Add postgres RANDOM

Author: barlito

README.md

@@ -16,7 +16,7 @@ MySQL, Oracle, PostgreSQL and SQLite.
 | MySQL | `ACOS, ADDTIME, AES_DECRYPT, AES_ENCRYPT, ANY_VALUE, ASCII, ASIN, ATAN, ATAN2, BINARY, BIT_COUNT, BIT_XOR, CAST, CEIL, CHAR_LENGTH, COLLATE, CONCAT_WS, CONVERT_TZ, COS, COT, COUNTIF, CRC32, DATE, DATE_FORMAT, DATEADD, DATEDIFF, DATESUB, DAY, DAYNAME, DAYOFWEEK, DAYOFYEAR, DEGREES, DIV, EXP, EXTRACT, FIELD, FIND_IN_SET, FLOOR, FORMAT, FROM_BASE64, FROM_UNIXTIME, GREATEST, GROUP_CONCAT, HEX, HOUR, IFELSE, IFNULL, INET_ATON, INET_NTOA, INET6_ATON, INET6_NTOA, INSTR, IS_IPV4, IS_IPV4_COMPAT, IS_IPV4_MAPPED, IS_IPV6, JSON_CONTAINS, JSON_DEPTH, JSON_LENGTH, LAG, LAST_DAY, LEAD, LEAST, LOG, LOG10, LOG2, LPAD, MAKEDATE, MATCH, MD5, MINUTE, MONTH, MONTHNAME, NOW, NULLIF, OVER, PERIOD_DIFF, PI, POWER, QUARTER, RADIANS, RAND, REGEXP, REPLACE, ROUND, RPAD, SECOND, SECTOTIME, SHA1, SHA2, SIN, SOUNDEX, STD, STDDEV, STRTODATE, STR_TO_DATE, SUBSTRING_INDEX, TAN, TIME, TIMEDIFF, TIMESTAMPADD, TIMESTAMPDIFF, TIMETOSEC, TRUNCATE, UNHEX, UNIX_TIMESTAMP, UTC_TIMESTAMP, UUID_SHORT, VARIANCE, WEEK, WEEKDAY, WEEKOFYEAR, YEAR, YEARMONTH, YEARWEEK` |
 | Oracle | `CEIL, DAY, FLOOR, HOUR, LISTAGG, MINUTE, MONTH, NVL, SECOND, TO_CHAR, TO_DATE, TRUNC, YEAR` |
 | SQLite | `CASE WHEN THEN ELSE END, DATE, DATE_FORMAT*, DAY, HOUR, IFNULL, JULIANDAY, MINUTE, MONTH, REPLACE, ROUND, SECOND, STRFTIME, WEEK, WEEKDAY, YEAR` |
-| PostgreSQL | `AT_TIME_ZONE, COUNT_FILTER, DATE, DATE_PART, DATE_TRUNC, DAY, EXTRACT, GREATEST, HOUR, LEAST, MINUTE, MONTH, REGEXP_REPLACE, SECOND, STRING_AGG, TO_CHAR, TO_DATE, YEAR` |
+| PostgreSQL | `AT_TIME_ZONE, COUNT_FILTER, DATE, DATE_PART, DATE_TRUNC, DAY, EXTRACT, GREATEST, HOUR, LEAST, MINUTE, MONTH, RANDOM, REGEXP_REPLACE, SECOND, STRING_AGG, TO_CHAR, TO_DATE, YEAR` |
 
 > Note: SQLite date functions are implemented as `strftime(format, value)`.
   SQLite only supports the [most common formats](https://www.sqlite.org/lang_datefunc.html),

config/postgres.yml

@@ -21,4 +21,5 @@ doctrine:
                 string_agg: DoctrineExtensions\Query\Postgresql\StringAgg
                 greatest: DoctrineExtensions\Query\Postgresql\Greatest
                 least: DoctrineExtensions\Query\Postgresql\Least
+                random: DoctrineExtensions\Query\Postgresql\Random
                 regexp_replace: DoctrineExtensions\Query\Postgresql\RegexpReplace

src/Query/Postgresql/Random.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace DoctrineExtensions\Query\Postgresql;
+
+use Doctrine\ORM\Query\AST\Functions\FunctionNode;
+use Doctrine\ORM\Query\AST\SimpleArithmeticExpression;
+use Doctrine\ORM\Query\Parser;
+use Doctrine\ORM\Query\SqlWalker;
+use Doctrine\ORM\Query\TokenType;
+
+class Random extends FunctionNode
+{
+    /** @var SimpleArithmeticExpression */
+    private $expression = null;
+
+    public function getSql(SqlWalker $sqlWalker): string
+    {
+        if ($this->expression) {
+            return 'RANDOM(' . $this->expression->dispatch($sqlWalker) . ')';
+        }
+
+        return 'RANDOM()';
+    }
+
+    public function parse(Parser $parser): void
+    {
+        $lexer = $parser->getLexer();
+        $parser->match(TokenType::T_IDENTIFIER);
+        $parser->match(TokenType::T_OPEN_PARENTHESIS);
+
+        if ($lexer->lookahead->type !== TokenType::T_CLOSE_PARENTHESIS) {
+            $this->expression = $parser->SimpleArithmeticExpression();
+        }
+
+        $parser->match(TokenType::T_CLOSE_PARENTHESIS);
+    }
+}

tests/Query/Postgresql/RandomTest.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace DoctrineExtensions\Tests\Query\Postgresql;
+
+use DoctrineExtensions\Tests\Query\PostgresqlTestCase;
+
+class RandomTest extends PostgresqlTestCase
+{
+    public function testRandWithParameter(): void
+    {
+        $this->assertDqlProducesSql(
+            'SELECT RANDOM(2) from DoctrineExtensions\Tests\Entities\Blank b',
+            'SELECT RANDOM(2) AS sclr_0 FROM Blank b0_'
+        );
+    }
+
+    public function testRandWithoutParameter(): void
+    {
+        $this->assertDqlProducesSql(
+            'SELECT RANDOM() from DoctrineExtensions\Tests\Entities\Blank b',
+            'SELECT RANDOM() AS sclr_0 FROM Blank b0_'
+        );
+    }
+}