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"PostgreSQL" (Data Connection)

"PostgreSQL" (Data Connection)

Details

Properties

  • DataConnectionObject[assoc] creates a reference to a data source. The source does not need to exist yet.
  • General keys typically found in assoc are:
  • "ConnectionName""PostgreSQL"
    "Location"SQL query given as a string
    "Redownload"whether to rerun the query and overwrite cached results
  • Required keys in assoc are:
  • "DatabaseName"string giving the database to access
    "Host"the host servicing the database
  • Typical keys in assoc are:
  • "Port"the server port to access the database
  • Possible forms of "Location" when connecting to a PostgreSQL database include:
  • "query"SQL query given as a string

    • Supported Types

  • BOOLEANTrue or False
    BYTEAByteArray
    DATEDateObject with day granularity
    TIMESTAMPDateObject with instant granularity and time zone support
    NUMERICReal with fixed precision
    BIGINT, INTEGER, SMALLINTInteger
    DOUBLE_PRECISION, FLOAT, REALReal
    CHAR, TEXT, VARCHARString
    TIMETimeObject

    • Account Setting & Authentication

  • Possible values for Authentication are:
  • Automaticattempt to use saved credentials or give a dialog
    "Dialog"give authentication parameters via a dialog
    SystemCredential["key"]retrieve authentication information from secure storage
    SystemCredentialData[…]stored authentication data
    assocprovide explicit credentials
  • Use the form Authentication:>SystemCredential["key"] to delay evaluating securely stored credentials.
  • The following keys are accepted by Authenticationassoc:
  • "Username"username
    "Password"password

    • Examples

    Basic Examples  (2)

    Create a DataConnectionObject to data from a PostgreSQL query:

    Retrieve the data using Import: