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# Database import/export
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import copy
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import operator
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import warnings
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import exc
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import dicts
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import sql
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import sql_gen
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import strings
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import util
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##### Exceptions
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# Can't use built-in SyntaxError because it stringifies to only the first line
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class SyntaxError(Exception): pass
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##### Data cleanup
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null_strs = ['', r'\N', 'NULL', 'UNKNOWN']
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def cleanup_table(db, table):
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table = sql_gen.as_Table(table)
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cols = [sql_gen.as_Col(c, table) for c in sql.table_cols(db, table)]
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cols = filter(lambda c: sql_gen.is_text_col(db, c), cols)
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expr = 'trim(both from %s)'
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for null in null_strs: expr = 'nullif('+expr+', '+db.esc_value(null)+')'
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changes = [(v, sql_gen.CustomCode(expr % v.to_str(db))) for v in cols]
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while True:
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try:
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sql.update(db, table, changes, in_place=True, recover=True)
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break # successful
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except sql.NullValueException, e:
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db.log_debug('Caught exception: '+exc.str_(e))
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col, = e.cols
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sql.drop_not_null(db, col)
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##### Error tracking
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def track_data_error(db, errors_table, cols, value, error_code, error):
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'''
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@param errors_table If None, does nothing.
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'''
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if errors_table == None or cols == (): return
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for col in cols:
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try:
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sql.insert(db, errors_table, dict(column=col.name, value=value,
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error_code=error_code, error=error), recover=True,
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cacheable=True, log_level=4)
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except sql.DuplicateKeyException: pass
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class ExcToErrorsTable(sql_gen.ExcToWarning):
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'''Handles an exception by saving it or converting it to a warning.'''
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def __init__(self, return_, srcs, errors_table, value=None):
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'''
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@param return_ See sql_gen.ExcToWarning
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@param srcs The column names for the errors table
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@param errors_table None|sql_gen.Table
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@param value The value (or an expression for it) that caused the error
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@pre The invalid value must be in a local variable "value" of type text.
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'''
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sql_gen.ExcToWarning.__init__(self, return_)
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value = sql_gen.as_Code(value)
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self.srcs = srcs
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self.errors_table = errors_table
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self.value = value
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def to_str(self, db):
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if not self.srcs or self.errors_table == None:
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return sql_gen.ExcToWarning.to_str(self, db)
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errors_table_cols = map(sql_gen.Col,
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['column', 'value', 'error_code', 'error'])
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col_names_query = sql.mk_select(db, sql_gen.NamedValues('c', None,
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[[c.name] for c in self.srcs]), order_by=None)
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insert_query = sql.mk_insert_select(db, self.errors_table,
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errors_table_cols,
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sql_gen.Values(errors_table_cols).to_str(db))+';\n'
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return '''\
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-- Save error in errors table.
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DECLARE
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error_code text := SQLSTATE;
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error text := SQLERRM;
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value text := '''+self.value.to_str(db)+''';
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"column" text;
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BEGIN
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-- Insert the value and error for *each* source column.
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'''+strings.indent(sql_gen.RowExcIgnore(None, col_names_query, insert_query,
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row_var=errors_table_cols[0]).to_str(db))+'''
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END;
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'''+self.return_.to_str(db)
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def data_exception_handler(*args, **kw_args):
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'''Handles a data_exception by saving it or converting it to a warning.
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For params, see ExcToErrorsTable().
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'''
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return sql_gen.data_exception_handler(ExcToErrorsTable(*args, **kw_args))
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def cast(db, type_, col, errors_table=None):
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'''Casts an (unrenamed) column or value.
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If errors_table set and col has srcs, saves errors in errors_table (using
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col's srcs attr as source columns). Otherwise, converts errors to warnings.
