Class: FluentQuery::Drivers::Shared::Tokens::SQL::Set

Inherits:
FluentQuery::Drivers::Shared::Tokens::SQLToken show all
Defined in:
lib/fluent-query/drivers/shared/tokens/sql/set.rb

Overview

Generic SQL query SET token.

Constant Summary

Constants inherited from FluentQuery::Drivers::Shared::Tokens::SQLToken

FluentQuery::Drivers::Shared::Tokens::SQLToken::TRANSFORMER

Instance Method Summary collapse

Methods inherited from FluentQuery::Drivers::Shared::Tokens::SQLToken

#initialize

Constructor Details

This class inherits a constructor from FluentQuery::Drivers::Shared::Tokens::SQLToken

Instance Method Details

#render!(mode = :build) ⇒ Object 



23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
 
# File 'lib/fluent-query/drivers/shared/tokens/sql/set.rb', line 23

def render!(mode = :build)
    _class = self.unknown_token
    
    stack = [ ]
    unknown = [ ]

    operator = @_driver.quote_operator(:and)
    processor = @_query.processor
    result = "SET "

    @_subtokens.each do |token|
        arguments = token.arguments

        # SET token
        
        if token.name == :set
            length = arguments.length

            # Checks for arguments
            if length > 0
                if (length > 1) or (arguments.first.string?)
                    stack << processor.process_formatted(arguments, mode)
                elsif arguments.first.hash?
                    stack << processor.process_hash(arguments.first, ", ", :assigning)
                end
            else
                raise FluentQuery::Drivers::Exception::new("SET token expects Hash or formatted string as argument.")
            end

        # Unknown tokens renders directly
        else
            result << _class::new(@_driver, @_query, [token]).render!
        end
        
    end


    # Closes opened native token with unknown tokens
    if unknown.length > 0
        native = _class::new(@_driver, @_query, unknown)
        stack << native
        unknown = [ ]
    end

    # Process stack with results
    first = true
    
    stack.each do |item|
        if item.kind_of? _class
            result << item.render!
        elsif item.string?
            if not first
                result << operator << " "
            else
                first = false
            end
            
            result << item
        end

        result << " "
    end

    return result
end