mysqlx.SelectStatement

class mysqlx.SelectStatement(table, *fields)

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)

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

True if this statement has changes.

Type:

bool

property deallocate_prepare_execute

True to deallocate + prepare + execute statement.

Type:

bool

property exec_counter

The number of times this statement was executed.

Type:

int

execute()

Execute the statement.

Returns:

Result object.

Return type:

mysqlx.Result

get_binding_map()

Returns the binding map dictionary.

Returns:

The binding map dictionary.

Return type:

dict

get_bindings()

Returns the bindings list.

Returns:

The bindings list.

Return type:

list

get_grouping()

Returns the grouping expression list.

Returns:

The grouping expression list.

Return type:

list

get_having()

Returns the having expression.

Returns:

The having expression.

Return type:

object

get_limit_offset()

Returns the limit offset.

Returns:

The limit offset.

Return type:

int

get_limit_row_count()

Returns the limit row count.

Returns:

The limit row count.

Return type:

int

get_projection_expr()

Returns the projection expression.

Returns:

The projection expression.

Return type:

object

get_sort_expr()

Returns the sort expression.

Returns:

The sort expression.

Return type:

object

get_sql()

Returns the generated SQL.

Returns:

The generated SQL.

Return type:

str

get_where_expr()

Returns the where expression.

Returns:

The where expression.

Return type:

object

group_by(*fields)

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)

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()

Increments the number of times this statement has been executed.

is_doc_based()

Check if it is document based.

Returns:

True if it is document based.

Return type:

bool

is_lock_exclusive()

Returns True if is EXCLUSIVE LOCK.

Returns:

True if is EXCLUSIVE LOCK.

Return type:

bool

is_lock_shared()

Returns True if is SHARED LOCK.

Returns:

True if is SHARED LOCK.

Return type:

bool

limit(row_count, offset=None)

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

The lock contention value.

Type:

mysqlx.LockContention

lock_exclusive(lock_contention=LockContention.DEFAULT)

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.DEFAULT)

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)

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)

Sets the order by criteria.

Parameters:

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

Returns:

SelectStatement object.

Return type:

mysqlx.SelectStatement

property prepared

True if this statement has been prepared.

Type:

bool

property repeated

True if this statement was executed more than once.

Type:

bool

reset_exec_counter()

Resets the number of times this statement has been executed.

property schema

The Schema object.

Type:

mysqlx.Schema

sort(*clauses)

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

Returns this statement ID.

Returns:

The statement ID.

Return type:

int

property target

The database object target.

Type:

object

where(condition)

Sets the search condition to filter.

Parameters:

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

Returns:

SelectStatement object.

Return type:

mysqlx.SelectStatement