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@param col str|sql_gen.Col|sql_gen.Literal
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@param errors_table None|sql_gen.Table|str
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'''
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col = sql_gen.as_Col(col)
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# Don't convert exceptions to warnings for user-supplied constants
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if isinstance(col, sql_gen.Literal): return sql_gen.Cast(type_, col)
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assert not isinstance(col, sql_gen.NamedCol)
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function_name = strings.first_word(type_)
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srcs = col.srcs
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save_errors = errors_table != None and srcs
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if save_errors: # function will be unique for the given srcs
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function_name = strings.ustr(sql_gen.FunctionCall(function_name,
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*map(sql_gen.to_name_only_col, srcs)))
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function = db.TempFunction(function_name)
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# Create function definition
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modifiers = 'STRICT'
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if not save_errors: modifiers = 'IMMUTABLE '+modifiers
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value_param = sql_gen.FunctionParam('value', 'text')
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handler = data_exception_handler('RETURN NULL;\n', srcs, errors_table,
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value_param.name)
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body = sql_gen.CustomCode(handler.to_str(db, '''\
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/* The explicit cast to the return type is needed to make the cast happen
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inside the try block. (Implicit casts to the return type happen at the end
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of the function, outside any block.) */
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RETURN value::'''+type_+''';
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'''))
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body.lang='plpgsql'
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sql.define_func(db, sql_gen.FunctionDef(function, type_, body,
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[value_param], modifiers))
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return sql_gen.FunctionCall(function, col)
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def func_wrapper_exception_handler(db, return_, args, errors_table):
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'''Handles a function call's data_exceptions.
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Supports PL/Python functions.
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@param return_ See data_exception_handler()
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@param args [arg...] Function call's args
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@param errors_table See data_exception_handler()
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'''
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args = filter(sql_gen.has_srcs, args)
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srcs = sql_gen.cross_join_srcs(args)
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value = sql_gen.merge_not_null(db, ',', args)
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return sql_gen.NestedExcHandler(
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data_exception_handler(return_, srcs, errors_table, value)
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, sql_gen.plpythonu_error_handler
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)
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def cast_temp_col(db, type_, col, errors_table=None):
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'''Like cast(), but creates a new column with the cast values if the input
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is a column.
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@return The new column or cast value
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'''
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def cast_(col): return cast(db, type_, col, errors_table)
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try: col = sql_gen.underlying_col(col)
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except sql_gen.NoUnderlyingTableException: return sql_gen.wrap(cast_, col)
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table = col.table
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new_col = sql_gen.suffixed_col(col, '::'+strings.first_word(type_))
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expr = cast_(col)
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# Add column
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new_typed_col = sql_gen.TypedCol(new_col.name, type_)
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sql.add_col(db, table, new_typed_col, comment=strings.urepr(col)+'::'+type_)
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new_col.name = new_typed_col.name # propagate any renaming
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sql.update(db, table, [(new_col, expr)], in_place=True, recover=True)
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return new_col
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def errors_table(db, table, if_exists=True):
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'''
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@param if_exists If set, returns None if the errors table doesn't exist
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@return None|sql_gen.Table
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'''
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table = sql_gen.as_Table(table)
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if table.srcs != (): table = table.srcs[0]
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errors_table = sql_gen.suffixed_table(table, '.errors')
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if if_exists and not sql.table_exists(db, errors_table): return None
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return errors_table
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def mk_errors_table(db, table):
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errors_table_ = errors_table(db, table, if_exists=False)
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if sql.table_exists(db, errors_table_): return
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typed_cols = [
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sql_gen.TypedCol('column', 'text', nullable=False),
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sql_gen.TypedCol('value', 'text'),
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sql_gen.TypedCol('error_code', 'character varying(5)', nullable=False),
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sql_gen.TypedCol('error', 'text', nullable=False),
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]
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sql.create_table(db, errors_table_, typed_cols, has_pkey=False)
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index_cols = ['column', 'value', 'error_code', 'error']
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sql.add_index(db, index_cols, errors_table_, unique=True)
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##### Import
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def put(db, table, row, pkey_=None, row_ct_ref=None):
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'''Recovers from errors.
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Only works under PostgreSQL (uses INSERT RETURNING).
