Check if a column exists in the given table.

Parameters

string $table: The name of the table in drupal (no prefixing).

string $column: The name of the column.

Return value

bool TRUE if the given column exists, otherwise FALSE.

3 calls to Schema::fieldExists()

Schema::addField in core/modules/mysql/src/Driver/Database/mysql/Schema.php

Add a new field to a table.

Schema::changeField in core/modules/mysql/src/Driver/Database/mysql/Schema.php

Change a field definition.

Schema::dropField in core/modules/mysql/src/Driver/Database/mysql/Schema.php

Drop a field.

2 methods override Schema::fieldExists()

Schema::fieldExists in core/modules/sqlite/src/Driver/Database/sqlite/Schema.php

Check if a column exists in the given table.

Schema::fieldExists in core/modules/pgsql/src/Driver/Database/pgsql/Schema.php

Check if a column exists in the given table.

File

core/lib/Drupal/Core/Database/Schema.php, line 248

Class

Schema

Provides a base implementation for Database Schema.

Namespace

Drupal\Core\Database

Code

public function fieldExists($table, $column) {
  $condition = $this->buildTableNameCondition($table);
  $condition->condition('column_name', $column);
  $condition->compile($this->connection, $this);
  // Normally, we would heartily discourage the use of string
  // concatenation for conditionals like this however, we
  // couldn't use \Drupal::database()->select() here because it would prefix
  // information_schema.tables and the query would fail.
  // Don't use {} around information_schema.columns table.
  return (bool) $this->connection
    ->query("SELECT 1 FROM information_schema.columns WHERE " . (string) $condition, $condition->arguments())
    ->fetchField();
}

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