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module PgQuery
class ParserResult
def deparse
PgQuery.deparse(@tree)
end
end
# Reconstruct all of the parsed queries into their original form
def self.deparse(tree)
if PgQuery::ParseResult.method(:encode).arity == 1
PgQuery.deparse_protobuf(PgQuery::ParseResult.encode(tree)).force_encoding('UTF-8')
elsif PgQuery::ParseResult.method(:encode).arity == -1
PgQuery.deparse_protobuf(PgQuery::ParseResult.encode(tree, recursion_limit: 1_000)).force_encoding('UTF-8')
else
raise ArgumentError, 'Unsupported protobuf Ruby API'
end
end
# Convenience method for deparsing a statement of a specific type
def self.deparse_stmt(stmt)
deparse(PgQuery::ParseResult.new(version: PG_VERSION_NUM, stmts: [PgQuery::RawStmt.new(stmt: PgQuery::Node.from(stmt))]))
end
# Convenience method for deparsing an expression
def self.deparse_expr(expr)
deparse_stmt(PgQuery::SelectStmt.new(where_clause: expr, op: :SETOP_NONE)).gsub('SELECT WHERE ', '')
end
end
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