QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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The QgsAbstractDatabaseProviderConnection class provides common functionality for DB based connections. More...
#include <qgsabstractdatabaseproviderconnection.h>
Classes | |
struct | QueryResult |
The QueryResult class represents the result of a query executed by execSql() More... | |
struct | SpatialIndexOptions |
The SpatialIndexOptions contains extra options relating to spatial index creation. More... | |
struct | SqlVectorLayerOptions |
The SqlVectorLayerOptions stores all information required to create a SQL (query) layer. More... | |
struct | TableProperty |
The TableProperty class represents a database table or view. More... | |
Public Types | |
typedef QFlags< Capability > | Capabilities |
enum | Capability { CreateVectorTable = 1 << 1 , DropRasterTable = 1 << 2 , DropVectorTable = 1 << 3 , RenameVectorTable = 1 << 4 , RenameRasterTable = 1 << 5 , CreateSchema = 1 << 6 , DropSchema = 1 << 7 , RenameSchema = 1 << 8 , ExecuteSql = 1 << 9 , Vacuum = 1 << 10 , Tables = 1 << 11 , Schemas = 1 << 12 , SqlLayers = 1 << 13 , TableExists = 1 << 14 , Spatial = 1 << 15 , CreateSpatialIndex = 1 << 16 , SpatialIndexExists = 1 << 17 , DeleteSpatialIndex = 1 << 18 , DeleteField = 1 << 19 , DeleteFieldCascade = 1 << 20 , AddField = 1 << 21 , ListFieldDomains = 1 << 22 , RetrieveFieldDomain = 1 << 23 , SetFieldDomain = 1 << 24 , AddFieldDomain = 1 << 25 , RenameField = 1 << 26 , RetrieveRelationships = 1 << 27 , AddRelationship = 1 << 28 , UpdateRelationship = 1 << 29 , DeleteRelationship = 1 << 30 } |
The Capability enum represents the operations supported by the connection. More... | |
typedef QFlags< GeometryColumnCapability > | GeometryColumnCapabilities |
enum | GeometryColumnCapability { Z = 1 << 1 , M = 1 << 2 , SinglePart = 1 << 3 , Curves = 1 << 4 , SinglePoint = 1 << 5 , SingleLineString = 1 << 6 , SinglePolygon = 1 << 7 , PolyhedralSurfaces = 1 << 8 } |
The GeometryColumnCapability enum represents the geometry column features supported by the connection. More... | |
enum class | TableFlag : int { Aspatial = 1 << 1 , Vector = 1 << 2 , Raster = 1 << 3 , View = 1 << 4 , MaterializedView = 1 << 5 , Foreign = 1 << 6 , IncludeSystemTables = 1 << 7 } |
Flags for table properties. More... | |
typedef QFlags< TableFlag > | TableFlags |
Public Member Functions | |
QgsAbstractDatabaseProviderConnection (const QString &name) | |
Creates a new connection with name by reading its configuration from the settings. | |
QgsAbstractDatabaseProviderConnection (const QString &uri, const QVariantMap &configuration) | |
Creates a new connection from the given uri and configuration. | |
virtual void | addField (const QgsField &field, const QString &schema, const QString &tableName) const |
Adds a field. | |
virtual void | addFieldDomain (const QgsFieldDomain &domain, const QString &schema) const |
Adds a new field domain to the database. | |
virtual void | addRelationship (const QgsWeakRelation &relationship) const |
Adds a new field relationship to the database. | |
Capabilities | capabilities () const |
Returns connection capabilities. | |
Qgis::DatabaseProviderConnectionCapabilities2 | capabilities2 () const |
Returns extended connection capabilities. | |
virtual void | createSchema (const QString &name) const |
Creates a new schema with the specified name. | |
virtual void | createSpatialIndex (const QString &schema, const QString &name, const QgsAbstractDatabaseProviderConnection::SpatialIndexOptions &options=QgsAbstractDatabaseProviderConnection::SpatialIndexOptions()) const |
Creates a spatial index for the database table with given schema and name (schema is ignored if not supported by the backend). | |
virtual QgsVectorLayer * | createSqlVectorLayer (const SqlVectorLayerOptions &options) const |
Creates and returns a (possibly invalid) vector layer based on the sql statement and optional options. | |
virtual void | createVectorTable (const QString &schema, const QString &name, const QgsFields &fields, Qgis::WkbType wkbType, const QgsCoordinateReferenceSystem &srs, bool overwrite, const QMap< QString, QVariant > *options) const |
Creates an empty table with name in the given schema (schema is ignored if not supported by the backend). | |
virtual void | deleteField (const QString &fieldName, const QString &schema, const QString &tableName, bool force=false) const |
Deletes the field with the specified name. | |
virtual void | deleteRelationship (const QgsWeakRelation &relationship) const |
Deletes an existing relationship in the database. | |
