Class: PLSQL::OCIConnection::Cursor

Inherits:
Object
  • Object
show all
Includes:
Connection::CursorCommon
Defined in:
lib/plsql/oci_connection.rb

Overview

:nodoc:

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Connection::CursorCommon

#fetch_all, #fetch_hash, #fetch_hash_all

Constructor Details

#initialize(conn, raw_cursor) ⇒ Cursor

Returns a new instance of Cursor.



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# File 'lib/plsql/oci_connection.rb', line 78

def initialize(conn, raw_cursor)
  @connection = conn
  @raw_cursor = raw_cursor
  self.class.open_cursors.push self
end

Instance Attribute Details

#raw_cursor ⇒ Object (readonly)

Returns the value of attribute raw_cursor.



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# File 'lib/plsql/oci_connection.rb', line 71

def raw_cursor
  @raw_cursor
end

Class Method Details

.new_from_parse(conn, sql) ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 84

def self.new_from_parse(conn, sql)
  raw_cursor = conn.raw_connection.parse(sql)
  self.new(conn, raw_cursor)
end

.new_from_query(conn, sql, bindvars = [], options = {}) ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 89

def self.new_from_query(conn, sql, bindvars=[], options={})
  cursor = new_from_parse(conn, sql)
  if prefetch_rows = options[:prefetch_rows]
    cursor.prefetch_rows = prefetch_rows
  end
  cursor.exec(*bindvars)
  cursor
end

.open_cursors ⇒ Object

stack of open cursors per thread



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# File 'lib/plsql/oci_connection.rb', line 74

def self.open_cursors
  Thread.current[:plsql_oci_cursor_stack] ||= []
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 112

def [](key)
  @connection.ora_value_to_ruby_value(@raw_cursor[key])
end

#bind_param(arg, value, metadata) ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 102

def bind_param(arg, value, metadata)
  type, length = @connection.plsql_to_ruby_data_type(metadata)
  ora_value = @connection.ruby_value_to_ora_value(value, type)
  @raw_cursor.bind_param(arg, ora_value, type, length)
end

#close ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 129

def close
  # close all cursors that were created after this one
  while (open_cursor = self.class.open_cursors.pop) && !open_cursor.equal?(self)
    open_cursor.close_raw_cursor
  end
  close_raw_cursor
end

#close_raw_cursor ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 125

def close_raw_cursor
  @raw_cursor.close
end

#exec(*bindvars) ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 108

def exec(*bindvars)
  @raw_cursor.exec(*bindvars)
end

#fetch ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 116

def fetch
  row = @raw_cursor.fetch
  row && row.map{|v| @connection.ora_value_to_ruby_value(v)}
end

#fields ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 121

def fields
  @fields ||= @raw_cursor.get_col_names.map{|c| c.downcase.to_sym}
end

#prefetch_rows=(value) ⇒ Object 



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# File 'lib/plsql/oci_connection.rb', line 98

def prefetch_rows=(value)
  @raw_cursor.prefetch_rows = value
end