function Schema::tableExists

Same name in this branch
  1. 8.9.x core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php \Drupal\Core\Database\Driver\sqlite\Schema::tableExists()
  2. 8.9.x core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php \Drupal\Core\Database\Driver\pgsql\Schema::tableExists()
  3. 8.9.x core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::tableExists()
Same name in other branches
  1. 9 core/modules/sqlite/src/Driver/Database/sqlite/Schema.php \Drupal\sqlite\Driver\Database\sqlite\Schema::tableExists()
  2. 9 core/modules/pgsql/src/Driver/Database/pgsql/Schema.php \Drupal\pgsql\Driver\Database\pgsql\Schema::tableExists()
  3. 9 core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::tableExists()
  4. 10 core/modules/sqlite/src/Driver/Database/sqlite/Schema.php \Drupal\sqlite\Driver\Database\sqlite\Schema::tableExists()
  5. 10 core/modules/pgsql/src/Driver/Database/pgsql/Schema.php \Drupal\pgsql\Driver\Database\pgsql\Schema::tableExists()
  6. 10 core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::tableExists()
  7. 11.x core/modules/sqlite/src/Driver/Database/sqlite/Schema.php \Drupal\sqlite\Driver\Database\sqlite\Schema::tableExists()
  8. 11.x core/modules/pgsql/src/Driver/Database/pgsql/Schema.php \Drupal\pgsql\Driver\Database\pgsql\Schema::tableExists()
  9. 11.x core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::tableExists()

Overrides Schema::tableExists

8 calls to Schema::tableExists()
Schema::addField in core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
Add a new field to a table.
Schema::addIndex in core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
Add an index.
Schema::addPrimaryKey in core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
Add a primary key.
Schema::addUniqueKey in core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
Add a unique key.
Schema::dropTable in core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
Drop a table.

... See full list

File

core/lib/Drupal/Core/Database/Driver/mysql/Schema.php, line 701

Class

Schema
MySQL implementation of \Drupal\Core\Database\Schema.

Namespace

Drupal\Core\Database\Driver\mysql

Code

public function tableExists($table) {
    // The information_schema table is very slow to query under MySQL 5.0.
    // Instead, we try to select from the table in question.  If it fails,
    // the most likely reason is that it does not exist. That is dramatically
    // faster than using information_schema.
    // @link http://bugs.mysql.com/bug.php?id=19588
    // @todo This override should be removed once we require a version of MySQL
    //   that has that bug fixed.
    try {
        $this->connection
            ->queryRange("SELECT 1 FROM {" . $table . "}", 0, 1);
        return TRUE;
    } catch (\Exception $e) {
        return FALSE;
    }
}

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