- How Do I Close Microsoft Database Daemon On A Mac
- How Do I Close Microsoft Database Daemon On A Windows 10
- How Do I Close Microsoft Database Daemon On A Computer
- How Do I Close Microsoft Database Daemon On A Windows 7
- In the address bar, go to edge://history. At the top right corner, there is a button that says Clear browsing data. Select All time as your time range.
- Microsoft Access 2007, 2010, 2013 and 2016. Open the Access Options form. For Access 2010 and later, from the File menu, select Options. For Access 2007, from the Office button, select Access Options. Select the Current Database item on the left border. Check the 'Compact on Close' box.
- A light-weight editor that can run on-demand SQL queries, view and save results as text, JSON, or Excel. Edit data, organize your favorite database connections, and browse database objects in a familiar object browsing experience. Manage a SQL Server instance or database with full GUI support.
The filter daemon host process (fdhost.exe). For security reasons, filters are loaded by separate processes called the filter daemon hosts. The fdhost.exe processes are created by an FDHOST launcher service (MSSQLFDLauncher), and they run under the security credentials of the FDHOST launcher service account.
APPLIES TO: SQL Server Azure SQL Database Azure Synapse Analytics Parallel Data Warehouse
Full-Text Search in SQL Server and Azure SQL Database lets users and applications run full-text queries against character-based data in SQL Server tables.
Basic tasks
This topic provides an overview of Full-Text Search and describes its components and its architecture. If you prefer to get started right away, here are the basic tasks.
Note
Full-Text Search is an optional component of the SQL Server Database Engine. If you didn't select Full-Text Search when you installed SQL Server, run SQL Server Setup again to add it.
Overview
A full-text index includes one or more character-based columns in a table. These columns can have any of the following data types: char, varchar, nchar, nvarchar, text, ntext, image, xml, or varbinary(max) and FILESTREAM. Each full-text index indexes one or more columns from the table, and each column can use a specific language.
Full-text queries perform linguistic searches against text data in full-text indexes by operating on words and phrases based on the rules of a particular language such as English or Japanese. Full-text queries can include simple words and phrases or multiple forms of a word or phrase. A full-text query returns any documents that contain at least one match (also known as a hit). A match occurs when a target document contains all the terms specified in the full-text query, and meets any other search conditions, such as the distance between the matching terms.
Full-Text Search queries
After columns have been added to a full-text index, users and applications can run full-text queries on the text in the columns. These queries can search for any of the following:
One or more specific words or phrases (simple term)
A word or a phrase where the words begin with specified text (prefix term)
Inflectional forms of a specific word (generation term)
A word or phrase close to another word or phrase (proximity term)
Synonymous forms of a specific word (thesaurus)
Words or phrases using weighted values (weighted term)
Full-text queries are not case-sensitive. For example, searching for 'Aluminum' or 'aluminum' returns the same results.
Full-text queries use a small set of Transact-SQL predicates (CONTAINS and FREETEXT) and functions (CONTAINSTABLE and FREETEXTTABLE). However, the search goals of a given business scenario influence the structure of the full-text queries. For example:
e-business-searching for a product on a website:
Recruitment scenario-searching for job candidates that have experience working with SQL Server:
For more information, see Query with Full-Text Search.
Compare Full-Text Search queries to the LIKE predicate
In contrast to full-text search, the LIKE Transact-SQL predicate works on character patterns only. Also, you cannot use the LIKE predicate to query formatted binary data. Furthermore, a LIKE query against a large amount of unstructured text data is much slower than an equivalent full-text query against the same data. A LIKE query against millions of rows of text data can take minutes to return; whereas a full-text query can take only seconds or less against the same data, depending on the number of rows that are returned.
Full-Text Search architecture
Full-text search architecture consists of the following processes:
The SQL Server process (sqlservr.exe).
The filter daemon host process (fdhost.exe).
