Class: DbMeta::Oracle::Table

Inherits:
Base
  • Object
show all
Defined in:
lib/db_meta/oracle/types/table.rb

Constant Summary

Constants inherited from Base

Base::TYPES

Instance Attribute Summary collapse

Attributes inherited from Base

#extract_type, #name, #status, #system_object, #type

Instance Method Summary collapse

Methods inherited from Base

from_type, register_type, #system_object?

Methods included from Helper

#block, #create_folder, #pluralize, #remove_folder, #type_sequence, #write_buffer_to_file

Constructor Details

#initialize(args = {}) ⇒ Table 



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# File 'lib/db_meta/oracle/types/table.rb', line 8

def initialize(args={})
  super(args)

  @comment = nil # table level comment

  @comment = nil
  @columns = []
  @indexes = []
  @constraints = []
  @triggers = []
end

Instance Attribute Details

#cache ⇒ Object (readonly)

Returns the value of attribute cache.



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# File 'lib/db_meta/oracle/types/table.rb', line 6

def cache
  @cache
end

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/db_meta/oracle/types/table.rb', line 6

def columns
  @columns
end

#duration ⇒ Object (readonly)

Returns the value of attribute duration.



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# File 'lib/db_meta/oracle/types/table.rb', line 6

def duration
  @duration
end

#iot_type ⇒ Object (readonly)

Returns the value of attribute iot_type.



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# File 'lib/db_meta/oracle/types/table.rb', line 6

def iot_type
  @iot_type
end

#temporary ⇒ Object (readonly)

Returns the value of attribute temporary.



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# File 'lib/db_meta/oracle/types/table.rb', line 6

def temporary
  @temporary
end

Instance Method Details

#add_object(object) ⇒ Object 



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# File 'lib/db_meta/oracle/types/table.rb', line 20

def add_object(object)
  @indexes << object if object.type == 'INDEX'
  @constraints << object if object.type == 'CONSTRAINT'
  @triggers << object if object.type == 'TRIGGER'
end

#ddl_drop ⇒ Object 



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# File 'lib/db_meta/oracle/types/table.rb', line 112

def ddl_drop
  "DROP #{@type} #{@name} CASCADE CONSTRAINTS PURGE;"
end

#extract(args = {}) ⇒ Object 



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# File 'lib/db_meta/oracle/types/table.rb', line 45

def extract(args={})
  buffer = [block(@name)]
  buffer << "CREATE#{" #{@temporary}" if @temporary} TABLE #{@name}"
  buffer << '('

  # add columns
  @columns.each_with_index do |c, index|
    buffer << "  #{c.extract}#{',' if index+1 < @columns.size}"
  end

  # Primary key definition must be here for IOT tables
  if @iot_type == 'IOT'
    constraint = @constraints.select{ |c| c.constraint_type == 'PRIMARY KEY'}[0]
    buffer[-1] += ','
    buffer << "  CONSTRAINT #{constraint.name}"
    buffer << "  PRIMARY KEY (#{constraint.columns.join(', ')})"
    buffer << "  ENABLE VALIDATE"
  end

  buffer << ')'
  buffer << translate_duration if @duration.size > 0
  buffer << @cache if @temporary
  buffer << "ORGANIZATION INDEX" if @iot_type == "IOT"
  buffer[-1] += ';'
  buffer << nil

  # table comments
  if @comment
    buffer << "COMMENT ON TABLE #{@name} IS '#{@comment.text("'","''")}';"
  end

  # table column comments
  @columns.each do |column|
    next if column.comment.size == 0
    buffer << "COMMENT ON COLUMN #{@name}.#{column.name} IS '#{column.comment.gsub("'","''")}';"
  end

  # indexes
  if @indexes.size > 0
    buffer << block("Indexes", 40)
    @indexes.each do |index|
      line = ""
      line << "-- System Index: " if index.system_object? || @iot_type == "IOT"
      line << index.extract(args)
      buffer << line
    end
    buffer << nil
  end

  # constaints
  if @constraints.size > 0
    buffer << block("Constraints", 40)
    @constraints.sort_by{ |c| [ Constraint.sort_value(c.constraint_type), c.name] }.each do |constraint|
      buffer << constraint.extract(args.merge({comment: (constraint.constraint_type == 'FOREIGN KEY')}))
    end
  end

  # triggers
  if @triggers.size > 0
    buffer << block("Triggers", 40)
    buffer << @triggers.map{ |o| o.extract(args) }.join("\n")
    buffer << nil
  end

  buffer.join("\n")
end

#fetch ⇒ Object 



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# File 'lib/db_meta/oracle/types/table.rb', line 26

def fetch
  @comment = Comment.find(type: 'TABLE', name: @name)
  @columns = Column.all(object_name: @name)

  connection = Connection.instance.get
  cursor = connection.exec("select temporary, cache, iot_type, duration from user_tables where table_name = '#{@name}'")
  while row = cursor.fetch()
    @temporary = row[0].to_s.strip == 'Y' ? 'GLOBAL TEMPORARY' : nil
    @cache = row[1].to_s.strip == 'Y' ? 'CACHE' : 'NOCACHE'
    @iot_type = row[2].to_s
    @duration = row[3].to_s
  end
  cursor.close

rescue
  connection.logoff
end

#get_core_data_where_clause(id = 1000000) ⇒ Object 



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# File 'lib/db_meta/oracle/types/table.rb', line 116

def get_core_data_where_clause(id=1000000)
  buffer = []
  @constraints.each do |constraint|
    if constraint.constraint_type == 'PRIMARY KEY'
      constraint.columns.each do |column|
        buffer << "#{column} < #{id}"
      end
    end
  end

  return '' if buffer.size == 0
  buffer.insert(0, 'where')
  buffer.join(' ')
end