#include "common/pg_prng.h"
#include "executor/instrument.h"
#include "jit/jit.h"
+#include "nodes/params.h"
#include "utils/guc.h"
PG_MODULE_MAGIC;
/* GUC variables */
static int auto_explain_log_min_duration = -1; /* msec or -1 */
+static int auto_explain_log_parameter_max_length = -1; /* bytes or -1 */
static bool auto_explain_log_analyze = false;
static bool auto_explain_log_verbose = false;
static bool auto_explain_log_buffers = false;
NULL,
NULL);
+ DefineCustomIntVariable("auto_explain.log_parameter_max_length",
+ "Sets the maximum length of query parameters to log.",
+ "Zero logs no query parameters, -1 logs them in full.",
+ &auto_explain_log_parameter_max_length,
+ -1,
+ -1, INT_MAX,
+ PGC_SUSET,
+ GUC_UNIT_BYTE,
+ NULL,
+ NULL,
+ NULL);
+
DefineCustomBoolVariable("auto_explain.log_analyze",
"Use EXPLAIN ANALYZE for plan logging.",
NULL,
ExplainBeginOutput(es);
ExplainQueryText(es, queryDesc);
+ ExplainQueryParameters(es, queryDesc->params, auto_explain_log_parameter_max_length);
ExplainPrintPlan(es, queryDesc);
if (es->analyze && auto_explain_log_triggers)
ExplainPrintTriggers(es, queryDesc);
qr/Query Text: SELECT \* FROM pg_class;/,
"query text logged, text mode");
+unlike(
+ $log_contents,
+ qr/Query Parameters:/,
+ "no query parameters logged when none, text mode");
+
like(
$log_contents,
qr/Seq Scan on pg_class/,
qr/Query Text: PREPARE get_proc\(name\) AS SELECT \* FROM pg_proc WHERE proname = \$1;/,
"prepared query text logged, text mode");
+like(
+ $log_contents,
+ qr/Query Parameters: \$1 = 'int4pl'/,
+ "query parameters logged, text mode");
+
like(
$log_contents,
qr/Index Scan using pg_proc_proname_args_nsp_index on pg_proc/,
"index scan logged, text mode");
+
+# Prepared query with truncated parameters.
+$log_contents = query_log(
+ $node,
+ q{PREPARE get_type(name) AS SELECT * FROM pg_type WHERE typname = $1; EXECUTE get_type('float8');},
+ { "auto_explain.log_parameter_max_length" => 3 });
+
+like(
+ $log_contents,
+ qr/Query Text: PREPARE get_type\(name\) AS SELECT \* FROM pg_type WHERE typname = \$1;/,
+ "prepared query text logged, text mode");
+
+like(
+ $log_contents,
+ qr/Query Parameters: \$1 = 'flo\.\.\.'/,
+ "query parameters truncated, text mode");
+
+# Prepared query with parameter logging disabled.
+$log_contents = query_log(
+ $node,
+ q{PREPARE get_type(name) AS SELECT * FROM pg_type WHERE typname = $1; EXECUTE get_type('float8');},
+ { "auto_explain.log_parameter_max_length" => 0 });
+
+like(
+ $log_contents,
+ qr/Query Text: PREPARE get_type\(name\) AS SELECT \* FROM pg_type WHERE typname = \$1;/,
+ "prepared query text logged, text mode");
+
+unlike(
+ $log_contents,
+ qr/Query Parameters:/,
+ "query parameters not logged when disabled, text mode");
+
# JSON format.
$log_contents = query_log(
$node,
qr/"Query Text": "SELECT \* FROM pg_proc;"/,
"query text logged, json mode");
+unlike(
+ $log_contents,
+ qr/"Query Parameters":/,
+ "query parameters not logged when none, json mode");
+
like(
$log_contents,
qr/"Node Type": "Seq Scan"[^}]*"Relation Name": "pg_proc"/s,
</listitem>
</varlistentry>
+ <varlistentry>
+ <term>
+ <varname>auto_explain.log_parameter_max_length</varname> (<type>integer</type>)
+ <indexterm>
+ <primary><varname>auto_explain.log_parameter_max_length</varname> configuration parameter</primary>
+ </indexterm>
+ </term>
+ <listitem>
+ <para>
+ <varname>auto_explain.log_parameter_max_length</varname> controls the
+ logging of query parameter values. A value of<literal>-1</literal> (the
+ default) logs the parameter values in full. <literal>0</literal> disables
+ logging of parameter values. A value greater than zero truncates each
+ parameter value to that many bytes. Only superusers can change this
+ setting.
+ </para>
+ </listitem>
+ </varlistentry>
+
<varlistentry>
<term>
<varname>auto_explain.log_analyze</varname> (<type>boolean</type>)
ExplainPropertyText("Query Text", queryDesc->sourceText, es);
}
+/*
+ * ExplainQueryParameters -
+ * add a "Query Parameters" node that describes the parameters of the query
+ *
+ * The caller should have set up the options fields of *es, as well as
+ * initializing the output buffer es->str.
+ *
+ */
+void
+ExplainQueryParameters(ExplainState *es, ParamListInfo params, int maxlen)
+{
+ char *str;
+
+ /* This check is consistent with errdetail_params() */
+ if (params == NULL || params->numParams <= 0 || maxlen == 0)
+ return;
+
+ str = BuildParamLogString(params, NULL, maxlen);
+ if (str && str[0] != '\0')
+ ExplainPropertyText("Query Parameters", str, es);
+}
+
/*
* report_triggers -
* report execution stats for a single relation's triggers
extern void ExplainPrintJITSummary(ExplainState *es, QueryDesc *queryDesc);
extern void ExplainQueryText(ExplainState *es, QueryDesc *queryDesc);
+extern void ExplainQueryParameters(ExplainState *es, ParamListInfo params, int maxlen);
extern void ExplainBeginOutput(ExplainState *es);
extern void ExplainEndOutput(ExplainState *es);