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'''
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return put_table(db, table, [], row, row_ct_ref)
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def get(db, table, row, pkey, row_ct_ref=None, create=False):
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'''Recovers from errors'''
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try:
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return sql.value(sql.select(db, table, [pkey], row, limit=1,
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recover=True))
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except StopIteration:
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if not create: raise
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return put(db, table, row, pkey, row_ct_ref) # insert new row
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def is_func_result(col):
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return col.table.name.find('(') >= 0 and col.name == 'result'
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def into_table_name(out_table, in_tables0, mapping, is_func):
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def in_col_str(in_col):
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in_col = sql_gen.remove_col_rename(in_col)
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if isinstance(in_col, sql_gen.Col):
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table = in_col.table
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if table == in_tables0:
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in_col = sql_gen.to_name_only_col(in_col)
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elif is_func_result(in_col): in_col = table # omit col name
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return strings.ustr(in_col)
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str_ = strings.ustr(out_table)
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if is_func:
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str_ += '('
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try: value_in_col = mapping['value']
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except KeyError:
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str_ += ', '.join((strings.ustr(k)+'='+in_col_str(v)
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for k, v in mapping.iteritems()))
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else: str_ += in_col_str(value_in_col)
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str_ += ')'
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else:
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out_col = 'rank'
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try: in_col = mapping[out_col]
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except KeyError: str_ += '_pkeys'
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else: # has a rank column, so hierarchical
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str_ += '['+strings.ustr(out_col)+'='+in_col_str(in_col)+']'
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return str_
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def put_table(db, out_table, in_tables, mapping, row_ct_ref=None, default=None,
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col_defaults={}, on_error=exc.reraise):
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'''Recovers from errors.
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Only works under PostgreSQL (uses INSERT RETURNING).
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IMPORTANT: Must be run at the *beginning* of a transaction.
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@param in_tables The main input table to select from, followed by a list of
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tables to join with it using the main input table's pkey
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@param mapping dict(out_table_col=in_table_col, ...)
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* out_table_col: str (*not* sql_gen.Col)
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* in_table_col: sql_gen.Col|literal-value
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@param default The *output* column to use as the pkey for missing rows.
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If this output column does not exist in the mapping, uses None.
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@param col_defaults Default values for required columns.
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@return sql_gen.Col Where the output pkeys are made available
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'''
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import psycopg2.extensions
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out_table = sql_gen.as_Table(out_table)
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def log_debug(msg): db.log_debug(msg, level=1.5)
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def col_ustr(str_):
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return strings.repr_no_u(sql_gen.remove_col_rename(str_))
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log_debug('********** New iteration **********')
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log_debug('Inserting these input columns into '+strings.as_tt(
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out_table.to_str(db))+':\n'+strings.as_table(mapping, ustr=col_ustr))
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is_function = sql.function_exists(db, out_table)
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if is_function: out_pkey = 'result'
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else: out_pkey = sql.pkey(db, out_table, recover=True)
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out_pkey_col = sql_gen.as_Col(out_pkey, out_table)
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293
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in_tables_ = in_tables[:] # don't modify input!
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try: in_tables0 = in_tables_.pop(0) # first table is separate
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except IndexError: in_tables0 = None
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else:
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in_pkey = sql.pkey(db, in_tables0, recover=True)
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in_pkey_col = sql_gen.as_Col(in_pkey, in_tables0)
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300
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# Determine if can use optimization for only literal values
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is_literals = not reduce(operator.or_, map(sql_gen.is_table_col,
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mapping.values()), False)
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is_literals_or_function = is_literals or is_function
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if in_tables0 == None: errors_table_ = None
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else: errors_table_ = errors_table(db, in_tables0)
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308
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# Create input joins from list of input tables
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input_joins = [in_tables0]+[sql_gen.Join(v,
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{in_pkey: sql_gen.join_same_not_null}) for v in in_tables_]
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311
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312
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if mapping == {} and not is_function: # need >= one column for INSERT SELECT
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mapping = {out_pkey: None} # ColDict will replace with default value
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314
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315
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if not is_literals:
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into = sql_gen.as_Table(into_table_name(out_table, in_tables0, mapping,
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is_function))
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# Ensure into's out_pkey is different from in_pkey by prepending table
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into_out_pkey = strings.ustr(out_pkey_col)
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321
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# Set column sources
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in_cols = filter(sql_gen.is_table_col, mapping.values())
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for col in in_cols:
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if col.table == in_tables0: col.set_srcs(sql_gen.src_self)
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325
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326
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log_debug('Joining together input tables into temp table')
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327
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# Place in new table so don't modify input and for speed
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in_table = sql_gen.Table('in')
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mapping = dicts.join(mapping, sql.flatten(db, in_table, input_joins,
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in_cols, preserve=[in_pkey_col]))
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input_joins = [in_table]
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db.log_debug('Temp table: '+strings.as_tt(in_table.to_str(db)), level=2)
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333
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334
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# Wrap mapping in a sql_gen.ColDict.
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# sql_gen.ColDict sanitizes both keys and values passed into it.
