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c16a1bbcf4
ECPG's PREPARE ... FROM and EXECUTE IMMEDIATE can optionally take the target query as a simple literal, rather than the more usual string-variable reference. This was previously documented as being a C string literal, but that's a lie in one critical respect: you can't write a data double quote as \" in such literals. That's because the lexer is in SQL mode at this point, so it'll parse double-quoted strings as SQL identifiers, within which backslash is not special, so \" ends the literal. I looked into making this work as documented, but getting the lexer to switch behaviors at just the right point is somewhere between very difficult and impossible. It's not really worth the trouble, because these cases are next to useless: if you have a fixed SQL statement to execute or prepare, you might as well write it as a direct EXEC SQL, saving the messiness of converting it into a string literal and gaining the opportunity for compile-time SQL syntax checking. Instead, let's just document (and test) the workaround of writing a double quote as an octal escape (\042) in such cases. There's no code behavioral change here, so in principle this could be back-patched, but it's such a niche case I doubt it's worth the trouble. Per report from 1250kv. Discussion: https://postgr.es/m/673825.1603223178@sss.pgh.pa.us
332 lines
8.0 KiB
C
332 lines
8.0 KiB
C
/* Processed by ecpg (regression mode) */
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/* These include files are added by the preprocessor */
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#include <ecpglib.h>
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#include <ecpgerrno.h>
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#include <sqlca.h>
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/* End of automatic include section */
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#define ECPGdebug(X,Y) ECPGdebug((X)+100,(Y))
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#line 1 "execute.pgc"
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#include <stdlib.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#line 1 "regression.h"
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#line 6 "execute.pgc"
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/* exec sql whenever sqlerror sqlprint ; */
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#line 8 "execute.pgc"
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int
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main(void)
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{
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/* exec sql begin declare section */
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#line 14 "execute.pgc"
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int amount [ 8 ] ;
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#line 15 "execute.pgc"
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int increment = 100 ;
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#line 16 "execute.pgc"
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char name [ 8 ] [ 8 ] ;
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#line 17 "execute.pgc"
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char letter [ 8 ] [ 1 ] ;
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#line 18 "execute.pgc"
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char command [ 128 ] ;
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/* exec sql end declare section */
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#line 19 "execute.pgc"
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int i,j;
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ECPGdebug(1, stderr);
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{ ECPGconnect(__LINE__, 0, "ecpg1_regression" , NULL, NULL , "main", 0);
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#line 24 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 24 "execute.pgc"
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "create table test ( name char ( 8 ) , amount int , letter char ( 1 ) )", ECPGt_EOIT, ECPGt_EORT);
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#line 25 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 25 "execute.pgc"
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{ ECPGtrans(__LINE__, NULL, "commit");
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#line 26 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 26 "execute.pgc"
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/* test handling of embedded quotes in EXECUTE IMMEDIATE "literal" */
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_exec_immediate, "insert into test (name, \042amount\042, letter) values ('db: ''r1''', 1, 'f')", ECPGt_EOIT, ECPGt_EORT);
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#line 29 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 29 "execute.pgc"
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sprintf(command, "insert into test (name, amount, letter) values ('db: ''r1''', 2, 't')");
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_exec_immediate, command, ECPGt_EOIT, ECPGt_EORT);
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#line 32 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 32 "execute.pgc"
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sprintf(command, "insert into test (name, amount, letter) select name, amount+10, letter from test");
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_exec_immediate, command, ECPGt_EOIT, ECPGt_EORT);
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#line 35 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 35 "execute.pgc"
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printf("Inserted %ld tuples via execute immediate\n", sqlca.sqlerrd[2]);
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sprintf(command, "insert into test (name, amount, letter) select name, amount+$1, letter from test");
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{ ECPGprepare(__LINE__, NULL, 0, "i", command);
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#line 40 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 40 "execute.pgc"
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_execute, "i",
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ECPGt_int,&(increment),(long)1,(long)1,sizeof(int),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT, ECPGt_EORT);
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#line 41 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 41 "execute.pgc"
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printf("Inserted %ld tuples via prepared execute\n", sqlca.sqlerrd[2]);
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{ ECPGtrans(__LINE__, NULL, "commit");
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#line 45 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 45 "execute.pgc"
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sprintf (command, "select * from test");
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{ ECPGprepare(__LINE__, NULL, 0, "f", command);
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#line 49 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 49 "execute.pgc"
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/* declare CUR cursor for $1 */
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#line 50 "execute.pgc"
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "declare CUR cursor for $1",
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ECPGt_char_variable,(ECPGprepared_statement(NULL, "f", __LINE__)),(long)1,(long)1,(1)*sizeof(char),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT, ECPGt_EORT);
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#line 52 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 52 "execute.pgc"
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "fetch 8 in CUR", ECPGt_EOIT,
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ECPGt_char,(name),(long)8,(long)8,(8)*sizeof(char),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L,
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ECPGt_int,(amount),(long)1,(long)8,sizeof(int),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L,
