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 2016-09-26 19:43 UTC

DeleteStatement::parse() D

↳ Parent: DeleteStatement

Complexity

Conditions	41
Paths	22

Size

Total Lines	177
Code Lines	111

Duplication

Lines	32
Ratio	18.08 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	41
eloc	111
c	1
b	0
f	0
nc	22
nop	2
dl	32
loc	177
rs	4.1818

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
 * @license    https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+
 */
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;

        /**
         * If the query is multi-table or not
         *
         * @var bool $multiTable
         */
        $multiTable = false;

        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;
            }

            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;
                } else {
                    $parser->error(__('Unexpected token.'), $token);
                    break;
                }
            } elseif ($state === 2) {
                if ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'USING'
                ) {
                    ++$list->idx; // Skip 'USING'
                    $this->using = ExpressionArray::parse($parser, $list);
                    $state = 3;

                    $multiTable = true;
                } elseif ($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.'), $token);
                    break;
                }
            } elseif ($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) {
                    $parser->error(__('Unexpected keyword.'), $token);
                    break;
                } else {
                    $parser->error(__('Unexpected token.'), $token);
                    break;
                }
            } elseif ($state === 4) {
                if ($multiTable === true
                    && $token->type === Token::TYPE_KEYWORD
                ) {
                    $parser->error(
                        __('This type of clause is not valid in Multi-table queries.'),
                        $token
                    );
                    break;
                }

                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.'), $token);
                    break;
                }
            } elseif ($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;
                }
            }
        }

