DDLQueryBuilder::dropDefaultValue() - Code Metrics - Inspection of "Change visibility property construct `AbstractDDL..." - yiisoft/db-mssql - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 047b8e...53162b )

by Wilmer

created 2023-03-27 13:24 UTC

DDLQueryBuilder::dropDefaultValue() A

↳ Parent: DDLQueryBuilder

Complexity

Conditions	1
Paths	1

Size

Total Lines	6
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	1

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	4
c	1
b	0
f	0
nc	1
nop	2
dl	0
loc	6
ccs	5
cts	5
cp	1
crap	1
rs	10

<?php

declare(strict_types=1);

namespace Yiisoft\Db\Mssql;

use Exception;
use Throwable;
use Yiisoft\Db\Exception\InvalidArgumentException;
use Yiisoft\Db\Exception\NotSupportedException;
use Yiisoft\Db\Expression\Expression;
use Yiisoft\Db\QueryBuilder\AbstractDDLQueryBuilder;
use Yiisoft\Db\Schema\Builder\ColumnInterface;

use function array_diff;

/**
 * Implements a (Data Definition Language) SQL statements for MSSQL Server.
 */
final class DDLQueryBuilder extends AbstractDDLQueryBuilder
{
    /**
     * @throws InvalidArgumentException
     */
    public function addCommentOnColumn(string $table, string $column, string $comment): string
    {
        return $this->buildAddCommentSql($comment, $table, $column);
    }

    /**
     * @throws InvalidArgumentException
     */
    public function addCommentOnTable(string $table, string $comment): string
    {
        return $this->buildAddCommentSql($comment, $table);
    }

    /**
     * @throws Exception
     */
    public function addDefaultValue(string $table, string $name, string $column, mixed $value): string
    {
        return 'ALTER TABLE '
            . $this->quoter->quoteTableName($table)
            . ' ADD CONSTRAINT '
            . $this->quoter->quoteColumnName($name)
            . ' DEFAULT ' . ($value === null ? 'NULL' : (string) $this->quoter->quoteValue($value))
            . ' FOR ' . $this->quoter->quoteColumnName($column);
    }

    /**
     * @throws Exception
     */
    public function alterColumn(string $table, string $column, ColumnInterface|string $type): string
    {
        $sqlAfter = [$this->dropConstraintsForColumn($table, $column, 'D')];

        $columnName = $this->quoter->quoteColumnName($column);
        $tableName = $this->quoter->quoteTableName($table);
        $constraintBase = preg_replace('/[^a-z0-9_]/i', '', $table . '_' . $column);

        if ($type instanceof ColumnInterface) {
            $type->setFormat('{type}{length}{notnull}{append}');

            /** @psalm-var mixed $defaultValue */
            $defaultValue = $type->getDefault();
            if ($defaultValue !== null || $type->isNotNull() === false) {
                $sqlAfter[] = $this->addDefaultValue(
                    $table,
                    "DF_{$constraintBase}",
                    $column,
                    $defaultValue instanceof Expression ? $defaultValue : new Expression((string)$defaultValue)
                );
            }

            $checkValue = $type->getCheck();
            if ($checkValue !== null) {
                $sqlAfter[] = "ALTER TABLE {$tableName} ADD CONSTRAINT " .
                    $this->quoter->quoteColumnName("CK_{$constraintBase}") .
                    ' CHECK (' . ($defaultValue instanceof Expression ? $checkValue : new Expression($checkValue)) . ')';
            }

            if ($type->isUnique()) {
                $sqlAfter[] = "ALTER TABLE {$tableName} ADD CONSTRAINT " . $this->quoter->quoteColumnName("UQ_{$constraintBase}") . " UNIQUE ({$columnName})";
            }
        }

        return 'ALTER TABLE ' . $tableName
            . ' ALTER COLUMN '
            . $columnName . ' '
            . $this->queryBuilder->getColumnType($type) . "\n"
            . implode("\n", $sqlAfter);
    }

    /**
     * @throws NotSupportedException
     * @throws Throwable
     * @throws \Yiisoft\Db\Exception\Exception
     */
    public function checkIntegrity(string $schema = '', string $table = '', bool $check = true): string
    {
        $enable = $check ? 'CHECK' : 'NOCHECK';

