postgres.git / summary / log / commit / refs

commit    e459eb9fb0c2af5c1363327df7ed0db3ab0042d2
Author:   Tom Lane <tgl@sss.pgh.pa.us>
Date:     Wed Feb 28 21:57:38 2018 +0000
First released in: 11.0, 9.3.23, 9.4.18, 9.5.13, 9.6.9, 10.4

    Remove restriction on SQL block length in isolationtester scanner.
    
    specscanner.l had a fixed limit of 1024 bytes on the length of
    individual SQL stanzas in an isolation test script.  People are
    starting to run into that, so fix it by making the buffer resizable.
    
    Once we allow this in HEAD, it seems inevitable that somebody will
    try to back-patch a test that exceeds the old limit, so back-patch
    this change as a preventive measure.
    
    Daniel Gustafsson
    
    Discussion: https://postgr.es/m/8D628BE4-6606-4FF6-A3FF-8B2B0E9B43D0@yesql.se


 src/test/isolation/specscanner.l | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/test/isolation/specscanner.l b/src/test/isolation/specscanner.l
index df592369e59..25554c27edd 100644
--- a/src/test/isolation/specscanner.l
+++ b/src/test/isolation/specscanner.l
@@ -12,8 +12,10 @@
 
 static int	yyline = 1;			/* line number for error reporting */
 
-static char litbuf[1024];
-static int litbufpos = 0;
+#define LITBUF_INIT	1024		/* initial size of litbuf */
+static char *litbuf = NULL;
+static size_t litbufsize = 0;
+static size_t litbufpos = 0;
 
 static void addlitchar(char c);
 
@@ -39,6 +41,11 @@ comment			("#"{non_newline}*)
 
 %%
 
+%{
+	litbuf = pg_malloc(LITBUF_INIT);
+	litbufsize = LITBUF_INIT;
+%}
+
 permutation		{ return(PERMUTATION); }
 session			{ return(SESSION); }
 setup			{ return(SETUP); }
@@ -96,10 +103,12 @@ teardown		{ return(TEARDOWN); }
 static void
 addlitchar(char c)
 {
-	if (litbufpos >= sizeof(litbuf) - 1)
+	/* We must always leave room to add a trailing \0 */
+	if (litbufpos >= litbufsize - 1)
 	{
-		fprintf(stderr, "SQL step too long\n");
-		exit(1);
+		/* Double the size of litbuf if it gets full */
+		litbufsize += litbufsize;
+		litbuf = pg_realloc(litbuf, litbufsize);
 	}
 	litbuf[litbufpos++] = c;
 }


[parent: f171cbe0d90e]