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') |
APOS | = | Dataset::APOS |
APOS_RE | = | Dataset::APOS_RE |
DOUBLE_APOS | = | Dataset::DOUBLE_APOS |
SPACE | = | Dataset::SPACE |
PAREN_OPEN | = | Dataset::PAREN_OPEN |
PAREN_CLOSE | = | Dataset::PAREN_CLOSE |
NOT_SPACE | = | Dataset::NOT_SPACE |
FROM | = | Dataset::FROM |
COMMA | = | Dataset::COMMA |
LIMIT | = | Dataset::LIMIT |
GROUP_BY | = | Dataset::GROUP_BY |
ESCAPE | = | Dataset::ESCAPE |
BACKSLASH | = | Dataset::BACKSLASH |
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 |
BACKTICK_RE | = | /`/.freeze |
DOUBLE_BACKTICK | = | '``'.freeze |
EMPTY_COLUMNS | = | " ()".freeze |
EMPTY_VALUES | = | " VALUES ()".freeze |
IGNORE | = | " IGNORE".freeze |
ON_DUPLICATE_KEY_UPDATE | = | " ON DUPLICATE KEY UPDATE ".freeze |
EQ_VALUES | = | '=VALUES('.freeze |
EQ | = | '='.freeze |
WITH_ROLLUP | = | ' WITH ROLLUP'.freeze |
MATCH_AGAINST | = | ["(MATCH ".freeze, " AGAINST (".freeze, "))".freeze].freeze |
MATCH_AGAINST_BOOLEAN | = | ["(MATCH ".freeze, " AGAINST (".freeze, " IN BOOLEAN MODE))".freeze].freeze |
EXPLAIN | = | 'EXPLAIN '.freeze |
EXPLAIN_EXTENDED | = | 'EXPLAIN EXTENDED '.freeze |
BACKSLASH_RE | = | /\\/.freeze |
QUAD_BACKSLASH | = | "\\\\\\\\".freeze |
BLOB_START | = | "0x".freeze |
HSTAR | = | "H*".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 620 620: def calc_found_rows 621: clone(:calc_found_rows => true) 622: end
MySQL specific syntax for LIKE/REGEXP searches, as well as string concatenation.
# File lib/sequel/adapters/shared/mysql.rb, line 572 572: def complex_expression_sql_append(sql, op, args) 573: case op 574: when :IN, "NOT IN""NOT IN" 575: ds = args.at(1) 576: if ds.is_a?(Sequel::Dataset) && ds.opts[:limit] 577: super(sql, op, [args.at(0), ds.from_self]) 578: else 579: super 580: end 581: when :~, '!~''!~', '~*''~*', '!~*''!~*', :LIKE, 'NOT LIKE''NOT LIKE', :ILIKE, 'NOT ILIKE''NOT ILIKE' 582: sql << PAREN_OPEN 583: literal_append(sql, args.at(0)) 584: sql << SPACE 585: sql << 'NOT ' if ['NOT LIKE''NOT LIKE', 'NOT ILIKE''NOT ILIKE', '!~''!~', '!~*''!~*'].include?(op) 586: sql << ([:~, '!~''!~', '~*''~*', '!~*''!~*'].include?(op) ? REGEXP : LIKE) 587: sql << SPACE 588: sql << BINARY if [:~, '!~''!~', :LIKE, 'NOT LIKE''NOT LIKE'].include?(op) 589: literal_append(sql, args.at(1)) 590: if [:LIKE, 'NOT LIKE''NOT LIKE', :ILIKE, 'NOT ILIKE''NOT ILIKE'].include?(op) 591: sql << ESCAPE 592: literal_append(sql, BACKSLASH) 593: end 594: sql << PAREN_CLOSE 595: when '||''||' 596: if args.length > 1 597: sql << CONCAT 598: array_sql_append(sql, args) 599: else 600: literal_append(sql, args.at(0)) 601: end 602: when 'B~''B~' 603: sql << CAST_BITCOMP_OPEN 604: literal_append(sql, args.at(0)) 605: sql << CAST_BITCOMP_CLOSE 606: else 607: super 608: end 609: end
Use GROUP BY instead of DISTINCT ON if arguments are provided.
# File lib/sequel/adapters/shared/mysql.rb, line 612 612: def distinct(*args) 613: args.empty? ? super : group(*args) 614: end
Return the results of an EXPLAIN query as a string. Options:
:extended : | Use EXPLAIN EXPTENDED instead of EXPLAIN if true. |
# File lib/sequel/adapters/shared/mysql.rb, line 626 626: def explain(opts=OPTS) 627: # Load the PrettyTable class, needed for explain output 628: Sequel.extension(:_pretty_table) unless defined?(Sequel::PrettyTable) 629: 630: ds = db.send(:metadata_dataset).with_sql((opts[:extended] ? EXPLAIN_EXTENDED : EXPLAIN) + select_sql).naked 631: rows = ds.all 632: Sequel::PrettyTable.string(rows, ds.columns) 633: end
Return a cloned dataset which will use LOCK IN SHARE MODE to lock returned rows.
# File lib/sequel/adapters/shared/mysql.rb, line 636 636: def for_share 637: lock_style(:share) 638: end
Adds full text filter
# File lib/sequel/adapters/shared/mysql.rb, line 641 641: def full_text_search(cols, terms, opts = OPTS) 642: filter(full_text_sql(cols, terms, opts)) 643: end
MySQL specific full text search syntax.
# File lib/sequel/adapters/shared/mysql.rb, line 646 646: def full_text_sql(cols, terms, opts = OPTS) 647: terms = terms.join(' ') if terms.is_a?(Array) 648: SQL::PlaceholderLiteralString.new((opts[:boolean] ? MATCH_AGAINST_BOOLEAN : MATCH_AGAINST), [Array(cols), terms]) 649: 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 680 680: def insert_ignore 681: clone(:insert_ignore=>true) 682: 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 653 653: def join_table(type, table, expr=nil, opts=OPTS, &block) 654: type = :inner if (type == :cross) && !expr.nil? 655: raise(Sequel::Error, "MySQL doesn't support FULL OUTER JOIN") if type == :full_outer 656: super(type, table, expr, opts, &block) 657: end
Transforms :natural_inner to NATURAL LEFT JOIN and straight to STRAIGHT_JOIN.
# File lib/sequel/adapters/shared/mysql.rb, line 661 661: def join_type_sql(join_type) 662: case join_type 663: when :straight 664: STRAIGHT_JOIN 665: when :natural_inner 666: NATURAL_LEFT_JOIN 667: else 668: super 669: end 670: end
MySQL specific syntax for inserting multiple values at once.
# File lib/sequel/adapters/shared/mysql.rb, line 708 708: def multi_insert_sql(columns, values) 709: sql = LiteralString.new('VALUES ') 710: expression_list_append(sql, values.map{|r| Array(r)}) 711: [insert_sql(columns, sql)] 712: 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 703 703: def on_duplicate_key_update(*args) 704: clone(:on_duplicate_key_update => args) 705: 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 754 754: def supports_timestamp_usecs? 755: false 756: 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 764 764: def update_ignore 765: clone(:update_ignore=>true) 766: end