edbColnames.RODBC_MySQL: Retrieve column names of a table in a MySQL database...
In easyrodbcmysql: Simple Database Interface for MySQL
Description
Usage
Arguments
Value
Author(s)
See Also
Examples
Description
Retrieve column names of a table in a MySQL database
(referenced by 'edb'). Wrapper around RODBC::sqlColumns().
Notice that the method does NOT retrieve the full table to
get its column names (so it should work even if the table is big).
Usage
1
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3
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5
Arguments
edb
An object of class 'edb', such as returned by edb.
tableName
Single character string. Name of the table to read in 'edb'.
onlyNames
Single logical. If TRUE only returns the column names (vector),
and if FALSE returns a detailed table as in
sqlColumns.
...
Additional parameters to be passed to dbListFields(). See
?dbListFields.
Value
The function returns a vector of character strings with the
columns / fields of the original MySQL table, or a table with
full details on the columns (see onlyNames).
Author(s)
Julien MOEYS <Julien.Moeys@mark.slu.se>
See Also
Examples
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library( "easyrodbcmysql" )
testMySQL <- FALSE # Set to TRUE to run some tests
# after modifying the edb() part below
# with your own database setting
### Windows only:
if( (Sys.info()[[ "sysname" ]] == "Windows") & testMySQL ){
### Describe the database (NB: this is not a connection)
myDb <- edb(
dbType = "RODBC_MySQL",
dbSourceName = "nameOfODBCSource", # or any name you like
dbName = "nameOfDatabase",
dbLogin = "yourUserName",
dbPwd = "yourPassword",
dbHost = "127.0.0.1",
dbPort = 3306
) #
### Register the data source in ODBC
edbDataSource( myDb, verbose = TRUE )
### Use the database:
# List the column names in a table:
edbColnames( edb = myDb, tableName = "WRB_SOIL_GROUP" )
# More details:
edbColnames(
edb = myDb,
tableName = "WRB_SOIL_GROUP",
onlyNames = FALSE # different too!
) #
### Un-register the data source in ODBC (windows only)
edbDataSource( myDb, trash = TRUE )
} #
easyrodbcmysql documentation built on May 2, 2019, 5:51 p.m.
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Description Usage Arguments Value Author(s) See Also Examples
Description
Retrieve column names of a table in a MySQL database
(referenced by 'edb'). Wrapper around RODBC::sqlColumns().
Notice that the method does NOT retrieve the full table to
get its column names (so it should work even if the table is big).
Usage
1 2 3 4 5 |
Arguments
edb |
An object of class 'edb', such as returned by |
tableName |
Single character string. Name of the table to read in 'edb'. |
onlyNames |
Single logical. If TRUE only returns the column names (vector), and if FALSE returns a detailed table as in
|
... |
Additional parameters to be passed to dbListFields(). See
|
Value
The function returns a vector of character strings with the
columns / fields of the original MySQL table, or a table with
full details on the columns (see onlyNames).
Author(s)
Julien MOEYS <Julien.Moeys@mark.slu.se>
See Also
Examples
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | library( "easyrodbcmysql" )
testMySQL <- FALSE # Set to TRUE to run some tests
# after modifying the edb() part below
# with your own database setting
### Windows only:
if( (Sys.info()[[ "sysname" ]] == "Windows") & testMySQL ){
### Describe the database (NB: this is not a connection)
myDb <- edb(
dbType = "RODBC_MySQL",
dbSourceName = "nameOfODBCSource", # or any name you like
dbName = "nameOfDatabase",
dbLogin = "yourUserName",
dbPwd = "yourPassword",
dbHost = "127.0.0.1",
dbPort = 3306
) #
### Register the data source in ODBC
edbDataSource( myDb, verbose = TRUE )
### Use the database:
# List the column names in a table:
edbColnames( edb = myDb, tableName = "WRB_SOIL_GROUP" )
# More details:
edbColnames(
edb = myDb,
tableName = "WRB_SOIL_GROUP",
onlyNames = FALSE # different too!
) #
### Un-register the data source in ODBC (windows only)
edbDataSource( myDb, trash = TRUE )
} #
|
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Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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