{"id":173,"date":"2005-09-29T19:09:43","date_gmt":"2005-09-29T11:09:43","guid":{"rendered":"http:\/\/fdream.net\/blog\/article\/173.aspx"},"modified":"2006-03-26T20:03:06","modified_gmt":"2006-03-26T12:03:06","slug":"ASP%e4%b8%adRS.OPEN%e5%90%8e%e5%8f%82%e6%95%b0%e7%9a%84%e6%84%8f%e4%b9%89","status":"publish","type":"post","link":"https:\/\/fdream.net\/blog\/article\/173","title":{"rendered":"ASP\u4e2dRS.OPEN\u540e\u53c2\u6570\u7684\u610f\u4e49"},"content":{"rendered":"

\u8fd9\u662f\u5728\u94fe\u63a5\u6570\u636e\u5e93\u7684\u65f6\u5019\u4f7f\u7528\u7684\u4e1c\u4e1c\uff0c\u5e38\u7528\u7684\u4e5f\u5c31\u51e0\u4e2a\u53c2\u6570\uff0c\u4e5f\u5c11\u6709\u4eba\u53bb\u4ed4\u7ec6\u7814\u7a76\u8fd9\u4e9b\u53c2\u6570\u4e86\uff0c\u5475\u5475\uff5e<\/p>\n

RS.OPEN SQL,CONN,A,B<\/p>\n

A: <\/p>\n

ADOPENFORWARDONLY(=0)
\u53ea\u8bfb,\u4e14\u5f53\u524d\u6570\u636e\u8bb0\u5f55\u53ea\u80fd\u5411\u4e0b\u79fb\u52a8<\/p>\n

ADOPENKEYSET(=1)
\u53ea\u8bfb,\u5f53\u524d\u6570\u636e\u8bb0\u5f55\u53ef\u81ea\u7531\u79fb\u52a8<\/p>\n

ADOPENDYNAMIC(=2)
\u53ef\u8bfb\u5199,\u5f53\u524d\u6570\u636e\u8bb0\u5f55\u53ef\u81ea\u7531\u79fb\u52a8<\/p>\n

ADOPENSTATIC(=3)
\u53ef\u8bfb\u5199,\u5f53\u524d\u6570\u636e\u8bb0\u5f55\u53ef\u81ea\u7531\u79fb\u52a8,\u53ef\u770b\u5230\u65b0\u589e\u8bb0\u5f55<\/p>\n

B:<\/p>\n

ADLOCKREADONLY(=1)
\u7f3a\u7701\u9501\u5b9a\u7c7b\u578b\uff0c\u8bb0\u5f55\u96c6\u662f\u53ea\u8bfb\u7684\uff0c\u4e0d\u80fd\u4fee\u6539\u8bb0\u5f55<\/p>\n

ADLOCKPESSIMISTIC(=2)
\u60b2\u89c2\u9501\u5b9a\uff0c\u5f53\u4fee\u6539\u8bb0\u5f55\u65f6\uff0c\u6570\u636e\u63d0\u4f9b\u8005\u5c06\u5c1d\u8bd5\u9501\u5b9a\u8bb0\u5f55\u4ee5\u786e\u4fdd\u6210\u529f\u5730\u7f16\u8f91\u8bb0\u5f55\u3002\u53ea\u8981\u7f16\u8f91\u4e00\u5f00\u59cb\uff0c\u5219\u7acb\u5373\u9501\u4f4f\u8bb0\u5f55\u3002<\/p>\n

ADLOCKOPTIMISTIC(=3)
\u4e50\u89c2\u9501\u5b9a \uff0c\u76f4\u5230\u7528Update\u65b9\u6cd5\u63d0\u4ea4\u66f4\u65b0\u8bb0\u5f55\u65f6\u624d\u9501\u5b9a\u8bb0\u5f55\u3002<\/p>\n

ADLOCKBATCHOPTIMISTIC(=4)
\u6279\u91cf\u4e50\u89c2\u9501\u5b9a\uff0c\u5141\u8bb8\u4fee\u6539\u591a\u4e2a\u8bb0\u5f55\uff0c\u53ea\u6709\u8c03\u7528UpdateBatch\u65b9\u6cd5\u540e\u624d\u9501\u5b9a\u8bb0\u5f55\u3002<\/p>\n

