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 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 |
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 |
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 411 411: def calc_found_rows 412: clone(:calc_found_rows => true) 413: end
MySQL specific syntax for LIKE/REGEXP searches, as well as string concatenation.
# File lib/sequel/adapters/shared/mysql.rb, line 367 367: def complex_expression_sql_append(sql, op, args) 368: case op 369: when :IN, "NOT IN""NOT IN" 370: ds = args.at(1) 371: if ds.is_a?(Sequel::Dataset) && ds.opts[:limit] 372: super(sql, op, [args.at(0), ds.from_self]) 373: else 374: super 375: end 376: when :~, '!~''!~', '~*''~*', '!~*''!~*', :LIKE, 'NOT LIKE''NOT LIKE', :ILIKE, 'NOT ILIKE''NOT ILIKE' 377: sql << PAREN_OPEN 378: literal_append(sql, args.at(0)) 379: sql << SPACE 380: sql << 'NOT ' if ['NOT LIKE''NOT LIKE', 'NOT ILIKE''NOT ILIKE', '!~''!~', '!~*''!~*'].include?(op) 381: sql << ([:~, '!~''!~', '~*''~*', '!~*''!~*'].include?(op) ? REGEXP : LIKE) 382: sql << SPACE 383: sql << BINARY if [:~, '!~''!~', :LIKE, 'NOT LIKE''NOT LIKE'].include?(op) 384: literal_append(sql, args.at(1)) 385: sql << PAREN_CLOSE 386: when '||''||' 387: if args.length > 1 388: sql << CONCAT 389: array_sql_append(sql, args) 390: else 391: literal_append(sql, args.at(0)) 392: end 393: when 'B~''B~' 394: sql << CAST_BITCOMP_OPEN 395: literal_append(sql, args.at(0)) 396: sql << CAST_BITCOMP_CLOSE 397: else 398: super 399: end 400: end
Use GROUP BY instead of DISTINCT ON if arguments are provided.
# File lib/sequel/adapters/shared/mysql.rb, line 403 403: def distinct(*args) 404: args.empty? ? super : group(*args) 405: end
Return a cloned dataset which will use LOCK IN SHARE MODE to lock returned rows.
# File lib/sequel/adapters/shared/mysql.rb, line 416 416: def for_share 417: lock_style(:share) 418: end
Adds full text filter
# File lib/sequel/adapters/shared/mysql.rb, line 421 421: def full_text_search(cols, terms, opts = {}) 422: filter(full_text_sql(cols, terms, opts)) 423: 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 464 464: def insert_ignore 465: clone(:insert_ignore=>true) 466: 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 437 437: def join_table(type, table, expr=nil, table_alias={}, &block) 438: type = :inner if (type == :cross) && !expr.nil? 439: raise(Sequel::Error, "MySQL doesn't support FULL OUTER JOIN") if type == :full_outer 440: super(type, table, expr, table_alias, &block) 441: end
Transforms :natural_inner to NATURAL LEFT JOIN and straight to STRAIGHT_JOIN.
# File lib/sequel/adapters/shared/mysql.rb, line 445 445: def join_type_sql(join_type) 446: case join_type 447: when :straight 448: STRAIGHT_JOIN 449: when :natural_inner 450: NATURAL_LEFT_JOIN 451: else 452: super 453: end 454: end
MySQL specific syntax for inserting multiple values at once.
# File lib/sequel/adapters/shared/mysql.rb, line 492 492: def multi_insert_sql(columns, values) 493: sql = LiteralString.new('VALUES ') 494: expression_list_append(sql, values.map{|r| Array(r)}) 495: [insert_sql(columns, sql)] 496: 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 487 487: def on_duplicate_key_update(*args) 488: clone(:on_duplicate_key_update => args) 489: 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 540 540: def supports_timestamp_usecs? 541: false 542: end