        /** @psalm-var Schema $schemaInstance */
        $schemaInstance = $this->schema;
        $defaultSchema = $schema ?: $schemaInstance->getDefaultSchema() ?? '';
        /** @psalm-var string[] $tableNames */
        $tableNames = $schemaInstance->getTableSchema($table)
             ? [$table] : $schemaInstance->getTableNames($defaultSchema);
        $viewNames = $schemaInstance->getViewNames($defaultSchema);
        $tableNames = array_diff($tableNames, $viewNames);
        $command = '';

        foreach ($tableNames as $tableName) {
            $tableName = $this->quoter->quoteTableName("$defaultSchema.$tableName");
            $command .= "ALTER TABLE $tableName $enable CONSTRAINT ALL; ";
        }

        return $command;
    }

    /**
     * @throws InvalidArgumentException
     */
    public function dropCommentFromColumn(string $table, string $column): string
    {
        return $this->buildRemoveCommentSql($table, $column);
    }

    /**
     * @throws InvalidArgumentException
     */
    public function dropCommentFromTable(string $table): string
    {
        return $this->buildRemoveCommentSql($table);
    }

    public function dropDefaultValue(string $table, string $name): string
    {
        return 'ALTER TABLE '
            . $this->quoter->quoteTableName($table)
            . ' DROP CONSTRAINT '
            . $this->quoter->quoteColumnName($name);
    }

    public function dropColumn(string $table, string $column): string
    {
        return $this->dropConstraintsForColumn($table, $column)
            . "\nALTER TABLE "
            . $this->quoter->quoteTableName($table)
            . ' DROP COLUMN '
            . $this->quoter->quoteColumnName($column);
    }

    public function renameTable(string $oldName, string $newName): string
    {
        return 'sp_rename '
            . $this->quoter->quoteTableName($oldName) . ', '
            . $this->quoter->quoteTableName($newName);
    }

    public function renameColumn(string $table, string $oldName, string $newName): string
    {
        return 'sp_rename '
            . "'" . $this->quoter->quoteTableName($table) . '.' . $this->quoter->quoteColumnName($oldName) . "'" . ', '
            . $this->quoter->quoteColumnName($newName) . ', '
            . "'COLUMN'";
    }

    /**
     * Builds an SQL command for adding or updating a comment to a table or a column.
     *
     * The command built will check if a comment already exists. If so, it will be updated, otherwise, it will be added.
     *
     * @param string $comment The text of the comment to add.
     * @param string $table The table to comment or whose column is to comment.
     * @param string|null $column Optional, the name of the column to comment.
     * If empty, the command will add the comment to the table instead.
     *
     * @throws Exception
     * @throws InvalidArgumentException If the table doesn't exist.
     *
     * @return string The SQL statement for adding a comment.
     *
     * Note: The method will quote the `comment`, `table`, `column` parameter before using it in the generated SQL.
     */
    private function buildAddCommentSql(string $comment, string $table, string $column = null): string
    {
        $tableSchema = $this->schema->getTableSchema($table);

        if ($tableSchema === null) {
            throw new InvalidArgumentException("Table not found: $table");
        }

        $schemaName = $tableSchema->getSchemaName()
            ? "N'" . (string) $tableSchema->getSchemaName() . "'" : 'SCHEMA_NAME()';
        $tableName = 'N' . (string) $this->quoter->quoteValue($tableSchema->getName());
        $columnName = $column ? 'N' . (string) $this->quoter->quoteValue($column) : null;
        $comment = 'N' . (string) $this->quoter->quoteValue($comment);
        $functionParams = "
            @name = N'MS_description',
            @value = $comment,
            @level0type = N'SCHEMA', @level0name = $schemaName,
            @level1type = N'TABLE', @level1name = $tableName"
            . ($column ? ", @level2type = N'COLUMN', @level2name = $columnName" : '') . ';';

        return "
            IF NOT EXISTS (
                    SELECT 1
                    FROM fn_listextendedproperty (
                        N'MS_description',
                        'SCHEMA', $schemaName,
                        'TABLE', $tableName,
                        " . ($column ? "'COLUMN', $columnName " : ' DEFAULT, DEFAULT ') . "
                    )
            )
                EXEC sys.sp_addextendedproperty $functionParams
            ELSE
                EXEC sys.sp_updateextendedproperty $functionParams
        ";
    }

