABLE_NAME = B.TABLE_NAME AND A.COLUMN_NAME = B.COLUMN_NAME " +
"WHERE " +
"A.TABLE_NAME = '" + TableName + "'";
using (var Conexao = new ConnectionSqlServer(Query))
{
if (Conexao.Open())
{
TableMapper.TableName = TableName;
var CollectionColumnMapper = new List<ColumnMapper>();
while (Conexao.LerRegistro())
{
var Column = new ColumnMapper();
Column.ColumnName = Conexao.Ler("COLUMN_NAME").ToString();
Column.IsNullable = Conexao.Ler("IS_NULLABLE").ToString();
Column.DataType = Conexao.Ler("DATA_TYPE").ToString();
Column.MaxLenght = Conexao.Ler("MAXIMUM_LENGTH").ToString();
Column.ColumnKey = Conexao.Ler("COLUMN_KEY").ToString();
CollectionColumnMapper.Add(Column);
}
TableMapper.CollectionColumn = CollectionColumnMapper;
}
}
return (TableMapper);
}
