Module: ActiveRecord::ConnectionAdapters::Firebird::SchemaStatements

Included in:
ActiveRecord::ConnectionAdapters::FirebirdAdapter
Defined in:
lib/active_record/connection_adapters/firebird/schema_statements.rb

Instance Method Summary collapse

Instance Method Details

#foreign_keys(table_name) ⇒ Object 



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# File 'lib/active_record/connection_adapters/firebird/schema_statements.rb', line 52

def foreign_keys(table_name)
  result = query(<<-SQL.strip_heredoc, "SCHEMA")
    WITH FK_FIELDS AS (
      SELECT
        AA2.RDB$RELATION_NAME,
        AA2.RDB$CONSTRAINT_NAME,
        BB2.RDB$CONST_NAME_UQ AS LINK_UK_OR_PK,
        EE2.RDB$RELATION_NAME AS REFERENCE_TABLE,
        CC2.RDB$FIELD_NAME,
        AA2.RDB$CONSTRAINT_TYPE
      FROM
        RDB$RELATION_CONSTRAINTS AA2
        LEFT JOIN RDB$REF_CONSTRAINTS BB2 ON BB2.RDB$CONSTRAINT_NAME = AA2.RDB$CONSTRAINT_NAME
        LEFT JOIN RDB$INDEX_SEGMENTS CC2 ON CC2.RDB$INDEX_NAME = AA2.RDB$INDEX_NAME
        LEFT JOIN RDB$RELATION_FIELDS DD2 ON DD2.RDB$FIELD_NAME = CC2.RDB$FIELD_NAME AND DD2.RDB$RELATION_NAME = AA2.RDB$RELATION_NAME
        LEFT JOIN RDB$RELATION_CONSTRAINTS EE2 ON EE2.RDB$CONSTRAINT_NAME = BB2.RDB$CONST_NAME_UQ
    )
    SELECT
      AA.RDB$CONSTRAINT_NAME,
      BB.REFERENCE_TABLE,
      BB.FIELDS,
      BB.REFERENCE_FIELDS
    FROM
      RDB$RELATION_CONSTRAINTS AA
      LEFT JOIN (
        SELECT
          AA1.RDB$RELATION_NAME,
          AA1.RDB$CONSTRAINT_NAME,
          AA1.LINK_UK_OR_PK,
          AA1.REFERENCE_TABLE,
          (
            SELECT LIST(TRIM(AA3.RDB$FIELD_NAME), ', ') FROM FK_FIELDS AA3 WHERE AA3.RDB$CONSTRAINT_NAME = AA1.RDB$CONSTRAINT_NAME ROWS 1
          ) AS FIELDS,
          (
            SELECT LIST(TRIM(AA4.RDB$FIELD_NAME), ', ') FROM FK_FIELDS AA4 WHERE AA4.RDB$CONSTRAINT_NAME = AA1.LINK_UK_OR_PK ROWS 1
          ) AS REFERENCE_FIELDS
        FROM
          FK_FIELDS AA1
        GROUP BY
          AA1.RDB$RELATION_NAME,
          AA1.RDB$CONSTRAINT_NAME,
          AA1.REFERENCE_TABLE,
          AA1.LINK_UK_OR_PK
      ) BB ON BB.RDB$RELATION_NAME = AA.RDB$RELATION_NAME AND BB.RDB$CONSTRAINT_NAME = AA.RDB$CONSTRAINT_NAME
    WHERE
      AA.RDB$CONSTRAINT_TYPE = 'FOREIGN KEY'
      AND AA.RDB$RELATION_NAME = '#{table_name.upcase}';
  SQL

  result.map do |row|
    options = {
      column: row[2].downcase,
      name: row[0].strip.downcase,
      primary_key: row[3].downcase
    }

    ActiveRecord::ConnectionAdapters::ForeignKeyDefinition.new(table_name, row[1].strip.downcase, options)
  end
end

#indexes(table_name) ⇒ Object 



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# File 'lib/active_record/connection_adapters/firebird/schema_statements.rb', line 13

def indexes(table_name)
  result = query(<<~SQL, "SCHEMA")
    SELECT
      rdb$index_name,
      rdb$unique_flag
    FROM
      rdb$indices
    WHERE
      rdb$relation_name = '#{table_name.upcase}';
  SQL

  result.map do |row|
    index_name = row[0].strip
    unique = row[1] == 1
    columns = query_values(<<~SQL, "SCHEMA")
      SELECT
        rdb$field_name
      FROM
        rdb$index_segments
      WHERE
        rdb$index_name = '#{index_name}'
      ORDER BY
        rdb$field_position
    SQL

    ActiveRecord::ConnectionAdapters::IndexDefinition.new(
      table_name.downcase,
      index_name.downcase,
      unique,
      columns.map(&:strip).map(&:downcase),
    )
  end
end

#remove_index(table_name, column, options = {}) ⇒ Object 



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# File 'lib/active_record/connection_adapters/firebird/schema_statements.rb', line 47

def remove_index(table_name, column, options = {})
  index_name = index_name_for_remove(table_name, column, options)
  execute "DROP INDEX #{quote_column_name(index_name)}"
end

#tables(_name = nil) ⇒ Object 



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# File 'lib/active_record/connection_adapters/firebird/schema_statements.rb', line 5

def tables(_name = nil)
  @connection.table_names
end

#views ⇒ Object 



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# File 'lib/active_record/connection_adapters/firebird/schema_statements.rb', line 9

def views
  @connection.view_names
end