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# Do after applying dicts.join() because that returns a plain dict.
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337
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mapping = sql_gen.ColDict(db, out_table, mapping)
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338
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|
339
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# Resolve default value column
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340
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if default != None:
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341
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try: default = mapping[default]
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except KeyError:
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343
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db.log_debug('Default value column '
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+strings.as_tt(strings.repr_no_u(default))
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345
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+' does not exist in mapping, falling back to None', level=2.1)
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346
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default = None
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347
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|
348
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# Save default values for all rows since in_table may have rows deleted
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349
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if is_literals: pass
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350
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elif is_function: full_in_table = in_table
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351
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else:
|
352
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full_in_table = sql_gen.suffixed_table(in_table, '_full')
|
353
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full_in_table_cols = [in_pkey_col]
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if default != None:
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full_in_table_cols.append(default)
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default = sql_gen.with_table(default, full_in_table)
|
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sql.run_query_into(db, sql.mk_select(db, in_table, full_in_table_cols,
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order_by=None), into=full_in_table, add_pkey_=True)
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359
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|
360
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pkeys_table_exists_ref = [False]
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361
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def insert_into_pkeys(joins, cols=None, limit=None, **kw_args):
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362
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query = sql.mk_select(db, joins, cols, order_by=None, limit=limit)
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363
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if pkeys_table_exists_ref[0]:
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364
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sql.insert_select(db, into, [in_pkey, into_out_pkey], query,
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365
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**kw_args)
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else:
|
367
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sql.run_query_into(db, query, into=into, add_pkey_=True, **kw_args)
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368
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pkeys_table_exists_ref[0] = True
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369
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|
370
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limit_ref = [None]
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371
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def mk_main_select(joins, cols):