For security reasons, filters are loaded by separate processes called the filter daemon hosts. The fdhost.exe processes are created by an FDHOST launcher service (MSSQLFDLauncher), and they run under the security credentials of the FDHOST launcher service account. Therefore, the FDHOST launcher service must be running for full-text indexing and full-text querying to work. For information about setting the service account for this service, see Set the Service Account for the Full-text Filter Daemon Launcher.
These two processes contain the components of the full-text search architecture. These components and their relationships are summarized in the following illustration. The components are described after the illustration.
SQL Server process
The SQL Server process uses the following components for full-text search:
User tables. These tables contain the data to be full-text indexed.
Full-text gatherer. The full-text gatherer works with the full-text crawl threads. It is responsible for scheduling and driving the population of full-text indexes, and also for monitoring full-text catalogs.
Thesaurus files. These files contain synonyms of search terms. For more information, see Configure and Manage Thesaurus Files for Full-Text Search.
Stoplist objects. Stoplist objects contain a list of common words that are not useful for the search. For more information, see Configure and Manage Stopwords and Stoplists for Full-Text Search.
SQL Server query processor. The query processor compiles and executes SQL queries. If a SQL query includes a full-text search query, the query is sent to the Full-Text Engine, both during compilation and during execution. The query result is matched against the full-text index.
Full-Text Engine. The Full-Text Engine in SQL Server is fully integrated with the query processor. The Full-Text Engine compiles and executes full-text queries. As part of query execution, the Full-Text Engine might receive input from the thesaurus and stoplist.
Note
In SQL Server 2008 and later versions, the Full-Text Engine resides in the SQL Server process, rather than in a separate service. Integrating the Full-Text Engine into the Database Engine improved full-text manageability, optimization of mixed query, and overall performance.
Index writer (indexer). The index writer builds the structure that is used to store the indexed tokens.
Filter daemon manager. The filter daemon manager is responsible for monitoring the status of the Full-Text Engine filter daemon host.
Filter Daemon Host process
The filter daemon host is a process that is started by the Full-Text Engine. It runs the following full-text search components, which are responsible for accessing, filtering, and word breaking data from tables, as well as for word breaking and stemming the query input.
The components of the filter daemon host are as follows:
Protocol handler. This component pulls the data from memory for further processing and accesses data from a user table in a specified database. One of its responsibilities is to gather data from the columns being full-text indexed and pass it to the filter daemon host, which will apply filtering and word breaker as required.
Filters. Some data types require filtering before the data in a document can be full-text indexed, including data in varbinary, varbinary(max), image, or xml columns. The filter used for a given document depends on its document type. For example, different filters are used for Microsoft Word (.doc) documents, Microsoft Excel (.xls) documents, and XML (.xml) documents. Then the filter extracts chunks of text from the document, removing embedded formatting and retaining the text and, potentially, information about the position of the text. The result is a stream of textual information. For more information, see Configure and Manage Filters for Search.
Word breakers and stemmers. A word breaker is a language-specific component that finds word boundaries based on the lexical rules of a given language (word breaking). Each word breaker is associated with a language-specific stemmer component that conjugates verbs and performs inflectional expansions. At indexing time, the filter daemon host uses a word breaker and stemmer to perform linguistic analysis on the textual data from a given table column. The language that is associated with a table column in the full-text index determines which word breaker and stemmer are used for indexing the column. For more information, see Configure and Manage Word Breakers and Stemmers for Search.
Note
SQL Server 2012 (11.x) installs a new version of the word breakers and stemmers for US English (LCID 1033) and UK English (LCID 2057).However you can switch to the previous version of these components if you want to retain the previous behavior. For more information, see Change the Word Breaker Used for US English and UK English.
Full-Text Search processing
Full-text search is powered by the Full-Text Engine. The Full-Text Engine has two roles: indexing support and querying support.
Full-Text indexing process
When a full-text population (also known as a crawl) is initiated, the Full-Text Engine pushes large batches of data into memory and notifies the filter daemon host. The host filters and word breaks the data and converts the converted data into inverted word lists. The full-text search then pulls the converted data from the word lists, processes the data to remove stopwords, and persists the word lists for a batch into one or more inverted indexes.
