AI代码解释 List<String>tableOptionsStrings=createTable.getTableOptionsStrings();String tableCommentSql=null;int commentIndex=tableOptionsStrings.indexOf("COMMENT");if(commentIndex!=-1){tableCommentSql=String.format("COMMENT ON TABLE %s IS %s;",tableFullyQualifiedName,tableOptionsStrings.get(commentIndex...
this must be <= MEM_MAX_ALLOC_IN_BUF @return allocated, zero-filled storage */ UNIV_INLINE void *mem_heap_zalloc(mem_heap_t *heap, ulint n); /** Allocates n bytes of memory from a memory heap. @
查询表记录的时候,发现字段的数据值缺失。示例:写入一条有特殊字符 𝑥 的记录,记录里面字段值在 𝑥 之后的字符都丢失了。 下面是,开启了严格模式: 问题原因定位到后,解决方案是,在不对数据库做任何配置调整的前提下,业务逻辑中增加对特殊字符的检测,过滤掉数据库不支持的特殊字符,从而杜绝写入数据表后出现数据...
columnIdentifier ::= sqlIdentifie pathLeg ::= member | arrayLocation | doubleAsterisk member ::= period ( keyName | asterisk ) arrayLocation ::= leftBracket ( non-negative-integer | asterisk ) rightBracket keyName ::= ECMAScript-identifier | double-quoted-string-literal doubleAsterisk ::= \...
直接提供字符串即可。还可以用JSON_Array和JSON_Object函数来构造 insert into t values(1,'{"num":1,"name":"abc"}') 注意事项: 1、JSON列存储的必须是JSON格式数据,否则会报错 2、JSON数据类型是没有默认值的 3、字段保持统一,存的时候就定好字段名和类型,做好注释并用文档记录 ...
/ array 26,455 Wait array used in primitives sync0rw.c ... / read-write 22,846 read-write lock for thread sync trx:事务的实现 File Name What Name Stands For Size Comment Inside File --- --- --- --- trx0trx.c Transaction / 50,480 The transaction trx0purge.c Transaction / ...
Can be true/false or an array of type names to keep as strings. (Default: false) debug: Prints protocol details to stdout. Can be true/false or an array of packet type names that should be printed. (Default: false) trace: Generates stack traces on Error to include call site of ...
These are the public types of the Column class: Table 2.7 Column class types and descriptionse. TypeDescription ArrayType Specifies the column's internal storage format StorageType Determines whether the column is stored in memory or on disk Type The column's data type. NDB columns have the ...
For the table dump utility, schema specifies the schema that contains the items to be dumped, and tables is an array of strings specifying the tables or views to be dumped. The table dump includes the information required to set up the specified schema in the target MySQL instance, although...
‘TIME’, ‘String’, ‘Integer’, ‘SmallInteger’, ‘BigInteger’, ‘Numeric’, ‘Float’, ‘DateTime’, ‘Date’, ‘Time’, ‘LargeBinary’, ‘Binary’, ‘Boolean’, ‘Unicode’, ‘Concatenable’, ‘UnicodeText’, ‘PickleType’, ‘Interval’, ‘Enum’, ‘Indexable’, ‘ARRAY’, ‘...