Module: ThinkingSphinx::Source::SQL
- Included in:
- ThinkingSphinx::Source
- Defined in:
- lib/thinking_sphinx/source/sql.rb
Instance Method Summary collapse
- #crc_column ⇒ Object
- #quote_column(column) ⇒ Object
- #sql_group_clause ⇒ Object
- #sql_query_pre_for_core ⇒ Object
- #sql_query_pre_for_delta ⇒ Object
- #sql_select_clause(offset) ⇒ Object
- #sql_where_clause(options) ⇒ Object
-
#to_sql(options = {}) ⇒ Object
Generates the big SQL statement to get the data back for all the fields and attributes, using all the relevant association joins.
-
#to_sql_query_info(offset) ⇒ Object
Simple helper method for the query info SQL - which is a statement that returns the single row for a corresponding id.
-
#to_sql_query_range(options = {}) ⇒ Object
Simple helper method for the query range SQL - which is a statement that returns minimum and maximum id values.
Instance Method Details
#crc_column ⇒ Object
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# File 'lib/thinking_sphinx/source/sql.rb', line 133 def crc_column if @model.table_exists? && @model.column_names.include?(@model.inheritance_column) adapter.cast_to_unsigned(adapter.convert_nulls( adapter.crc(adapter.quote_with_table(@model.inheritance_column), true), @model.to_crc32 )) else @model.to_crc32.to_s end end |
#quote_column(column) ⇒ Object
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# File 'lib/thinking_sphinx/source/sql.rb', line 129 def quote_column(column) @model.connection.quote_column_name(column) end |
#sql_group_clause ⇒ Object
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# File 'lib/thinking_sphinx/source/sql.rb', line 102 def sql_group_clause internal_groupings = [] if @model.column_names.include?(@model.inheritance_column) internal_groupings << "#{@model.quoted_table_name}.#{quote_column(@model.inheritance_column)}" end ( ["#{@model.quoted_table_name}.#{quote_column(@model.primary_key_for_sphinx)}"] + @fields.collect { |field| field.to_group_sql }.compact + @attributes.collect { |attribute| attribute.to_group_sql }.compact + @groupings + internal_groupings ).join(", ") end |
#sql_query_pre_for_core ⇒ Object
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# File 'lib/thinking_sphinx/source/sql.rb', line 116 def sql_query_pre_for_core if ![:delta] and self.delta? #REPLACE INTO sph_counter SELECT 'sos', Max(id) FROM sos ["REPLACE INTO sph_counter SELECT '#{@model.table_name}', Max(id) FROM #{@model.quoted_table_name}"] else [] end end |
#sql_query_pre_for_delta ⇒ Object
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# File 'lib/thinking_sphinx/source/sql.rb', line 125 def sql_query_pre_for_delta [""] end |
#sql_select_clause(offset) ⇒ Object
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# File 'lib/thinking_sphinx/source/sql.rb', line 77 def sql_select_clause(offset) unique_id_expr = ThinkingSphinx.unique_id_expression(offset) ( ["#{@model.quoted_table_name}.#{quote_column(@model.primary_key_for_sphinx)} #{unique_id_expr} AS #{quote_column(@model.primary_key_for_sphinx)} "] + @fields.collect { |field| field.to_select_sql } + @attributes.collect { |attribute| attribute.to_select_sql } ).compact.join(", ") end |
#sql_where_clause(options) ⇒ Object
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# File 'lib/thinking_sphinx/source/sql.rb', line 87 def sql_where_clause() logic = [] logic += [ "#{@model.quoted_table_name}.#{quote_column(@model.primary_key_for_sphinx)} >= $start", "#{@model.quoted_table_name}.#{quote_column(@model.primary_key_for_sphinx)} <= $end" ] unless @index.[:disable_range] # if self.delta? && [email protected]_object.clause(@model, options[:delta]).blank? # logic << "#{@index.delta_object.clause(@model, options[:delta])}" # end logic += (@conditions || []) logic.empty? ? "" : "WHERE #{logic.join(' AND ')}" end |
#to_sql(options = {}) ⇒ Object
Generates the big SQL statement to get the data back for all the fields and attributes, using all the relevant association joins. If you want the version filtered for delta values, send through :delta => true in the options. Won’t do much though if the index isn’t set up to support a delta sibling.
Examples:
source.to_sql
source.to_sql(:delta => true)
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# File 'lib/thinking_sphinx/source/sql.rb', line 15 def to_sql(={}) sql = "SELECT " sql += "SQL_NO_CACHE " if adapter.sphinx_identifier == "mysql" sql += <<-SQL #{ sql_select_clause [:offset] } FROM #{ @model.quoted_table_name } #{ all_associations.collect { |assoc| assoc.to_sql }.join(' ') } #{ sql_where_clause() } GROUP BY #{ sql_group_clause } SQL sql += " ORDER BY id desc" if adapter.sphinx_identifier == "mysql" sql end |
#to_sql_query_info(offset) ⇒ Object
Simple helper method for the query info SQL - which is a statement that returns the single row for a corresponding id.
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# File 'lib/thinking_sphinx/source/sql.rb', line 72 def to_sql_query_info(offset) "SELECT * FROM #{@model.quoted_table_name} WHERE " + "#{quote_column(@model.primary_key_for_sphinx)} = (($id - #{offset}) / #{ThinkingSphinx.context.indexed_models.size})" end |
#to_sql_query_range(options = {}) ⇒ Object
Simple helper method for the query range SQL - which is a statement that returns minimum and maximum id values. These can be filtered by delta - so pass in :delta => true to get the delta version of the SQL.
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# File 'lib/thinking_sphinx/source/sql.rb', line 34 def to_sql_query_range(={}) return nil if @index.[:disable_range] if ![:delta] and self.delta? #SELECT Min(id), Max(id) FROM sos WHERE id <= (SELECT last_id FROM sph_counter WHERE table_name = 'sos') min_statement = adapter.convert_nulls( "MIN(#{quote_column(@model.primary_key_for_sphinx)})", 1 ) max_statement = adapter.convert_nulls( "MAX(#{quote_column(@model.primary_key_for_sphinx)})", 1 ) sql = "SELECT #{min_statement}, #{max_statement} " + "FROM #{@model.quoted_table_name} WHERE #{@model.primary_key_for_sphinx} <= (SELECT last_id FROM sph_counter WHERE table_name = '#{@model.table_name}')" else min_statement = adapter.convert_nulls( "MIN(#{quote_column(@model.primary_key_for_sphinx)})", 1 ) max_statement = adapter.convert_nulls( "MAX(#{quote_column(@model.primary_key_for_sphinx)})", 1 ) sql = "SELECT #{min_statement}, #{max_statement} " + "FROM #{@model.quoted_table_name} " if self.delta? #sql_query_range = SELECT Min(id), Max(id) FROM sos WHERE id > (SELECT last_id FROM sph_counter WHERE table_name = 'sos') sql += "WHERE #{@model.primary_key_for_sphinx} > (SELECT last_id FROM sph_counter WHERE table_name = '#{@model.table_name}')" end end sql end |