When indexing data stored in a varbinary(max) or image column, the filter, which implements the IFilter interface, extracts text based on the specified file format for that data (for example, Microsoft Word). In some cases, the filter components require the varbinary(max), or image data to be written out to the filterdata folder, instead of being pushed into memory.
As part of processing, the gathered text data is passed through a word breaker to separate the text into individual tokens, or keywords. The language used for tokenization is specified at the column level, or can be identified within varbinary(max), image, or xml data by the filter component.
Additional processing may be performed to remove stopwords, and to normalize tokens before they are stored in the full-text index or an index fragment.
When a population has completed, a final merge process is triggered that merges the index fragments together into one master full-text index. This results in improved query performance since only the master index needs to be queried rather than a number of index fragments, and better scoring statistics may be used for relevance ranking.
Full-Text querying process
The query processor passes the full-text portions of a query to the Full-Text Engine for processing. The Full-Text Engine performs word breaking and, optionally, thesaurus expansions, stemming, and stopword (noise-word) processing. Then the full-text portions of the query are represented in the form of SQL operators, primarily as streaming table-valued functions (STVFs). During query execution, these STVFs access the inverted index to retrieve the correct results. The results are either returned to the client at this point, or they are further processed before being returned to the client.
Full-text index architecture
The information in full-text indexes is used by the Full-Text Engine to compile full-text queries that can quickly search a table for particular words or combinations of words. A full-text index stores information about significant words and their location within one or more columns of a database table. A full-text index is a special type of token-based functional index that is built and maintained by the Full-Text Engine for SQL Server. The process of building a full-text index differs from building other types of indexes. Instead of constructing a B-tree structure based on a value stored in a particular row, the Full-Text Engine builds an inverted, stacked, compressed index structure based on individual tokens from the text being indexed. The size of a full-text index is limited only by the available memory resources of the computer on which the instance of SQL Server is running.
Beginning in SQL Server 2008, the full-text indexes are integrated with the Database Engine, instead of residing in the file system as in previous versions of SQL Server. For a new database, the full-text catalog is now a virtual object that does not belong to any filegroup; it is merely a logical concept that refers to a group of the full-text indexes. Note, however, that during upgrade of a SQL Server 2005 (9.x) database, any full-text catalog that contains data files, a new filegroup is created; for more information, see Upgrade Full-Text Search.
Only one full-text index is allowed per table. For a full-text index to be created on a table, the table must have a single, unique nonnull column. You can build a full-text index on columns of type char, varchar, nchar, nvarchar, text, ntext, image, xml, varbinary, and varbinary(max) can be indexed for full-text search. Creating a full-text index on a column whose data type is varbinary, varbinary(max), image, or xml requires that you specify a type column. A type column is a table column in which you store the file extension (.doc, .pdf, .xls, and so forth) of the document in each row.
Full-text index structure
A good understanding of the structure of a full-text index will help you understand how the Full-Text Engine works. This topic uses the following excerpt of the Document table in Adventure Works as an example table. This excerpt shows only two columns, the DocumentID column and the Title column, and three rows from the table.
For this example, we will assume that a full-text index has been created on the Title column.
| DocumentID | Title |
|---|---|
| 1 | Crank Arm and Tire Maintenance |
| 2 | Front Reflector Bracket and Reflector Assembly 3 |
| 3 | Front Reflector Bracket Installation |
For example, the following table, which shows Fragment 1, depicts the contents of the full-text index created on the Title column of the Document table. Full-text indexes contain more information than is presented in this table. The table is a logical representation of a full-text index and is provided for demonstration purposes only. The rows are stored in a compressed format to optimize disk usage.
Notice that the data has been inverted from the original documents. Inversion occurs because the keywords are mapped to the document IDs. For this reason, a full-text index is often referred to as an inverted index.