    /**
     * Builds an SQL command for removing a comment from a table or a column. The command built will check if a comment
     * already exists before trying to perform the removal.
     *
     * @param string $table The table that will have the comment removed or whose column will have the comment removed.
     * @param string|null $column Optional, the name of the column whose comment will be removed. If empty, the command
     * will remove the comment from the table instead.
     *
     * @throws Exception
     * @throws InvalidArgumentException If the table doesn't exist.
     *
     * @return string The SQL statement for removing the comment.
     *
     * Note: The method will quote the `table`, `column` parameter before using it in the generated SQL.
     */
    private function buildRemoveCommentSql(string $table, string $column = null): string
    {
        $tableSchema = $this->schema->getTableSchema($table);

        if ($tableSchema === null) {
            throw new InvalidArgumentException("Table not found: $table");
        }

        $schemaName = $tableSchema->getSchemaName()
            ? "N'" . (string) $tableSchema->getSchemaName() . "'" : 'SCHEMA_NAME()';
        $tableName = 'N' . (string) $this->quoter->quoteValue($tableSchema->getName());
        $columnName = $column ? 'N' . (string) $this->quoter->quoteValue($column) : null;

        return "
            IF EXISTS (
                    SELECT 1
                    FROM fn_listextendedproperty (
                        N'MS_description',
                        'SCHEMA', $schemaName,
                        'TABLE', $tableName,
                        " . ($column ? "'COLUMN', $columnName " : ' DEFAULT, DEFAULT ') . "
                    )
            )
                EXEC sys.sp_dropextendedproperty
                    @name = N'MS_description',
                    @level0type = N'SCHEMA', @level0name = $schemaName,
                    @level1type = N'TABLE', @level1name = $tableName"
                    . ($column ? ", @level2type = N'COLUMN', @level2name = $columnName" : '') . ';';
    }

