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语法定义

安全云脑 SecMaster-DQL语法定义:DQL语句

DQL语句语法定义 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99100101102103104105106107108109110111112113114115116117 query: values | { select | selectWithoutFrom | query UNION [ ALL ] query | query EXCEPT query | query INTERSECT query } [ ORDER BY orderItem [, orderItem ]* ] [ LIMIT { count | ALL } ] [ OFFSET start { ROW | ROWS } ] [ FETCH { FIRST | NEXT } [ count ] { ROW | ROWS } ONLY]orderItem: expression [ ASC | DESC ]select: SELECT [ ALL | DISTINCT ] { * | projectItem [, projectItem ]* } FROM tableExpression [ WHERE booleanExpression ] [ GROUP BY { groupItem [, groupItem ]* } ] [ HAVING booleanExpression ] [ WINDOW windowName AS windowSpec [, windowName AS windowSpec ]* ]selectWithoutFrom: SELECT [ ALL | DISTINCT ] { * | projectItem [, projectItem ]* }projectItem: expression [ [ AS ] columnAlias ] | tableAlias . *tableExpression: tableReference [, tableReference ]* | tableExpression [ NATURAL ] [ LEFT | RIGHT | FULL ] JOIN tableExpression [ joinCondition ]joinCondition: ON booleanExpression | USING '(' column [, column ]* ')'tableReference: tablePrimary [ matchRecognize ] [ [ AS ] alias [ '(' columnAlias [, columnAlias ]* ')' ] ]tablePrimary: [ TABLE ] [ [ catalogName . ] schemaName . ] tableName | LATERAL TABLE '(' functionName '(' expression [, expression ]* ')' ')' | UNNEST '(' expression ')'values: VALUES expression [, expression ]*groupItem: expression | '(' ')' | '(' expression [, expression ]* ')' | CUBE '(' expression [, expression ]* ')' | ROLLUP '(' expression [, expression ]* ')' | GROUPING SETS '(' groupItem [, groupItem ]* ')'windowRef: windowName | windowSpecwindowSpec: [ windowName ] '(' [ ORDER BY orderItem [, orderItem ]* ] [ PARTITION BY expression [, expression ]* ] [ RANGE numericOrIntervalExpression {PRECEDING} | ROWS numericExpression {PRECEDING} ] ')'matchRecognize: MATCH_RECOGNIZE '(' [ PARTITION BY expression [, expression ]* ] [ ORDER BY orderItem [, orderItem ]* ] [ MEASURES measureColumn [, measureColumn ]* ] [ ONE ROW PER MATCH ] [ AFTER MATCH ( SKIP TO NEXT ROW | SKIP PAST LAST ROW | SKIP TO FIRST variable | SKIP TO LAST variable | SKIP TO variable ) ] PATTERN '(' pattern ')' [ WITHIN intervalLiteral ] DEFINE variable AS condition [, variable AS condition ]* ')'measureColumn: expression AS aliaspattern: patternTerm [ '|' patternTerm ]*patternTerm: patternFactor [ patternFactor ]*patternFactor: variable [ patternQuantifier ]patternQuantifier: '*' | '*?' | '+' | '+?' | '?' | '??' | '{' { [ minRepeat ], [ maxRepeat ] } '}' ['?'] | '{' repeat '}'

安全云脑 SecMaster 语法定义
数据湖探索 DLI-CREATE FUNCTION语句:功能描述

功能描述创建一个有 catalog 和数据库命名空间的 catalog function ，需要指定一个 identifier ，可指定 language tag 。若catalog 中，已经有同名的函数注册了，则无法注册。如果 language tag 是 JAVA 或者 SCALA ，则 identifier 是 UDF 实现类的全限定名。如果您需要了解创建自定义函数的步骤请参考自定义函数。

数据湖探索 DLI DDL语法定义
数据湖探索 DLI-CREATE FUNCTION语句:语法说明

语法说明 TEMPORARY 创建一个有 catalog 和数据库命名空间的临时 catalog function ，并覆盖原有的 catalog function 。 TEMPORARY SYSTEM 创建一个没有数据库命名空间的临时系统 catalog function ，并覆盖系统内置的函数。 IF NOT EXISTS 如果该函数已经存在，则不会进行任何操作。 LANGUAGE JAVA|SCALA Language tag 用于指定 Flink runtime 如何执行这个函数。目前，只支持 JAVA, SCALA，且函数的默认语言为 JAVA。

数据湖探索 DLI DDL语法定义