Add Statement Iterator

Author: igor

README.md

@@ -158,6 +158,14 @@ print_r($statement->info());
 // if clickhouse-server version >= 54011
 $db->settings()->set('output_format_write_statistics',true);
 print_r($statement->statistics());
+
+
+// Statement Iterator
+$state=$this->client->select('SELECT (number+1) as nnums FROM system.numbers LIMIT 5');
+foreach ($state as $key=>$value) {
+    echo $value['nnums'];
+}
+
 ```
 
 Select result as tree:

src/Statement.php

@@ -9,7 +9,7 @@
 use ClickHouseDB\Transport\CurlerRequest;
 use ClickHouseDB\Transport\CurlerResponse;
 
-class Statement
+class Statement implements \Iterator
 {
     /**
      * @var string|mixed
@@ -339,14 +339,6 @@ public function totals()
         return $this->totals;
     }
 
-    /**
-     *
-     */
-    public function dumpRaw()
-    {
-        print_r($this->_rawData);
-    }
-
     /**
      *
      */
@@ -580,4 +572,29 @@ private function array_to_tree($arr, $path = null)
         }
         return $tree;
     }
+
+
+    public function rewind(): void {
+        $this->iterator = 0;
+    }
+
+    public function current() {
+        if (!isset($this->array_data[$this->iterator])) {
+            return null;
+        }
+        return $this->array_data[$this->iterator];
+    }
+
+    public function key(): int {
+        return $this->iterator;
+    }
+
+    public function next(): void {
+        ++$this->iterator;
+    }
+
+    public function valid(): bool {
+        $this->init();
+        return isset($this->array_data[$this->iterator]);
+    }
 }

tests/ClientTest.php

@@ -273,6 +273,18 @@ public function testInsertNestedArray()
 
     }
 
+
+    public function testStatementIterator()
+    {
+        $calc=0;
+        $state=$this->client->select('SELECT (number+1) as nnums FROM system.numbers LIMIT 5');
+        foreach ($state as $key=>$value) {
+            $calc+=$value['nnums'];
+        }
+        $this->assertEquals(15,$calc);
+    }
+
+
     public function testRFCCSVAndTSVWrite()
     {
 

tests/ConditionsTest.php

@@ -224,12 +224,8 @@ public function testSqlConditions()
             '|ZERO|| FORMAT JSON',
             $this->client->selectAsync('{if FALSE}FALSE{/if}|{if ZERO}ZERO{/if}|{if NULL}NULL{/if}| ' ,$isset)->sql()
         );
-
-
-
     }
 
-
     public function testSqlDisableConditions()
     {
         $this->assertEquals('SELECT * FROM ZZZ {if limit}LIMIT {limit}{/if} FORMAT JSON',  $this->client->selectAsync('SELECT * FROM ZZZ {if limit}LIMIT {limit}{/if}', [])->sql());