OracleSqlParser

SQL Parser for Oracle

Add this line to your application's Gemfile:

gem 'oracle-sql-parser'

And then execute:

$ bundle

Or install it yourself as:

$ gem install oracle-sql-parser

query = "select 1 from dual"
parser = OracleSqlParser::Grammar::GrammarParser.new
syntax_tree = parser.parse query
if syntax_tree.nil?
  message = "\n#{query}\n" + " " * (parser.failure_column.to_i-1) + "*\n"
  raise parser.failure_reason + message
end
ast = syntax_tree.ast

=> #<OracleSqlParser::Ast::SelectStatement {:subquery=>#<OracleSqlParser::Ast::Subquery
  :has_parenthesis => nil,
  :query_block => #<OracleSqlParser::Ast::QueryBlock
    :hint => nil,
    :modifier => nil,
    :select_list => #<OracleSqlParser::Ast::Array [
      #<OracleSqlParser::Ast::SelectColumn
        :expr => #<OracleSqlParser::Ast::NumberLiteral {:value=>"1"}>,
        :as => nil,
        :c_alias => nil}>

    ]>
    ,
    :select_sources => #<OracleSqlParser::Ast::Array [
      #<OracleSqlParser::Ast::TableReference {:schema_name=>nil, :table_name=>#<OracleSqlParser::Ast::Identifier {:name=>"dual"}>, :dblink=>nil, :subquery=>nil, :table_alias=>nil}>
    ]>
    ,
    :where_clause => nil,
    :group_by_clause => nil,
    :model_clause => nil}>
  ,
  :subqueries => nil,
  :subquery => nil,
  :order_by_clause => nil}>
, :for_update_clause=>nil}>=> nil

ast.to_sql

=> "select 1 from dual"

p = ast.to_parameterized
p.to_sql
p.params.inspect

=> "select :a0 from dual"
=> {"a0"=>#<OracleSqlParser::Ast::NumberLiteral {:value=>"1"}>}

Bug reports and pull requests are welcome on GitHub at https://github.com/jksy/sql_parser.

http://dev.jksy.org/