        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		* @license https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+
51		*/
52		class DeleteStatement extends Statement
53		{
54
55		/**
56		* Options for `DELETE` statements.
57		*
58		* @var array
59		*/
60		public static $OPTIONS = array(
61		'LOW_PRIORITY' => 1,
62		'QUICK' => 2,
63		'IGNORE' => 3,
64		);
65
66		/**
67		* Table(s) used as sources for this statement.
68		*
69		* @var Expression[]
70		*/
71		public $from;
72
73		/**
74		* Tables used as sources for this statement
75		*
76		* @var Expression[]
77		*/
78		public $using;
79
80		/**
81		* Columns used in this statement
82		*
83		* @var Expression[]
84		*/
85		public $columns;
86
87		/**
88		* Partitions used as source for this statement.
89		*
90		* @var ArrayObj
91		*/
92		public $partition;
93
94		/**
95		* Conditions used for filtering each row of the result set.
96		*
97		* @var Condition[]
98		*/
99		public $where;
100
101		/**
102		* Specifies the order of the rows in the result set.
103		*
104		* @var OrderKeyword[]
105		*/
106		public $order;
107
108		/**
109		* Conditions used for limiting the size of the result set.
110		*
111		* @var Limit
112		*/
113		public $limit;
114
115
116		/**
117		* @return string
118		*/
119		public function build()
120		{
121		$ret = 'DELETE ' . OptionsArray::build($this->options);
122
123	View Code Duplication	if ($this->columns != NULL && count($this->columns) > 0) {
124		$ret .= ' ' . ExpressionArray::build($this->columns);
125		}
126	View Code Duplication	if ($this->from != NULL && count($this->from) > 0) {
127		$ret .= ' FROM ' . ExpressionArray::build($this->from);
128		}
129	View Code Duplication	if ($this->using != NULL && count($this->using) > 0) {
130		$ret .= ' USING ' . ExpressionArray::build($this->using);
131		}
132		if ($this->where != NULL && count($this->where) > 0) {
133		$ret .= ' WHERE ' . Condition::build($this->where);
134		}
135	View Code Duplication	if ($this->order != NULL && count($this->order) > 0) {
136		$ret .= ' ORDER BY ' . ExpressionArray::build($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) $x); Loading history...
137		}
138		if ($this->limit != NULL && count($this->limit) > 0) {
139		$ret .= ' LIMIT ' . Limit::build($this->limit);
140		}
141
142		return $ret;
143
144		}
145
146
147		/**
148		* @param Parser $parser The instance that requests parsing.
149		* @param TokensList $list The list of tokens to be parsed.
150		*
151		* @return void
152		*/
153		public function parse(Parser $parser, TokensList $list)
154		{
155		++$list->idx; // Skipping `DELETE`.
156
157		// parse any options if provided
158		$this->options = OptionsArray::parse(
159		$parser,
160		$list,
161		static::$OPTIONS
162		);
163		++$list->idx;
164
165		/**
166		* The state of the parser.
167		*
168		* Below are the states of the parser.
169		*
170		* 0 ---------------------------------[ FROM ]----------------------------------> 2
171		* 0 ------------------------------[ table[.*] ]--------------------------------> 1
172		* 1 ---------------------------------[ FROM ]----------------------------------> 2
173		* 2 --------------------------------[ USING ]----------------------------------> 3
174		* 2 --------------------------------[ WHERE ]----------------------------------> 4
175		* 2 --------------------------------[ ORDER ]----------------------------------> 5
176		* 2 --------------------------------[ LIMIT ]----------------------------------> 6
177		*
178		* @var int $state
179		*/
180		$state = 0;
181
182		/**
183		* If the query is multi-table or not
184		*
185		* @var bool $multiTable
186		*/
187		$multiTable = false;
188
189		for (; $list->idx < $list->count; ++$list->idx) {
190		/**
191		* Token parsed at this moment.
192		*
193		* @var Token $token
194		*/
195		$token = $list->tokens[$list->idx];
196
197		// End of statement.
198		if ($token->type === Token::TYPE_DELIMITER) {
199		break;
200		}
201
202		if ($state === 0) {
203		if ($token->type === Token::TYPE_KEYWORD
204		&& $token->value !== 'FROM'
205		) {
206		$parser->error(__('Unexpected keyword.'), $token);
207		break;
208		} elseif ($token->type === Token::TYPE_KEYWORD
209		&& $token->value === 'FROM'
210		) {
211		++$list->idx; // Skip 'FROM'
212		$this->from = ExpressionArray::parse($parser, $list);
213		$state = 2;
214		} else {
215		$this->columns = ExpressionArray::parse($parser, $list);
216		$state = 1;
217		}
218	View Code Duplication	} elseif ($state === 1) {
219		if ($token->type === Token::TYPE_KEYWORD
220		&& $token->value !== 'FROM'
221		) {
222		$parser->error(__('Unexpected keyword.'), $token);
223		break;
224		} elseif ($token->type === Token::TYPE_KEYWORD
225		&& $token->value === 'FROM'
226		) {
227		++$list->idx; // Skip 'FROM'
228		$this->from = ExpressionArray::parse($parser, $list);
229		$state = 2;
230		} else {
231		$parser->error(__('Unexpected token.'), $token);
232		break;
233		}
234		} elseif ($state === 2) {
235		if ($token->type === Token::TYPE_KEYWORD
236		&& $token->value === 'USING'
237		) {
238		++$list->idx; // Skip 'USING'
239		$this->using = ExpressionArray::parse($parser, $list);
240		$state = 3;
241
242		$multiTable = true;
243		} elseif ($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.'), $token);
263		break;
264		}
265	View Code Duplication	} elseif ($state === 3) {
266		if ($token->type === Token::TYPE_KEYWORD
267		&& $token->value === 'WHERE'
268		) {
269		++$list->idx; // Skip 'WHERE'
270		$this->where = Condition::parse($parser, $list);
271		$state = 4;
272		} elseif ($token->type === Token::TYPE_KEYWORD) {
273		$parser->error(__('Unexpected keyword.'), $token);
274		break;
275		} else {
276		$parser->error(__('Unexpected token.'), $token);
277		break;
278		}
279		} elseif ($state === 4) {
280		if ($multiTable === true
281		&& $token->type === Token::TYPE_KEYWORD
282		) {
283		$parser->error(
284		__('This type of clause is not valid in Multi-table queries.'),
285		$token
286		);
287		break;
288		}
289
290		if ($token->type === Token::TYPE_KEYWORD
291		&& $token->value === 'ORDER BY'
292		) {
293		++$list->idx; // Skip 'ORDER BY'
294		$this->order = OrderKeyword::parse($parser, $list);
295		$state = 5;
296		} elseif ($token->type === Token::TYPE_KEYWORD
297		&& $token->value === 'LIMIT'
298		) {
299		++$list->idx; // Skip 'LIMIT'
300		$this->limit = Limit::parse($parser, $list);
301		$state = 6;
302		} elseif ($token->type === Token::TYPE_KEYWORD) {
303		$parser->error(__('Unexpected keyword.'), $token);
304		break;
305		}
306		} elseif ($state === 5) {
307		if ($token->type === Token::TYPE_KEYWORD
308		&& $token->value === 'LIMIT'
309		) {
310		++$list->idx; // Skip 'LIMIT'
311		$this->limit = Limit::parse($parser, $list);
312		$state = 6;
313		} elseif ($token->type === Token::TYPE_KEYWORD) {
314		$parser->error(__('Unexpected keyword.'), $token);
315		break;
316		}
317		}
318		}
319
320		if ($state >= 2) {
321		foreach ($this->from as $from_expr) {
322		$from_expr->database = $from_expr->table;
323		$from_expr->table = $from_expr->column;
324		$from_expr->column = null;
325		}
326		}
327
328		--$list->idx;
329		}
330		}
331

phpmyadmin / sql-parser

Pull Request — master (#87)

DeleteStatement::parse() D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

Duplication Side-by-Side

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