Also notice that the keyword 'and' has been removed from the full-text index. This is done because 'and' is a stopword, and removing stopwords from a full-text index can lead to substantial savings in disk space thereby improving query performance. For more information about stopwords, see Configure and Manage Stopwords and Stoplists for Full-Text Search.
Fragment 1
| Keyword | ColId | DocId | Occurrence |
|---|---|---|---|
| Crank | 1 | 1 | 1 |
| Arm | 1 | 1 | 2 |
| Tire | 1 | 1 | 4 |
| Maintenance | 1 | 1 | 5 |
| Front | 1 | 2 | 1 |
| Front | 1 | 3 | 1 |
| Reflector | 1 | 2 | 2 |
| Reflector | 1 | 2 | 5 |
| Reflector | 1 | 3 | 2 |
| Bracket | 1 | 2 | 3 |
| Bracket | 1 | 3 | 3 |
| Assembly | 1 | 2 | 6 |
| 3 | 1 | 2 | 7 |
| Installation | 1 | 3 | 4 |
The Keyword column contains a representation of a single token extracted at indexing time. Word breakers determine what makes up a token.
The ColId column contains a value that corresponds to a particular column that is full-text indexed.
The DocId column contains values for an eight-byte integer that maps to a particular full-text key value in a full-text indexed table. This mapping is necessary when the full-text key is not an integer data type. In such cases, mappings between full-text key values and DocId values are maintained in a separate table called the DocId Mapping table. To query for these mappings use the sp_fulltext_keymappings system stored procedure. To satisfy a search condition, DocId values from the above table need to be joined with the DocId Mapping table to retrieve rows from the base table being queried. If the full-text key value of the base table is an integer type, the value directly serves as the DocId and no mapping is necessary. Therefore, using integer full-text key values can help optimize full-text queries.
The Occurrence column contains an integer value. For each DocId value, there is a list of occurrence values that correspond to the relative word offsets of the particular keyword within that DocId. Occurrence values are useful in determining phrase or proximity matches, for example, phrases have numerically adjacent occurrence values. They are also useful in computing relevance scores; for example, the number of occurrences of a keyword in a DocId may be used in scoring.
Full-text index fragments
The logical full-text index is usually split across multiple internal tables. Each internal table is called a full-text index fragment. Some of these fragments might contain newer data than others. For example, if a user updates the following row whose DocId is 3 and the table is auto change-tracked, a new fragment is created.
| DocumentID | Title |
|---|---|
| 3 | Rear Reflector |
In the following example, which shows Fragment 2, the fragment contains newer data about DocId 3 compared to Fragment 1. Therefore, when the user queries for 'Rear Reflector' the data from Fragment 2 is used for DocId 3. Each fragment is marked with a creation timestamp that can be queried by using the sys.fulltext_index_fragments catalog view.
Fragment 2
| Keyword | ColId | DocId | Occ |
|---|---|---|---|
| Rear | 1 | 3 | 1 |
| Reflector | 1 | 3 | 2 |
As can be seen from Fragment 2, full-text queries need to query each fragment internally and discard older entries. Therefore, too many full-text index fragments in the full-text index can lead to substantial degradation in query performance. To reduce the number of fragments, reorganize the fulltext catalog by using the REORGANIZE option of the ALTER FULLTEXT CATALOGTransact-SQL statement. This statement performs a master merge, which merges the fragments into a single larger fragment and removes all obsolete entries from the full-text index.
