Class: Flydata::TableDef::RedshiftTableDef
- Inherits:
-
Object
- Object
- Flydata::TableDef::RedshiftTableDef
- Defined in:
- lib/flydata/table_def/redshift_table_def.rb
Constant Summary collapse
- TYPE_MAP_F2R =
{ 'binary' => {type: 'varchar', use_params: true, default_value: ''}, 'char' => {type: 'char', use_params: true, default_value: ''}, 'date' => {type: 'date', default_value: '0000-01-01'}, 'datetime' => {type: 'timestamp', default_value: '0000-01-01'}, 'enum' => {type: 'varchar encode bytedict', default_value: ''}, 'float4' => {type: 'float4', default_value: '0'}, 'float4 unsigned' => {type: 'float4', default_value: '0'}, 'float8' => {type: 'float8', default_value: '0'}, 'float8 unsigned' => {type: 'float8', default_value: '0'}, 'int1' => {type: 'int2', default_value: '0'}, 'int1 unsigned' => {type: 'int2', unsigned: true, default_value: '0'}, 'int2' => {type: 'int2', default_value: '0'}, 'int2 unsigned' => {type: 'int4', unsigned: true, default_value: '0'}, 'int3' => {type: 'int4', default_value: '0'}, 'int3 unsigned' => {type: 'int4', unsigned: true, default_value: '0'}, 'int4' => {type: 'int4', default_value: '0'}, 'int4 unsigned' => {type: 'int8', unsigned: true, default_value: '0'}, 'int8' => {type: 'int8', default_value: '0'}, 'int8 unsigned' => {type: 'numeric(20,0)', unsigned: true, default_value: '0'}, 'numeric' => {type: 'numeric', use_params: true, max_size: [38,37], default_value: '0'}, 'numeric unsigned' => {type: 'numeric', use_params: true, max_size: [38,37], default_value: '0'}, 'text' => {type: 'varchar(max)', default_value: ''}, 'time' => {type: 'timestamp', default_value: '0000-01-01'}, 'varbinary' => {type: 'varchar', use_params: true, max_size: 65535, default_value: ''}, 'varchar' => {type: 'varchar', use_params: true, max_size: 65535, default_value: ''}, }
- FLYDATA_CTL_COLUMNS_TABLE =
"flydata_ctl_columns"
- CREATE_FLYDATA_CTL_TABLE_SQL =
<<EOS CREATE TABLE %s( id integer NOT NULL IDENTITY(1,1), table_name varchar(128) NOT NULL, column_name varchar(128) NOT NULL, src_data_type varchar(1024) NOT NULL, revision int NOT NULL DEFAULT 1, ordinal_position int NOT NULL, PRIMARY KEY(id) ) DISTKEY(table_name) SORTKEY(table_name); EOS
- CREATE_TABLE_SQL =
<<EOS DROP TABLE %s; CREATE TABLE %s ( %s ); EOS
- FLYDATA_CTL_COLUMNS_SQL =
<<EOS DELETE FROM %s WHERE table_name = '%s'; INSERT INTO %s (table_name, column_name, src_data_type, ordinal_position) VALUES EOS
Class Method Summary collapse
- .check_and_replace_max(params, max_size_a) ⇒ Object
- .column_def_sql(column, opt = {}) ⇒ Object
- .comment_sql(flydata_tabledef, schema_name) ⇒ Object
- .create_flydata_ctl_table_sql(schema_name) ⇒ Object
- .create_table_sql(flydata_tabledef, schema_name) ⇒ Object
- .escape(text) ⇒ Object
- .flydata_ctl_sql(flydata_tabledef, schema_name) ⇒ Object
- .flydata_ctl_table_for_ddl(schema_name) ⇒ Object
- .from_flydata_tabledef(flydata_tabledef, options = {}) ⇒ Object
- .primary_key_sql(flydata_tabledef) ⇒ Object
- .replace_default_value(type, default_value) ⇒ Object
- .table_name_for_ddl(table_name, schema_name) ⇒ Object
Class Method Details
.check_and_replace_max(params, max_size_a) ⇒ Object
169 170 171 172 173 174 175 176 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 169 def self.check_and_replace_max(params, max_size_a) final_params = [] params.split(",").each_with_index do |param, i| final_params << (/\d+/.match(param) && max_size_a[i] && param.to_i > max_size_a[i].to_i ? max_size_a[i] : param) end final_params.join(",") end |
.column_def_sql(column, opt = {}) ⇒ Object
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 89 def self.column_def_sql(column, opt = {}) type = column[:type] if type =~ /\((.*?)\)/ type = $` + $' params = $1 end type_info = TYPE_MAP_F2R[type] raise "Unsupported type '#{column[:type]}'" if type_info.nil? rs_type = if type_info[:use_params] && params && !params.nil? params = check_and_replace_max(params, Array(type_info[:max_size])) if type_info[:max_size] type_info[:type] + "(#{params})" else type_info[:type] end line = %Q| "#{column[:column]}" #{rs_type}| line += " NOT NULL" if column[:not_null] if (column.has_key?(:default)) val = replace_default_value(type_info[:type], column[:default]) line += " DEFAULT #{val}" elsif column[:not_null] && opt[:for] == :alter_table # Redshift doesn't allow adding a not null column without default value # Add a defalt value line += " DEFAULT '#{type_info[:default_value]}'" end # Commented out because no IDENTITY column must be used for a replicated table. # Values come from the master. # line += " IDENTITY(1, 1)" if (column[:auto_increment]) line end |
