DeleteStatement::parse() - Code Metrics - Inspection of "Implement parsing and building for Delete Statemen..." - phpmyadmin/sql-parser - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#87)

by Deven

created 2016-09-24 09:33 UTC

DeleteStatement::parse() D

↳ Parent: DeleteStatement

Complexity

Conditions	46
Paths	28

Size

Total Lines	187
Code Lines	127

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	46
eloc	127
nc	28
nop	2
dl	0
loc	187
rs	4.1818
c	1
b	0
f	0

How to fix Long Method Complexity

<?php

/**
 * `DELETE` statement.
 *
 * @package    SqlParser
 * @subpackage Statements
 */
namespace SqlParser\Statements;

use SqlParser\Statement;
use SqlParser\Parser;
use SqlParser\Token;
use SqlParser\TokensList;
use SqlParser\Components\ArrayObj;
use SqlParser\Components\Expression;
use SqlParser\Components\ExpressionArray;
use SqlParser\Components\Limit;
use SqlParser\Components\OrderKeyword;
use SqlParser\Components\Condition;
use SqlParser\Components\OptionsArray;

/**
 * `DELETE` statement.
 *
 * DELETE [LOW_PRIORITY] [QUICK] [IGNORE] FROM tbl_name
 *     [PARTITION (partition_name,...)]
 *     [WHERE where_condition]
 *     [ORDER BY ...]
 *     [LIMIT row_count]
 *
 * Multi-table syntax
 *
 * DELETE [LOW_PRIORITY] [QUICK] [IGNORE]
 *   tbl_name[.*] [, tbl_name[.*]] ...
 *   FROM table_references
 *   [WHERE where_condition]
 *
 * OR
 *
 * DELETE [LOW_PRIORITY] [QUICK] [IGNORE]
 *   FROM tbl_name[.*] [, tbl_name[.*]] ...
 *   USING table_references
 *   [WHERE where_condition]
 *
 *
 * @category   Statements
 * @package    SqlParser
 * @subpackage Statements
 * @author     Dan Ungureanu <[email protected]>
 * @license    http://opensource.org/licenses/GPL-2.0 GNU Public License
 */
class DeleteStatement extends Statement
{

    /**
     * Options for `DELETE` statements.
     *
     * @var array
     */
    public static $OPTIONS = array(
        'LOW_PRIORITY'                  => 1,
        'QUICK'                         => 2,
        'IGNORE'                        => 3,
    );

    /**
     * Table(s) used as sources for this statement.
     *
     * @var Expression[]
     */
    public $from;

    /**
     * Tables used as sources for this statement
     *
     * @var Expression[]
     */
    public $using;

    /**
     * Columns used in this statement
     *
     * @var Expression[]
     */
    public $columns;

    /**
     * Partitions used as source for this statement.
     *
     * @var ArrayObj
     */
    public $partition;

    /**
     * Conditions used for filtering each row of the result set.
     *
     * @var Condition[]
     */
    public $where;

    /**
     * Specifies the order of the rows in the result set.
     *
     * @var OrderKeyword[]
     */
    public $order;

    /**
     * Conditions used for limiting the size of the result set.
     *
     * @var Limit
     */
    public $limit;


    /**
     * @return string
     */
    public function build()
    {
        $ret = 'DELETE ' . OptionsArray::build($this->options);

        if ($this->columns != NULL && count($this->columns) > 0) {
            $ret .= ' ' . ExpressionArray::build($this->columns);
        }
        if ($this->from != NULL && count($this->from) > 0) {
            $ret .= ' FROM ' . ExpressionArray::build($this->from);
        }
        if ($this->using != NULL && count($this->using) > 0) {
            $ret .= ' USING ' . ExpressionArray::build($this->using);
        }
        if ($this->where != NULL && count($this->where) > 0) {
            $ret .= ' WHERE ' . Condition::build($this->where);
        }
        if ($this->order != NULL && count($this->order) > 0) {
            $ret .= ' ORDER BY ' . ExpressionArray::build($this->order);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
        }
        if ($this->limit != NULL && count($this->limit) > 0) {
            $ret .= ' LIMIT ' . Limit::build($this->limit);
        }

        return $ret;

    }


    /**
     * @param Parser     $parser The instance that requests parsing.
     * @param TokensList $list   The list of tokens to be parsed.
     *
     * @return void
     */
    public function parse(Parser $parser, TokensList $list)
    {
        ++$list->idx; // Skipping `DELETE`.

