更新时间:2024-06-29 GMT+08:00
REF CURSOR
REF Cursor是一种数据类型,它可保存数据库游标值,并可用于返回查询结果。 DSC支持REF CURSOR的迁移。如下示例显示了DSC如何迁移lref_strong_emptyp(本地REF CURSOR)和ref_strong_emptyp(包级别REF CURSOR)。
输入:PL/SQL程序包中使用REF CURSOR(包规范和包体)
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# Package specification CREATE OR REPLACE PACKAGE pkg_refcur IS TYPE ref_variable IS REF CURSOR; TYPE ref_strong_emptyp IS REF CURSOR RETURN emp_o%ROWTYPE; PROCEDURE p_get_employees ( v_id in INTEGER ,po_results OUT ref_strong_emptyp ); END pkg_refcur ; / # Package body CREATE OR REPLACE PACKAGE BODY pkg_refcur IS TYPE lref_strong_emptyp IS REF CURSOR RETURN emp_o%ROWTYPE ; var_num NUMBER ; PROCEDURE p_get_employees ( v_id IN INTEGER, po_results OUT ref_strong_emptyp ) is vemp_rc lref_strong_emptyp ; Begin OPEN po_results for SELECT * FROM emp_o e WHERE e.id = v_id; EXCEPTION WHEN OTHERS THEN RAISE; END p_get_employees; END pkg_refcur; / |
输出
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BEGIN INSERT INTO MIG_ORA_EXT.MIG_PKG_VARIABLES ( SCHEMA_NAME ,PACKAGE_NAME ,SPEC_OR_BODY ,VARIABLE_NAME ,VARIABLE_TYPE ,CONSTANT_I ,DEFAULT_VALUE ,EXPRESSION_I ) VALUES ( UPPER( current_schema ( ) ) ,UPPER( 'pkg_refcur' ) ,'B' ,UPPER( 'var_num' ) ,UPPER( 'NUMBER' ) ,false ,NULL ,false ) ; END ; / CREATE OR REPLACE PROCEDURE pkg_refcur#p_get_employees ( v_id IN INTEGER ,po_results OUT SYS_REFCURSOR ) is vemp_rc SYS_REFCURSOR ; Begin OPEN po_results for SELECT * FROM emp_o e WHERE e.id = v_id ; EXCEPTION WHEN OTHERS THEN RAISE ; END ; / |
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