oracle和postgresql中对待NULLs和空字符(empty string)的方式是不同的。 oracle中的NULLs和空字符串(empty string) 在oracle中,NULLs和空字符串存储在数据库中是等价的。 CREATE TABLE test ( id NUMERIC (
这里可以看出,插入数据库后,空字符串被当做NULL处理了。也就是说空字符串(empty string)在数据库中是不能存储的。 而只有单个空格的字符串是不会被转成NULL的。因为它并不是空字符串(empty string) postgresql中的NULLs和空字符串(empty string) 使用相同的表结构 postgres@=#SELECT id,content,postgres-# CASE...
*/ @Override public boolean preHandle(@NonNull HttpServletRequest request, @NonNull HttpServletResponse response, @NonNull Object handler) throws Exception { String lang = getLangFromCookies(request); if (StringUtils.isEmpty(lang)) { lang = getLangFromHeader(request); } if (StringUtils.isEmpty(la...
publicstaticString decrypt(String content){ if(StringUtils.isEmpty(content)){ returncontent; } String result = content; byte[] contentBytes =null; try{ if(content.length()%4==0){ contentBytes =Base64.decodeBase64(content); }else{ thrownewRuntimeException("字符串"+content+"不是base64编码过...
从下面这里开始有问题了,函数名normalize被解析成关键字了,base_yylex返回的是NORMALIZE,如果是普通函数名应该返回IDENT。 lex返回522后,yacc语法树没有匹配项了,返回错误。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 [lex] NORMALIZE = 522 [yacc] if (!yyerrstatus) { ++yynerrs; yyerror (&yylloc...
kw_string+1639> "like", keyword = 0xd69f47 <ScanKeywords_kw_string+1639> "like"} 2: yyextra->lookahead_token = 488 1: yyextra->have_lookahead = true */ /* Replace cur_token if needed, based on lookahead */ switch (cur_token) { case NOT: /* Replace NOT by NOT_LA if it'...
if (StringUtils.isNotEmpty(managerId)){ String[] managerIds = managerId.split(",");queryParam.put("managerIds", managerIds);} ibatis和mybatis差不多，要改下标签：<isNotEmpty prepend="and" property="managerIds"> <iterate property="managerIds" conjunction="OR"> position(#managerIds[]# in...
if test -f "$pgdata/PG_VERSION"; then error $"Data directory $pgdata is not empty!" return 1 fi return 0 } # code shared between initdb and upgrade actions perform_initdb() { if [ ! -e "$pgdata" ]; then
; Empty if transaction pooling is in use. ; server_reset_query = ; Whether server_reset_query should run in all pooling modes. ; If it is off, server_reset_query is used only for session-pooling. ;server_reset_query_always = 0 ...
*/ node->as_syncdone = bms_is_empty(node->as_valid_subplans); node->as_nasyncremain = bms_num_members(node->as_valid_asyncplans); // 如果没有任何异步子计划需要被执行,那么直接返回 /* Nothing to do if there are no valid async subplans. */ if (node->as_nasyncremain == 0) ...