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| # Query: | |
| EXPLAIN SELECT paragraphs_item.revision_id AS revision_id, paragraphs_item.id AS id | |
| FROM paragraphs_item | |
| INNER JOIN paragraphs_item_field_data paragraphs_item_field_data ON paragraphs_item_field_data.id = paragraphs_item.id | |
| WHERE (paragraphs_item_field_data.type IN ('carousel', 'latest_content_section', 'logo_callout', 'multiple_promo', 'people_promo', 'related_content_section', 'rich_text_block', 'vertical_content_listing', 'video')) AND (paragraphs_item_field_data.id IN ('483614', '76841')); | |
| QUERY RESULTS: | |
| On MariaDB 10.0 environments (query takes only milliseconds): | |
| +------+-------------+----------------------------+--------+------------------------------------------------------------------------------------+---------+---------+----------------------------------------+------+-------------+ | |
| | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | | |
| +------+-------------+----------------------------+--------+------------------------------------------------------------------------------------+---------+---------+----------------------------------------+------+-------------+ | |
| | 1 | SIMPLE | paragraphs_item_field_data | range | PRIMARY,paragraph_field__type__target_id,paragraph__id__default_langcode__langcode | PRIMARY | 4 | NULL | 2 | Using where | | |
| | 1 | SIMPLE | paragraphs_item | eq_ref | PRIMARY | PRIMARY | 4 | pantheon.paragraphs_item_field_data.id | 1 | | | |
| +------+-------------+----------------------------+--------+------------------------------------------------------------------------------------+---------+---------+----------------------------------------+------+-------------+ | |
| 2 rows in set (0.02 sec) | |
| On MariaDB 10.4 environments (also query takes a very long time, minutes): | |
| +------+-------------+----------------------------+-------+------------------------------------------------------------------------------------+------------------------+---------+-----------------------------+----------+-------------+ | |
| | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | | |
| +------+-------------+----------------------------+-------+------------------------------------------------------------------------------------+------------------------+---------+-----------------------------+----------+-------------+ | |
| | 1 | SIMPLE | paragraphs_item | index | PRIMARY | paragraph__revision_id | 5 | NULL | 11950050 | Using index | | |
| | 1 | SIMPLE | paragraphs_item_field_data | ref | PRIMARY,paragraph_field__type__target_id,paragraph__id__default_langcode__langcode | PRIMARY | 4 | pantheon.paragraphs_item.id | 1 | Using where | | |
| +------+-------------+----------------------------+-------+------------------------------------------------------------------------------------+------------------------+---------+-----------------------------+----------+-------------+ | |
| 2 rows in set (0.03 sec) |
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| { | |
| "steps": [ | |
| { | |
| "join_preparation": { | |
| "select_id": 1, | |
| "steps": [ | |
| { | |
| "expanded_query": "select paragraphs_item.revision_id AS revision_id,paragraphs_item.`id` AS `id` from (paragraphs_item join paragraphs_item_field_data on(paragraphs_item_field_data.`id` = paragraphs_item.`id`)) where paragraphs_item_field_data.`type` in ('carousel','latest_content_section','logo_callout','multiple_promo','people_promo','related_content_section','rich_text_block','vertical_content_listing','video') and paragraphs_item_field_data.`id` in ('483614','76841')" | |
| } | |
| ] | |
| } | |
| }, | |
| { | |
| "join_optimization": { | |
| "select_id": 1, | |