virtual void | deleteSpatialIndex (const QString &schema, const QString &name, const QString &geometryColumn) const |
Deletes the existing spatial index for the database table with given schema, name and geometryColumn (schema and geometryColumn are ignored if not supported by the backend). | |
virtual void | dropRasterTable (const QString &schema, const QString &name) const |
Drops a raster table with given schema (schema is ignored if not supported by the backend) and name. | |
virtual void | dropSchema (const QString &name, bool force=false) const |
Drops an entire schema with the specified name. | |
virtual void | dropVectorTable (const QString &schema, const QString &name) const |
Drops a vector (or aspatial) table with given schema (schema is ignored if not supported by the backend) and name. | |
virtual QueryResult | execSql (const QString &sql, QgsFeedback *feedback=nullptr) const |
Executes raw sql and returns the (possibly empty) query results, optionally feedback can be provided. | |
virtual QList< QList< QVariant > > | executeSql (const QString &sql, QgsFeedback *feedback=nullptr) const |
Executes raw sql and returns the (possibly empty) list of results in a multi-dimensional array, optionally feedback can be provided. | |
virtual QgsFieldDomain * | fieldDomain (const QString &name) const |
Returns the field domain with the specified name from the provider. | |
virtual QStringList | fieldDomainNames () const |
Returns a list of field domain names present on the provider. | |
virtual QgsFields | fields (const QString &schema, const QString &table, QgsFeedback *feedback=nullptr) const |
Returns the fields of a table and schema. | |
virtual GeometryColumnCapabilities | geometryColumnCapabilities () |
Returns connection geometry column capabilities (Z, M, SinglePart, Curves). | |
virtual QSet< QString > | illegalFieldNames () const |
Returns a list of field names which are considered illegal by the connection and should not be used when creating or altering fields. | |
virtual QList< QgsVectorDataProvider::NativeType > | nativeTypes () const =0 |
Returns a list of native types supported by the connection. | |
QString | providerKey () const |
Returns the provider key. | |
virtual QgsProviderSqlQueryBuilder * | queryBuilder () const |
Returns a SQL query builder for the connection, which provides an interface for provider-specific creation of SQL queries. | |
virtual QStringList | relatedTableTypes () const |
Returns a list of the related table types supported by the database format. | |
virtual QList< QgsWeakRelation > | relationships (const QString &schema=QString(), const QString &tableName=QString()) const |
Returns a list of relationships detected in the database. | |
virtual void | renameField (const QString &schema, const QString &tableName, const QString &name, const QString &newName) const |
Renames an existing field. | |
virtual void | renameRasterTable (const QString &schema, const QString &name, const QString &newName) const |
Renames a raster table with given schema (schema is ignored if not supported by the backend) and name. | |
virtual void | renameSchema (const QString &name, const QString &newName) const |
Renames a schema with the specified name. | |
virtual void | renameVectorTable (const QString &schema, const QString &name, const QString &newName) const |
Renames a vector or aspatial table with given schema (schema is ignored if not supported by the backend) and name. | |
virtual QStringList | schemas () const |
Returns information about the existing schemas. | |
virtual QList< QgsLayerMetadataProviderResult > | searchLayerMetadata (const QgsMetadataSearchContext &searchContext, const QString &searchString=QString(), const QgsRectangle &geographicExtent=QgsRectangle(), QgsFeedback *feedback=nullptr) const |
Search the stored layer metadata in the connection, optionally limiting the search to the metadata identifier, title, abstract, keywords and categories. | |
virtual void | setFieldAlias (const QString &fieldName, const QString &schema, const QString &tableName, const QString &alias) const |
Sets the alias for the existing field with the specified name. | |
virtual void | setFieldComment (const QString &fieldName, const QString &schema, const QString &tableName, const QString &comment) const |
Sets the comment for the existing field with the specified name. | |
virtual void | setFieldDomainName (const QString &fieldName, const QString &schema, const QString &tableName, const QString &domainName) const |
Sets the field domain name for the existing field with the specified name. | |
virtual bool | spatialIndexExists (const QString &schema, const QString &name, const QString &geometryColumn) const |
Determines whether a spatial index exists for the database table with given schema, name and geometryColumn (schema and geometryColumn are ignored if not supported by the backend). | |
virtual QMultiMap< Qgis::SqlKeywordCategory, QStringList > | sqlDictionary () |
Returns a dictionary of SQL keywords supported by the provider. | |
virtual Qgis::SqlLayerDefinitionCapabilities | sqlLayerDefinitionCapabilities () |
Returns SQL layer definition capabilities (Filters, GeometryColumn, PrimaryKeys). | |
virtual SqlVectorLayerOptions | sqlOptions (const QString &layerSource) |
Returns the SQL layer options from a layerSource. | |
virtual QList< Qgis::FieldDomainType > | supportedFieldDomainTypes () const |
Returns a list of field domain types which are supported by the provider. | |
virtual Qgis::RelationshipCapabilities | supportedRelationshipCapabilities () const |
Returns the relationship capabilities supported by the provider. | |
virtual QList< Qgis::RelationshipCardinality > | supportedRelationshipCardinalities () const |
Returns a list of relationship cardinalities which are supported by the provider. | |
virtual QList< Qgis::RelationshipStrength > | supportedRelationshipStrengths () const |
Returns a list of relationship strengths which are supported by the provider. | |
virtual QgsAbstractDatabaseProviderConnection::TableProperty | table (const QString &schema, const QString &table, QgsFeedback *feedback=nullptr) const |
Returns information on a table in the given schema. | |
virtual bool | tableExists (const QString &schema, const QString &name) const |
Checks whether a table name exists in the given schema. | |
virtual QList< QgsAbstractDatabaseProviderConnection::TableProperty > | tables (const QString &schema=QString(), const QgsAbstractDatabaseProviderConnection::TableFlags &flags=QgsAbstractDatabaseProviderConnection::TableFlags(), QgsFeedback *feedback=nullptr) const |
Returns information on the tables in the given schema. | |
QList< QgsAbstractDatabaseProviderConnection::TableProperty > | tablesInt (const QString &schema=QString(), const int flags=0) const |
Returns information on the tables in the given schema. | |
virtual QString | tableUri (const QString &schema, const QString &name) const |
Returns the URI string for the given table and schema. | |
virtual void | updateRelationship (const QgsWeakRelation &relationship) const |
Updates an existing relationship in the database. | |
virtual void | vacuum (const QString &schema, const QString &name) const |
Vacuum the database table with given schema and name (schema is ignored if not supported by the backend). | |
Public Member Functions inherited from QgsAbstractProviderConnection | |
QgsAbstractProviderConnection (const QString &name) | |
Creates a new connection with name by reading its configuration from the settings. | |
QgsAbstractProviderConnection (const QString &uri, const QVariantMap &configuration) | |
Creates a new connection from the given uri and configuration. | |
virtual | ~QgsAbstractProviderConnection ()=default |
QVariantMap | configuration () const |
Returns the connection configuration parameters. | |
virtual QIcon | icon () const |
Returns an icon representing the connection. | |
virtual void | remove (const QString &name) const =0 |
Deletes the connection from the settings. | |
void | setConfiguration (const QVariantMap &configuration) |
Sets the connection configuration. | |
void | setUri (const QString &uri) |
Sets the connection data source URI to uri. | |
virtual void | store (const QString &name) const =0 |
Stores the connection in the settings. | |
QString | uri () const |
Returns the connection data source URI string representation. | |
The QgsAbstractDatabaseProviderConnection class provides common functionality for DB based connections.
This class performs low level DB operations without asking the user for confirmation or handling currently opened layers and the registry entries, it is responsibility of the client code to keep layers in sync. The class methods will throw exceptions in case the requested operation is not supported or cannot be performed without errors.
Definition at line 47 of file qgsabstractdatabaseproviderconnection.h.
typedef QFlags< Capability > QgsAbstractDatabaseProviderConnection::Capabilities |
Definition at line 519 of file qgsabstractdatabaseproviderconnection.h.
typedef QFlags< GeometryColumnCapability > QgsAbstractDatabaseProviderConnection::GeometryColumnCapabilities |
Definition at line 541 of file qgsabstractdatabaseproviderconnection.h.
typedef QFlags< TableFlag > QgsAbstractDatabaseProviderConnection::TableFlags |
Definition at line 72 of file qgsabstractdatabaseproviderconnection.h.
The Capability enum represents the operations supported by the connection.
Enumerator | |
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CreateVectorTable | Can CREATE a vector (or aspatial) table/layer. |
DropRasterTable | Can DROP a raster table/layer. |
DropVectorTable | Can DROP a vector (or aspatial) table/layer. |
RenameVectorTable | Can RENAME a vector (or aspatial) table/layer. |
RenameRasterTable | Can RENAME a raster table/layer. |
CreateSchema | Can CREATE a schema. |
DropSchema | Can DROP a schema. |
RenameSchema | Can RENAME a schema. |
ExecuteSql | Can execute raw SQL queries (without returning results) |
Vacuum | Can run vacuum. |
Tables | Can list tables. |
Schemas | Can list schemas (if not set, the connection does not support schemas) |
SqlLayers | Can create vector layers from SQL SELECT queries. |
TableExists | Can check if table exists. |
Spatial | The connection supports spatial tables. |
CreateSpatialIndex | The connection can create spatial indices. |
SpatialIndexExists | The connection can determine if a spatial index exists. |
DeleteSpatialIndex | The connection can delete spatial indices for tables. |
DeleteField | Can delete an existing field/column. |
DeleteFieldCascade | Can delete an existing field/column with cascade. |
AddField | Can add a new field/column. |
ListFieldDomains | Can return a list of field domain names via fieldDomainNames()
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RetrieveFieldDomain | Can retrieve field domain details from provider via fieldDomain()
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SetFieldDomain | Can set the domain for an existing field via setFieldDomainName()
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AddFieldDomain | Can add new field domains to the database via addFieldDomain()
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RenameField | Can rename existing fields via renameField()
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RetrieveRelationships | Can retrieve relationships from the database.
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AddRelationship | Can add new relationships to the database via addRelationship()
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UpdateRelationship | Can update existing relationships in the database via updateRelationship()
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DeleteRelationship | Can delete existing relationships from the database via deleteRelationship()
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Definition at line 485 of file qgsabstractdatabaseproviderconnection.h.
The GeometryColumnCapability enum represents the geometry column features supported by the connection.
Definition at line 527 of file qgsabstractdatabaseproviderconnection.h.
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Flags for table properties.
Flags can be useful for filtering the tables returned from tables().
Definition at line 60 of file qgsabstractdatabaseproviderconnection.h.
QgsAbstractDatabaseProviderConnection::QgsAbstractDatabaseProviderConnection | ( | const QString & | name | ) |
Creates a new connection with name by reading its configuration from the settings.
If a connection with this name cannot be found, an empty connection will be returned.
Definition at line 26 of file qgsabstractdatabaseproviderconnection.cpp.
QgsAbstractDatabaseProviderConnection::QgsAbstractDatabaseProviderConnection | ( | const QString & | uri, |
const QVariantMap & | configuration | ||
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Creates a new connection from the given uri and configuration.
The connection is not automatically stored in the settings.
Definition at line 32 of file qgsabstractdatabaseproviderconnection.cpp.
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Adds a field.
field | specification of the new field |
schema | name of the schema (schema is ignored if not supported by the backend). |
tableName | name of the table |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1216 of file qgsabstractdatabaseproviderconnection.cpp.
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Adds a new field domain to the database.
domain | field domain to add |
schema | name of the schema (schema is ignored if not supported by the backend). |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1370 of file qgsabstractdatabaseproviderconnection.cpp.
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Adds a new field relationship to the database.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1391 of file qgsabstractdatabaseproviderconnection.cpp.
QgsAbstractDatabaseProviderConnection::Capabilities QgsAbstractDatabaseProviderConnection::capabilities | ( | ) | const |
Returns connection capabilities.
Definition at line 38 of file qgsabstractdatabaseproviderconnection.cpp.
Qgis::DatabaseProviderConnectionCapabilities2 QgsAbstractDatabaseProviderConnection::capabilities2 | ( | ) | const |
Returns extended connection capabilities.
Definition at line 43 of file qgsabstractdatabaseproviderconnection.cpp.
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Creates a new schema with the specified name.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1136 of file qgsabstractdatabaseproviderconnection.cpp.
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Creates a spatial index for the database table with given schema and name (schema is ignored if not supported by the backend).
The options argument can be used to provide extra options controlling the spatial index creation.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1169 of file qgsabstractdatabaseproviderconnection.cpp.
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Creates and returns a (possibly invalid) vector layer based on the sql statement and optional options.
QgsProviderConnectionException | if any errors are encountered or if SQL layer creation is not supported. |
Definition at line 1174 of file qgsabstractdatabaseproviderconnection.cpp.
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Creates an empty table with name in the given schema (schema is ignored if not supported by the backend).
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1066 of file qgsabstractdatabaseproviderconnection.cpp.
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Deletes the field with the specified name.
fieldName | name of the field to be deleted |
schema | name of the schema (schema is ignored if not supported by the backend). |
tableName | name of the table |
force | if true , a DROP CASCADE will drop all related objects |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1191 of file qgsabstractdatabaseproviderconnection.cpp.
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Deletes an existing relationship in the database.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1401 of file qgsabstractdatabaseproviderconnection.cpp.
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Deletes the existing spatial index for the database table with given schema, name and geometryColumn (schema and geometryColumn are ignored if not supported by the backend).
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1180 of file qgsabstractdatabaseproviderconnection.cpp.
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Drops a raster table with given schema (schema is ignored if not supported by the backend) and name.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1131 of file qgsabstractdatabaseproviderconnection.cpp.
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Drops an entire schema with the specified name.
name | name of the schema to be dropped |
force | if true , a DROP CASCADE will drop all related objects |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1141 of file qgsabstractdatabaseproviderconnection.cpp.
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Drops a vector (or aspatial) table with given schema (schema is ignored if not supported by the backend) and name.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1102 of file qgsabstractdatabaseproviderconnection.cpp.
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Executes raw sql and returns the (possibly empty) query results, optionally feedback can be provided.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1157 of file qgsabstractdatabaseproviderconnection.cpp.
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Executes raw sql and returns the (possibly empty) list of results in a multi-dimensional array, optionally feedback can be provided.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1151 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns the field domain with the specified name from the provider.
The caller takes ownership of the return object. Will return nullptr
if no matching field domain is found.
This is supported on providers with the Capability::RetrieveFieldDomain capability only.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1359 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a list of field domain names present on the provider.
This is supported on providers with the Capability::ListFieldDomains capability only.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1353 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns the fields of a table and schema.
Since QGIS 3.32 the optional feedback argument can be used to cancel the request.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1337 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns connection geometry column capabilities (Z, M, SinglePart, Curves).
Definition at line 48 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a list of field names which are considered illegal by the connection and should not be used when creating or altering fields.
Definition at line 1031 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a list of native types supported by the connection.
QgsProviderConnectionException | if any errors are encountered. |
QString QgsAbstractDatabaseProviderConnection::providerKey | ( | ) | const |
Returns the provider key.
Definition at line 88 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a SQL query builder for the connection, which provides an interface for provider-specific creation of SQL queries.
The caller takes ownership of the returned object.
Definition at line 1061 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a list of the related table types supported by the database format.
The related table type is a free-form string representing the type of related features, where the exact interpretation is format dependent. For instance, table types from GeoPackage relationships will directly reflect the categories from the GeoPackage related tables extension (i.e. "media", "simple attributes", "features", "attributes" and "tiles").
Definition at line 1056 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a list of relationships detected in the database.
This is supported on providers with the Capability::RetrieveRelationships capability only.
If a schema and/or tableName are specified, then only relationships where the specified table forms the left (or "parent" / "referenced") side of the relationship are retrieved.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1385 of file qgsabstractdatabaseproviderconnection.cpp.
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Renames an existing field.
schema | name of the schema (schema is ignored if not supported by the backend). |
tableName | name of the table |
name | current name of field |
newName | new name for field |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1241 of file qgsabstractdatabaseproviderconnection.cpp.
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Renames a raster table with given schema (schema is ignored if not supported by the backend) and name.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1097 of file qgsabstractdatabaseproviderconnection.cpp.
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Renames a schema with the specified name.
Raises a QgsProviderConnectionException if any errors are encountered.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1146 of file qgsabstractdatabaseproviderconnection.cpp.
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Renames a vector or aspatial table with given schema (schema is ignored if not supported by the backend) and name.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1085 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns information about the existing schemas.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1301 of file qgsabstractdatabaseproviderconnection.cpp.