After being reorganized, the example index would contain the following rows:
| Keyword | ColId | DocId | Occ |
|---|---|---|---|
| Crank | 1 | 1 | 1 |
| Arm | 1 | 1 | 2 |
| Tire | 1 | 1 | 4 |
| Maintenance | 1 | 1 | 5 |
| Front | 1 | 2 | 1 |
| Rear | 1 | 3 | 1 |
| Reflector | 1 | 2 | 2 |
| Reflector | 1 | 2 | 5 |
| Reflector | 1 | 3 | 2 |
| Bracket | 1 | 2 | 3 |
| Assembly | 1 | 2 | 6 |
| 3 | 1 | 2 | 7 |
Differences between full-text indexes and regular SQL Server indexes:.
| Full-text indexes | Regular SQL Server indexes |
|---|---|
| Only one full-text index allowed per table. | Several regular indexes allowed per table. |
| The addition of data to full-text indexes, called a population, can be requested through either a schedule or a specific request, or can occur automatically with the addition of new data. | Updated automatically when the data upon which they are based is inserted, updated, or deleted. |
| Grouped within the same database into one or more full-text catalogs. | Not grouped. |
Full-Text search linguistic components and language support
Full-text search supports almost 50 diverse languages, such as English, Spanish, Chinese, Japanese, Arabic, Bangla, and Hindi. For a complete list of the supported full-text languages, see sys.fulltext_languages (Transact-SQL). Each of the columns contained in the full-text index is associated with a Microsoft Windows locale identifier (LCID) that equates to a language that is supported by full-text search. For example, LCID 1033 equates to U.S English, and LCID 2057 equates to British English. For each supported full-text language, SQL Server provides linguistic components that support indexing and querying full-text data that is stored in that language.
Language-specific components include the following:
Word breakers and stemmers. A word breaker finds word boundaries based on the lexical rules of a given language (word breaking). Each word breaker is associated with a stemmer that conjugates verbs for the same language. For more information, see Configure and Manage Word Breakers and Stemmers for Search.
Stoplists. A system stoplist is provided that contains a basic set stopwords (also known as noise words). A stopword is a word that does not help the search and is ignored by full-text queries. For example, for the English locale words such as 'a', 'and', 'is', and 'the' are considered stopwords. Typically, you will need to configure one or more thesaurus files and stoplists. For more information, see Configure and Manage Stopwords and Stoplists for Full-Text Search.
Thesaurus files. SQL Server also installs a thesaurus file for each full-text language, as well as a global thesaurus file. The installed thesaurus files are essentially empty, but you can edit them to define synonyms for a specific language or business scenario. By developing a thesaurus tailored to your full-text data, you can effectively broaden the scope of full-text queries on that data. For more information, see Configure and Manage Thesaurus Files for Full-Text Search.
Filters (iFilters). Indexing a document in a varbinary(max), image, or xml data type column requires a filter to perform extra processing. The filter must be specific to the document type (.doc, .pdf, .xls, .xml, and so forth). For more information, see Configure and Manage Filters for Search.
Word breakers (and stemmers) and filters run in the filter daemon host process (fdhost.exe).
-->The Docker Engine and client aren't included with Windows and need to be installed and configured individually. Furthermore, the Docker Engine can accept many custom configurations. Some examples include configuring how the daemon accepts incoming requests, default networking options, and debug/log settings. On Windows, these configurations can be specified in a configuration file or by using Windows Service control manager. This document details how to install and configure the Docker Engine, and also provides some examples of commonly used configurations.
Install Docker
You need Docker in order to work with Windows Containers. Docker consists of the Docker Engine (dockerd.exe), and the Docker client (docker.exe). The easiest way to get everything installed is in the quickstart guide, which will help you get everything set up and run your first container.
For scripted installations, see Use a script to install Docker EE.
Before you can use Docker, you'll need to install the container images. For more information, see docs for our container base images.
Configure Docker with a configuration file
The preferred method for configuring the Docker Engine on Windows is using a configuration file. The configuration file can be found at 'C:ProgramDataDockerconfigdaemon.json'. You can create this file if it doesn't already exist.
Note
Not every available Docker configuration option applies to Docker on Windows. The following example shows the configuration options that do apply. For more information about Docker Engine configuration, see Docker daemon configuration file.
You only need to add the desired configuration changes to the configuration file. For example, the following sample configures the Docker Engine to accept incoming connections on port 2375. All other configuration options will use default values.
Likewise, the following sample configures the Docker daemon to keep images and containers in an alternate path. If not specified, thedefault is c:programdatadocker.
