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Add the ".limit" command to the command-line shell.

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FossilOrigin-Name: 803cb60e75e0b09a526eefec11139cb3e8ae8c7c
This commit is contained in:
drh
2015-05-02 17:40:23 +00:00
parent 36b948f88a
commit 1a51337af8
3 changed files with 66 additions and 8 deletions
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58
src/shell.c
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@@ -1793,6 +1793,7 @@ static char zHelp[] =
#ifdef SQLITE_ENABLE_IOTRACE
".iotrace FILE Enable I/O diagnostic logging to FILE\n"
#endif
".limit ?LIMIT? ?VAL? Display or change the value of an SQLITE_LIMIT\n"
#ifndef SQLITE_OMIT_LOAD_EXTENSION
".load FILE ?ENTRY? Load an extension library\n"
#endif
@@ -3171,6 +3172,63 @@ static int do_meta_command(char *zLine, ShellState *p){
}
}else
#endif
if( c=='l' && n>=5 && strncmp(azArg[0], "limits", n)==0 ){
static const struct {
const char *zLimitName; /* Name of a limit */
int limitCode; /* Integer code for that limit */
} aLimit[] = {
{ "length", SQLITE_LIMIT_LENGTH },
{ "sql_length", SQLITE_LIMIT_SQL_LENGTH },
{ "column", SQLITE_LIMIT_COLUMN },
{ "expr_depth", SQLITE_LIMIT_EXPR_DEPTH },
{ "compound_select", SQLITE_LIMIT_COMPOUND_SELECT },
{ "vdbe_op", SQLITE_LIMIT_VDBE_OP },
{ "function_arg", SQLITE_LIMIT_FUNCTION_ARG },
{ "attached", SQLITE_LIMIT_ATTACHED },
{ "like_pattern_length", SQLITE_LIMIT_LIKE_PATTERN_LENGTH },
{ "variable_number", SQLITE_LIMIT_VARIABLE_NUMBER },
{ "trigger_depth", SQLITE_LIMIT_TRIGGER_DEPTH },
{ "worker_threads", SQLITE_LIMIT_WORKER_THREADS },
};
int i, n2;
open_db(p, 0);
if( nArg==1 ){
for(i=0; i<sizeof(aLimit)/sizeof(aLimit[0]); i++){
printf("%20s %d\n", aLimit[i].zLimitName,
sqlite3_limit(p->db, aLimit[i].limitCode, -1));
}
}else if( nArg>3 ){
fprintf(stderr, "Usage: .limit NAME ?NEW-VALUE?\n");
rc = 1;
goto meta_command_exit;
}else{
int iLimit = -1;
n2 = strlen30(azArg[1]);
for(i=0; i<sizeof(aLimit)/sizeof(aLimit[0]); i++){
if( sqlite3_strnicmp(aLimit[i].zLimitName, azArg[1], n2)==0 ){
if( iLimit<0 ){
iLimit = i;
}else{
fprintf(stderr, "ambiguous limit: \"%s\"\n", azArg[1]);
rc = 1;
goto meta_command_exit;
}
}
}
if( iLimit<0 ){
fprintf(stderr, "unknown limit: \"%s\"\n"
"enter \".limits\" with no arguments for a list.\n",
azArg[1]);
rc = 1;
goto meta_command_exit;
}
if( nArg==3 ){
sqlite3_limit(p->db, aLimit[iLimit].limitCode, integerValue(azArg[2]));
}
printf("%20s %d\n", aLimit[iLimit].zLimitName,
sqlite3_limit(p->db, aLimit[iLimit].limitCode, -1));
}
}else
#ifndef SQLITE_OMIT_LOAD_EXTENSION
if( c=='l' && strncmp(azArg[0], "load", n)==0 ){