    /**
     * Builds an SQL statement for dropping constraints for column of table.
     *
     * @param string $table The table whose constraint is to be dropped.
     * @param string $column the column whose constraint is to be dropped.
     * @param string $type type of constraint, leave empty for all types of constraints(for example: D - default,
     * 'UQ' - unique, 'C' - check)
     *
     * @return string the DROP CONSTRAINTS SQL
     *
     * @link https://docs.microsoft.com/sql/relational-databases/system-catalog-views/sys-objects-transact-sql
     *
     * Note: The method will quote the `table`, `column` parameter before using it in the generated SQL.
     */
    private function dropConstraintsForColumn(string $table, string $column, string $type = ''): string
    {
        return "DECLARE @tableName VARCHAR(MAX) = '" . $this->quoter->quoteTableName($table) . "'
DECLARE @columnName VARCHAR(MAX) = '{$column}'
WHILE 1=1 BEGIN
    DECLARE @constraintName NVARCHAR(128)
    SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
        FROM (
            SELECT sc.[constid] object_id
            FROM [sys].[sysconstraints] sc
            JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
            WHERE sc.[id] = OBJECT_ID(@tableName)
            UNION
            SELECT object_id(i.[name]) FROM [sys].[indexes] i
            JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
            JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
            WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
        ) cons
        JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
        " . (!empty($type) ? " WHERE so.[type]='{$type}'" : '') . ")
    IF @constraintName IS NULL BREAK
    EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
END";
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\Db\Mssql;
6
7		use Exception;
8		use Throwable;
9		use Yiisoft\Db\Exception\InvalidArgumentException;
10		use Yiisoft\Db\Exception\NotSupportedException;
11		use Yiisoft\Db\Expression\Expression;
12		use Yiisoft\Db\QueryBuilder\AbstractDDLQueryBuilder;
13		use Yiisoft\Db\Schema\Builder\ColumnInterface;
14
15		use function array_diff;
16
17		/**
18		* Implements a (Data Definition Language) SQL statements for MSSQL Server.
19		*/
20		final class DDLQueryBuilder extends AbstractDDLQueryBuilder
21		{
22		/**
23		* @throws InvalidArgumentException
24		*/
25	5	public function addCommentOnColumn(string $table, string $column, string $comment): string
26		{
27	5	return $this->buildAddCommentSql($comment, $table, $column);
28		}
29
30		/**
31		* @throws InvalidArgumentException
32		*/
33	4	public function addCommentOnTable(string $table, string $comment): string
34		{
35	4	return $this->buildAddCommentSql($comment, $table);
36		}
37
38		/**
39		* @throws Exception
40		*/
41	11	public function addDefaultValue(string $table, string $name, string $column, mixed $value): string
42		{
43	11	return 'ALTER TABLE '
44	11	. $this->quoter->quoteTableName($table)
45	11	. ' ADD CONSTRAINT '
46	11	. $this->quoter->quoteColumnName($name)
47	11	. ' DEFAULT ' . ($value === null ? 'NULL' : (string) $this->quoter->quoteValue($value))
48	11	. ' FOR ' . $this->quoter->quoteColumnName($column);
49		}
50
51		/**
52		* @throws Exception
53		*/
54	9	public function alterColumn(string $table, string $column, ColumnInterface\|string $type): string
55		{
56	9	$sqlAfter = [$this->dropConstraintsForColumn($table, $column, 'D')];
57
58	9	$columnName = $this->quoter->quoteColumnName($column);
59	9	$tableName = $this->quoter->quoteTableName($table);
60	9	$constraintBase = preg_replace('/[^a-z0-9_]/i', '', $table . '_' . $column);
61
62	9	if ($type instanceof ColumnInterface) {
63	8	$type->setFormat('{type}{length}{notnull}{append}');
64
65		/** @psalm-var mixed $defaultValue */
66	8	$defaultValue = $type->getDefault();
67	8	if ($defaultValue !== null \|\| $type->isNotNull() === false) {
68	6	$sqlAfter[] = $this->addDefaultValue(
69	6	$table,
70	6	"DF_{$constraintBase}",
71	6	$column,
72	6	$defaultValue instanceof Expression ? $defaultValue : new Expression((string)$defaultValue)
73	6	);
74		}
75
76	8	$checkValue = $type->getCheck();
77	8	if ($checkValue !== null) {
78	4	$sqlAfter[] = "ALTER TABLE {$tableName} ADD CONSTRAINT " .
79	4	$this->quoter->quoteColumnName("CK_{$constraintBase}") .
80	4	' CHECK (' . ($defaultValue instanceof Expression ? $checkValue : new Expression($checkValue)) . ')';
