| PostgreSQL Tcl Interface Documentation | ||||
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pg_exec submits a command to the PostgreSQL server and returns a result. Command result handles start with the connection handle and add a period and a result number.
Note that lack of a Tcl error is not proof that the command succeeded! An error message returned by the server will be processed as a command result with failure status, not by generating a Tcl error in pg_exec. Check for {[pg_result $result -status] == PGRES_COMMAND_OK}.
If the [-paramarray] flag is provided, then a substitution is performed on the query, securely replacing each back-quote delimited name with the corresponding entry from the named array. If the array does not contain the named element, then NULL is substituted (similarly to the way an array created by -withoutnulls is generated). Each such name must occur in a location where a value or field name could appear. See pg_select for more info.
If the [-variables] flag is provided, then embedded Tcl variables are passed as parameters. Variables can be flagged with ':' and array references and namespaces are supported. Complex variable names can usually be embedded with :{nasty-name-here} though no attempt at duplicating Tcl brace-escaping is made. If the variable does not exist, then NULL is substituted.
Perform parameter substitution via `quoted` elements of the array using PQexecParams or PQSendQueryParams.
Substitute Tcl variables found in the SQL string using PQexecParams or PQSendQueryParams.
connThe handle of the connection on which to execute the command.
commandStringThe SQL command to execute.
argsFor PostgreSQL versions greater than 7.4, args consists of zero or more optional values that can be inserted, unquoted, into the SQL statement using $-style substitution. Nulls are represented by the string "NULL".