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ECPGt_char,(letter),(long)1,(long)8,(1)*sizeof(char),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EORT);
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#line 53 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 53 "execute.pgc"
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for (i=0, j=sqlca.sqlerrd[2]; i<j; i++)
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{
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/* exec sql begin declare section */
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#line 58 "execute.pgc"
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char n [ 8 ] , l = letter [ i ] [ 0 ] ;
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#line 59 "execute.pgc"
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int a = amount [ i ] ;
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/* exec sql end declare section */
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#line 60 "execute.pgc"
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strncpy(n, name[i], 8);
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printf("name[%d]=%8.8s\tamount[%d]=%d\tletter[%d]=%c\n", i, n, i, a, i, l);
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}
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "close CUR", ECPGt_EOIT, ECPGt_EORT);
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#line 66 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 66 "execute.pgc"
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{ ECPGdeallocate(__LINE__, 0, NULL, "f");
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#line 67 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 67 "execute.pgc"
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sprintf (command, "select * from test where amount = $1");
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{ ECPGprepare(__LINE__, NULL, 0, "f", command);
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#line 71 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 71 "execute.pgc"
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/* declare CUR2 cursor for $1 */
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#line 72 "execute.pgc"
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "declare CUR2 cursor for $1",
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ECPGt_char_variable,(ECPGprepared_statement(NULL, "f", __LINE__)),(long)1,(long)1,(1)*sizeof(char),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L,
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ECPGt_const,"1",(long)1,(long)1,strlen("1"),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT, ECPGt_EORT);
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#line 74 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 74 "execute.pgc"
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "fetch in CUR2", ECPGt_EOIT,
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ECPGt_char,(name),(long)8,(long)8,(8)*sizeof(char),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L,
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ECPGt_int,(amount),(long)1,(long)8,sizeof(int),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L,
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ECPGt_char,(letter),(long)1,(long)8,(1)*sizeof(char),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EORT);
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#line 75 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 75 "execute.pgc"
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for (i=0, j=sqlca.sqlerrd[2]; i<j; i++)
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{
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/* exec sql begin declare section */
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#line 80 "execute.pgc"
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char n [ 8 ] , l = letter [ i ] [ 0 ] ;
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#line 81 "execute.pgc"
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int a = amount [ i ] ;
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/* exec sql end declare section */
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#line 82 "execute.pgc"
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strncpy(n, name[i], 8);
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printf("name[%d]=%8.8s\tamount[%d]=%d\tletter[%d]=%c\n", i, n, i, a, i, l);
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}
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "close CUR2", ECPGt_EOIT, ECPGt_EORT);
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#line 88 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 88 "execute.pgc"
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{ ECPGdeallocate(__LINE__, 0, NULL, "f");
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#line 89 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 89 "execute.pgc"
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sprintf (command, "select * from test where amount = $1");
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{ ECPGprepare(__LINE__, NULL, 0, "f", command);
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#line 93 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 93 "execute.pgc"
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_execute, "f",
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ECPGt_const,"2",(long)1,(long)1,strlen("2"),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT,
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ECPGt_char,(name),(long)8,(long)8,(8)*sizeof(char),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L,
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ECPGt_int,(amount),(long)1,(long)8,sizeof(int),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L,
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ECPGt_char,(letter),(long)1,(long)8,(1)*sizeof(char),
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ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EORT);
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#line 94 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 94 "execute.pgc"
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for (i=0, j=sqlca.sqlerrd[2]; i<j; i++)
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{
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/* exec sql begin declare section */
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#line 99 "execute.pgc"
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char n [ 8 ] , l = letter [ i ] [ 0 ] ;
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#line 100 "execute.pgc"
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int a = amount [ i ] ;
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/* exec sql end declare section */
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#line 101 "execute.pgc"
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strncpy(n, name[i], 8);
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printf("name[%d]=%8.8s\tamount[%d]=%d\tletter[%d]=%c\n", i, n, i, a, i, l);
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}
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{ ECPGdeallocate(__LINE__, 0, NULL, "f");
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#line 107 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 107 "execute.pgc"
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{ ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "drop table test", ECPGt_EOIT, ECPGt_EORT);
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#line 108 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 108 "execute.pgc"
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{ ECPGtrans(__LINE__, NULL, "commit");
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#line 109 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 109 "execute.pgc"
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{ ECPGdisconnect(__LINE__, "CURRENT");
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#line 110 "execute.pgc"
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if (sqlca.sqlcode < 0) sqlprint();}
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#line 110 "execute.pgc"
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return 0;
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}
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