        // parse any options if provided
        $this->options = OptionsArray::parse(
            $parser,
            $list,
            static::$OPTIONS
        );
        ++$list->idx;

        /**
         * The state of the parser.
         *
         * Below are the states of the parser.
         *
         *      0 ---------------------------------[ FROM ]----------------------------------> 2
         *      0 ------------------------------[ table[.*] ]--------------------------------> 1
         *      1 ---------------------------------[ FROM ]----------------------------------> 2
         *      2 --------------------------------[ USING ]----------------------------------> 3
         *      2 --------------------------------[ WHERE ]----------------------------------> 4
         *      2 --------------------------------[ ORDER ]----------------------------------> 5
         *      2 --------------------------------[ LIMIT ]----------------------------------> 6
         *
         * @var int $state
         */
        $state = 0;

        for (; $list->idx < $list->count; ++$list->idx) {
            /**
             * Token parsed at this moment.
             *
             * @var Token $token
             */
            $token = $list->tokens[$list->idx];

            // End of statement.
            if ($token->type === Token::TYPE_DELIMITER) {
                break;
            }

            // Skipping whitespaces and comments.
            if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
                continue;
            }

            if ($state === 0) {
                if ($token->type === Token::TYPE_KEYWORD
                    && $token->value !== 'FROM'
                ) {
                    $parser->error(__('Unexpected keyword.'), $token);
                    break;
                } elseif ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'FROM'
                ) {
                    ++$list->idx; // Skip 'FROM'
                    $this->from = ExpressionArray::parse($parser, $list);
                    $state = 2;
                } else {
                    $this->columns = ExpressionArray::parse($parser, $list);
                    $state = 1;
                }
            } elseif ($state === 1) {
                if ($token->type === Token::TYPE_KEYWORD
                    && $token->value !== 'FROM'
                ) {
                    $parser->error(__('Unexpected keyword.'), $token);
                    break;
                } elseif ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'FROM'
                ) {
                    ++$list->idx; // Skip 'FROM'
                    $this->from = ExpressionArray::parse($parser, $list);
                    $state = 2;
                }  elseif ($token->type === Token::TYPE_KEYWORD) {
                    $parser->error(__('Unexpected keyword.'), $token);
                    break;
                } else {
                    $parser->error(__('Unexpected token.'), $token);
                    break;
                }
            } elseif ($state === 2) {
                if ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'USING'
                ) {
                    ++$list->idx; // Skip 'FROM'
                    $this->using = ExpressionArray::parse($parser, $list);
                    $state = 3;
                } elseif ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'WHERE'
                ) {
                    ++$list->idx; // Skip 'WHERE'
                    $this->where = Condition::parse($parser, $list);
                    $state = 4;
                } elseif ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'ORDER BY'
                ) {
                    ++$list->idx; // Skip 'ORDER BY'
                    $this->order = OrderKeyword::parse($parser, $list);
                    $state = 5;
                } elseif ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'LIMIT'
                ) {
                    ++$list->idx; // Skip 'LIMIT'
                    $this->limit = Limit::parse($parser, $list);
                    $state = 6;
                } elseif ($token->type === Token::TYPE_KEYWORD) {
                    $parser->error(__('Unexpected keyword.'), $token);
                    break;
                } else {
                    $parser->error(__('Unexpected token.'), $token);
                    break;
                }
            } elseif ($state === 3) {
                if ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'WHERE'
                ) {
                    ++$list->idx; // Skip 'WHERE'
                    $this->where = Condition::parse($parser, $list);
                    $state = 4;
                } elseif ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'ORDER BY'
                ) {
                    ++$list->idx; // Skip 'ORDER  BY'
                    $this->order = OrderKeyword::parse($parser, $list);
                    $state = 5;
                }  elseif ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'LIMIT'
                ) {
                    ++$list->idx; // Skip 'LIMIT'
                    $this->limit = Limit::parse($parser, $list);
                    $state = 6;
                } elseif ($token->type === Token::TYPE_KEYWORD) {
                    $parser->error(__('Unexpected keyword.'), $token);
                    break;
                } else {
                    $parser->error(__('Unexpected token.'), $token);
                    break;
                }
            } elseif ($state === 4) {
                if ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'ORDER BY'
                ) {
                    ++$list->idx; // Skip 'ORDER  BY'
                    $this->order = OrderKeyword::parse($parser, $list);
                    $state = 5;
                }  elseif ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'LIMIT'
                ) {
                    ++$list->idx; // Skip 'LIMIT'
                    $this->limit = Limit::parse($parser, $list);
                    $state = 6;
                } elseif ($token->type === Token::TYPE_KEYWORD) {
                    $parser->error(__('Unexpected keyword.'), $token);
                    break;
                } else {
                    $parser->error(__('Unexpected token.'), $token);
                    break;
                }
            } elseif ($state === 5) {
                if ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'LIMIT'
                ) {
                    ++$list->idx; // Skip 'LIMIT'
                    $this->limit = Limit::parse($parser, $list);
                    $state = 6;
                } elseif ($token->type === Token::TYPE_KEYWORD) {
                    $parser->error(__('Unexpected keyword.'), $token);
                    break;
                } else {
                    $parser->error(__('Unexpected token.'), $token);
                    break;
                }
            }
        }