The following sample configures the Docker daemon to only accept secured connections over port 2376.
Configure Docker on the Docker service
The Docker Engine can also be configured by modifying the Docker service with sc config. Using this method, Docker Engine flags are set directly on the Docker service. Run the following command in a command prompt (cmd.exe not PowerShell):
Note
You don't need to run this command if your daemon.json file already contains the 'hosts': ['tcp://0.0.0.0:2375'] entry.
Common configuration
The following configuration file examples show common Docker configurations. These can be combined into a single configuration file.
Default network creation
To configure the Docker Engine so that it doesn't create a default NAT network, use the following configuration.
For more information, see Manage Docker Networks.
Set Docker security group
When you've signed in to the Docker host and are locally running Docker commands, these commands are run through a named pipe. By default, only members of the Administrators group can access the Docker Engine through the named pipe. To specify a security group that has this access, use the group flag.
Proxy configuration
To set proxy information for docker search and docker pull, create a Windows environment variable with the name HTTP_PROXY or HTTPS_PROXY, and a value of the proxy information. This can be completed with PowerShell using a command similar to this:
Once the variable has been set, restart the Docker service.
For more information, see Windows Configuration File on Docker.com.
How Do I Close Microsoft Database Daemon On A Mac
How to uninstall Docker
This section will tell you how to uninstall Docker and perform a full cleanup of Docker system components from your Windows 10 or Windows Server 2016 system.
Note
You must run all commands in these instructions from an elevated PowerShell session.
Prepare your system for Docker's removal
Before you uninstall Docker, make sure no containers are running on your system.
Run the following cmdlets to check for running containers:
It's also good practice to remove all containers, container images, networks, and volumes from your system before removing Docker. You can do this by running the following cmdlet:
Uninstall Docker
Next, you'll need to actually uninstall Docker.
To uninstall Docker on Windows 10
- Go to Settings > Apps on your Windows 10 machine
- Under Apps & Features, find Docker for Windows
- Go to Docker for Windows > Uninstall
To uninstall Docker on Windows Server 2016:
From an elevated PowerShell session, use the Uninstall-Package and Uninstall-Module cmdlets to remove the Docker module and its corresponding Package Management Provider from your system, as shown in the following example:
Tip
You can find the Package Provider that you used to install Docker with PS C:> Get-PackageProvider -Name *Docker*
Clean up Docker data and system components
After you uninstall Docker, you'll need to remove Docker's default networks so their configuration won't remain on your system after Docker is gone. You can do this by running the following cmdlet:
How Do I Close Microsoft Database Daemon On A Windows 10
To remove Docker's default networks on Windows Server 2016.
Run the following cmdlet to remove Docker's program data from your system:
You may also want to remove the Windows optional features associated with Docker/containers on Windows.
This includes the 'Containers' feature, which is automatically enabled on any Windows 10 or Windows Server 2016 when Docker is installed. It may also include the 'Hyper-V' feature, which is automatically enabled on Windows 10 when Docker is installed, but must be explicitly enabled on Windows Server 2016.
How Do I Close Microsoft Database Daemon On A Computer
Important
The Hyper-V feature is a general virtualization feature that enables much more than just containers. Before disabling the Hyper-V feature, make sure there are no other virtualized components on your system that require Hyper-V.
To remove Windows features on Windows 10:
- Go to Control Panel > Programs > Programs and Features > Turn Windows features on or off.
- Find the name of the feature or features you want to disable—in this case, Containers and (optionally) Hyper-V.
- Uncheck the box next to the name of the feature you want to disable.
- Select 'OK'
How Do I Close Microsoft Database Daemon On A Windows 7
To remove Windows features on Windows Server 2016:
From an elevated PowerShell session, run the following cmdlets to disable the Containers and (optionally) Hyper-V features from your system:
Reboot your system
To finish uninstallation and cleanup, run the following cmdlet from an elevated PowerShell session to reboot your system: