在oracle中獲取元數據功能

Question

在oracle中，我可以獲得存儲過程的元數據：

 DatabaseMetaData dbMetaData = conn.getMetaData();
 ResultSet rs = dbMetaData.getProcedureColumns(conn.getCatalog(),
                          null,
                          "procedureNamePattern",
                          "columnNamePattern");

  while(rs.next()) {
      // get stored procedure metadata
      String procedureCatalog     = rs.getString(1);
      String procedureSchema      = rs.getString(2);
      String procedureName        = rs.getString(3);
      String columnName           = rs.getString(4);
      short  columnReturn         = rs.getShort(5);
      int    columnDataType       = rs.getInt(6);
      String columnReturnTypeName = rs.getString(7);
  }

但沒有數據返回功能：

DatabaseMetaData.getFunctionColumns()

如何獲取oracle函數的元數據

Answer 1

出了點問題，Elliott Frisch

它總是為不同的商店/功能返回相同的結果：

Catalog Name =，Schema Name =，Table Name =，Column Name = PROCEDURE_CAT，Column Label = PROCEDURE_CAT，Column Data Type = 12，Column Class Name = java.lang.String，Column Return Type Name = VARCHAR2

Catalog Name =，Schema Name =，Table Name =，Column Name = PROCEDURE_SCHEM，Column Label = PROCEDURE_SCHEM，Column Data Type = 12，Column Class Name = java.lang.String，Column Return Type Name = VARCHAR2

Catalog Name =，Schema Name =，Table Name =，Column Name = PROCEDURE_NAME，Column Label = PROCEDURE_NAME，Column Data Type = 12，Column Class Name = java.lang.String，Column Return Type Name = VARCHAR2

Catalog Name =，Schema Name =，Table Name =，Column Name = COLUMN_NAME，Column Label = COLUMN_NAME，Column Data Type = 12，Column Class Name = java.lang.String，Column Return Type Name = VARCHAR2

Catalog Name =，Schema Name =，Table Name =，Column Name = COLUMN_TYPE，Column Label = COLUMN_TYPE，Column Data Type = 2，Column Class Name = java.math.BigDecimal，Column Return Type Name = NUM​​BER

目錄名稱=，架構名稱=，表格名稱=，列名稱= DATA_TYPE，列標簽= DATA_TYPE，列數據類型= 2，列類名稱= java.math.BigDecimal，列返回類型名稱= NUM​​BER

Catalog Name =，Schema Name =，Table Name =，Column Name = TYPE_NAME，Column Label = TYPE_NAME，Column Data Type = 12，Column Class Name = java.lang.String，Column Return Type Name = VARCHAR2

Catalog Name =，Schema Name =，Table Name =，Column Name = PRECISION，Column Label = PRECISION，Column Data Type = 2，Column Class Name = java.math.BigDecimal，Column Return Type Name = NUM​​BER

Catalog Name =，Schema Name =，Table Name =，Column Name = LENGTH，Column Label = LENGTH，Column Data Type = 2，Column Class Name = java.math.BigDecimal，Column Return Type Name = NUM​​BER

Catalog Name =，Schema Name =，Table Name =，Column Name = SCALE，Column Label = SCALE，Column Data Type = 2，Column Class Name = java.math.BigDecimal，Column Return Type Name = NUM​​BER

Catalog Name =，Schema Name =，Table Name =，Column Name = RADIX，Column Label = RADIX，Column Data Type = 2，Column Class Name = java.math.BigDecimal，Column Return Type Name = NUM​​BER

Catalog Name =，Schema Name =，Table Name =，Column Name = NULLABLE，Column Label = NULLABLE，Column Data Type = 2，Column Class Name = java.math.BigDecimal，Column Return Type Name = NUM​​BER

Catalog Name =，Schema Name =，Table Name =，Column Name = REMARKS，Column Label = REMARKS，Column Data Type = 12，Column Class Name = java.lang.String，Column Return Type Name = VARCHAR2

Catalog Name =，Schema Name =，Table Name =，Column Name = SEQUENCE，Column Label = SEQUENCE，Column Data Type = 2，Column Class Name = java.math.BigDecimal，Column Return Type Name = NUM​​BER

Catalog Name =，Schema Name =，Table Name =，Column Name = OVERLOAD，Column Label = OVERLOAD，Column Data Type = 12，Column Class Name = java.lang.String，Column返回類型Name = VARCHAR2

Catalog Name =，Schema Name =，Table Name =，Column Name = DEFAULT_VALUE，Column Label = DEFAULT_VALUE，Column Data Type = -1，Column Class Name = java.lang.String，Column Return Type Name = LONG

Answer 2

這不好，但我為我工作：

select ARGUMENT_NAME, DATA_TYPE, IN_OUT from SYS.ALL_ARGUMENTS where object_name = upper(?) order by position as

然后在java中，我可以得到

String columnName = rs.getString("ARGUMENT_NAME");
if (index == 0) {
    columnName = RETURN_VALUE;
}
String columnDataTypeInString = rs.getString("DATA_TYPE");
String columnReturnInString = rs.getString("IN_OUT");