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In the command-line shell add the (undocumented and unsupported) ".eqp"

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command and -eqp command-line option, to cause EXPLAIN QUERY PLAN to be
run on each SQL statement as it is evaluated.  Intended use is for analysis
of the query planner.

FossilOrigin-Name: e6ecf7337658624d664e1e71ba3fc527fd6578c1
This commit is contained in:
drh 2014-02-28 20:47:24 +00:00
parent 07901eb8c3
commit efbf3b1a10
3 changed files with 32 additions and 7 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Provide\san\s#ifdef\sin\sshell.c\sto\swork\saround\sissues\swhen\scross-compiling\nfrom\sUbuntu\sto\swindows.
D 2014-02-28T19:37:45.291
C In\sthe\scommand-line\sshell\sadd\sthe\s(undocumented\sand\sunsupported)\s".eqp"\ncommand\sand\s-eqp\scommand-line\soption,\sto\scause\sEXPLAIN\sQUERY\sPLAN\sto\sbe\nrun\son\seach\sSQL\sstatement\sas\sit\sis\sevaluated.\s\sIntended\suse\sis\sfor\sanalysis\nof\sthe\squery\splanner.
D 2014-02-28T20:47:24.221
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in 2ef13430cd359f7b361bb863504e227b25cc7f81
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@ -217,7 +217,7 @@ F src/random.c d10c1f85b6709ca97278428fd5db5bbb9c74eece
F src/resolve.c ca8b99d894164435f5c55cb304c1b8121705c51e
F src/rowset.c 64655f1a627c9c212d9ab497899e7424a34222e0
F src/select.c 35b07a47fdee9a98e03c4ffb3801026c72114cb7
F src/shell.c e6d573326f12901df3801777831b48bd80c11dab
F src/shell.c 7bf07bcacb181ecc3fc3ccacfdfeb4084aee67ed
F src/sqlite.h.in a2ef671f92747a5a1c8a47bad5c585a8dd9eca80
F src/sqlite3.rc 11094cc6a157a028b301a9f06b3d03089ea37c3e
F src/sqlite3ext.h 886f5a34de171002ad46fae8c36a7d8051c190fc
@ -1152,7 +1152,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
P 51ce713c6ee91bdf0126155334dcc800b3daa509
R f77dc22964f582c1f952cbee70cf06fb
P 0a3579d9b9d2a60bb85a9811bc7936edb88debae
R 195e6e751f71ffa9e9cfd28d6f8e532d
U drh
Z 5ee6ba31533a91dba4172ad5a5e2ece1
Z d48791979092ee78fb00c8a21c663b3b

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0a3579d9b9d2a60bb85a9811bc7936edb88debae
e6ecf7337658624d664e1e71ba3fc527fd6578c1

25
src/shell.c
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@ -446,6 +446,7 @@ struct previous_mode_data {
struct callback_data {
sqlite3 *db; /* The database */
int echoOn; /* True to echo input commands */
int autoEQP; /* Run EXPLAIN QUERY PLAN prior to seach SQL statement */
int statsOn; /* True to display memory stats before each finalize */
int cnt; /* Number of records displayed so far */
FILE *out; /* Write results here */
@ -1302,6 +1303,23 @@ static int shell_exec(
fprintf(pArg->out, "%s\n", zStmtSql ? zStmtSql : zSql);
}
/* Show the EXPLAIN QUERY PLAN if .eqp is on */
if( pArg && pArg->autoEQP ){
sqlite3_stmt *pExplain;
char *zEQP = sqlite3_mprintf("EXPLAIN QUERY PLAN %s", sqlite3_sql(pStmt));
rc = sqlite3_prepare_v2(db, zEQP, -1, &pExplain, 0);
if( rc==SQLITE_OK ){
while( sqlite3_step(pExplain)==SQLITE_ROW ){
fprintf(pArg->out,"--EQP-- %d,", sqlite3_column_int(pExplain, 0));
fprintf(pArg->out,"%d,", sqlite3_column_int(pExplain, 1));
fprintf(pArg->out,"%d,", sqlite3_column_int(pExplain, 2));
fprintf(pArg->out,"%s\n", sqlite3_column_text(pExplain, 3));
}
}
sqlite3_finalize(pExplain);
sqlite3_free(zEQP);
}
/* Output TESTCTRL_EXPLAIN text of requested */
if( pArg && pArg->mode==MODE_Explain ){
const char *zExplain = 0;
@ -2301,6 +2319,10 @@ static int do_meta_command(char *zLine, struct callback_data *p){
p->echoOn = booleanValue(azArg[1]);
}else
if( c=='e' && strncmp(azArg[0], "eqp", n)==0 && nArg>1 && nArg<3 ){
p->autoEQP = booleanValue(azArg[1]);
}else
if( c=='e' && strncmp(azArg[0], "exit", n)==0 ){
if( nArg>1 && (rc = (int)integerValue(azArg[1]))!=0 ) exit(rc);
rc = 2;
@ -2873,6 +2895,7 @@ static int do_meta_command(char *zLine, struct callback_data *p){
if( c=='s' && strncmp(azArg[0], "show", n)==0 && nArg==1 ){
int i;
fprintf(p->out,"%9.9s: %s\n","echo", p->echoOn ? "on" : "off");
fprintf(p->out,"%9.9s: %s\n","eqp", p->autoEQP ? "on" : "off");
fprintf(p->out,"%9.9s: %s\n","explain", p->explainPrev.valid ? "on" :"off");
fprintf(p->out,"%9.9s: %s\n","headers", p->showHeader ? "on" : "off");
fprintf(p->out,"%9.9s: %s\n","mode", modeDescr[p->mode]);
@ -3710,6 +3733,8 @@ int main(int argc, char **argv){
data.showHeader = 0;
}else if( strcmp(z,"-echo")==0 ){
data.echoOn = 1;
}else if( strcmp(z,"-eqp")==0 ){
data.autoEQP = 1;
}else if( strcmp(z,"-stats")==0 ){
data.statsOn = 1;
}else if( strcmp(z,"-bail")==0 ){