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372
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return sql.mk_select(db, joins, cols, limit=limit_ref[0], order_by=None)
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373
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|
374
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if is_literals: insert_in_table = None
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else:
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376
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insert_in_table = in_table
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377
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insert_in_tables = [insert_in_table]
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378
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join_cols = sql_gen.ColDict(db, out_table)
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379
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|
380
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exc_strs = set()
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381
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def log_exc(e):
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382
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e_str = exc.str_(e, first_line_only=True)
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383
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log_debug('Caught exception: '+e_str)
|
384
|
if e_str in exc_strs: # avoid infinite loops
|
385
|
log_debug('Exception already seen, handler broken')
|
386
|
on_error(e)
|
387
|
remove_all_rows()
|
388
|
else: exc_strs.add(e_str)
|
389
|
|
390
|
def remove_all_rows():
|
391
|
log_debug('Ignoring all rows')
|
392
|
limit_ref[0] = 0 # just create an empty pkeys table
|
393
|
|
394
|
def ignore_cond(cond, e):
|
395
|
if is_literals: remove_all_rows()
|
396
|
else:
|
397
|
out_table_cols = sql_gen.ColDict(db, out_table)
|
398
|
out_table_cols.update(util.dict_subset_right_join({},
|
399
|
sql.table_cols(db, out_table)))
|
400
|
|
401
|
in_cols = []
|
402
|
cond = sql.map_expr(db, cond, mapping, in_cols)
|
403
|
cond = sql.map_expr(db, cond, out_table_cols)
|
404
|
|
405
|
track_data_error(db, errors_table_, sql_gen.cols_srcs(in_cols),
|
406
|
None, e.cause.pgcode,
|
407
|
strings.ensure_newl(e.cause.pgerror)+'condition: '+cond)
|
408
|
|
409
|
not_cond = sql_gen.NotCond(sql_gen.CustomCode(cond))
|
410
|
log_debug('Ignoring rows where '+strings.as_tt(not_cond.to_str(db)))
|
411
|
sql.delete(db, insert_in_table, not_cond)
|
412
|
|
413
|
not_null_cols = set()
|
414
|
def ignore(in_col, value, e):
|
415
|
if sql_gen.is_table_col(in_col):
|
416
|
in_col = sql_gen.with_table(in_col, insert_in_table)
|
417
|
|
418
|
track_data_error(db, errors_table_, in_col.srcs, value,
|
419
|
e.cause.pgcode, e.cause.pgerror)
|
420
|
|
421
|
sql.add_index(db, in_col, insert_in_table) # enable fast filtering
|
422
|
if value != None and in_col not in not_null_cols:
|
423
|
log_debug('Replacing invalid value '
|
424
|
+strings.as_tt(strings.urepr(value))+' with NULL in column '
|
425
|
+strings.as_tt(in_col.to_str(db)))
|
426
|
sql.update(db, insert_in_table, [(in_col, None)],
|
427
|
sql_gen.ColValueCond(in_col, value))
|
428
|
else:
|
429
|
log_debug('Ignoring rows with '+strings.as_tt(in_col.to_str(db))
|
430
|
+' = '+strings.as_tt(strings.urepr(value)))
|
431
|
sql.delete(db, insert_in_table,
|
432
|
sql_gen.ColValueCond(in_col, value))
|
433
|
if value == None: not_null_cols.add(in_col)
|
434
|
else:
|
435
|
assert isinstance(in_col, sql_gen.NamedCol)
|
436
|
in_value = sql_gen.remove_col_rename(in_col)
|
437
|
assert sql_gen.is_literal(in_value)
|
438
|
if value == in_value.value:
|
439
|
if value != None:
|
440
|
log_debug('Replacing invalid literal '
|
441
|
+strings.as_tt(in_col.to_str(db))+' with NULL')
|
442
|
mapping[in_col.name] = None
|
443
|
else:
|
444
|
remove_all_rows()
|
445
|
# otherwise, all columns were being ignore()d because the specific
|
446
|
# column couldn't be identified, and this was not the invalid column
|
447
|
|
448
|
if not is_literals:
|
449
|
def insert_pkeys_table(which):
|
450
|
return sql_gen.Table(sql_gen.concat(in_table.name,
|
451
|
'_insert_'+which+'_pkeys'))
|
452
|
insert_out_pkeys = insert_pkeys_table('out')
