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textql:tldr:6bc5e
This command is used to process the contents of a file using the textql
tool. Here's an explanation of the command:
-
cat ${filename}
: Thecat
command is used to output the contents of the specified file (${filename}
represents the variable holding the file name). -
|
: This vertical bar character is a pipe symbol that is used to redirect the output of the preceding command (in this case, the file contents) to the input of the next command (textql
). -
textql -sql "${SELECT * FROM stdin}"
: Thetextql
command is a tool for executing SQL queries on plain text data. The-sql
option is used to specify an SQL query to be executed. In this case, the query is${SELECT * FROM stdin}
, where${}
is used to denote a variable (in this case, the variable represents the file contents).
Overall, the command reads the contents of a file (using cat
), redirects it to textql
, and executes an SQL query (SELECT * FROM stdin
) on that data.