        if ($state >= 2) {
            foreach ($this->from as $from_expr) {
                $from_expr->database = $from_expr->table;
                $from_expr->table = $from_expr->column;
                $from_expr->column = null;
            }
        }

        --$list->idx;
    }
}


1		<?php
2
3		/**
4		* `DELETE` statement.
5		*
6		* @package SqlParser
7		* @subpackage Statements
8		*/
9		namespace SqlParser\Statements;
10
11		use SqlParser\Statement;
12		use SqlParser\Parser;
13		use SqlParser\Token;
14		use SqlParser\TokensList;
15		use SqlParser\Components\ArrayObj;
16		use SqlParser\Components\Expression;
17		use SqlParser\Components\ExpressionArray;
18		use SqlParser\Components\Limit;
19		use SqlParser\Components\OrderKeyword;
20		use SqlParser\Components\Condition;
21		use SqlParser\Components\OptionsArray;
22
23		/**
24		* `DELETE` statement.
25		*
26		* DELETE [LOW_PRIORITY] [QUICK] [IGNORE] FROM tbl_name
27		* [PARTITION (partition_name,...)]
28		* [WHERE where_condition]
29		* [ORDER BY ...]
30		* [LIMIT row_count]
31		*
32		* Multi-table syntax
33		*
34		* DELETE [LOW_PRIORITY] [QUICK] [IGNORE]
35		* tbl_name[.] [, tbl_name[.]] ...
36		* FROM table_references
37		* [WHERE where_condition]
38		*
39		* OR
40		*
41		* DELETE [LOW_PRIORITY] [QUICK] [IGNORE]
42		* FROM tbl_name[.] [, tbl_name[.]] ...
43		* USING table_references
44		* [WHERE where_condition]
45		*
46		*
47		* @category Statements
48		* @package SqlParser
49		* @subpackage Statements
50		* @author Dan Ungureanu <[email protected]>
51		* @license http://opensource.org/licenses/GPL-2.0 GNU Public License
52		*/
53		class DeleteStatement extends Statement
54		{
55
56		/**
57		* Options for `DELETE` statements.
58		*
59		* @var array
60		*/
61		public static $OPTIONS = array(
62		'LOW_PRIORITY' => 1,
63		'QUICK' => 2,
64		'IGNORE' => 3,
65		);
66
67		/**
68		* Table(s) used as sources for this statement.
69		*
70		* @var Expression[]
71		*/
72		public $from;
73
74		/**
75		* Tables used as sources for this statement
76		*
77		* @var Expression[]
78		*/
79		public $using;
80
81		/**
82		* Columns used in this statement
83		*
84		* @var Expression[]
85		*/
86		public $columns;
87
88		/**
89		* Partitions used as source for this statement.
90		*
91		* @var ArrayObj
92		*/
93		public $partition;
94
95		/**
96		* Conditions used for filtering each row of the result set.
97		*
98		* @var Condition[]
99		*/
100		public $where;
101
102		/**
103		* Specifies the order of the rows in the result set.
104		*
105		* @var OrderKeyword[]
106		*/
107		public $order;
108
109		/**
110		* Conditions used for limiting the size of the result set.
111		*
112		* @var Limit
113		*/
114		public $limit;
115
116
117		/**
118		* @return string
119		*/
120		public function build()
121		{
122		$ret = 'DELETE ' . OptionsArray::build($this->options);
123
124	View Code Duplication	if ($this->columns != NULL && count($this->columns) > 0) {
125		$ret .= ' ' . ExpressionArray::build($this->columns);
126		}
127	View Code Duplication	if ($this->from != NULL && count($this->from) > 0) {
128		$ret .= ' FROM ' . ExpressionArray::build($this->from);
129		}
130	View Code Duplication	if ($this->using != NULL && count($this->using) > 0) {
131		$ret .= ' USING ' . ExpressionArray::build($this->using);
132		}
133		if ($this->where != NULL && count($this->where) > 0) {
134		$ret .= ' WHERE ' . Condition::build($this->where);