81		}
82
83	8	if ($type->isUnique()) {
84	3	$sqlAfter[] = "ALTER TABLE {$tableName} ADD CONSTRAINT " . $this->quoter->quoteColumnName("UQ_{$constraintBase}") . " UNIQUE ({$columnName})";
85		}
86		}
87
88	9	return 'ALTER TABLE ' . $tableName
89	9	. ' ALTER COLUMN '
90	9	. $columnName . ' '
91	9	. $this->queryBuilder->getColumnType($type) . "\n"
92	9	. implode("\n", $sqlAfter);
93		}
94
95		/**
96		* @throws NotSupportedException
97		* @throws Throwable
98		* @throws \Yiisoft\Db\Exception\Exception
99		*/
100	3	public function checkIntegrity(string $schema = '', string $table = '', bool $check = true): string
101		{
102	3	$enable = $check ? 'CHECK' : 'NOCHECK';
103
104		/** @psalm-var Schema $schemaInstance */
105	3	$schemaInstance = $this->schema;
106	3	$defaultSchema = $schema ?: $schemaInstance->getDefaultSchema() ?? '';
107		/** @psalm-var string[] $tableNames */
108	3	$tableNames = $schemaInstance->getTableSchema($table)
109	3	? [$table] : $schemaInstance->getTableNames($defaultSchema);
110	3	$viewNames = $schemaInstance->getViewNames($defaultSchema);
111	3	$tableNames = array_diff($tableNames, $viewNames);
112	3	$command = '';
113
114	3	foreach ($tableNames as $tableName) {
115	3	$tableName = $this->quoter->quoteTableName("$defaultSchema.$tableName");
116	3	$command .= "ALTER TABLE $tableName $enable CONSTRAINT ALL; ";
117		}
118
119	3	return $command;
120		}
121
122		/**
123		* @throws InvalidArgumentException
124		*/
125	3	public function dropCommentFromColumn(string $table, string $column): string
126		{
127	3	return $this->buildRemoveCommentSql($table, $column);
128		}
129
130		/**
131		* @throws InvalidArgumentException
132		*/
133	3	public function dropCommentFromTable(string $table): string
134		{
135	3	return $this->buildRemoveCommentSql($table);
136		}
137
138	4	public function dropDefaultValue(string $table, string $name): string
139		{
140	4	return 'ALTER TABLE '
141	4	. $this->quoter->quoteTableName($table)
142	4	. ' DROP CONSTRAINT '
143	4	. $this->quoter->quoteColumnName($name);
144		}
145
146	3	public function dropColumn(string $table, string $column): string
147		{
148	3	return $this->dropConstraintsForColumn($table, $column)
149	3	. "\nALTER TABLE "
150	3	. $this->quoter->quoteTableName($table)
151	3	. ' DROP COLUMN '
152	3	. $this->quoter->quoteColumnName($column);
153		}
154
155	3	public function renameTable(string $oldName, string $newName): string
156		{
157	3	return 'sp_rename '
158	3	. $this->quoter->quoteTableName($oldName) . ', '
159	3	. $this->quoter->quoteTableName($newName);
160		}
161
162	2	public function renameColumn(string $table, string $oldName, string $newName): string
163		{
164	2	return 'sp_rename '
165	2	. "'" . $this->quoter->quoteTableName($table) . '.' . $this->quoter->quoteColumnName($oldName) . "'" . ', '
166	2	. $this->quoter->quoteColumnName($newName) . ', '
167	2	. "'COLUMN'";
168		}
169
170		/**
171		* Builds an SQL command for adding or updating a comment to a table or a column.
172		*
173		* The command built will check if a comment already exists. If so, it will be updated, otherwise, it will be added.
174		*
175		* @param string $comment The text of the comment to add.
176		* @param string $table The table to comment or whose column is to comment.
177		* @param string\|null $column Optional, the name of the column to comment.
178		* If empty, the command will add the comment to the table instead.
179		*
180		* @throws Exception
181		* @throws InvalidArgumentException If the table doesn't exist.
182		*
183		* @return string The SQL statement for adding a comment.
184		*
185		* Note: The method will quote the `comment`, `table`, `column` parameter before using it in the generated SQL.
186		*/
187	9	private function buildAddCommentSql(string $comment, string $table, string $column = null): string
188		{
189	9	$tableSchema = $this->schema->getTableSchema($table);
190
191	9	if ($tableSchema === null) {
192	2	throw new InvalidArgumentException("Table not found: $table");
193		}
194
195	7	$schemaName = $tableSchema->getSchemaName()
196	7	? "N'" . (string) $tableSchema->getSchemaName() . "'" : 'SCHEMA_NAME()';
197	7	$tableName = 'N' . (string) $this->quoter->quoteValue($tableSchema->getName());
198	7	$columnName = $column ? 'N' . (string) $this->quoter->quoteValue($column) : null;
199	7	$comment = 'N' . (string) $this->quoter->quoteValue($comment);
200	7	$functionParams = "
201		@name = N'MS_description',
202	7	@value = $comment,
