Module: Sequel::SQL::StringMethods

Included in:
Dataset, LiteralString, GenericExpression, StringAgg, StringExpression, Symbol
Defined in:
lib/sequel/sql.rb,
lib/sequel/extensions/escaped_like.rb

Overview

This module includes the like and ilike methods used for pattern matching that are defined on objects that can be used in a string context in SQL (Symbol, LiteralString, SQL::GenericExpression).

Instance Method Summary collapse

Instance Method Details

#escaped_ilike(placeholder_pattern, placeholder_values) ⇒ Object

Create a EscapedLikeExpression case insensitive pattern match of the receiver with the patterns, interpolated escaped values for each ? placeholder in the pattern. 

Sequel[:a].escaped_ilike('?%', 'A') # "a" ILIKE 'A%' ESCAPE '\'
Sequel[:a].escaped_ilike('?%', '%A') # "a" ILIKE '\%A%' ESCAPE '\'



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# File 'lib/sequel/extensions/escaped_like.rb', line 85

def escaped_ilike(placeholder_pattern, placeholder_values)
  EscapedLikeExpression.new(self, false, placeholder_pattern, placeholder_values)
end

#escaped_like(placeholder_pattern, placeholder_values) ⇒ Object

Create a EscapedLikeExpression case sensitive pattern match of the receiver with the patterns, interpolated escaped values for each ? placeholder in the pattern. 

Sequel[:a].escaped_like('?%', 'A') # "a" LIKE 'A%' ESCAPE '\'
Sequel[:a].escaped_like('?%', '%A') # "a" LIKE '\%A%' ESCAPE '\'



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# File 'lib/sequel/extensions/escaped_like.rb', line 95

def escaped_like(placeholder_pattern, placeholder_values)
  EscapedLikeExpression.new(self, true, placeholder_pattern, placeholder_values)
end

#ilike(*ces) ⇒ Object

Create a BooleanExpression case insensitive pattern match of the receiver with the given patterns. See StringExpression.like.

Sequel[:a].ilike('A%') # "a" ILIKE 'A%' ESCAPE '\'



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# File 'lib/sequel/sql.rb', line 958

def ilike(*ces)
  StringExpression.like(self, *(ces << {:case_insensitive=>true}))
end

#like(*ces) ⇒ Object

Create a BooleanExpression case sensitive (if the database supports it) pattern match of the receiver with the given patterns. See StringExpression.like.

Sequel[:a].like('A%') # "a" LIKE 'A%' ESCAPE '\'



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# File 'lib/sequel/sql.rb', line 966

def like(*ces)
  StringExpression.like(self, *ces)
end