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Name Type Location Description
module_exists function drupal/includes/module.inc Determines whether a given module exists.
db_index_exists function drupal/includes/database/database.inc Checks if an index exists in the given table.
db_table_exists function drupal/includes/database/database.inc Checks if a table exists.
db_field_exists function drupal/includes/database/database.inc Checks if a column exists in the given table.
FILE_EXISTS_ERROR constant drupal/includes/file.inc Flag for dealing with existing files: Do nothing and return FALSE.
_blog_post_exists function drupal/modules/blog/blog.module Helper function to determine if a user has blog posts already.
MergeQuery::exists function drupal/includes/database/query.inc Implements QueryConditionInterface::exists().
FILE_EXISTS_RENAME constant drupal/includes/file.inc Flag for dealing with existing files: Appends number until name is unique.
SelectQuery::exists function drupal/includes/database/select.inc Sets a condition that the specified subquery returns values.
FILE_EXISTS_REPLACE constant drupal/includes/file.inc Flag for dealing with existing files: Replace the existing file.
DeleteQuery::exists function drupal/includes/database/query.inc Implements QueryConditionInterface::exists().
UpdateQuery::exists function drupal/includes/database/query.inc Implements QueryConditionInterface::exists().
filter_format_exists function drupal/modules/filter/filter.module Determines if a text format exists.
MergeQuery::notExists function drupal/includes/database/query.inc Implements QueryConditionInterface::notExists().
SelectQuery::notExists function drupal/includes/database/select.inc Sets a condition that the specified subquery returns no values.
DeleteQuery::notExists function drupal/includes/database/query.inc Implements QueryConditionInterface::notExists().
UpdateQuery::notExists function drupal/includes/database/query.inc Implements QueryConditionInterface::notExists().
DatabaseCondition::exists function drupal/includes/database/query.inc Implements QueryConditionInterface::exists().
SelectQuery::havingExists function drupal/includes/database/select.inc
shortcut_set_title_exists function drupal/modules/shortcut/shortcut.module Check to see if a shortcut set with the given title already exists.
menu_edit_menu_name_exists function drupal/modules/menu/menu.admin.inc Returns whether a menu name already exists.
DatabaseSchema::tableExists function drupal/includes/database/schema.inc Check if a table exists.
DatabaseSchema::fieldExists function drupal/includes/database/schema.inc Check if a column exists in the given table.
DatabaseSchema::indexExists function drupal/includes/database/schema.inc Checks if an index exists in the given table.
_field_ui_field_name_exists function drupal/modules/field_ui/field_ui.admin.inc Render API callback: Checks if a field machine name is taken.
ThemeRegistry::offsetExists function drupal/includes/theme.inc Implements ArrayAccess::offsetExists().
SelectQueryExtender::exists function drupal/includes/database/select.inc Sets a condition that the specified subquery returns values.
DatabaseCondition::notExists function drupal/includes/database/query.inc Implements QueryConditionInterface::notExists().
SelectQuery::havingNotExists function drupal/includes/database/select.inc
DrupalCacheArray::offsetExists function drupal/includes/bootstrap.inc Implements ArrayAccess::offsetExists().
drupal_array_nested_key_exists function drupal/includes/common.inc Determines whether a nested array contains the requested keys.
SelectQueryExtender::notExists function drupal/includes/database/select.inc Sets a condition that the specified subquery returns no values.
QueryConditionInterface::exists function drupal/includes/database/query.inc Sets a condition that the specified subquery returns values.
CacheTestCase::checkCacheExists function drupal/modules/simpletest/tests/cache.test Check whether or not a cache entry exists.
CommentHelperCase::commentExists function drupal/modules/comment/comment.test Checks current page for specified comment.
CacheTestCase::assertCacheExists function drupal/modules/simpletest/tests/cache.test Assert or a cache entry exists.
DatabaseSchema_mysql::indexExists function drupal/includes/database/mysql/schema.inc Checks if an index exists in the given table.
DatabaseSchema_mysql::tableExists function drupal/includes/database/mysql/schema.inc Check if a table exists.
DatabaseSchema_mysql::fieldExists function drupal/includes/database/mysql/schema.inc Check if a column exists in the given table.
DatabaseSchema_pgsql::indexExists function drupal/includes/database/pgsql/schema.inc Checks if an index exists in the given table.
DatabaseSchema_sqlite::indexExists function drupal/includes/database/sqlite/schema.inc Checks if an index exists in the given table.
QueryConditionInterface::notExists function drupal/includes/database/query.inc Sets a condition that the specified subquery returns no values.
DatabaseSchema_sqlite::tableExists function drupal/includes/database/sqlite/schema.inc Check if a table exists.
DatabaseSchema_sqlite::fieldExists function drupal/includes/database/sqlite/schema.inc Check if a column exists in the given table.
FileFieldTestCase::assertFileExists function drupal/modules/file/tests/file.test Asserts that a file exists physically on disk.
DatabaseSchemaObjectExistsException class drupal/includes/database/schema.inc Exception thrown if an object being created already exists.
FileFieldTestCase::assertFileNotExists function drupal/modules/file/tests/file.test Asserts that a file does not exist on disk.
DatabaseSchema_pgsql::constraintExists function drupal/includes/database/pgsql/schema.inc Helper function: check if a constraint (PK, FK, UK) exists.
FileFieldTestCase::assertFileEntryExists function drupal/modules/file/tests/file.test Asserts that a file exists in the database.
FileFieldTestCase::assertFileEntryNotExists function drupal/modules/file/tests/file.test Asserts that a file does not exist in the database.

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