\u5f53\u4e0d\u9700\u8981\u6539\u52a8\u4efb\u4f55\u8bb0\u5f55\u65f6\uff0c\u5e94\u8be5\u4f7f\u7528\u53ea\u8bfb\u7684\u8bb0\u5f55\u96c6\uff0c\u8fd9\u6837\u63d0\u4f9b\u8005\u4e0d\u7528\u505a\u4efb\u4f55\u68c0\u6d4b\u3002
\u5bf9\u4e8e\u4e00\u822c\u7684\u4f7f\u7528\uff0c\u4e50\u89c2\u7684\u9501\u5b9a\u53ef\u80fd\u662f\u6700\u597d\u7684\u9009\u62e9\uff0c\u56e0\u4e3a\u8bb0\u5f55\u53ea\u88ab\u9501\u5b9a\u4e00\u5c0f\u6bb5\u65f6\u95f4\uff0c
\u6570\u636e\u5728\u8fd9\u6bb5\u65f6\u95f4\u88ab\u66f4\u65b0\u3002\u8fd9\u51cf\u5c11\u4e86\u8d44\u6e90\u7684\u4f7f\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u8fd9\u662f\u5728\u94fe\u63a5\u6570\u636e\u5e93\u7684\u65f6\u5019\u4f7f\u7528\u7684\u4e1c\u4e1c\uff0c\u5e38\u7528\u7684\u4e5f\u5c31\u51e0\u4e2a\u53c2\u6570\uff0c\u4e5f\u5c11\u6709\u4eba\u53bb\u4ed4\u7ec6\u7814\u7a76\u8fd9\u4e9b\u53c2\u6570\u4e86\uff0c\u5475\u5475\uff5e RS.OPEN SQL,CONN,A,B A: ADOPENFORWARDONLY(=0) \u53ea\u8bfb,\u4e14\u5f53\u524d\u6570\u636e\u8bb0\u5f55\u53ea\u80fd\u5411\u4e0b\u79fb\u52a8 ADOPENKEYSET(=1) \u53ea\u8bfb,\u5f53\u524d\u6570\u636e\u8bb0\u5f55\u53ef\u81ea\u7531\u79fb\u52a8 ADOPENDYNAMIC(=2) \u53ef\u8bfb\u5199,\u5f53\u524d\u6570\u636e\u8bb0\u5f55\u53ef\u81ea\u7531\u79fb\u52a8 ADOPENSTATIC(=3) \u53ef\u8bfb\u5199,\u5f53\u524d\u6570\u636e\u8bb0\u5f55\u53ef\u81ea\u7531\u79fb\u52a8,\u53ef\u770b\u5230\u65b0\u589e\u8bb0\u5f55 B: ADLOCKREADONLY(=1) \u7f3a\u7701\u9501\u5b9a\u7c7b\u578b\uff0c\u8bb0\u5f55\u96c6\u662f\u53ea\u8bfb\u7684\uff0c\u4e0d\u80fd\u4fee\u6539\u8bb0\u5f55 ADLOCKPESSIMISTIC(=2) \u60b2\u89c2\u9501\u5b9a\uff0c\u5f53\u4fee\u6539\u8bb0\u5f55\u65f6\uff0c\u6570\u636e\u63d0\u4f9b\u8005\u5c06\u5c1d\u8bd5\u9501\u5b9a\u8bb0\u5f55\u4ee5\u786e\u4fdd\u6210\u529f\u5730\u7f16\u8f91\u8bb0\u5f55\u3002\u53ea\u8981\u7f16\u8f91\u4e00\u5f00\u59cb\uff0c\u5219\u7acb\u5373\u9501\u4f4f\u8bb0\u5f55\u3002 ADLOCKOPTIMISTIC(=3) \u4e50\u89c2\u9501\u5b9a \uff0c\u76f4\u5230\u7528Update\u65b9\u6cd5\u63d0\u4ea4\u66f4\u65b0\u8bb0\u5f55\u65f6\u624d\u9501\u5b9a\u8bb0\u5f55\u3002 ADLOCKBATCHOPTIMISTIC(=4) \u6279\u91cf\u4e50\u89c2\u9501\u5b9a\uff0c\u5141\u8bb8\u4fee\u6539\u591a\u4e2a\u8bb0\u5f55\uff0c\u53ea\u6709\u8c03\u7528UpdateBatch\u65b9\u6cd5\u540e\u624d\u9501\u5b9a\u8bb0\u5f55\u3002 \u5f53\u4e0d\u9700\u8981\u6539\u52a8\u4efb\u4f55\u8bb0\u5f55\u65f6\uff0c\u5e94\u8be5\u4f7f\u7528\u53ea\u8bfb\u7684\u8bb0\u5f55\u96c6\uff0c\u8fd9\u6837\u63d0\u4f9b\u8005\u4e0d\u7528\u505a\u4efb\u4f55\u68c0\u6d4b\u3002\u5bf9\u4e8e\u4e00\u822c\u7684\u4f7f\u7528\uff0c\u4e50\u89c2\u7684\u9501\u5b9a\u53ef\u80fd\u662f\u6700\u597d\u7684\u9009\u62e9\uff0c\u56e0\u4e3a\u8bb0\u5f55\u53ea\u88ab\u9501\u5b9a\u4e00\u5c0f\u6bb5\u65f6\u95f4\uff0c\u6570\u636e\u5728\u8fd9\u6bb5\u65f6\u95f4\u88ab\u66f4\u65b0\u3002\u8fd9\u51cf\u5c11\u4e86\u8d44\u6e90\u7684\u4f7f\u7528\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[25,123],"class_list":["post-173","post","type-post","status-publish","format-standard","hentry","category-coding","tag-ASP","tag-123"],"views":22120,"_links":{"self":[{"href":"https:\/\/fdream.net\/blog\/wp-json\/wp\/v2\/posts\/173","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fdream.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fdream.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fdream.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fdream.net\/blog\/wp-json\/wp\/v2\/comments?post=173"}],"version-history":[{"count":0,"href":"https:\/\/fdream.net\/blog\/wp-json\/wp\/v2\/posts\/173\/revisions"}],"wp:attachment":[{"href":"https:\/\/fdream.net\/blog\/wp-json\/wp\/v2\/media?parent=173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fdream.net\/blog\/wp-json\/wp\/v2\/categories?post=173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fdream.net\/blog\/wp-json\/wp\/v2\/tags?post=173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}