135		}
136	View Code Duplication	if ($this->order != NULL && count($this->order) > 0) {
137		$ret .= ' ORDER BY ' . ExpressionArray::build($this->order);
		0 ignored issues – show Documentation introduced 2016-09-24 10:35 UTC by Report Bug Copy Issue Report `$this->order` is of type `array<integer,object<Sql...mponents\OrderKeyword>>`, but the function expects a `array<integer,object<Sql...Components\Expression>>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
138		}
139		if ($this->limit != NULL && count($this->limit) > 0) {
140		$ret .= ' LIMIT ' . Limit::build($this->limit);
141		}
142
143		return $ret;
144
145		}
146
147
148		/**
149		* @param Parser $parser The instance that requests parsing.
150		* @param TokensList $list The list of tokens to be parsed.
151		*
152		* @return void
153		*/
154		public function parse(Parser $parser, TokensList $list)
155		{
156		++$list->idx; // Skipping `DELETE`.
157
158		// parse any options if provided
159		$this->options = OptionsArray::parse(
160		$parser,
161		$list,
162		static::$OPTIONS
163		);
164		++$list->idx;
165
166		/**
167		* The state of the parser.
168		*
169		* Below are the states of the parser.
170		*
171		* 0 ---------------------------------[ FROM ]----------------------------------> 2
172		* 0 ------------------------------[ table[.*] ]--------------------------------> 1
173		* 1 ---------------------------------[ FROM ]----------------------------------> 2
174		* 2 --------------------------------[ USING ]----------------------------------> 3
175		* 2 --------------------------------[ WHERE ]----------------------------------> 4
176		* 2 --------------------------------[ ORDER ]----------------------------------> 5
177		* 2 --------------------------------[ LIMIT ]----------------------------------> 6
178		*
179		* @var int $state
180		*/
181		$state = 0;
182
183		for (; $list->idx < $list->count; ++$list->idx) {
184		/**
185		* Token parsed at this moment.
186		*
187		* @var Token $token
188		*/
189		$token = $list->tokens[$list->idx];
190
191		// End of statement.
192		if ($token->type === Token::TYPE_DELIMITER) {
193		break;
194		}
195
196		// Skipping whitespaces and comments.
197		if (($token->type === Token::TYPE_WHITESPACE) \|\| ($token->type === Token::TYPE_COMMENT)) {
198		continue;
199		}
200
201		if ($state === 0) {
202		if ($token->type === Token::TYPE_KEYWORD
203		&& $token->value !== 'FROM'
204		) {
205		$parser->error(__('Unexpected keyword.'), $token);
206		break;
207		} elseif ($token->type === Token::TYPE_KEYWORD
208		&& $token->value === 'FROM'
209		) {
210		++$list->idx; // Skip 'FROM'
211		$this->from = ExpressionArray::parse($parser, $list);
212		$state = 2;
213		} else {
214		$this->columns = ExpressionArray::parse($parser, $list);
215		$state = 1;
216		}
217		} elseif ($state === 1) {
218		if ($token->type === Token::TYPE_KEYWORD
219		&& $token->value !== 'FROM'
220		) {
221		$parser->error(__('Unexpected keyword.'), $token);
222		break;
223		} elseif ($token->type === Token::TYPE_KEYWORD
224		&& $token->value === 'FROM'
225		) {
226		++$list->idx; // Skip 'FROM'
227		$this->from = ExpressionArray::parse($parser, $list);
228		$state = 2;
229		} elseif ($token->type === Token::TYPE_KEYWORD) {
230		$parser->error(__('Unexpected keyword.'), $token);
231		break;
232		} else {
233		$parser->error(__('Unexpected token.'), $token);