203	7	@level0type = N'SCHEMA', @level0name = $schemaName,
204	7	@level1type = N'TABLE', @level1name = $tableName"
205	7	. ($column ? ", @level2type = N'COLUMN', @level2name = $columnName" : '') . ';';
206
207	7	return "
208		IF NOT EXISTS (
209		SELECT 1
210		FROM fn_listextendedproperty (
211		N'MS_description',
212	7	'SCHEMA', $schemaName,
213	7	'TABLE', $tableName,
214	7	" . ($column ? "'COLUMN', $columnName " : ' DEFAULT, DEFAULT ') . "
215		)
216		)
217	7	EXEC sys.sp_addextendedproperty $functionParams
218		ELSE
219	7	EXEC sys.sp_updateextendedproperty $functionParams
220	7	";
221		}
222
223		/**
224		* Builds an SQL command for removing a comment from a table or a column. The command built will check if a comment
225		* already exists before trying to perform the removal.
226		*
227		* @param string $table The table that will have the comment removed or whose column will have the comment removed.
228		* @param string\|null $column Optional, the name of the column whose comment will be removed. If empty, the command
229		* will remove the comment from the table instead.
230		*
231		* @throws Exception
232		* @throws InvalidArgumentException If the table doesn't exist.
233		*
234		* @return string The SQL statement for removing the comment.
235		*
236		* Note: The method will quote the `table`, `column` parameter before using it in the generated SQL.
237		*/
238	6	private function buildRemoveCommentSql(string $table, string $column = null): string
239		{
240	6	$tableSchema = $this->schema->getTableSchema($table);
241
242	6	if ($tableSchema === null) {
243	2	throw new InvalidArgumentException("Table not found: $table");
244		}
245
246	4	$schemaName = $tableSchema->getSchemaName()
247	4	? "N'" . (string) $tableSchema->getSchemaName() . "'" : 'SCHEMA_NAME()';
248	4	$tableName = 'N' . (string) $this->quoter->quoteValue($tableSchema->getName());
249	4	$columnName = $column ? 'N' . (string) $this->quoter->quoteValue($column) : null;
250
251	4	return "
252		IF EXISTS (
253		SELECT 1
254		FROM fn_listextendedproperty (
255		N'MS_description',
256	4	'SCHEMA', $schemaName,
257	4	'TABLE', $tableName,
258	4	" . ($column ? "'COLUMN', $columnName " : ' DEFAULT, DEFAULT ') . "
259		)
260		)
261		EXEC sys.sp_dropextendedproperty
262		@name = N'MS_description',
263	4	@level0type = N'SCHEMA', @level0name = $schemaName,
264	4	@level1type = N'TABLE', @level1name = $tableName"
265	4	. ($column ? ", @level2type = N'COLUMN', @level2name = $columnName" : '') . ';';
266		}
267
268		/**
269		* Builds an SQL statement for dropping constraints for column of table.
270		*
271		* @param string $table The table whose constraint is to be dropped.
272		* @param string $column the column whose constraint is to be dropped.
273		* @param string $type type of constraint, leave empty for all types of constraints(for example: D - default,
274		* 'UQ' - unique, 'C' - check)
275		*
276		* @return string the DROP CONSTRAINTS SQL
277		*
278		* @link https://docs.microsoft.com/sql/relational-databases/system-catalog-views/sys-objects-transact-sql
279		*
280		* Note: The method will quote the `table`, `column` parameter before using it in the generated SQL.
281		*/
282	11	private function dropConstraintsForColumn(string $table, string $column, string $type = ''): string
283		{
284	11	return "DECLARE @tableName VARCHAR(MAX) = '" . $this->quoter->quoteTableName($table) . "'
285	11	DECLARE @columnName VARCHAR(MAX) = '{$column}'
286		WHILE 1=1 BEGIN
287		DECLARE @constraintName NVARCHAR(128)
288		SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
289		FROM (
290		SELECT sc.[constid] object_id
291		FROM [sys].[sysconstraints] sc
292		JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
293		WHERE sc.[id] = OBJECT_ID(@tableName)
294		UNION
295		SELECT object_id(i.[name]) FROM [sys].[indexes] i
296		JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
297		JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
298		WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
299		) cons
300		JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
301	11	" . (!empty($type) ? " WHERE so.[type]='{$type}'" : '') . ")
302		IF @constraintName IS NULL BREAK
303		EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
304	11	END";
305		}
306		}
307

yiisoft / db-mssql

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DDLQueryBuilder::dropDefaultValue() A

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