.comment_sql(flydata_tabledef, schema_name) ⇒ Object
137 138 139 140 141 142 143 144 145 146 147 148 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 137 def self.comment_sql(flydata_tabledef, schema_name) sql = "" flydata_tabledef[:columns].each do |col| next unless col[:comment] sql += <<EOS COMMENT ON COLUMN #{table_name_for_ddl(flydata_tabledef[:table_name], schema_name)}."#{col[:column]}" IS '#{col[:comment]}'; EOS end sql end |
.create_flydata_ctl_table_sql(schema_name) ⇒ Object
64 65 66 67 68 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 64 def self.create_flydata_ctl_table_sql(schema_name) # No drop table here intentionally because losing the data is fatal. tbl = flydata_ctl_table_for_ddl(schema_name) CREATE_FLYDATA_CTL_TABLE_SQL % [tbl, tbl] end |
.create_table_sql(flydata_tabledef, schema_name) ⇒ Object
77 78 79 80 81 82 83 84 85 86 87 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 77 def self.create_table_sql(flydata_tabledef, schema_name) lines = flydata_tabledef[:columns].collect{|column| column_def_sql(column) } pk_def = primary_key_sql(flydata_tabledef) lines << pk_def if pk_def contents = lines.join(",\n") table_name = flydata_tabledef[:table_name] redshift_tbl = table_name_for_ddl(table_name, schema_name) CREATE_TABLE_SQL % [redshift_tbl, redshift_tbl, contents] end |
.escape(text) ⇒ Object
165 166 167 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 165 def self.escape(text) text.gsub("'", "\\\\'") end |
.flydata_ctl_sql(flydata_tabledef, schema_name) ⇒ Object
154 155 156 157 158 159 160 161 162 163 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 154 def self.flydata_ctl_sql(flydata_tabledef, schema_name) flydata_ctl_tbl = flydata_ctl_table_for_ddl(schema_name) sql = FLYDATA_CTL_COLUMNS_SQL % [ flydata_ctl_tbl, flydata_tabledef[:table_name], flydata_ctl_tbl ] values = [] flydata_tabledef[:columns].each.with_index(1) do |col, i| values << "('#{flydata_tabledef[:table_name]}', '#{col[:column]}', '#{escape(col[:type])}', #{i})" end sql += values.join(",\n") + ';' sql end |
.flydata_ctl_table_for_ddl(schema_name) ⇒ Object
60 61 62 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 60 def self.flydata_ctl_table_for_ddl(schema_name) table_name_for_ddl(FLYDATA_CTL_COLUMNS_TABLE, schema_name) end |
.from_flydata_tabledef(flydata_tabledef, options = {}) ⇒ Object
32 33 34 35 36 37 38 39 40 41 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 32 def self.from_flydata_tabledef(flydata_tabledef, = {}) [:flydata_ctl_table] = true unless .has_key?(:flydata_ctl_table) schema_name = [:schema_name] tabledef = "" tabledef += create_flydata_ctl_table_sql(schema_name) if [:flydata_ctl_table] tabledef += create_table_sql(flydata_tabledef, schema_name) unless [:ctl_only] tabledef += comment_sql(flydata_tabledef, schema_name) unless [:ctl_only] tabledef += flydata_ctl_sql(flydata_tabledef, schema_name) end |
.primary_key_sql(flydata_tabledef) ⇒ Object
132 133 134 135 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 132 def self.primary_key_sql(flydata_tabledef) pks = flydata_tabledef[:columns].select{|col| col[:primary_key]}.collect{|col| col[:column]} pks.empty? ? nil : " PRIMARY KEY (#{pks.join(',')})" end |
.replace_default_value(type, default_value) ⇒ Object
122 123 124 125 126 127 128 129 130 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 122 def self.replace_default_value(type, default_value) val = default_value ? "'#{default_value}'" : "NULL" case type when 'timestamp' (val.upcase == "'CURRENT_TIMESTAMP'") ? 'SYSDATE' : val else val end end |
.table_name_for_ddl(table_name, schema_name) ⇒ Object
56 57 58 |
# File 'lib/flydata/table_def/redshift_table_def.rb', line 56 def self.table_name_for_ddl(table_name, schema_name) schema_name.to_s.empty? ? "\"#{table_name}\"" : "\"#{schema_name}\".\"#{table_name}\"" end |