234		break;
235		}
236		} elseif ($state === 2) {
237		if ($token->type === Token::TYPE_KEYWORD
238		&& $token->value === 'USING'
239		) {
240		++$list->idx; // Skip 'FROM'
241		$this->using = ExpressionArray::parse($parser, $list);
242		$state = 3;
243		} elseif ($token->type === Token::TYPE_KEYWORD
244		&& $token->value === 'WHERE'
245		) {
246		++$list->idx; // Skip 'WHERE'
247		$this->where = Condition::parse($parser, $list);
248		$state = 4;
249		} elseif ($token->type === Token::TYPE_KEYWORD
250		&& $token->value === 'ORDER BY'
251		) {
252		++$list->idx; // Skip 'ORDER BY'
253		$this->order = OrderKeyword::parse($parser, $list);
254		$state = 5;
255		} elseif ($token->type === Token::TYPE_KEYWORD
256		&& $token->value === 'LIMIT'
257		) {
258		++$list->idx; // Skip 'LIMIT'
259		$this->limit = Limit::parse($parser, $list);
260		$state = 6;
261		} elseif ($token->type === Token::TYPE_KEYWORD) {
262		$parser->error(__('Unexpected keyword.'), $token);
263		break;
264		} else {
265		$parser->error(__('Unexpected token.'), $token);
266		break;
267		}
268		} elseif ($state === 3) {
269		if ($token->type === Token::TYPE_KEYWORD
270		&& $token->value === 'WHERE'
271		) {
272		++$list->idx; // Skip 'WHERE'
273		$this->where = Condition::parse($parser, $list);
274		$state = 4;
275		} elseif ($token->type === Token::TYPE_KEYWORD
276		&& $token->value === 'ORDER BY'
277		) {
278		++$list->idx; // Skip 'ORDER BY'
279		$this->order = OrderKeyword::parse($parser, $list);
280		$state = 5;
281		} elseif ($token->type === Token::TYPE_KEYWORD
282		&& $token->value === 'LIMIT'
283		) {
284		++$list->idx; // Skip 'LIMIT'
285		$this->limit = Limit::parse($parser, $list);
286		$state = 6;
287		} elseif ($token->type === Token::TYPE_KEYWORD) {
288		$parser->error(__('Unexpected keyword.'), $token);
289		break;
290		} else {
291		$parser->error(__('Unexpected token.'), $token);
292		break;
293		}
294		} elseif ($state === 4) {
295		if ($token->type === Token::TYPE_KEYWORD
296		&& $token->value === 'ORDER BY'
297		) {
298		++$list->idx; // Skip 'ORDER BY'
299		$this->order = OrderKeyword::parse($parser, $list);
300		$state = 5;
301		} elseif ($token->type === Token::TYPE_KEYWORD
302		&& $token->value === 'LIMIT'
303		) {
304		++$list->idx; // Skip 'LIMIT'
305		$this->limit = Limit::parse($parser, $list);
306		$state = 6;
307		} elseif ($token->type === Token::TYPE_KEYWORD) {
308		$parser->error(__('Unexpected keyword.'), $token);
309		break;
310		} else {
311		$parser->error(__('Unexpected token.'), $token);
312		break;
313		}
314		} elseif ($state === 5) {
315		if ($token->type === Token::TYPE_KEYWORD
316		&& $token->value === 'LIMIT'
317		) {
318		++$list->idx; // Skip 'LIMIT'
319		$this->limit = Limit::parse($parser, $list);
320		$state = 6;
321		} elseif ($token->type === Token::TYPE_KEYWORD) {
322		$parser->error(__('Unexpected keyword.'), $token);
323		break;
324		} else {
325		$parser->error(__('Unexpected token.'), $token);
326		break;
327		}
328		}
329		}
330
331		if ($state >= 2) {
332		foreach ($this->from as $from_expr) {
333		$from_expr->database = $from_expr->table;
334		$from_expr->table = $from_expr->column;
335		$from_expr->column = null;
336		}
337		}
338
339		--$list->idx;
340		}
341		}
342

phpmyadmin / sql-parser

Pull Request — master (#87)

DeleteStatement::parse() D

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