mysqlx.SelectStatement

class mysqlx.SelectStatement(table: DatabaseObject, *fields: str)

Bases: ReadStatement

A statement for record retrieval operations on a Table.

Parameters:

• table (mysqlx.Table) – The Table object.

• *fields – The fields to be retrieved.

bind(*args: Any) → FilterableStatement

Binds value(s) to a specific placeholder(s).

Parameters:

*args – The name of the placeholder and the value to bind. A mysqlx.DbDoc object or a JSON string representation can be used.

Returns:

FilterableStatement object.

Return type:

mysqlx.FilterableStatement

Raises:

ProgrammingError – If the number of arguments is invalid.

property changed: bool

True if this statement has changes.

Type:

bool

property deallocate_prepare_execute: bool

True to deallocate + prepare + execute statement.

Type:

bool

property exec_counter: int

The number of times this statement was executed.

Type:

int

execute() → DocResult | RowResult

Execute the statement.

Returns:

Result object.

Return type:

mysqlx.Result

get_binding_map() → Dict[str, Any]

Returns the binding map dictionary.

Returns:

The binding map dictionary.

Return type:

dict

get_bindings() → Dict[str, Any] | List

Returns the bindings list.

Returns:

The bindings list.

Return type:

list

get_grouping() → List[ProtoMessage | Dict[str, Any]]

Returns the grouping expression list.

Returns:

The grouping expression list.

Return type:

list

get_having() → XdevMessage

Returns the having expression.

Returns:

The having expression.

Return type:

object

get_limit_offset() → int

Returns the limit offset.

Returns:

The limit offset.

Return type:

int

get_limit_row_count() → int

Returns the limit row count.

Returns:

The limit row count.

Return type:

int

get_projection_expr() → List[ProtoMessage | Dict[str, Any]]

Returns the projection expression.

Returns:

The projection expression.

Return type:

object

get_sort_expr() → List[ProtoMessage | Dict[str, Any]]

Returns the sort expression.

Returns:

The sort expression.

Return type:

object

get_sql() → str

Returns the generated SQL.

Returns:

The generated SQL.

Return type:

str

get_where_expr() → XdevMessage

Returns the where expression.

Returns:

The where expression.

Return type:

object

group_by(*fields: str) → ReadStatement

Sets a grouping criteria for the resultset.

Parameters:

*fields – The string expressions identifying the grouping criteria.

Returns:

ReadStatement object.

Return type:

mysqlx.ReadStatement

having(condition: str) → ReadStatement

Sets a condition for records to be considered in agregate function operations.

Parameters:

condition (string) – A condition on the agregate functions used on the grouping criteria.

Returns:

ReadStatement object.

Return type:

mysqlx.ReadStatement

increment_exec_counter() → None

Increments the number of times this statement has been executed.

is_doc_based() → bool

Check if it is document based.

Returns:

True if it is document based.

Return type:

bool

is_lock_exclusive() → bool

Returns True if is EXCLUSIVE LOCK.

Returns:

True if is EXCLUSIVE LOCK.

Return type:

bool

is_lock_shared() → bool

Returns True if is SHARED LOCK.

Returns:

True if is SHARED LOCK.

Return type:

bool

limit(row_count: int, offset: int | None = None) → FilterableStatement

Sets the maximum number of items to be returned.

Parameters:

row_count (int) – The maximum number of items.

Returns:

FilterableStatement object.

Return type:

mysqlx.FilterableStatement

Raises:

ValueError – If row_count is not a positive integer.

Changed in version 8.0.12: The usage of offset was deprecated.

property lock_contention: LockContention

The lock contention value.

Type:

mysqlx.LockContention

lock_exclusive(lock_contention: LockContention = LockContention.DEFAULT) → ReadStatement

Execute a read operation with EXCLUSIVE LOCK. Only one lock can be

active at a time.

Parameters:

lock_contention (mysqlx.LockContention) – Lock contention.

lock_shared(lock_contention: LockContention = LockContention.DEFAULT) → ReadStatement

Execute a read operation with SHARED LOCK. Only one lock can be

active at a time.

Parameters:

lock_contention (mysqlx.LockContention) – Lock contention.

offset(offset: int) → FilterableStatement

Sets the number of items to skip.

Parameters:

offset (int) – The number of items to skip.

Returns:

FilterableStatement object.

Return type:

mysqlx.FilterableStatement

Raises:

ValueError – If offset is not a positive integer.

New in version 8.0.12.

order_by(*clauses: str) → SelectStatement

Sets the order by criteria.

Parameters:

*clauses – The expression strings defining the order by criteria.

Returns:

SelectStatement object.

Return type:

mysqlx.SelectStatement

property prepared: bool

True if this statement has been prepared.

Type:

bool

property repeated: bool

True if this statement was executed more than once.

Type:

bool

reset_exec_counter() → None

Resets the number of times this statement has been executed.

property schema: Schema

The Schema object.

Type:

mysqlx.Schema

sort(*clauses: str) → FilterableStatement

Sets the sorting criteria.

Parameters:

*clauses – The expression strings defining the sort criteria.

Returns:

FilterableStatement object.

Return type:

mysqlx.FilterableStatement

Deprecated since version 8.0.12.

property stmt_id: int

Returns this statement ID.

Returns:

The statement ID.

Return type:

int

property target: DatabaseObject

The database object target.

Type:

object

where(condition: str) → SelectStatement

Sets the search condition to filter.

Parameters:

condition (str) – Sets the search condition to filter records.

Returns:

SelectStatement object.

Return type:

mysqlx.SelectStatement