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Search the stored layer metadata in the connection, optionally limiting the search to the metadata identifier, title, abstract, keywords and categories.
searchContext context for the search searchString limit the search to metadata having an extent intersecting geographicExtent, an optional feedback can be used to monitor and control the search process.
The default implementation raises a QgsNotSupportedException, data providers may implement the search functionality.
A QgsProviderConnectionException is raised in case of errors happening during the search for providers that implement the search functionality.
Definition at line 1122 of file qgsabstractdatabaseproviderconnection.cpp.
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Sets the alias for the existing field with the specified name.
fieldName | name of the field to be modified |
schema | name of the schema (schema is ignored if not supported by the backend). |
tableName | name of the table |
alias | alias to set for the field. Set to an empty string to remove a previously set alias. |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1375 of file qgsabstractdatabaseproviderconnection.cpp.
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Sets the comment for the existing field with the specified name.
fieldName | name of the field to be modified |
schema | name of the schema (schema is ignored if not supported by the backend). |
tableName | name of the table |
comment | comment to set for the field. Set to an empty string to remove a previously set comment. |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1380 of file qgsabstractdatabaseproviderconnection.cpp.
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Sets the field domain name for the existing field with the specified name.
fieldName | name of the field to be modified |
schema | name of the schema (schema is ignored if not supported by the backend). |
tableName | name of the table |
domainName | name of the domain to set for the field. Must be an existing field domain (see fieldDomainNames()). Set to an empty string to remove a previously set domain. |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1365 of file qgsabstractdatabaseproviderconnection.cpp.
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Determines whether a spatial index exists for the database table with given schema, name and geometryColumn (schema and geometryColumn are ignored if not supported by the backend).
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1185 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a dictionary of SQL keywords supported by the provider.
The default implementation returns an list of common reserved words under the "Keyword" and "Constant" categories.
Subclasses should add provider- and/or connection- specific words.
Definition at line 93 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns SQL layer definition capabilities (Filters, GeometryColumn, PrimaryKeys).
Definition at line 53 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns the SQL layer options from a layerSource.
QgsProviderConnectionException | if any errors are encountered or if SQL layer creation is not supported. |
Definition at line 1091 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a list of field domain types which are supported by the provider.
Definition at line 1036 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns the relationship capabilities supported by the provider.
Definition at line 1051 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a list of relationship cardinalities which are supported by the provider.
Definition at line 1041 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns a list of relationship strengths which are supported by the provider.
Definition at line 1046 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns information on a table in the given schema.
Since QGIS 3.32 the optional feedback argument can be used to cancel the request.
QgsProviderConnectionException | if any errors are encountered or if the table does not exist. |
Definition at line 1280 of file qgsabstractdatabaseproviderconnection.cpp.
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Checks whether a table name exists in the given schema.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1107 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns information on the tables in the given schema.
schema | name of the schema (ignored if not supported by the backend) |
flags | filter tables by flags, this option completely overrides search options stored in the connection |
feedback | can be used to cancel the request (since QGIS 3.32) |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1273 of file qgsabstractdatabaseproviderconnection.cpp.
QList< QgsAbstractDatabaseProviderConnection::TableProperty > QgsAbstractDatabaseProviderConnection::tablesInt | ( | const QString & | schema = QString() , |
const int | flags = 0 |
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) | const |
Returns information on the tables in the given schema.
schema | name of the schema (ignored if not supported by the backend) |
flags | filter tables by flags, this option completely overrides search options stored in the connection |
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1295 of file qgsabstractdatabaseproviderconnection.cpp.
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Returns the URI string for the given table and schema.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 59 of file qgsabstractdatabaseproviderconnection.cpp.
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Updates an existing relationship in the database.
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1396 of file qgsabstractdatabaseproviderconnection.cpp.
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Vacuum the database table with given schema and name (schema is ignored if not supported by the backend).
QgsProviderConnectionException | if any errors are encountered. |
Definition at line 1164 of file qgsabstractdatabaseproviderconnection.cpp.
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Definition at line 1148 of file qgsabstractdatabaseproviderconnection.h.
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Definition at line 1149 of file qgsabstractdatabaseproviderconnection.h.
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Definition at line 1151 of file qgsabstractdatabaseproviderconnection.h.
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Definition at line 1154 of file qgsabstractdatabaseproviderconnection.h.
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Definition at line 1153 of file qgsabstractdatabaseproviderconnection.h.
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Definition at line 1152 of file qgsabstractdatabaseproviderconnection.h.