|
453
|
insert_in_pkeys = insert_pkeys_table('in')
|
454
|
|
455
|
def mk_func_call():
|
456
|
args = dict(((k.name, v) for k, v in mapping.iteritems()))
|
457
|
return sql_gen.FunctionCall(out_table, **args), args
|
458
|
|
459
|
if is_function and not is_literals:
|
460
|
log_debug('Defining wrapper function')
|
461
|
|
462
|
func_call, args = mk_func_call()
|
463
|
func_call = sql_gen.NamedCol(into_out_pkey, func_call)
|
464
|
|
465
|
# Create empty pkeys table so its row type can be used
|
466
|
insert_into_pkeys(input_joins, [in_pkey_col, func_call], limit=0,
|
467
|
recover=True)
|
468
|
result_type = db.col_info(sql_gen.Col(into_out_pkey, into)).type
|
469
|
|
470
|
## Create error handling wrapper function
|
471
|
|
472
|
wrapper = db.TempFunction(sql_gen.concat(into.name, '_wrap'))
|
473
|
|
474
|
select_cols = [in_pkey_col]+args.values()
|
475
|
row_var = copy.copy(sql_gen.row_var)
|
476
|
row_var.set_srcs([in_table])
|
477
|
in_pkey_var = sql_gen.Col(in_pkey, row_var)
|
478
|
|
479
|
args = dict(((k, sql_gen.with_table(v, row_var))
|
480
|
for k, v in args.iteritems()))
|
481
|
func_call = sql_gen.FunctionCall(out_table, **args)
|
482
|
|
483
|
def mk_return(result):
|
484
|
return sql_gen.ReturnQuery(sql.mk_select(db,
|
485
|
fields=[in_pkey_var, result], explain=False))
|
486
|
exc_handler = func_wrapper_exception_handler(db,
|
487
|
mk_return(sql_gen.Cast(result_type, None)), args.values(),
|
488
|
errors_table_)
|
489
|
|
490
|
sql.define_func(db, sql_gen.FunctionDef(wrapper, sql_gen.SetOf(into),
|
491
|
sql_gen.RowExcIgnore(sql_gen.RowType(in_table),
|
492
|
sql.mk_select(db, input_joins, order_by=None),
|
493
|
mk_return(func_call), exc_handler=exc_handler)
|
494
|
))
|
495
|
wrapper_table = sql_gen.FunctionCall(wrapper)
|
496
|
|
497
|
# Do inserts and selects
|
498
|
while True:
|
499
|
has_joins = join_cols != {}
|
500
|
|
501
|
# Handle unrecoverable errors in a special case
|
502
|
if limit_ref[0] == 0:
|
503
|
if is_literals or default == None:
|
504
|
default = sql_gen.remove_col_rename(default)
|
505
|
log_debug('Returning default: '
|
506
|
+strings.as_tt(strings.urepr(default)))
|
507
|
return default
|
508
|
elif is_function: pass # empty pkeys table already created
|
509
|
else:
|
510
|
log_debug('Creating an empty output pkeys table')
|
511
|
has_joins = False # use the no-joins case
|
512
|
cur = sql.run_query_into(db, sql.mk_select(db, out_table,
|
513
|
[out_pkey], order_by=None, limit=0), into=insert_out_pkeys)
|
514
|
|
515
|
break # don't do main case
|
516
|
|
517
|
# Prepare to insert new rows
|
518
|
if is_function:
|
519
|
log_debug('Calling function on input rows')
|
520
|
if is_literals: func_call, args = mk_func_call()
|
521
|
else:
|
522
|
log_debug('Trying to insert new rows')
|
523
|
insert_args = dict(recover=True, cacheable=False)
|
524
|
if has_joins:
|
525
|
insert_args.update(dict(ignore=True))
|
526
|
else:
|
527
|
insert_args.update(dict(returning=out_pkey))
|
528
|
if not is_literals:
|
529
|
insert_args.update(dict(into=insert_out_pkeys))
|
530
|
main_select = mk_main_select([insert_in_table], [sql_gen.with_table(
|
531
|
c, insert_in_table) for c in mapping.values()])
|
532
|
|
533
|
try:
|
534
|
cur = None
|
535
|
if is_function:
|
536
|
if is_literals:
|
537
|
cur = sql.select(db, fields=[func_call], recover=True,
|
538
|
cacheable=True)
|
539
|
else: insert_into_pkeys(wrapper_table, recover=True)
|
540
|
else:
|
541
|
cur = sql.insert_select(db, out_table, mapping.keys(),
|
542
|
main_select, **insert_args)
|
543
|
break # insert successful
|
544
|
except sql.MissingCastException, e:
|
545
|
log_exc(e)
|
546
|
|
547
|
type_ = e.type
|
548
|
if e.col == None: out_cols = mapping.keys()
|
549
|
else: out_cols = [e.col]
|
550
|
|
551
|
for out_col in out_cols:
|
552
|
log_debug('Casting '+strings.as_tt(strings.repr_no_u(out_col))
|
553
|
+' input to '+strings.as_tt(type_))
|
554
|
in_col = mapping[out_col]
|
555
|
while True:
|
556
|
try:
|
557
|
mapping[out_col] = cast_temp_col(db, type_, in_col,
|
558
|
errors_table_)
|
559
|
break # cast successful
|
560
|
except sql.InvalidValueException, e:
|
561
|
log_exc(e)
|
562
|
|
563
|
ignore(in_col, e.value, e)
|
564
|
except sql.DuplicateKeyException, e:
|
565
|
log_exc(e)
|
566
|
|
567
|
# Different rows violating different unique constraints not
|
