SqlNode 是 Parse、Validate 阶段的结果,对应 SQL 转换为语法树后的每个节点,例如 SqlSelect SqlJoin. RelNode 是 SqlToRelConverter、Optimize 阶段的结果,对应语法树转换为关系运算符的节点,例如 LogicalProject LogicalJoin,这些节点操作的都是集合,是关系代数运算符的一种,即
这里只是模拟,生产应该是读取配置配置文件,构造DataSourceConfig dbDaoConfig := zorm.DataSourceConfig{ // DSN 数据库的连接字符串,parseTime=true会自动转换为time格式,默认查询出来的是[]byte数组.&loc=Local用于设置时区 DSN: "root:root@tcp(127.0.0.1:3306)/zorm?charset=utf8&parseTime=true&loc=Local"...
// Open new Connection.// See https://github.com/go-sql-driver/mysql#dsn-data-source-name for how// the DSN string is formattedfunc(d MySQLDriver)Open(dsn string)(driver.Conn,error){cfg,err:=ParseDSN(dsn)iferr!=nil{returnnil,err}c:=&connector{cfg:cfg,}returnc.Connect(context...
sqlcmd --sqlconfig string configuration file (default "/Users/<currentUser>/.sqlcmd/sqlconfig") --verbosity int log level, error=0, warn=1, info=2, debug=3, trace=4 (default 2) --version print version of sqlcmd Use "sqlcmd [command] --help" for more information about a command....
String sqlStr = "select 1 from dual where a=b"; PlainSelect select = (PlainSelect) CCJSqlParserUtil.parse(sqlStr); SelectItem selectItem = select.getSelectItems().get(0); Assertions.assertEquals( new LongValue(1) , selectItem.getExpression()); Table table = (Table) select.getFromItem...
sqlcmd --sqlconfig string configuration file (default "/Users/<currentUser>/.sqlcmd/sqlconfig") --verbosity int log level, error=0, warn=1, info=2, debug=3, trace=4 (default 2) --version print version of sqlcmd Use "sqlcmd [command] --help" for more information about a command....
Parse Read GetReparentedValue ToString Write Numeric String & binary Vectors Spatial geography & instances (geography Data Type) Spatial geometry & instances (geometry Data Type) Data types Vectors XML DBCC Functions Language elements Queries
Such a restriction ensures that the parse time for the query stays within acceptable limits. However, a slight risk exists that the optimizer will overlook a good plan it would otherwise have found. OPTIMIZER_MODE Parameter type String Syntax OPTIMIZER_MODE = {first_rows_[1 | 10 | ...
The decoder of the seq2seq model first parses out the SQL skeleton and then the actual SQL query, such that the SQL generation can be implicitly constrained by the previously parsed skeleton. By doing this, to a certain extent, the schema linking and the skeleton parsing are not intertwined...
Visit the project page athttps://github.com/andialbrecht/sqlparsefor further information about this project. Quick Start $ pip install sqlparse >>>importsqlparse>>># Split a string containing two SQL statements:>>>raw='select * from foo; select * from bar;'>>>statements=sqlparse.split(ra...