Question

在icc-schema.xml jdbcDatatable column中，有一个tableType和一个type属性。

示例：

列名=＆＃34; first_opened_date＆＃34; TABLETYPE =＆＃34; TIMESTAMP＆＃34;类型=＆＃34; DATETIME＆＃34;选定=＆＃34;真＆＃34;的PrimaryKey =＆＃34;假＆＃34;

列名=＆＃34; prepared_food＆＃34; TABLETYPE =＆＃34; BIT＆＃34;类型=＆＃34; BOOLEAN＆＃34;选定=＆＃34;真＆＃34;的PrimaryKey =＆＃34;假＆＃34;

我猜测tableType是指数据库中定义的数据类型，type是与java.sql.Types大致相关的icCube内部标识符。

如果这是正确的，可以从java.sql.Metadata.getColumns.getString("TYPE_NAME")读取前[tableType]，并且必须从java.sql.Metadata.getColumns.getString("DATA_TYPE")推断出后者[type]。

我的猜测是否正确？你有对应表吗？错误或缺失属性的影响是什么？

Answer 1

假设我们正在谈论JDBC表。

＆＃34;的 TABLETYPE ＆＃34;在代码中没有这样使用;它显示为一个指示。该名称源自元信息返回的 java.sql.Types 整数。

＆＃34;的类型＆＃34;是列的实际数据类型。从DB读取的值将被转换到此数据类型，然后用于构建维度和事实。这是显示的类型在表UI中作为＆＃34;输出类型＆＃34;。可能的值有：

DATE DATETIME BOOLEAN DOUBLE FLOAT SHORT INTEGER LONG STRING UPPERCASE_STRING JAVA_OBJECT DB_TYPE_UNSUPPORTED

java.sql.Types的映射如下：

DATE from: Types.DATE DATETIME from: Types.TIMESTAMP BOOLEAN from: Types.BIT, Types.BOOLEAN DOUBLE from: Types.FLOAT, Types.DOUBLE, Types.NUMERIC, Types.DECIMAL FLOAT from: Types.REAL SHORT from: Types.TINYINT, Types.SMALLINT INTEGER from: Types.INTEGER LONG from: Types.BIGINT, Types.ROWID STRING from: Types.VARCHAR, Types.LONGVARCHAR, Types.NVARCHAR, Types.LONGNVARCHAR, Types.CHAR, Types.NCHAR UPPERCASE_STRING from: n/a JAVA_OBJECT from: Types.JAVA_OBJECT DB_TYPE_UNSUPPORTED from: n/a

希望有所帮助。

Answer 2

补充@Polizzi的答案，以防万一你反过来需要它：

    tableType = JDBCType.valueOf(dbtype).getName();
    switch(dbtype){
        case Types.DATE:
            type = "DATE";
            break;
        case Types.TIMESTAMP:
            type = "DATETIME";
            break;            
        case Types.BIT:
            type = "BOOLEAN";
            break;             
        case Types.BOOLEAN:
            type = "BOOLEAN";
            break;             
        case Types.FLOAT:
            type = "DOUBLE";
            break;          
        case Types.DOUBLE:
            type = "DOUBLE";
            break;          
        case Types.NUMERIC:
            type = "DOUBLE";
            break;              
        case Types.DECIMAL:
            type = "DOUBLE";
            break;          
        case Types.REAL:
            type = "FLOAT";
            break;           
        case Types.TINYINT:
            type = "SHORT";
            break;           
        case Types.SMALLINT:
            type = "SHORT";
            break;           
        case Types.INTEGER:
            type = "INTEGER";
            break;         
        case Types.BIGINT:
            type = "LONG";
            break;           
        case Types.ROWID:
            type = "LONG";
            break;            
        case Types.VARCHAR:
            type = "STRING";
            tableType = "VARCHAR("+length+")";
            break;          
        case Types.LONGVARCHAR:
            type = "STRING";
            tableType = "LONGVARCHAR("+length+")";
            break;         
        case Types.NVARCHAR:
            type = "STRING";
            tableType = "NVARCHAR("+length+")";
            break;              
        case Types.LONGNVARCHAR:
            type = "STRING";
            tableType = "LONGVARCHAR("+length+")";
            break;          
        case Types.CHAR:
            type = "STRING";
            tableType = "CHAR("+length+")";
            break;              
        case Types.NCHAR:
            type = "STRING";
            tableType = "NCHAR("+length+")";
            break;               
        case Types.JAVA_OBJECT:
            type = "JAVA_OBJECT";
            break; 
        default:
            type = "DB_TYPE_UNSUPPORTED";
    }

icCube定义的icc-schema.xml

2 个答案: