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Class: Arel::Visitors::PostgreSQL

Do not use. This class is for internal use only.
Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ToSql, Visitor
Instance Chain:
self, ToSql, Visitor
Inherits: Arel::Visitors::ToSql
Defined in: activerecord/lib/arel/visitors/postgresql.rb

Constant Summary

ToSql - Inherited

BIND_BLOCK

Class Method Summary

ToSql - Inherited

.new

Visitor - Inherited

.new, .dispatch_cache

Instance Attribute Summary

Visitor - Inherited

#dispatch

Instance Method Summary

ToSql - Inherited

#compile, #aggregate, #bind_block,
#build_subselect

FIXME: we should probably have a 2-pass visitor for this.
#collect_ctes, #collect_nodes_for, #collect_optimizer_hints, #has_group_by_and_having?, #has_join_sources?, #has_limit_or_offset_or_orders?, #infix_value, #infix_value_with_paren, #inject_join, #is_distinct_from, #maybe_visit,
#prepare_delete_statement

Alias for ToSql#prepare_update_statement.
#prepare_update_statement

The default strategy for an UPDATE with joins is to use a subquery.
#quote, #quote_column_name, #quote_table_name, #sanitize_as_sql_comment, #unboundable?, #unsupported, #visit_ActiveModel_Attribute,
#visit_ActiveSupport_Multibyte_Chars

Alias for ToSql#unsupported.
#visit_ActiveSupport_StringInquirer

Alias for ToSql#unsupported.
#visit_Arel_Attributes_Attribute, #visit_Arel_Nodes_And, #visit_Arel_Nodes_As, #visit_Arel_Nodes_Ascending, #visit_Arel_Nodes_Assignment, #visit_Arel_Nodes_Avg, #visit_Arel_Nodes_Between, #visit_Arel_Nodes_Bin, #visit_Arel_Nodes_BindParam, #visit_Arel_Nodes_BoundSqlLiteral, #visit_Arel_Nodes_Case, #visit_Arel_Nodes_Casted, #visit_Arel_Nodes_Comment, #visit_Arel_Nodes_Count, #visit_Arel_Nodes_Cte, #visit_Arel_Nodes_CurrentRow, #visit_Arel_Nodes_DeleteStatement, #visit_Arel_Nodes_Descending, #visit_Arel_Nodes_Distinct, #visit_Arel_Nodes_DistinctOn, #visit_Arel_Nodes_DoesNotMatch, #visit_Arel_Nodes_Else, #visit_Arel_Nodes_Equality, #visit_Arel_Nodes_Except, #visit_Arel_Nodes_Exists, #visit_Arel_Nodes_Extract, #visit_Arel_Nodes_False, #visit_Arel_Nodes_Filter, #visit_Arel_Nodes_Following, #visit_Arel_Nodes_Fragments, #visit_Arel_Nodes_FullOuterJoin, #visit_Arel_Nodes_GreaterThan, #visit_Arel_Nodes_GreaterThanOrEqual, #visit_Arel_Nodes_Group, #visit_Arel_Nodes_Grouping, #visit_Arel_Nodes_HomogeneousIn, #visit_Arel_Nodes_In, #visit_Arel_Nodes_InfixOperation, #visit_Arel_Nodes_InnerJoin, #visit_Arel_Nodes_InsertStatement, #visit_Arel_Nodes_Intersect, #visit_Arel_Nodes_IsDistinctFrom, #visit_Arel_Nodes_IsNotDistinctFrom, #visit_Arel_Nodes_JoinSource, #visit_Arel_Nodes_LessThan, #visit_Arel_Nodes_LessThanOrEqual, #visit_Arel_Nodes_Limit, #visit_Arel_Nodes_Lock, #visit_Arel_Nodes_Matches, #visit_Arel_Nodes_Max, #visit_Arel_Nodes_Min, #visit_Arel_Nodes_NamedFunction, #visit_Arel_Nodes_NamedWindow, #visit_Arel_Nodes_Not, #visit_Arel_Nodes_NotEqual, #visit_Arel_Nodes_NotIn, #visit_Arel_Nodes_NotRegexp,
#visit_Arel_Nodes_NullsFirst

NullsFirst is available on all but MySQL, where it is redefined.
#visit_Arel_Nodes_NullsLast, #visit_Arel_Nodes_Offset, #visit_Arel_Nodes_On, #visit_Arel_Nodes_OptimizerHints, #visit_Arel_Nodes_Or, #visit_Arel_Nodes_OuterJoin, #visit_Arel_Nodes_Over, #visit_Arel_Nodes_Preceding,
#visit_Arel_Nodes_Quoted

Alias for ToSql#visit_Arel_Nodes_Casted.
#visit_Arel_Nodes_Range, #visit_Arel_Nodes_Regexp, #visit_Arel_Nodes_RightOuterJoin, #visit_Arel_Nodes_Rows, #visit_Arel_Nodes_SelectCore,
#visit_Arel_Nodes_SelectOptions

The Oracle enhanced adapter uses this private method, see github.com/rsim/oracle-enhanced/issues/2186.
#visit_Arel_Nodes_SelectStatement, #visit_Arel_Nodes_SqlLiteral, #visit_Arel_Nodes_StringJoin, #visit_Arel_Nodes_Sum, #visit_Arel_Nodes_TableAlias, #visit_Arel_Nodes_True, #visit_Arel_Nodes_UnaryOperation, #visit_Arel_Nodes_Union, #visit_Arel_Nodes_UnionAll, #visit_Arel_Nodes_UnqualifiedColumn, #visit_Arel_Nodes_UpdateStatement, #visit_Arel_Nodes_ValuesList, #visit_Arel_Nodes_When, #visit_Arel_Nodes_Window, #visit_Arel_Nodes_With, #visit_Arel_Nodes_WithRecursive, #visit_Arel_SelectManager, #visit_Arel_Table, #visit_Array,
#visit_BigDecimal

Alias for ToSql#unsupported.
#visit_Class

Alias for ToSql#unsupported.
#visit_Date

Alias for ToSql#unsupported.
#visit_DateTime

Alias for ToSql#unsupported.
#visit_FalseClass

Alias for ToSql#unsupported.
#visit_Float

Alias for ToSql#unsupported.
#visit_Hash

Alias for ToSql#unsupported.
#visit_Integer,
#visit_NilClass

Alias for ToSql#unsupported.
#visit_Set

Alias for ToSql#visit_Array.
#visit_String

Alias for ToSql#unsupported.
#visit_Symbol

Alias for ToSql#unsupported.
#visit_Time

Alias for ToSql#unsupported.
#visit_TrueClass

Alias for ToSql#unsupported.

Visitor - Inherited

#accept, #get_dispatch_cache, #visit

Constructor Details

This class inherits a constructor from Arel::Visitors::ToSql

Instance Method Details

#bind_block (private)

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 84



def bind_block; BIND_BLOCK; end


  








  

    #grouping_array_or_grouping_element(o, collector)   (private)
  



  

    

Utilized by GroupingSet, Cube & RollUp visitors to handle grouping aggregation semantics


  



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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 99



def grouping_array_or_grouping_element(o, collector)
  if o.expr.is_a? Array
    collector << "( "
    visit o.expr, collector
    collector << " )"
  else
    visit o.expr, collector
  end
end


  








  

    #grouping_parentheses(o, collector)   (private)
  



  

    

Used by Lateral visitor to enclose select queries in parentheses


  



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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 87



def grouping_parentheses(o, collector)
  if o.expr.is_a? Nodes::SelectStatement
    collector << "("
    visit o.expr, collector
    collector << ")"
  else
    visit o.expr, collector
  end
end


  








  

    #visit_Arel_Nodes_Cube(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 49



def visit_Arel_Nodes_Cube(o, collector)
  collector << "CUBE"
  grouping_array_or_grouping_element o, collector
end


  








  

    #visit_Arel_Nodes_DistinctOn(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 39



def visit_Arel_Nodes_DistinctOn(o, collector)
  collector << "DISTINCT ON ( "
  visit(o.expr, collector) << " )"
end


  








  

    #visit_Arel_Nodes_DoesNotMatch(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 18



def visit_Arel_Nodes_DoesNotMatch(o, collector)
  op = o.case_sensitive ? " NOT LIKE " : " NOT ILIKE "
  collector = infix_value o, collector, op
  if o.escape
    collector << " ESCAPE "
    visit o.escape, collector
  else
    collector
  end
end


  








  

    #visit_Arel_Nodes_GroupingElement(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 44



def visit_Arel_Nodes_GroupingElement(o, collector)
  collector << "( "
  visit(o.expr, collector) << " )"
end


  








  

    #visit_Arel_Nodes_GroupingSet(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 59



def visit_Arel_Nodes_GroupingSet(o, collector)
  collector << "GROUPING SETS"
  grouping_array_or_grouping_element o, collector
end


  








  

    #visit_Arel_Nodes_IsDistinctFrom(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 75



def visit_Arel_Nodes_IsDistinctFrom(o, collector)
  collector = visit o.left, collector
  collector << " IS DISTINCT FROM "
  visit o.right, collector
end


  








  

    #visit_Arel_Nodes_IsNotDistinctFrom(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 69



def visit_Arel_Nodes_IsNotDistinctFrom(o, collector)
  collector = visit o.left, collector
  collector << " IS NOT DISTINCT FROM "
  visit o.right, collector
end


  








  

    #visit_Arel_Nodes_Lateral(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 64



def visit_Arel_Nodes_Lateral(o, collector)
  collector << "LATERAL "
  grouping_parentheses o, collector
end


  








  

    #visit_Arel_Nodes_Matches(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 7



def visit_Arel_Nodes_Matches(o, collector)
  op = o.case_sensitive ? " LIKE " : " ILIKE "
  collector = infix_value o, collector, op
  if o.escape
    collector << " ESCAPE "
    visit o.escape, collector
  else
    collector
  end
end


  








  

    #visit_Arel_Nodes_NotRegexp(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 34



def visit_Arel_Nodes_NotRegexp(o, collector)
  op = o.case_sensitive ? " !~ " : " !~* "
  infix_value o, collector, op
end


  








  

    #visit_Arel_Nodes_Regexp(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 29



def visit_Arel_Nodes_Regexp(o, collector)
  op = o.case_sensitive ? " ~ " : " ~* "
  infix_value o, collector, op
end


  








  

    #visit_Arel_Nodes_RollUp(o, collector)   (private)
  

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# File 'activerecord/lib/arel/visitors/postgresql.rb', line 54



def visit_Arel_Nodes_RollUp(o, collector)
  collector << "ROLLUP"
  grouping_array_or_grouping_element o, collector
end