| "steps": [ | |
| { | |
| "condition_processing": { | |
| "condition": "WHERE", | |
| "original_condition": "paragraphs_item_field_data.`type` in ('carousel','latest_content_section','logo_callout','multiple_promo','people_promo','related_content_section','rich_text_block','vertical_content_listing','video') and paragraphs_item_field_data.`id` in ('483614','76841') and paragraphs_item_field_data.`id` = paragraphs_item.`id`", | |
| "steps": [ | |
| { | |
| "transformation": "equality_propagation", | |
| "resulting_condition": "paragraphs_item_field_data.`type` in ('carousel','latest_content_section','logo_callout','multiple_promo','people_promo','related_content_section','rich_text_block','vertical_content_listing','video') and paragraphs_item_field_data.`id` in ('483614','76841') and multiple equal(paragraphs_item_field_data.`id`, paragraphs_item.`id`)" | |
| }, | |
| { | |
| "transformation": "constant_propagation", | |
| "resulting_condition": "paragraphs_item_field_data.`type` in ('carousel','latest_content_section','logo_callout','multiple_promo','people_promo','related_content_section','rich_text_block','vertical_content_listing','video') and paragraphs_item_field_data.`id` in ('483614','76841') and multiple equal(paragraphs_item_field_data.`id`, paragraphs_item.`id`)" | |
| }, | |
| { | |
| "transformation": "trivial_condition_removal", | |
| "resulting_condition": "paragraphs_item_field_data.`type` in ('carousel','latest_content_section','logo_callout','multiple_promo','people_promo','related_content_section','rich_text_block','vertical_content_listing','video') and paragraphs_item_field_data.`id` in ('483614','76841') and multiple equal(paragraphs_item_field_data.`id`, paragraphs_item.`id`)" | |
| } | |
| ] | |
| } | |
| }, | |
| { | |
| "table_dependencies": [ | |
| { | |
| "table": "paragraphs_item", | |
| "row_may_be_null": false, | |
| "map_bit": 0, | |
| "depends_on_map_bits": [] | |
| }, | |
| { | |
| "table": "paragraphs_item_field_data", | |
| "row_may_be_null": false, | |
| "map_bit": 1, | |
| "depends_on_map_bits": [] | |
| } | |
| ] | |
| }, | |
| { | |
| "ref_optimizer_key_uses": [ | |
| { | |
| "table": "paragraphs_item", | |
| "field": "id", | |
| "equals": "paragraphs_item_field_data.`id`", | |
| "null_rejecting": false | |
| }, | |
| { | |
| "table": "paragraphs_item_field_data", | |
| "field": "id", | |
| "equals": "paragraphs_item.`id`", | |
| "null_rejecting": false | |
| }, | |
| { | |
| "table": "paragraphs_item_field_data", | |
| "field": "id", | |
| "equals": "paragraphs_item.`id`", | |
| "null_rejecting": false | |
| } | |
| ] | |
| }, | |
| { | |
| "rows_estimation": [ | |
| { | |
| "table": "paragraphs_item", | |
| "table_scan": { | |
| "rows": 11558639, | |
| "cost": 63296 | |
| } | |
| }, | |
| { | |
| "table": "paragraphs_item_field_data", | |
| "range_analysis": { | |
| "table_scan": { | |
| "rows": 11867358, | |
| "cost": 2.45e6 | |
| }, | |
| "potential_range_indexes": [ | |
| { | |
| "index": "PRIMARY", | |
| "usable": true, | |
| "key_parts": ["id", "langcode"] | |
| }, | |
| { | |
| "index": "paragraph_field__type__target_id", | |
| "usable": true, | |
| "key_parts": ["type", "id", "langcode"] | |
| }, | |
| { | |
| "index": "paragraph__id__default_langcode__langcode", | |
| "usable": true, | |
| "key_parts": ["id", "default_langcode", "langcode"] | |
| }, | |
| { | |
| "index": "paragraph__revision_id", | |
| "usable": false, | |
| "cause": "not applicable" | |
| }, | |
| { | |
| "index": "paragraph__status_type", | |
| "usable": false, | |
| "cause": "not applicable" | |
| }, | |
| { | |
| "index": "paragraphs__parent_fields", | |
| "usable": false, | |
| "cause": "not applicable" | |
| } | |
| ], | |
