Module | Sequel::MySQL::DatasetMethods |
In: |
lib/sequel/adapters/shared/mysql.rb
|
BOOL_TRUE | = | '1'.freeze |
BOOL_FALSE | = | '0'.freeze |
COMMA_SEPARATOR | = | ', '.freeze |
FOR_SHARE | = | ' LOCK IN SHARE MODE'.freeze |
SQL_CALC_FOUND_ROWS | = | ' SQL_CALC_FOUND_ROWS'.freeze |
DELETE_CLAUSE_METHODS | = | Dataset.clause_methods(:delete, %w'delete from where order limit') |
INSERT_CLAUSE_METHODS | = | Dataset.clause_methods(:insert, %w'insert ignore into columns values on_duplicate_key_update') |
SELECT_CLAUSE_METHODS | = | Dataset.clause_methods(:select, %w'select distinct calc_found_rows columns from join where group having compounds order limit lock') |
UPDATE_CLAUSE_METHODS | = | Dataset.clause_methods(:update, %w'update ignore table set where order limit') |
SPACE | = | Dataset::SPACE |
PAREN_OPEN | = | Dataset::PAREN_OPEN |
PAREN_CLOSE | = | Dataset::PAREN_CLOSE |
NOT_SPACE | = | Dataset::NOT_SPACE |
FROM | = | Dataset::FROM |
INSERT | = | Dataset::INSERT |
COMMA | = | Dataset::COMMA |
LIMIT | = | Dataset::LIMIT |
GROUP_BY | = | Dataset::GROUP_BY |
REGEXP | = | 'REGEXP'.freeze |
LIKE | = | 'LIKE'.freeze |
BINARY | = | 'BINARY '.freeze |
CONCAT | = | "CONCAT".freeze |
CAST_BITCOMP_OPEN | = | "CAST(~".freeze |
CAST_BITCOMP_CLOSE | = | " AS SIGNED INTEGER)".freeze |
STRAIGHT_JOIN | = | 'STRAIGHT_JOIN'.freeze |
NATURAL_LEFT_JOIN | = | 'NATURAL LEFT JOIN'.freeze |
BACKTICK | = | '`'.freeze |
EMPTY_COLUMNS | = | " ()".freeze |
EMPTY_VALUES | = | " VALUES ()".freeze |
IGNORE | = | " IGNORE".freeze |
REPLACE | = | 'REPLACE'.freeze |
ON_DUPLICATE_KEY_UPDATE | = | " ON DUPLICATE KEY UPDATE ".freeze |
EQ_VALUES | = | '=VALUES('.freeze |
EQ | = | '='.freeze |
WITH_ROLLUP | = | ' WITH ROLLUP'.freeze |
Sets up the select methods to use SQL_CALC_FOUND_ROWS option.
dataset.calc_found_rows.limit(10) # SELECT SQL_CALC_FOUND_ROWS * FROM table LIMIT 10
# File lib/sequel/adapters/shared/mysql.rb, line 418 418: def calc_found_rows 419: clone(:calc_found_rows => true) 420: end
MySQL specific syntax for LIKE/REGEXP searches, as well as string concatenation.
# File lib/sequel/adapters/shared/mysql.rb, line 374 374: def complex_expression_sql_append(sql, op, args) 375: case op 376: when :IN, "NOT IN""NOT IN" 377: ds = args.at(1) 378: if ds.is_a?(Sequel::Dataset) && ds.opts[:limit] 379: super(sql, op, [args.at(0), ds.from_self]) 380: else 381: super 382: end 383: when :~, '!~''!~', '~*''~*', '!~*''!~*', :LIKE, 'NOT LIKE''NOT LIKE', :ILIKE, 'NOT ILIKE''NOT ILIKE' 384: sql << PAREN_OPEN 385: literal_append(sql, args.at(0)) 386: sql << SPACE 387: sql << 'NOT ' if ['NOT LIKE''NOT LIKE', 'NOT ILIKE''NOT ILIKE', '!~''!~', '!~*''!~*'].include?(op) 388: sql << ([:~, '!~''!~', '~*''~*', '!~*''!~*'].include?(op) ? REGEXP : LIKE) 389: sql << SPACE 390: sql << BINARY if [:~, '!~''!~', :LIKE, 'NOT LIKE''NOT LIKE'].include?(op) 391: literal_append(sql, args.at(1)) 392: sql << PAREN_CLOSE 393: when '||''||' 394: if args.length > 1 395: sql << CONCAT 396: array_sql_append(sql, args) 397: else 398: literal_append(sql, args.at(0)) 399: end 400: when 'B~''B~' 401: sql << CAST_BITCOMP_OPEN 402: literal_append(sql, args.at(0)) 403: sql << CAST_BITCOMP_CLOSE 404: else 405: super 406: end 407: end
Use GROUP BY instead of DISTINCT ON if arguments are provided.
# File lib/sequel/adapters/shared/mysql.rb, line 410 410: def distinct(*args) 411: args.empty? ? super : group(*args) 412: end
Return a cloned dataset which will use LOCK IN SHARE MODE to lock returned rows.
# File lib/sequel/adapters/shared/mysql.rb, line 423 423: def for_share 424: lock_style(:share) 425: end
Adds full text filter
# File lib/sequel/adapters/shared/mysql.rb, line 428 428: def full_text_search(cols, terms, opts = {}) 429: filter(full_text_sql(cols, terms, opts)) 430: end
MySQL specific full text search syntax.
# File lib/sequel/adapters/shared/mysql.rb, line 433 433: def full_text_sql(cols, terms, opts = {}) 434: terms = terms.join(' ') if terms.is_a?(Array) 435: SQL::PlaceholderLiteralString.new("MATCH ? AGAINST (?#{" IN BOOLEAN MODE" if opts[:boolean]})", [Array(cols), terms], true) 436: end
Sets up the insert methods to use INSERT IGNORE. Useful if you have a unique key and want to just skip inserting rows that violate the unique key restriction.
dataset.insert_ignore.multi_insert( [{:name => 'a', :value => 1}, {:name => 'b', :value => 2}] ) # INSERT IGNORE INTO tablename (name, value) VALUES (a, 1), (b, 2)
# File lib/sequel/adapters/shared/mysql.rb, line 472 472: def insert_ignore 473: clone(:insert_ignore=>true) 474: end
Transforms an CROSS JOIN to an INNER JOIN if the expr is not nil. Raises an error on use of :full_outer type, since MySQL doesn‘t support it.
# File lib/sequel/adapters/shared/mysql.rb, line 445 445: def join_table(type, table, expr=nil, table_alias={}, &block) 446: type = :inner if (type == :cross) && !expr.nil? 447: raise(Sequel::Error, "MySQL doesn't support FULL OUTER JOIN") if type == :full_outer 448: super(type, table, expr, table_alias, &block) 449: end
Transforms :natural_inner to NATURAL LEFT JOIN and straight to STRAIGHT_JOIN.
# File lib/sequel/adapters/shared/mysql.rb, line 453 453: def join_type_sql(join_type) 454: case join_type 455: when :straight 456: STRAIGHT_JOIN 457: when :natural_inner 458: NATURAL_LEFT_JOIN 459: else 460: super 461: end 462: end
MySQL specific syntax for inserting multiple values at once.
# File lib/sequel/adapters/shared/mysql.rb, line 500 500: def multi_insert_sql(columns, values) 501: sql = LiteralString.new('VALUES ') 502: expression_list_append(sql, values.map{|r| Array(r)}) 503: [insert_sql(columns, sql)] 504: end
Sets up the insert methods to use ON DUPLICATE KEY UPDATE If you pass no arguments, ALL fields will be updated with the new values. If you pass the fields you want then ONLY those field will be updated.
Useful if you have a unique key and want to update inserting rows that violate the unique key restriction.
dataset.on_duplicate_key_update.multi_insert( [{:name => 'a', :value => 1}, {:name => 'b', :value => 2}] ) # INSERT INTO tablename (name, value) VALUES (a, 1), (b, 2) # ON DUPLICATE KEY UPDATE name=VALUES(name), value=VALUES(value) dataset.on_duplicate_key_update(:value).multi_insert( [{:name => 'a', :value => 1}, {:name => 'b', :value => 2}] ) # INSERT INTO tablename (name, value) VALUES (a, 1), (b, 2) # ON DUPLICATE KEY UPDATE value=VALUES(value)
# File lib/sequel/adapters/shared/mysql.rb, line 495 495: def on_duplicate_key_update(*args) 496: clone(:on_duplicate_key_update => args) 497: end
MySQL does support fractional timestamps in literal timestamps, but it ignores them. Also, using them seems to cause problems on 1.9. Since they are ignored anyway, not using them is probably best.
# File lib/sequel/adapters/shared/mysql.rb, line 553 553: def supports_timestamp_usecs? 554: false 555: end
Sets up the update methods to use UPDATE IGNORE. Useful if you have a unique key and want to just skip updating rows that violate the unique key restriction.
dataset.update_ignore.update({:name => 'a', :value => 1}) # UPDATE IGNORE tablename SET name = 'a', value = 1
# File lib/sequel/adapters/shared/mysql.rb, line 563 563: def update_ignore 564: clone(:update_ignore=>true) 565: end