kdb system Functions
kdb provides the following system commands:
System Commands:
| sym | description |
|---|---|
| \ | Exit q session |
| Toggle q/k language or exit debug mode | |
| _ | Compile q script (hide source) |
| * | Execute OS command |
| 1 | Redirect standard out to file |
| 2 | Redirect standard error to file |
| a | List tables in namespace. No parameter means current NS |
| b | List dependencies in NS. No parameter means current NS |
| B | Invalid dependencies in NS. No parameter means current NS |
| c | Return/set console height & width -c H W 23 79 |
| C | Return/set web browser display height & width -C H W 36 2000 |
| d | Return/set current namespace `. |
| e | Return/set error trap mode -e [0|1] 0 |
| f | List functions in NS. No parameter means current NS |
| l | Load q script or database directory |
| o | Return/set local time offset in hours from GMT -o N 0N |
| p | Return/set port used \p portNumber . Note 0=no listening socket. |
| P | Return/set print precision. 0 = maximum -P N 7 |
| r | Display replication (host;port); OR oldfile newfile /- Rename a file |
| s | Display number of slaves used for parallel execution -s N 0 |
| S | Display/set seed for pseudo-random number generator -S N -314159 |
| t | Display/set timer in milliseconds. 0=timer off -t N 0 |
| ts | time and space measuring of function call |
| T | Display/set timeout (secs) for single client call. 0=off -T N 0 |
| u | Reload user:password file -u F |
| v | Display list of variables in current namespace |
| w | Workspace memory (used/heap/peak/max/mapped); OR 0 /- print internalised symbol count and memory usage |
| W | Display/set weekday offset. 0 = Saturday -W N 2 |
| x | .z.?? Reset .z function |
| z | Display/set date conversion format from string -z [0|1] 0 |