568
|
# supported
|
569
|
assert not join_cols
|
570
|
|
571
|
join_cols.update(util.dict_subset_right_join(mapping, e.cols))
|
572
|
log_debug('Ignoring existing rows, comparing on these columns:\n'
|
573
|
+strings.as_inline_table(join_cols, ustr=col_ustr))
|
574
|
|
575
|
if is_literals:
|
576
|
return sql.value(sql.select(db, out_table, [out_pkey_col],
|
577
|
join_cols, order_by=None))
|
578
|
|
579
|
# Uniquify input table to avoid internal duplicate keys
|
580
|
insert_in_table = sql.distinct_table(db, insert_in_table,
|
581
|
join_cols.values())
|
582
|
insert_in_tables.append(insert_in_table)
|
583
|
except sql.NullValueException, e:
|
584
|
log_exc(e)
|
585
|
|
586
|
out_col, = e.cols
|
587
|
try: in_col = mapping[out_col]
|
588
|
except KeyError, e:
|
589
|
try: in_col = mapping[out_col] = col_defaults[out_col]
|
590
|
except KeyError:
|
591
|
msg = 'Missing mapping for NOT NULL column '+out_col
|
592
|
log_debug(msg)
|
593
|
if default == None: warnings.warn(UserWarning(msg))
|
594
|
# not an error because sometimes the mappings include
|
595
|
# extra tables which aren't used by the dataset
|
596
|
remove_all_rows()
|
597
|
else: ignore(in_col, None, e)
|
598
|
except sql.CheckException, e:
|
599
|
log_exc(e)
|
600
|
|
601
|
ignore_cond(e.cond, e)
|
602
|
except sql.InvalidValueException, e:
|
603
|
log_exc(e)
|
604
|
|
605
|
for in_col in mapping.values(): ignore(in_col, e.value, e)
|
606
|
except psycopg2.extensions.TransactionRollbackError, e:
|
607
|
log_exc(e)
|
608
|
# retry
|
609
|
except sql.DatabaseErrors, e:
|
610
|
log_exc(e)
|
611
|
|
612
|
log_debug('No handler for exception')
|
613
|
on_error(e)
|
614
|
remove_all_rows()
|
615
|
# after exception handled, rerun loop with additional constraints
|
616
|
|
617
|
if cur != None and row_ct_ref != None and cur.rowcount >= 0:
|
618
|
row_ct_ref[0] += cur.rowcount
|
619
|
|
620
|
if is_literals: return sql.value(cur)
|
621
|
|
622
|
if is_function: pass # pkeys table already created
|
623
|
elif has_joins:
|
624
|
select_joins = input_joins+[sql_gen.Join(out_table, join_cols)]
|
625
|
log_debug('Getting output table pkeys of existing/inserted rows')
|
626
|
insert_into_pkeys(select_joins, [in_pkey_col,
|
627
|
sql_gen.NamedCol(into_out_pkey, out_pkey_col)])
|
628
|
else:
|
629
|
sql.add_row_num(db, insert_out_pkeys) # for joining with input pkeys
|
630
|
|
631
|
log_debug('Getting input table pkeys of inserted rows')
|
632
|
# Note that mk_main_select() does not use ORDER BY. Instead, assume that
|
633
|
# since the SELECT query is identical to the one used in INSERT SELECT,
|
634
|
# its rows will be retrieved in the same order.
|
635
|
sql.run_query_into(db, mk_main_select(input_joins, [in_pkey]),
|
636
|
into=insert_in_pkeys)
|
637
|
sql.add_row_num(db, insert_in_pkeys) # for joining with output pkeys
|
638
|
|
639
|
assert sql.table_row_count(db, insert_out_pkeys) == sql.table_row_count(
|
640
|
db, insert_in_pkeys)
|
641
|
|
642
|
log_debug('Combining output and input pkeys in inserted order')
|
643
|
pkey_joins = [insert_in_pkeys, sql_gen.Join(insert_out_pkeys,
|
644
|
{sql.row_num_col: sql_gen.join_same_not_null})]
|
645
|
in_col = sql_gen.Col(in_pkey, insert_in_pkeys)
|
646
|
out_col = sql_gen.NamedCol(into_out_pkey,
|
647
|
sql_gen.Col(out_pkey, insert_out_pkeys))
|
648
|
insert_into_pkeys(pkey_joins, [in_col, out_col])
|
649
|
|
650
|
sql.empty_temp(db, [insert_out_pkeys, insert_in_pkeys])
|
651
|
|
652
|
if limit_ref[0] == 0 or not is_function: # is_function doesn't leave holes
|
653
|
log_debug('Setting pkeys of missing rows to '
|
654
|
+strings.as_tt(strings.urepr(default)))
|
655
|
missing_rows_joins = [full_in_table, sql_gen.Join(into,
|
656
|
{in_pkey: sql_gen.join_same_not_null}, sql_gen.filter_out)]
|
657
|
# must use join_same_not_null or query will take forever
|
658
|
insert_into_pkeys(missing_rows_joins,
|
659
|
[sql_gen.Col(in_pkey, full_in_table),
|
660
|
sql_gen.NamedCol(into_out_pkey, default)])
|
661
|
# otherwise, there is already an entry for every row
|
662
|
|
663
|
assert (sql.table_row_count(db, into)
|
664
|
== sql.table_row_count(db, full_in_table))
|
665
|
|
666
|
sql.empty_temp(db, insert_in_tables+[full_in_table])
|
667
|
|
668
|
srcs = []
|
669
|
if is_function: srcs = sql_gen.cols_srcs(in_cols)
|
670
|
return sql_gen.Col(into_out_pkey, into, srcs)
|