| "best_covering_index_scan": { | |
| "index": "paragraph_field__type__target_id", | |
| "cost": 679265, | |
| "chosen": true | |
| }, | |
| "setup_range_conditions": [], | |
| "group_index_range": { | |
| "chosen": false, | |
| "cause": "not single_table" | |
| }, | |
| "analyzing_range_alternatives": { | |
| "range_scan_alternatives": [ | |
| { | |
| "index": "PRIMARY", | |
| "ranges": [ | |
| "(76841) <= (id) <= (76841)", | |
| "(483614) <= (id) <= (483614)" | |
| ], | |
| "rowid_ordered": true, | |
| "using_mrr": false, | |
| "index_only": false, | |
| "rows": 2, | |
| "cost": 2.4125, | |
| "chosen": true | |
| }, | |
| { | |
| "index": "paragraph_field__type__target_id", | |
| "ranges": [ | |
| "(carousel,76841) <= (type,id) <= (carousel,76841)", | |
| "(carousel,483614) <= (type,id) <= (carousel,483614)", | |
| "(latest_content_section,76841) <= (type,id) <= (latest_content_section,76841)", | |
| "(latest_content_section,483614) <= (type,id) <= (latest_content_section,483614)", | |
| "(logo_callout,76841) <= (type,id) <= (logo_callout,76841)", | |
| "(logo_callout,483614) <= (type,id) <= (logo_callout,483614)", | |
| "(multiple_promo,76841) <= (type,id) <= (multiple_promo,76841)", | |
| "(multiple_promo,483614) <= (type,id) <= (multiple_promo,483614)", | |
| "(people_promo,76841) <= (type,id) <= (people_promo,76841)", | |
| "(people_promo,483614) <= (type,id) <= (people_promo,483614)", | |
| "(related_content_section,76841) <= (type,id) <= (related_content_section,76841)", | |
| "(related_content_section,483614) <= (type,id) <= (related_content_section,483614)", | |
| "(rich_text_block,76841) <= (type,id) <= (rich_text_block,76841)", | |
| "(rich_text_block,483614) <= (type,id) <= (rich_text_block,483614)", | |
| "(vertical_content_listing,76841) <= (type,id) <= (vertical_content_listing,76841)", | |
| "(vertical_content_listing,483614) <= (type,id) <= (vertical_content_listing,483614)", | |
| "(video,76841) <= (type,id) <= (video,76841)", | |
| "(video,483614) <= (type,id) <= (video,483614)" | |
| ], | |
| "rowid_ordered": false, | |
| "using_mrr": false, | |
| "index_only": true, | |
| "rows": 18, | |
| "cost": 21.162, | |
| "chosen": false, | |
| "cause": "cost" | |
| }, | |
| { | |
| "index": "paragraph__id__default_langcode__langcode", | |
| "ranges": [ | |
| "(76841) <= (id) <= (76841)", | |
| "(483614) <= (id) <= (483614)" | |
| ], | |
| "rowid_ordered": false, | |
| "using_mrr": false, | |
| "index_only": false, | |
| "rows": 2, | |
| "cost": 4.7509, | |
| "chosen": false, | |
| "cause": "cost" | |
| } | |
| ], | |
| "analyzing_roworder_intersect": { | |
| "cause": "too few roworder scans" | |
| }, | |
| "analyzing_index_merge_union": [] | |
| }, | |
| "chosen_range_access_summary": { | |
| "range_access_plan": { | |
| "type": "range_scan", | |
| "index": "PRIMARY", | |
| "rows": 2, | |
| "ranges": [ | |
| "(76841) <= (id) <= (76841)", | |
| "(483614) <= (id) <= (483614)" | |
| ] | |
| }, | |
| "rows_for_plan": 2, | |
| "cost_for_plan": 2.4125, | |
| "chosen": true | |
| } | |
| } | |
| }, | |
| { | |
| "table": "paragraphs_item_field_data", | |
| "rowid_filters": [ | |
| { | |
| "key": "paragraph__id__default_langcode__langcode", | |
| "build_cost": 2.3748, | |
| "rows": 2 | |
| }, | |
| { | |
| "key": "paragraph_field__type__target_id", | |
| "build_cost": 21.772, | |
| "rows": 18 | |
| } | |
| ] | |
| }, | |
| { | |
| "selectivity_for_indexes": [ | |
| { | |
| "index_name": "paragraph_field__type__target_id", | |
| "selectivity_from_index": 1.5e-6 | |
| } | |
| ], | |
| "selectivity_for_columns": [], | |
| "cond_selectivity": 1.5e-6 | |
| } | |
| ] | |
| }, | |
| { | |
| "considered_execution_plans": [ | |
| { | |
| "plan_prefix": [], | |
| "table": "paragraphs_item_field_data", | |
