Class: RBHive::TableSchema
- Inherits:
-
Object
- Object
- RBHive::TableSchema
- Defined in:
- lib/rbhive/table_schema.rb
Defined Under Namespace
Classes: Column
Instance Attribute Summary collapse
-
#columns ⇒ Object
readonly
Returns the value of attribute columns.
-
#name ⇒ Object
Returns the value of attribute name.
-
#partitions ⇒ Object
readonly
Returns the value of attribute partitions.
Instance Method Summary collapse
- #add_columns_statement ⇒ Object
- #column(name, type, comment = nil) ⇒ Object
- #create_table_statement ⇒ Object
- #delimited_statement ⇒ Object
-
#initialize(name, comment = nil, options = {}, &blk) ⇒ TableSchema
constructor
A new instance of TableSchema.
- #partition(name, type, comment = nil) ⇒ Object
- #replace_columns_statement ⇒ Object
- #row_format_statement ⇒ Object
- #serde(name, properties = {}) ⇒ Object
- #serde_properties_statement ⇒ Object
- #serde_statement ⇒ Object
- #to_s ⇒ Object
Constructor Details
#initialize(name, comment = nil, options = {}, &blk) ⇒ TableSchema
Returns a new instance of TableSchema.
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# File 'lib/rbhive/table_schema.rb', line 5 def initialize(name, comment=nil, ={}, &blk) @name, @comment = name, comment @location = [:location] || nil @field_sep = [:field_sep] || "\t" @line_sep = [:line_sep] || "\n" @collection_sep = [:collection_sep] || "|" @columns = [] @partitions = [] @serde_name = nil @serde_properties = {} instance_eval(&blk) if blk end |
Instance Attribute Details
#columns ⇒ Object (readonly)
Returns the value of attribute columns.
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# File 'lib/rbhive/table_schema.rb', line 4 def columns @columns end |
#name ⇒ Object
Returns the value of attribute name.
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# File 'lib/rbhive/table_schema.rb', line 3 def name @name end |
#partitions ⇒ Object (readonly)
Returns the value of attribute partitions.
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# File 'lib/rbhive/table_schema.rb', line 4 def partitions @partitions end |
Instance Method Details
#add_columns_statement ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 67 def add_columns_statement alter_columns_statement("ADD") end |
#column(name, type, comment = nil) ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 18 def column(name, type, comment=nil) @columns << Column.new(name, type, comment) end |
#create_table_statement ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 31 def create_table_statement() %[CREATE #{external}TABLE #{table_statement} ROW FORMAT #{row_format_statement} STORED AS TEXTFILE #{location}] end |
#delimited_statement ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 46 def delimited_statement %(DELIMITED FIELDS TERMINATED BY '#{@field_sep}' COLLECTION ITEMS TERMINATED BY '#{@collection_sep}' LINES TERMINATED BY '#{@line_sep}') end |
#partition(name, type, comment = nil) ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 22 def partition(name, type, comment=nil) @partitions << Column.new(name, type, comment) end |
#replace_columns_statement ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 63 def replace_columns_statement alter_columns_statement("REPLACE") end |
#row_format_statement ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 38 def row_format_statement if @serde_name serde_statement else delimited_statement end end |
#serde(name, properties = {}) ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 26 def serde(name, properties={}) @serde_name = name @serde_properties = properties end |
#serde_properties_statement ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 57 def serde_properties_statement return '' unless @serde_properties.any? kvs = @serde_properties.map { |k,v| %("#{k}" = "#{v}") }.join(",\n") %(WITH SERDEPROPERTIES (#{kvs})) end |
#serde_statement ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 53 def serde_statement %(SERDE '#{@serde_name}'\n#{serde_properties_statement}) end |
#to_s ⇒ Object
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# File 'lib/rbhive/table_schema.rb', line 71 def to_s table_statement end |