Microsoft SQL Server-class | R Documentation |
Details of SQL Server methods for odbc and DBI generics.
dbUnquoteIdentifier()
conn@quote
returns the quotation mark, but quotation marks and square
brackets can be used interchangeably for delimited identifiers.
(https://learn.microsoft.com/en-us/sql/relational-databases/databases/database-identifiers).
This function strips the brackets first and then calls the DBI method to
strip the quotation marks.
isTempTable()
Local temp tables are stored as
[tempdb].[dbo].[#name]_____[numeric identifier]
, so isTempTable()
returns TRUE
if catalog_name
is "tempdb"
or "%"
, or the
name starts with "#"
.
dbExistsTable()
The default implementation reports temporary tables as non-existent
since they live in a different catalog. This method provides a special
case for temporary tables, as identified by isTempTable()
.
dbListTables()
The default implementation reports temporary tables as non-existent
when a catalog_name
isn't supplied since they live in a different catalog.
This method provides a special case for temporary tables.
odbcConnectionSchemas
Method for an internal function. Calls catalog-specific sp_tables
to make
sure we list the schemas in the appropriate database/catalog.
sqlCreateTable()
Warns if temporary = TRUE
but the name
does not conform to temp table
naming conventions (i.e. it doesn't start with #
).
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