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![]() This patch adds support for SYS_REFCURSOR (a weakly typed cursor) for both sql_mode=ORACLE and sql_mode=DEFAULT. Works as a regular stored routine variable, parameter and return value: - can be passed as an IN parameter to stored functions and procedures - can be passed as an INOUT and OUT parameter to stored procedures - can be returned from a stored function Note, strongly typed REF CURSOR will be added separately. Note, to maintain dependencies easier, some parts of sql_class.h and item.h were moved to new header files: - select_results.h: class select_result_sink class select_result class select_result_interceptor - sp_cursor.h: class sp_cursor_statistics class sp_cursor - sp_rcontext_handler.h class Sp_rcontext_handler and its descendants The implementation consists of the following parts: - A new class sp_cursor_array deriving from Dynamic_array - A new class Statement_rcontext which contains data shared between sub-statements of a compound statement. It has a member m_statement_cursors of the sp_cursor_array data type, as well as open cursor counter. THD inherits from Statement_rcontext. - A new data type handler Type_handler_sys_refcursor in plugins/type_cursor/ It is designed to store uint16 references - positions of the cursor in THD::m_statement_cursors. - Type_handler_sys_refcursor suppresses some derived numeric features. When a SYS_REFCURSOR variable is used as an integer an error is raised. - A new abstract class sp_instr_fetch_cursor. It's needed to share the common code between "OPEN cur" (for static cursors) and "OPER cur FOR stmt" (for SYS_REFCURSORs). - New sp_instr classes: * sp_instr_copen_by_ref - OPEN sys_ref_curor FOR stmt; * sp_instr_cfetch_by_ref - FETCH sys_ref_cursor INTO targets; * sp_instr_cclose_by_ref - CLOSE sys_ref_cursor; * sp_instr_destruct_variable - to destruct SYS_REFCURSOR variables when the execution goes out of the BEGIN..END block where SYS_REFCURSOR variables are declared. - New methods in LEX: * sp_open_cursor_for_stmt - handles "OPEN sys_ref_cursor FOR stmt". * sp_add_instr_fetch_cursor - "FETCH cur INTO targets" for both static cursors and SYS_REFCURSORs. * sp_close - handles "CLOSE cur" both for static cursors and SYS_REFCURSORs. - Changes in cursor functions to handle both static cursors and SYS_REFCURSORs: * Item_func_cursor_isopen * Item_func_cursor_found * Item_func_cursor_notfound * Item_func_cursor_rowcount - A new system variable @@max_open_cursors - to limit the number of cursors (static and SYS_REFCURSORs) opened at the same time. Its allowed range is [0-65536], with 50 by default. - A new virtual method Type_handler::can_return_bool() telling if calling item->val_bool() is allowed for Items of this data type, or if otherwise the "Illegal parameter for operation" error should be raised at fix_fields() time. - New methods in Sp_rcontext_handler: * get_cursor() * get_cursor_by_ref() - A new class Sp_rcontext_handler_statement to handle top level statement wide cursors which are shared by all substatements. - A new virtual method expr_event_handler() in classes Item and Field. It's needed to close (and make available for a new OPEN) unused THD::m_statement_cursors elements which do not have any references any more. It can happen in various moments in time, e.g. * after evaluation parameters of an SQL routine * after assigning a cursor expression into a SYS_REFCURSOR variable * when leaving a BEGIN..END block with SYS_REFCURSOR variables * after setting OUT/INOUT routine actual parameters from formal parameters. |
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anonymous_derived.result | ||
binlog_ptr_mysqlbinlog.result | ||
binlog_stm_ps.result | ||
binlog_stm_sp.result | ||
binlog_stm_sp_package.result | ||
column_compression.result | ||
custom_aggregate_functions.result | ||
empty_string_literal.result | ||
events.result | ||
exception.result | ||
func_add_months.result | ||
func_case.result | ||
func_concat.result | ||
func_decode.result | ||
func_length.result | ||
func_misc.result | ||
func_pad.result | ||
func_qualified.result | ||
func_regexp_replace.result | ||
func_replace.result | ||
func_substr.result | ||
func_time.result | ||
func_to_char.result | ||
func_trim.result | ||
gis-debug.result | ||
gis.result | ||
information_schema_parameters.result | ||
keywords.result | ||
lower_case_table_names.result | ||
minus.result | ||
misc.result | ||
mysqldump_restore.result | ||
mysqldump_restore_func_qualified.result | ||
parser.result | ||
plugin.result | ||
ps.result | ||
rpl_mariadb_date.result | ||
rpl_sp_package.result | ||
rpl_sp_package_variables.result | ||
sequence.result | ||
sp-anchor-row-type-table.result | ||
sp-anchor-type.result | ||
sp-anonymous.result | ||
sp-code.result | ||
sp-cursor-decl.result | ||
sp-cursor-rowtype.result | ||
sp-cursor.result | ||
sp-default-param.result | ||
sp-expr.result | ||
sp-goto-debug.result | ||
sp-goto.result | ||
sp-inout.result | ||
sp-memory-leak.result | ||
sp-package-code.result | ||
sp-package-concurrent-dml-db.result | ||
sp-package-concurrent-dml-package.result | ||
sp-package-concurrent-dml-trigger.result | ||
sp-package-concurrent-dml-view.result | ||
sp-package-i_s.result | ||
sp-package-innodb.result | ||
sp-package-mdl.result | ||
sp-package-mysqldump.result | ||
sp-package-security.result | ||
sp-package.result | ||
sp-param.result | ||
sp-record.result | ||
sp-row.result | ||
sp-security.result | ||
sp-sys_refcursor-alias.result | ||
sp-sys_refcursor-func_hybrid.result | ||
sp-sys_refcursor.result | ||
sp.result | ||
statement-expr.result | ||
table_value_constr.result | ||
trigger.result | ||
truncate.result | ||
type_blob.result | ||
type_clob.result | ||
type_date.result | ||
type_number.result | ||
type_raw.result | ||
type_varchar.result | ||
type_varchar2.result | ||
update.result | ||
update_innodb.result | ||
variables.result | ||
vcol.result | ||
vcol_innodb.result | ||
versioning.result | ||
win.result |