| "best_access_path": { | |
| "considered_access_paths": [ | |
| { | |
| "access_type": "range", | |
| "resulting_rows": 18, | |
| "cost": 2e308, | |
| "chosen": true | |
| } | |
| ], | |
| "chosen_access_method": { | |
| "type": "range", | |
| "records": 18, | |
| "cost": 2e308, | |
| "uses_join_buffering": false | |
| } | |
| }, | |
| "rows_for_plan": 18, | |
| "cost_for_plan": 2e308, | |
| "rest_of_plan": [ | |
| { | |
| "plan_prefix": ["paragraphs_item_field_data"], | |
| "table": "paragraphs_item", | |
| "best_access_path": { | |
| "considered_access_paths": [ | |
| { | |
| "access_type": "eq_ref", | |
| "index": "PRIMARY", | |
| "rows": 1, | |
| "cost": 18, | |
| "chosen": true | |
| }, | |
| { | |
| "type": "scan", | |
| "chosen": false, | |
| "cause": "cost" | |
| } | |
| ], | |
| "chosen_access_method": { | |
| "type": "eq_ref", | |
| "records": 1, | |
| "cost": 18, | |
| "uses_join_buffering": false | |
| } | |
| }, | |
| "rows_for_plan": 18, | |
| "cost_for_plan": 2e308, | |
| "estimated_join_cardinality": 18 | |
| } | |
| ] | |
| }, | |
| { | |
| "plan_prefix": [], | |
| "table": "paragraphs_item", | |
| "best_access_path": { | |
| "considered_access_paths": [ | |
| { | |
| "access_type": "scan", | |
| "resulting_rows": 1.16e7, | |
| "cost": 63296, | |
| "chosen": true | |
| } | |
| ], | |
| "chosen_access_method": { | |
| "type": "scan", | |
| "records": 1.16e7, | |
| "cost": 63296, | |
| "uses_join_buffering": false | |
| } | |
| }, | |
| "rows_for_plan": 1.16e7, | |
| "cost_for_plan": 2.38e6, | |
| "rest_of_plan": [ | |
| { | |
| "plan_prefix": ["paragraphs_item"], | |
| "table": "paragraphs_item_field_data", | |
| "best_access_path": { | |
| "considered_access_paths": [ | |
| { | |
| "access_type": "ref", | |
| "index": "PRIMARY", | |
| "rows": 1, | |
| "cost": 1.16e7, | |
| "chosen": true | |
| }, | |
| { | |
| "access_type": "ref", | |
| "index": "paragraph__id__default_langcode__langcode", | |
| "rowid_filter_key": "paragraph_field__type__target_id", | |
| "rows": 1, | |
| "cost": 1.19e7, | |
| "chosen": false, | |
| "cause": "cost" | |
| }, | |
| { | |
| "type": "scan", | |
| "chosen": false, | |
| "cause": "cost" | |
| } | |
| ], | |
| "chosen_access_method": { | |
| "type": "ref", | |
| "records": 1, | |
| "cost": 1.16e7, | |
| "uses_join_buffering": false | |
| } | |
| }, | |
| "rows_for_plan": 1.16e7, | |
| "cost_for_plan": 1.63e7, | |
| "selectivity": 1.5e-6, | |
| "estimated_join_cardinality": 17.532 | |
| } | |
| ] | |
| } | |
| ] | |
| }, | |
| { | |
| "best_join_order": ["paragraphs_item", "paragraphs_item_field_data"] | |
| }, | |
| { | |
| "attaching_conditions_to_tables": { | |
| "original_condition": "paragraphs_item_field_data.`id` = paragraphs_item.`id` and paragraphs_item_field_data.`type` in ('carousel','latest_content_section','logo_callout','multiple_promo','people_promo','related_content_section','rich_text_block','vertical_content_listing','video') and paragraphs_item_field_data.`id` in ('483614','76841')", | |
| "attached_conditions_computation": [], | |
| "attached_conditions_summary": [ | |
| { | |
| "table": "paragraphs_item", | |
| "attached": null | |
| }, | |
| { | |
| "table": "paragraphs_item_field_data", | |
| "attached": "paragraphs_item_field_data.`type` in ('carousel','latest_content_section','logo_callout','multiple_promo','people_promo','related_content_section','rich_text_block','vertical_content_listing','video') and paragraphs_item_field_data.`id` in ('483614','76841')" | |
| } | |
| ] | |
| } | |
| } | |
| ] | |
| } | |
| }, | |
| { | |
| "join_execution": { | |
| "select_id": 1, | |
| "steps": [] | |
| } | |
| } | |
| ] | |
| } |
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