Add date_trunc function for postgres (beberlei#350)

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, 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, 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_PART, DAY, EXTRACT, GREATEST, HOUR, LEAST, MINUTE, MONTH, REGEXP_REPLACE, SECOND, STRING_AGG, TO_CHAR, TO_DATE, YEAR` |
+| PostgreSQL | `AT_TIME_ZONE, COUNT_FILTER, DATE_PART, DATE_TRUNC, DAY, EXTRACT, GREATEST, HOUR, LEAST, MINUTE, MONTH, 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

@@ -12,7 +12,8 @@ doctrine:
                 at_time_zone: DoctrineExtensions\Query\Postgresql\AtTimeZoneFunction
                 date_part: DoctrineExtensions\Query\Postgresql\DatePart
                 extract: DoctrineExtensions\Query\Postgresql\ExtractFunction
-
+                date_trunc: DoctrineExtensions\Query\Postgresql\DateTrunc
+
             string_functions:
                 str_to_date: DoctrineExtensions\Query\Postgresql\StrToDate
                 count_filter: DoctrineExtensions\Query\Postgresql\CountFilterFunction

src/Query/Postgresql/DateTrunc.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace DoctrineExtensions\Query\Postgresql;
+
+use Doctrine\ORM\Query\AST\Functions\FunctionNode;
+use Doctrine\ORM\Query\Lexer;
+use Doctrine\ORM\Query\Parser;
+use Doctrine\ORM\Query\SqlWalker;
+
+class DateTrunc extends FunctionNode
+{
+    public $fieldText = null;
+
+    public $fieldTimestamp = null;
+
+    public function parse(Parser $parser)
+    {
+        $parser->match(Lexer::T_IDENTIFIER);
+        $parser->match(Lexer::T_OPEN_PARENTHESIS);
+        $this->fieldText = $parser->ArithmeticPrimary();
+        $parser->match(Lexer::T_COMMA);
+        $this->fieldTimestamp = $parser->ArithmeticPrimary();
+        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
+    }
+
+    public function getSql(SqlWalker $sqlWalker)
+    {
+        return sprintf(
+            'DATE_TRUNC(%s, %s)',
+            $this->fieldText->dispatch($sqlWalker),
+            $this->fieldTimestamp->dispatch($sqlWalker)
+        );
+    }
+}

tests/Query/Postgresql/DateTruncTest.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace DoctrineExtensions\Tests\Query\Postgresql;
+
+use Doctrine\ORM\QueryBuilder;
+use DoctrineExtensions\Tests\Query\PostgresqlTestCase;
+
+class DateTruncTest extends PostgresqlTestCase
+{
+    public function testDateTrunc()
+    {
+        $queryBuilder = new QueryBuilder($this->entityManager);
+        $queryBuilder
+            ->select("date_trunc('YEAR', dt.created)")
+            ->from('DoctrineExtensions\Tests\Entities\Date', 'dt');
+
+        $expected = "SELECT DATE_TRUNC('YEAR', d0_.created) AS sclr_0 FROM Date d0_";
+
+        $this->assertEquals($expected, $queryBuilder->getQuery()->getSQL());
+    }
+}